Patent Publication Number: US-2022216409-A1

Title: Organic Light Emitting Device

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     The present application claims the benefit of Republic of Korea Patent Application No. 10-2020-0184955 filed in the Republic of Korea on Dec. 28, 2020, which is hereby incorporated by reference in its entirety. 
     FIELD OF TECHNOLOGY 
     The present disclosure relates to an organic light emitting device, and more specifically, to an organic light emitting diode (OLED) having enhanced emitting efficiency and lifespan and an organic light emitting device including the same. 
     BACKGROUND 
     As requests for a flat panel display device having a small occupied area have been increased, an organic light emitting display device including an OLED has been the subject of recent research and development. 
     The OLED emits light by injecting electrons from a cathode as an electron injection electrode and holes from an anode as a hole injection electrode into an emitting material layer (EML), combining the electrons with the holes, generating an exciton, and transforming the exciton from an excited state to a ground state. A flexible substrate, for example, a plastic substrate, can be used as a base substrate where elements are formed. In addition, the organic light emitting display device can be operated at a voltage (e.g., 10V or below) lower than a voltage required to operate other display devices. Moreover, the organic light emitting display device has advantages in the power consumption and the color sense. 
     The OLED includes a first electrode as an anode over a substrate, a second electrode, which is spaced apart from and faces the first electrode, and an organic emitting layer therebetween. 
     For example, the organic light emitting display device may include a red pixel region, a green pixel region and a blue pixel region, and the OLED may be formed in each of the red, green and blue pixel regions. 
     However, the OLED in the blue pixel does not provide sufficient emitting efficiency and lifespan such that the organic light emitting display device has a limitation in the emitting efficiency and the lifespan. 
     SUMMARY 
     The present disclosure is directed to an OLED and an organic light emitting device including the OLED that substantially obviate one or more of the problems associated with the limitations and disadvantages of the related conventional art. 
     Additional features and advantages of the present disclosure are set forth in the description which follows, and will be apparent from the description, or evident by practice of the present disclosure. The objectives and other advantages of the present disclosure are realized and attained by the features described herein as well as in the appended drawings. 
     To achieve these and other advantages in accordance with the purpose of the embodiments of the present disclosure, as described herein, an aspect of the present disclosure is an organic light emitting device including a substrate, and an organic light emitting diode positioned on the substrate and including a first electrode, a second electrode facing the first electrode, a first emitting material layer including a first dopant of a boron derivative and a first host of an anthracene derivative and positioned between the first and second electrodes, a first electron blocking layer including an electron blocking material and positioned between the first electrode and the first emitting material layer, and a first hole blocking layer including a hole blocking material and positioned between the second electrode and the first emitting material layer, wherein the first dopant is represented by Formula 1: [Formula 1] 
     
       
         
         
             
             
         
       
     
     wherein X is one of NR 1 , CR 2 R 3 , O, S, Se, SiR 4 R 5 , and each of R 1 , R 2 , R 3 , R 4  and R 5  is independently selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 6  to C 30  aryl group, C 5  to C 30  heteroaryl group, C 3  to C 30  cycloalkyl group and C 3  to C 30  alicyclic group, wherein each of R 61  to R 64  is independently selected from the group consisting of hydrogen, deuterium, C 1  to C 10  alkyl group unsubstituted or substituted with deuterium, C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, or adjacent two of R 61  to R 64  are connected to each other to form a fused ring, wherein each of R 71  to R 74  is independently selected from the group consisting of hydrogen, deuterium, C 1  to C 10  alkyl group and C 3  to C 30  alicyclic group, wherein R 81  is selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, or is connected with R 61  to form a fused ring, wherein R 82  is selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, wherein R 91  is selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 3  to C 15 cycloalkyl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with C 1  to C 10  alkyl, wherein when each of R 81 , R 82  and R 91  is C 6  to C 30  aryl group substituted with C 1  to C 10  alkyl, these alkyl groups are connected to each other to form a fused ring, wherein the first host is represented by Formula 2: 
     
       
         
         
             
             
         
       
     
     wherein each of Ar1 and Ar2 is independently C 6  to C 30  aryl group or C 5  to C 30  heteroaryl group, and L is a single bond or C 6  to C 30  arylene group, wherein a is an integer of 0 to 8, each of b, c and d is independently an integer of 0 to 30, wherein at least one of a, b, c and d is a positive integer, wherein the electron blocking material is represented by Formula 3: 
     
       
         
         
             
             
         
       
     
     wherein in Formula 3, L is arylene group, and a is 0 or 1, and wherein each of R 1  and R 2  is independently selected from the group consisting of unsubstituted or substituted C 6  to C 30  aryl group and unsubstituted or substituted C 5  to C 30  heteroaryl group. 
     It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to further explain the present disclosure as claimed. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the present disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the present disclosure and together with the description serve to explain the principles of the present disclosure. 
         FIG. 1  is a schematic circuit diagram illustrating an organic light emitting display device of the present disclosure. 
         FIG. 2  is a schematic cross-sectional view illustrating an organic light emitting display device according to a first embodiment of the present disclosure. 
         FIG. 3  is a schematic cross-sectional view illustrating an OLED having a single emitting part for the organic light emitting display device according to the first embodiment of the present disclosure. 
         FIG. 4  is a schematic cross-sectional view illustrating an OLED having a tandem structure of two emitting parts according to the first embodiment of the present disclosure. 
         FIG. 5  is a schematic cross-sectional view illustrating an organic light emitting display device according to a second embodiment of the present disclosure. 
         FIG. 6  is a schematic cross-sectional view illustrating an OLED having a tandem structure of two emitting parts according to the second embodiment of the present disclosure. 
         FIG. 7  is a schematic cross-sectional view illustrating an OLED having a tandem structure of three emitting parts according to the second embodiment of the present disclosure. 
         FIG. 8  is a schematic cross-sectional view illustrating an organic light emitting display device according to a third embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION 
     Reference will now be made in detail to some of the examples and preferred embodiments, which are illustrated in the accompanying drawings. 
       FIG. 1  is a schematic circuit diagram illustrating an organic light emitting display device of the present disclosure. 
     As illustrated in  FIG. 1 , a gate line GL and a data line DL, which cross each other to define a pixel (pixel region) P, and a power line PL are formed in an organic light emitting display device. A switching thin film transistor (TFT) Ts, a driving TFT Td, a storage capacitor Cst and an OLED D are formed in the pixel P. The pixel P may include a red pixel, a green pixel and a blue pixel. 
     The switching thin film transistor Ts is connected to the gate line GL and the data line DL, and the driving thin film transistor Td and the storage capacitor Cst are connected between the switching thin film transistor Ts and the power line PL. The OLED D is connected to the driving thin film transistor Td. When the switching thin film transistor Ts is turned on by the gate signal applied through the gate line GL, the data signal applied through the data line DL is applied to a gate electrode of the driving thin film transistor Td and one electrode of the storage capacitor Cst through the switching thin film transistor Ts. 
     The driving thin film transistor Td is turned on by the data signal applied into the gate electrode so that a current proportional to the data signal is supplied from the power line PL to the OLED D through the driving thin film transistor Td. The OLED D emits light having a luminance proportional to the current flowing through the driving thin film transistor Td. In this case, the storage capacitor Cst is charged with a voltage proportional to the data signal so that the voltage of the gate electrode in the driving thin film transistor Td is kept constant during one frame. Therefore, the organic light emitting display device can display a desired image. 
       FIG. 2  is a schematic cross-sectional view illustrating an organic light emitting display device according to a first embodiment of the present disclosure. 
     As illustrated in  FIG. 2 , the organic light emitting display device  100  includes a substrate  110 , a TFT Tr and an OLED D connected to the TFT Tr. For example, the organic light emitting display device  100  may include a red pixel, a green pixel, and a blue pixel, and the OLED D may be formed in each of the red, green, and blue pixels. Namely, the OLEDs D emitting red light, green light and blue light may be provided in the red, green and blue pixels, respectively. 
     The substrate  110  may be a glass substrate or a flexible substrate. For example, the flexible substrate may be one of a polyimide (PI) substrate, polyethersulfone (PES), polyethylenenaphthalate (PEN), polyethylene terephthalate (PET) and polycarbonate (PC). 
     A buffer layer  120  is formed on the substrate, and the TFT Tr is formed on the buffer layer  120 . The buffer layer  120  may be omitted. 
     A semiconductor layer  122  is formed on the buffer layer  120 . The semiconductor layer  122  may include an oxide semiconductor material or polycrystalline silicon. 
     When the semiconductor layer  122  includes the oxide semiconductor material, a light-shielding pattern (not shown) may be formed under the semiconductor layer  122 . The light to the semiconductor layer  122  is shielded or blocked by the light-shielding pattern such that thermal degradation of the semiconductor layer  122  can be prevented. On the other hand, when the semiconductor layer  122  includes polycrystalline silicon, impurities may be doped into both sides of the semiconductor layer  122 . 
     A gate insulating layer  124  is formed on the semiconductor layer  122 . The gate insulating layer  124  may be formed of an inorganic insulating material such as silicon oxide or silicon nitride. 
     A gate electrode  130 , which is formed of a conductive material, e.g., metal, is formed on the gate insulating layer  124  to correspond to a center of the semiconductor layer  122 . 
     In  FIG. 2 , the gate insulating layer  124  is formed on an entire surface of the substrate  110 . Alternatively, the gate insulating layer  124  may be patterned to have the same shape as the gate electrode  130 . 
     An interlayer insulating layer  132 , which is formed of an insulating material, is formed on the gate electrode  130 . The interlayer insulating layer  132  may be formed of an inorganic insulating material, e.g., silicon oxide or silicon nitride, or an organic insulating material, e.g., benzocyclobutene or photo-acryl. 
     The interlayer insulating layer  132  includes first and second contact holes  134  and  136  exposing both sides of the semiconductor layer  122 . The first and second contact holes  134  and  136  are positioned at both sides of the gate electrode  130  to be spaced apart from the gate electrode  130 . 
     The first and second contact holes  134  and  136  are formed through the gate insulating layer  124 . Alternatively, when the gate insulating layer  124  is patterned to have the same shape as the gate electrode  130 , the first and second contact holes  134  and  136  are formed only through the interlayer insulating layer  132 . 
     A source electrode  140  and a drain electrode  142 , which are formed of a conductive material, e.g., metal, are formed on the interlayer insulating layer  132 . 
     The source electrode  140  and the drain electrode  142  are spaced apart from each other with respect to the gate electrode  130  and respectively contact both sides of the semiconductor layer  122  through the first and second contact holes  134  and  136 . 
     The semiconductor layer  122 , the gate electrode  130 , the source electrode  140  and the drain electrode  142  constitute the TFT Tr. The TFT Tr serves as a driving element. Namely, the TFT Tr may correspond to the driving TFT Td (of  FIG. 1 ). 
     In the TFT Tr, the gate electrode  130 , the source electrode  140 , and the drain electrode  142  are positioned over the semiconductor layer  122 . Namely, the TFT Tr has a coplanar structure. 
     Alternatively, in the TFT Tr, the gate electrode may be positioned under the semiconductor layer, and the source and drain electrodes may be positioned over the semiconductor layer such that the TFT Tr may have an inverted staggered structure. In this instance, the semiconductor layer may include amorphous silicon. 
     Although not shown, the gate line and the data line cross each other to define the pixel, and the switching TFT is formed to be connected to the gate and data lines. The switching TFT is connected to the TFT Tr as the driving element. 
     In addition, the power line, which may be formed to be parallel to and spaced apart from one of the gate and data lines, and the storage capacitor for maintaining the voltage of the gate electrode of the TFT Tr in one frame may be further formed. 
     A passivation layer (or a planarization layer)  150 , which includes a drain contact hole  152  exposing the drain electrode  142  of the TFT Tr, is formed to cover the TFT Tr. 
     A first electrode  160 , which is connected to the drain electrode  142  of the TFT Tr through the drain contact hole  152 , is separately formed in each pixel and on the passivation layer  150 . The first electrode  160  may be an anode and may be formed of a conductive material, e.g., a transparent conductive oxide (TCO), having a relatively high work function. For example, the first electrode  160  may be formed of indium-tin-oxide (ITO), indium-zinc-oxide (IZO), indium-tin-zinc-oxide (ITZO), tin oxide (SnO), zinc oxide (ZnO), indium-copper-oxide (ICO) or aluminum-zinc-oxide (Al:ZnO, AZO). 
     When the organic light emitting display device  100  is operated in a bottom-emission type, the first electrode  160  may have a single-layered structure of the transparent conductive oxide. When the organic light emitting display device  100  is operated in a top-emission type, a reflection electrode or a reflection layer may be formed under the first electrode  160 . For example, the reflection electrode or the reflection layer may be formed of silver (Ag) or aluminum-palladium-copper (APC) alloy. In this instance, the first electrode  160  may have a triple-layered structure of ITO/Ag/ITO or ITO/APC/ITO. 
     A bank layer  166  is formed on the planarization layer  150  to cover an edge of the first electrode  160 . Namely, the bank layer  166  is positioned at a boundary of the pixel and exposes a center of the first electrode  160  in the pixel. 
     An organic emitting layer  162  is formed on the first electrode  160 . The organic emitting layer  162  may include an emitting material layer (EML) including an emitting material, an electron blocking layer (EBL) between the first electrode  160  and the EML and a hole blocking layer (HBL) between the EML and the second electrode  164 . 
     The organic emitting layer  162  is separated in each of the red, green and blue pixels. As illustrated below, the organic emitting layer  162  in the blue pixel includes a host of an anthracene derivative (an anthracene compound), at least a part of hydrogens of which is substituted with deuterium (deuterated), and a dopant of a boron derivative (a boron compound) such that the emitting efficiency and the lifespan of the OLED D in the blue pixel are improved. 
     In addition, in the OLED D, the EBL includes an amine derivative substituted by spirofluorene (e.g., “spirofluorene-substituted amine derivative”), and the HBL includes at least one of a hole blocking material of an azine derivative and a hole blocking material of a benzimidazole derivative. As a result, the lifespan of the OLED D and the organic light emitting display device  100  is further improved. 
     The second electrode  164  is formed over the substrate  110  where the organic emitting layer  162  is formed. The second electrode  164  covers an entire surface of the display area and may be formed of a conductive material having a relatively low work function to serve as a cathode. For example, the second electrode  164  may be formed of aluminum (Al), magnesium (Mg), silver (Ag) or their alloy, e.g., Al—Mg alloy (AlMg) or Ag—Mg alloy (MgAg). In the top-emission type organic light emitting display device  100 , the second electrode  164  may have a thin profile (small thickness) to provide a light transmittance property (or a semi-transmittance property). 
     The first electrode  160 , the organic emitting layer  162 , and the second electrode  164  constitute the OLED D. 
     An encapsulation film  170  is formed on the second electrode  164  to prevent penetration of moisture into the OLED D. The encapsulation film  170  includes a first inorganic insulating layer  172 , an organic insulating layer  174  and a second inorganic insulating layer  176  sequentially stacked, but it is not limited thereto. The encapsulation film  170  may be omitted. 
     The organic light emitting display device  100  may further include a polarization plate (not shown) for reducing an ambient light reflection. For example, the polarization plate may be a circular polarization plate. In the bottom-emission type organic light emitting display device  100 , the polarization plate may be disposed under the substrate  110 . In the top-emission type organic light emitting display device  100 , the polarization plate may be disposed on or over the encapsulation film  170 . 
     In addition, in the top-emission type organic light emitting display device  100 , a cover window (not shown) may be attached to the encapsulation film  170  or the polarization plate. In this instance, the substrate  110  and the cover window have a flexible property such that a flexible organic light emitting display device may be provided. 
       FIG. 3  is a schematic cross-sectional view illustrating an OLED having a single emitting part for the organic light emitting display device according to the first embodiment of the present disclosure. 
     As illustrated in  FIG. 3 , the OLED D includes the first electrode  160  and the second electrode  164 , which face each other, and the organic emitting layer  162  therebetween. The organic emitting layer  162  includes an EML  240  between the first and second electrodes  160  and  164 , an EBL  230  between the first electrode  160  and the EML  240  and an HBL between the EML  240  and the second electrode  164 . The organic light emitting display device  100  (of  FIG. 2 ) includes red, green and blue pixels, and the OLED D may be positioned in the blue pixel. 
     One of the first and second electrodes  160  and  164  is an anode, and the other one of the first and second electrodes  160  and  164  is a cathode. One of the first and second electrodes  160  and  164  is a transparent electrode (or a semi-transparent electrode) electrode, and the other one of the first and second electrodes  160  and  164  is a reflection electrode. 
     The organic emitting layer  162  may further include a hole transporting layer (HTL)  220  between the first electrode  160  and the EBL  230 . 
     In addition, the organic emitting layer  162  may further include a hole injection layer (HIL)  210  between the first electrode  160  and the HTL  220  and an electron injection layer (EIL)  260  between the second electrode  164  and the HBL  250 . 
     For example, the HIL  210  may include at least one compound selected from the group consisting of 4,4′,4″-tris(3-methylphenylamino)triphenylamine (MTDATA), 4,4′,4″-tris(N,N-diphenyl-amino)triphenylamine (NATA), 4,4′,4″-tris(N-(naphthalene-1-yl)-N-phenyl-amino)triphenylamine (1T-NATA), 4,4′,4″-tris(N-(naphthalene-2-yl)-N-phenyl-amino)triphenylamine (2T-NATA), copper phthalocyanine (CuPc), tris(4-carbazoyl-9-yl-phenyl)amine (TCTA), N,N′-diphenyl-N,N′-bis(1-naphthyl)-1,1′-biphenyl-4,4″-diamine (NPB or NPD), 1,4,5,8,9,11-hexaazatriphenylenehexacarbonitrile(dipyrazino[2,3-f:2′3′-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile (HAT-CN), 1,3,5-tris[4-(diphenylamino)phenyl]benzene (TDAPB), poly(3,4-ethylenedioxythiphene)polystyrene sulfonate (PEDOT/PSS) and N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine Alternatively, the HIL  210  may include a compound in Formula 12 as a host and a compound in Formula 13 as a dopant. 
     The HTL 220  may include at least one compound selected from the group consisting of N,N′-diphenyl-N,N′-bis(3-methylphenyl)-1,1′-biphenyl-4,4′-diamine (TPD), NPB (or NPD), 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP), poly[N,N′-bis(4-butylphenyl)-N,N′-bis(phenyl)-benzidine] (poly-TPD), (poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-sec-butylphenyl)diphenylamine))] (TFB), di-[4-(N,N-di-p-tolyl-amino)-phenyl]cyclohexane (TAPC), 3,5-di(9H-carbazol-9-yl)-N,N-diphenylaniline (DCDPA), N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, and N-(biphenyl-4-yl)-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)biphenyl-4-amine Alternatively, the HTL  220  may include the compound in Formula 12. 
     The EIL  260  may include at least one of an alkali metal, such as Li, an alkali halide compound, such as LiF, CsF, NaF, or BaF 2 , and an organo-metallic compound, such as Liq, lithium benzoate, or sodium stearate, but it is not limited thereto. Alternatively, the EIL  260  may include a compound in Formula 14 as a host and an alkali metal as a dopant. 
     The EML  240  includes the dopant  242  of a boron derivative and the host  244  of a deuterated anthracene derivative and provides blue emission. Namely, at least one hydrogen in an anthracene derivative is substituted with deuterium, and it may be referred to as a deuterated anthracene derivative. The boron derivative is not substituted with deuterium, or a part of hydrogens of a boron derivative is substituted with deuterium. It may be referred to as a non-deuterated boron derivative or a partially-deuterated boron derivative. 
     In the EML  240 , the host  244  is partially or wholly deuterated, and the dopant  242  is non-deuterated or partially deuterated. 
     The boron derivative as the dopant  242  may be represented by Formula 1-1 or 1-2. 
     
       
         
         
             
             
         
       
     
     In Formula 1-1, each of R 11  to R 14  and each of R 21  to R 24  is selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with C 1  to C 10  alkyl, or adjacent two of R 11  to R 14  and R 21  to R 24  are connected (combined, linked or joined) to each other to form a fused ring. Each of R 31  and R 41  is independently selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl and C 3  to C 30 alicyclic group unsubstituted or substituted with C 1  to C 10  alkyl. R 51  is selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 3  to C 15  cycloalkyl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with C 1  to C 10  alkyl, C 3  to C 30  alicyclic group unsubstituted or substituted with C 1  to C 10  alkyl and C 5  to C 30  hetero-ring group (e.g., heteroalicyclic group) unsubstituted or substituted with C 1  to C 10  alkyl. 
     When each of R 31 , R 41  and R 51  is C 6  to C 30  aryl group substituted with C 1  to C 10  alkyl, alkyl group may be connected to each other to form a fused ring. 
     For example, in Formula 1-1, each of R 11  to R 14 , each of R 21  to R 24  and each of R 31  and R 41  may be independently selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl and C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl, and R 51  may be selected from the group consisting of C 1  to C 10  alkyl group, C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with C 1  to C 10  alkyl and C 5  to C 30  hetero-ring group unsubstituted or substituted with C 1  to C 10  alkyl. 
     In an exemplary embodiment, in Formula 1-1, one of R 11  to R 14  and one of R 21  to R 24  may be C 1  to C 10  alkyl group, and the rest of R 11  to R 14  and the rest of R 21  to R 24  may be hydrogen. Each of R 31  and R 41  may be phenyl substituted with C 1  to C 10  alkyl or dibenzofuranyl substituted with C 1  to C 10  alkyl. R 51  may be alkyl group, diphenylamino group, heteroaryl group containing nitrogen, or hetero-ring group containing nitrogen. In this instance, C 1  to C 10  alkyl group may be tert-butyl. 
     Without other description, the fused ring may be C3 to C10 alicyclic ring. 
     In Formula 1-2, Xis one of NR 1 , CR 2 R 3 , O, S, Se, SiR 4 R 5 , and each of R 1 , R 2 , R 3 , R 4  and R 5  is independently selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 6  to C 30  aryl group, C 5  to C 30  heteroaryl group, C 3  to C 30  cycloalkyl group and C 3  to C 30  alicyclic group. Each of R 61  to R 64  is independently selected from the group consisting of hydrogen, deuterium, C 1  to C 10  alkyl group unsubstituted or substituted with deuterium, C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, or adjacent two of R 61  to R 64  are connected to each other to form a fused ring. Each of R 71  to R 74  is independently selected from the group consisting of hydrogen, deuterium, C 1  to C 10  alkyl group and C 3  to C 30  alicyclic group. R 61  is selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, or is connected with R 61  to form a fused ring. R 82  is selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, and R 91  is selected from the group consisting of hydrogen, C 1  to C 10  alkyl group, C 3  to C 15  cycloalkyl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl, C 6  to C 30  arylamino group unsubstituted or substituted with C 1  to C 10  alkyl and C 3  to C 30  alicyclic group unsubstituted or substituted with C 1  to C 10  alkyl. 
     When each of R 81 , R 82  and R 91  is C 6  to C 30  aryl group substituted with C 1  to C 10  alkyl, alkyl group may be connected to each other to form a fused ring. 
     For example, in Formula 1-2, X may be O or S. Each of R 61  to R 64  may be independently selected from the group consisting of hydrogen, deuterium, C 1  to C 10  alkyl group and C 6  to C 30  arylamino group unsubstituted or substituted with deuterium, or adjacent two of R 61  to R 64  may be connected to form a fused ring. Each of R 71  to R 74  may be independently selected from the group consisting of hydrogen, deuterium and C 1  to C 10  alkyl. R 81  may be selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, or may be connected with R 61  to form a fused ring. R 82  may be selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and C 5  to C 30  heteroaryl group unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl, and R 61  may be selected from the group consisting of C 1  to C 10  alkyl group. 
     In an exemplary embodiment, in Formula 1-2, X may be O. Each of R 61  to R 64  may be independently selected from the group consisting of hydrogen, deuterium and diphenylamino, or adjacent two of R 61  to R 64  may be connected to form a fused ring. In this instance, diphenylamino and the fused ring may be deuterated. Each of R 71  to R 74  may be independently selected from the group consisting of hydrogen, deuterium and C 1  to C 10  alkyl. Each of R 81  and R 82  may be independently selected from the group consisting of phenyl unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl and dibenzofuranyl unsubstituted or substituted with at least one of deuterium and C 1  to C 10  alkyl. R 91  may be C 1  to C 10  alkyl group. In this instance, C 1  to C 10  alkyl group may be tert-butyl. 
     In further exemplary embodiment, in Formula 1-2, R 73  may be C 1  to C 10  alkyl group, and each of R 71 , R 72  and R 74  may be independently hydrogen or deuterium. 
     In the boron derivative in Formula 1-2, other aromatic ring and hetero-aromatic ring except a benzene ring, which is combined to boron atom and two nitrogen atoms, may be deuterated. Namely, in Formula 1-2, R 91  may be not deuterium. 
     The deuterated anthracene derivative as the host  244  may be represented by Formula 2: 
     
       
         
         
             
             
         
       
     
     In Formula 2, each of Ar1 and Ar2 is independently C 6  to C 30  aryl group or C 5  to C 30  heteroaryl group, and L is a single bond or C 6  to C 30  arylene group. In addition, a is an integer of 0 to 8, each of b, c and d is independently an integer of 0 to 30, and at least one of a, b, c and d is a positive integer. (D denotes a deuterium atom, and each of a, b, c and d denotes a number of deuterium atoms.) 
     Ar1 and Ar2 may be same or different. 
     In Formula 2, Ar1 and Ar2 may be selected from the group consisting of phenyl, naphthyl, dibenzofuranyl, phenyl-dibenzofuranyl and a fused dibenzofuranyl, and L may be the single bond or phenylene. 
     For example, Ar1 may be selected from the group consisting of naphthyl, dibenzofuranyl, phenyl-dibenzofuranyl and a fused dibenzofuranyl, Ar2 may be selected from the group consisting of phenyl and naphthyl, and L may be the single bond or phenylene. 
     In an exemplary embodiment, in the deuterated anthracene derivative in Formula 2, 1-naphthalene moiety may be directly connected to anthracene moiety, and 2-naphthalene moiety may be connected to anthracene moiety directly or through a phenylene linker. At least one hydrogen, preferably all hydrogen, of the anthracene derivative is substituted with deuterium. 
     For example, the boron derivative in Formula 1-1 or 1-2 as the dopant  242  may be one of the compounds in Formula 3. 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     For example, the anthracene derivative in Formula 2 as the host  244  may be one of the compounds in Formula 4. 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     In the EML  240 , the dopant  242  may have a weight % of about 0.1 to 10, preferably 1 to 5, but it is not limited thereto. The EML  240  may have a thickness of about 100 to 500 Å, preferably 100 to 300 Å, but it is not limited thereto. 
     In the OLED D of the present disclosure, since the EML  240  includes the dopant  242  being the boron derivative and the host  244  being the deuterated anthracene derivative, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are improved. 
     In addition, when the EML  240  includes the boron derivative as the dopant  242  having an asymmetric structure as Formula 1-2, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     Moreover, when the EML  240  includes the boron derivative as the dopant  242 , in which other aromatic ring and hetero-aromatic ring except a benzene ring being combined to boron atom and two nitrogen atoms are partially or wholly deuterated, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     Furthermore, when the anthracene derivative as the host  244  includes two naphthalene moieties connected to the anthracene moiety and is partially or wholly deuterated, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  including the anthracene derivative are further improved. 
     [Synthesis of the Dopant] 
     1. Synthesis of the Compound 1-1 
     (1) The Compound I1-1c 
     
       
         
         
             
             
         
       
     
     The compound I1-1a (69.2 g, 98 mmol), the compound I1-1b (27.6 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-1c (58.1 g). (yield 84%). 
     (2) The Compound 1-1 
     
       
         
         
             
             
         
       
     
     The compound I1-1c (11.9 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium in heptane (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-1 (2.3 g). (yield 20%) 
     2. Synthesis of the Compound 1-4 
     (1) The Compound I1-4c 
     
       
         
         
             
             
         
       
     
     The compound I1-4a (43.1 g, 98 mmol), the compound I1-4b (27.6 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-4c (57.1 g). (yield 85%). 
     (2) The Compound 1-4 
     
       
         
         
             
             
         
       
     
     The compound I1-4c (8.6 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-4 (1.9 g). (yield 23%) 
     3. Synthesis of the Compound 1-6 
     (1) The Compound I1-6c 
     
       
         
         
             
             
         
       
     
     The compound I1-6a (58.9 g, 98 mmol), the compound I1-6b (33.2 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-6c (59.7 g). (yield 75%). 
     (2) The Compound 1-6 
     
       
         
         
             
             
         
       
     
     The compound I1-6c (10.1 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-6 (1.9 g). (yield 21%) 
     4. Synthesis of the Compound 1-8 
     (1) The Compound I1-8c 
     
       
         
         
             
             
         
       
     
     The compound I1-8a (33.0 g, 98 mmol), the compound I1-8b (45.7 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-8c (54.1 g). (yield 72%). 
     (2) The Compound 1-8 
     
       
         
         
             
             
         
       
     
     The compound I1-8c (9.6 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-8 (2.0 g). (yield 21%) 
     5. Synthesis of the Compound 1-11 
     (1) The Compound I1-11c 
     
       
         
         
             
             
         
       
     
     The compound I1-11a (28.4 g, 98 mmol), the compound I1-11b (52.0 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-11c (39.9 g). (yield 52%). 
     (2) The Compound 1-11 
     
       
         
         
             
             
         
       
     
     The compound I1-11c (9.8 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-11 (1.4 g). (yield 15%) 
     6. Synthesis of the Compound 1-12 
     (1) The Compound I1-12c 
     
       
         
         
             
             
         
       
     
     The compound I1-12a (28.0 g, 98 mmol), the compound I1-12b (51.6 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-12c (44.1 g). (yield 58%). 
     (2) The Compound 1-12 
     
       
         
         
             
             
         
       
     
     The compound I1-12c (9.7 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-12 (1.7 g). (yield 18%) 
     7. Synthesis of the Compound 1-13 
     (1) The Compound I1-13c 
     
       
         
         
             
             
         
       
     
     The compound I1-13a (34.8 g, 98 mmol), the compound I1-13b (46.6 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-13c (41.3 g). (yield 53%). 
     (2) The Compound 1-13 
     
       
         
         
             
             
         
       
     
     The compound I1-13c (9.9 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-13 (1.4 g). (yield 15%) 
     8. Synthesis of the Compound 1-17 
     (1) The Compound I1-17c 
     
       
         
         
             
             
         
       
     
     The compound I1-17a (33.4 g, 98 mmol), the compound I1-17b (46.1 g, 98 mmol), palladium acetate (0.45 g, 2 mmol), sodium tert-butoxide (18.9 g, 196 mmol), tri-tert-butylphosphine (0.8 g, 4 mmol), and toluene (300 mL) were added into 500 mL flask and were refluxed and stirred for 5 hours. After completion of reaction, the mixture was filtered, and residual solution was concentrated. The mixture was separated by a column chromatography to obtain the compound I1-17c (47.1 g). (yield 62%). 
     (2) The Compound 1-17 
     
       
         
         
             
             
         
       
     
     The compound I1-18c (9.7 g, 12.5 mmol) and tert-butylbenzene (60 ml) were added into 500 mL flask. In the temperature of −78° C., n-butyl-lithium (45 mL, 37.5 mmol) was dropwisely added into the mixture, and the mixture was stirred under the temperature of 60° C. for 3 hours. Heptane was removed by blowing nitrogen at 60° C. Boron tribromide (6.3 g, 25 mmol) was dropwisely added at −78° C. The mixture was stirred at room temperature for 1 hour, and N,N-diisopropylethylamine (3.2 g, 25 mmol) was dropwisely added at 0° C. The mixture was stirred at 120° C. for 2 hours. After completion of the reaction, an aqueous sodium acetate solution was added and stirred at room temperature. After extraction with ethyl acetate, the organic layer was concentrated. The mixture was separated by column chromatography to obtain the compound 1-17 (1.6 g). (yield 17%) 
     [Synthesis of the Host] 
     1. Synthesis of Compound 2-1 
     
       
         
         
             
             
         
       
     
     The compound I2-1a (2.0 g, 5.2 mmol), the compound 12-1b (1.5 g, 5.7 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.24 g, 0.26 mmol), and toluene (50 mL) were added into a 250 mL reactor in a dry box. After the reactor is removed from the dry box, and sodium carbonate anhydrous (2M, 20 mL) was added int the mixture. The reactant was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After the mixture was cooled to room temperature, the organic layer was separated from the mixture. The aqueous layer was washed with dichloromethane, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The gray powder was subjected to purification using alumina, precipitation using hexane, and column chromatography using silica gel to obtain the compound 2-1 (2.3 g) as a white powder. (yield 86%) 
     2. Synthesis of Compound 2-2 
     
       
         
         
             
             
         
       
     
     The compound I2-2a (2.0 g, 5.2 mmol), the compound I2-2b (1.5 g, 5.7 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.24 g, 0.26 mmol), and toluene (50 mL) were added into a 250 mL reactor in a dry box. After the reactor is removed from the dry box, and sodium carbonate anhydrous (2M, 20 mL) was added int the mixture. The reactant was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After the mixture was cooled to room temperature, the organic layer was separated from the mixture. The aqueous layer was washed with dichloromethane, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The gray powder was subjected to purification using alumina, precipitation using hexane, and column chromatography using silica gel to obtain the compound 2-2 (2.0 g) as a white powder. (yield 89%) 
     3. Synthesis of Compound 2-3 
     
       
         
         
             
             
         
       
     
     The compound I2-3a (2.0 g, 6.0 mmol), the compound I2-3b (1.9 g, 6.6 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.3 g, 0.3 mmol), and toluene (50 mL) were added into a 250 mL reactor in a dry box. After the reactor is removed from the dry box, and sodium carbonate anhydrous (2M, 20 mL) was added int the mixture. The reactant was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After the mixture was cooled to room temperature, the organic layer was separated from the mixture. The aqueous layer was washed with dichloromethane, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The gray powder was subjected to purification using alumina, precipitation using hexane, and column chromatography using silica gel to obtain the compound 2-3 (2.0 g) as a white powder. (yield 79%) 
     4. Synthesis of Compound 2-4 
     
       
         
         
             
             
         
       
     
     The compound I2-4a (2.0 g, 6.0 mmol), the compound I2-4b (2.4 g, 6.6 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.3 g, 0.3 mmol), and toluene (50 mL) were added into a 250 mL reactor in a dry box. After the reactor is removed from the dry box, and sodium carbonate anhydrous (2M, 20 mL) was added int the mixture. The reactant was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After the mixture was cooled to room temperature, the organic layer was separated from the mixture. The aqueous layer was washed with dichloromethane, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The gray powder was subjected to purification using alumina, precipitation using hexane, and column chromatography using silica gel to obtain the compound 2-4 (2.0 g) as a white powder. (yield 67%) 
     5. Synthesis of Compound 2-5 
     
       
         
         
             
             
         
       
     
     The compound I2-5a (2.0 g, 5.2 mmol), the compound I2-5b (2.0 g, 5.7 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.24 g, 0.26 mmol), and toluene (50 mL) were added into a 250 mL reactor in a dry box. After the reactor is removed from the dry box, and sodium carbonate anhydrous (2M, 20 mL) was added int the mixture. The reactant was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After the mixture was cooled to room temperature, the organic layer was separated from the mixture. The aqueous layer was washed with dichloromethane, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The gray powder was subjected to purification using alumina, precipitation using hexane, and column chromatography using silica gel to obtain the compound 2-5 (2.0 g) as a white powder. (yield 81%) 
     6. Synthesis of Compound 2-6 
     
       
         
         
             
             
         
       
     
     The compound I2-6a (2.0 g, 5.2 mmol), the compound I2-6b (2.0 g, 5.7 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.24 g, 0.26 mmol), and toluene (50 mL) were added into a 250 mL reactor in a dry box. After the reactor is removed from the dry box, and sodium carbonate anhydrous (2M, 20 mL) was added int the mixture. The reactant was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After the mixture was cooled to room temperature, the organic layer was separated from the mixture. The aqueous layer was washed with dichloromethane, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The gray powder was subjected to purification using alumina, precipitation using hexane, and column chromatography using silica gel to obtain the compound 2-6 (2.0 g) as a white powder. (yield 81%) 
     7. Synthesis of Compound 2-7 
     
       
         
         
             
             
         
       
     
     Under nitrogen condition, aluminum chloride (0.5 g, 3.6 mmol) was added into perdeuterobenzene solution (100 mL), where the compound 2-1 (5.0 g, 9.9 mmol) was dissolved. After the product by the mixture was stirred at room temperature for 6 hours, D 2 O (50 mL) was added. After the organic layer was separated, the aqueous layer was washed with dichloromethane (30 mL). The obtained organic layer was dried using magnesium sulfate, and volatiles were removed by rotary evaporation. Thereafter, the crude product was purified through column chromatography to obtain the compound 2-7 (4.5 g) as a white powder. (yield 85%) 
     8. Synthesis of Compound 2-8 
     
       
         
         
             
             
         
       
     
     Under nitrogen condition, aluminum chloride (0.9 g, 4.3 mmol) was added into perdeuterobenzene solution (120 mL), where the compound 2-2 (5.0 g, 11.6 mmol) was dissolved. After the product by the mixture was stirred at room temperature for 6 hours, D 2 O (70 mL) was added. After the organic layer was separated, the aqueous layer was washed with dichloromethane (50 mL). The obtained organic layer was dried using magnesium sulfate, and volatiles were removed by rotary evaporation. Thereafter, the crude product was purified through column chromatography to obtain the compound 2-8 (4.0 g) as a white powder. (yield 76%) 
     9. Synthesis of Compound 2-9 
     
       
         
         
             
             
         
       
     
     Under nitrogen condition, aluminum chloride (0.9 g, 4.3 mmol) was added into perdeuterobenzene solution (120 mL), where the compound 2-3 (5.0 g, 11.9 mmol) was dissolved. After the product by the mixture was stirred at room temperature for 6 hours, D 2 O (70 mL) was added. After the organic layer was separated, the aqueous layer was washed with dichloromethane (50 mL). The obtained organic layer was dried using magnesium sulfate, and volatiles were removed by rotary evaporation. Thereafter, the crude product was purified through column chromatography to obtain the compound 2-9 (3.0 g) as a white powder. (yield 57%) 
     10. Synthesis of Compound 2-10 
     
       
         
         
             
             
         
       
     
     Under nitrogen condition, aluminum chloride (0.9 g, 4.3 mmol) was added into perdeuterobenzene solution (120 mL), where the compound 2-4 (5.0 g, 10.1 mmol) was dissolved. After the product by the mixture was stirred at room temperature for 6 hours, D 2 O (70 mL) was added. After the organic layer was separated, the aqueous layer was washed with dichloromethane (50 mL). The obtained organic layer was dried using magnesium sulfate, and volatiles were removed by rotary evaporation. Thereafter, the crude product was purified through column chromatography to obtain the compound 2-10 (3.5 g) as a white powder. (yield 67%) 
     11. Synthesis of Compound 2-11 
     
       
         
         
             
             
         
       
     
     Under nitrogen condition, aluminum chloride (0.9 g, 4.3 mmol) was added into perdeuterobenzene solution (120 mL), where the compound 2-5 (5.0 g, 10.6 mmol) was dissolved. After the product by the mixture was stirred at room temperature for 6 hours, D 2 O (70 mL) was added. After the organic layer was separated, the aqueous layer was washed with dichloromethane (50 mL). The obtained organic layer was dried using magnesium sulfate, and volatiles were removed by rotary evaporation. Thereafter, the crude product was purified through column chromatography to obtain the compound 2-11 (4.0 g) as a white powder. (yield 77%) 
     12. Synthesis of Compound 2-12 
     
       
         
         
             
             
         
       
     
     Under nitrogen condition, aluminum chloride (0.9 g, 4.3 mmol) was added into perdeuterobenzene solution (120 mL), where the compound 2-6 (5.0 g, 10.6 mmol) was dissolved. After the product by the mixture was stirred at room temperature for 6 hours, D 2 O (70 mL) was added. After the organic layer was separated, the aqueous layer was washed with dichloromethane (50 mL). The obtained organic layer was dried using magnesium sulfate, and volatiles were removed by rotary evaporation. Thereafter, the crude product was purified through column chromatography to obtain the compound 2-12 (4.3 g) as a white powder. (yield 82%) 
     The EBL  230  includes an amine derivative as an electron blocking material  232 . The electron blocking material  232  may be represented by Formula 5: 
     
       
         
         
             
             
         
       
     
     In Formula 5, L is arylene group, and a is 0 or 1. Each of R 1  and R 2  is independently selected from the group consisting of unsubstituted or substituted C 6  to C 30  aryl group and unsubstituted or substituted C 5  to C 30  heteroaryl group. 
     In this instance, each of C 6  to C 30  aryl group and C 5  to C 30  heteroaryl group may be substituted with C 1  to C 10  alkyl or C 6  to C 30  aryl. Namely, In Formula 5, each of R 1  and R 2  is independently selected from the group consisting of C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl or C 6  to C 30  aryl and C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl or C 6  to C 30  aryl. 
     For example, L may be phenylene, and each of R 1  and R 2  may be selected from the group consisting of biphenyl, fluorenyl, carbazolyl, phenylcarbazolyl, carbazolylphenyl, dibenzothiophenyl and dibenzofuranyl. C 6  to C 30  aryl group and/or C 5  to C 30  heteroaryl group as R 1  and/or R 2  may be substituted by C 1  to C 10  alkyl or C 6  to C 30  aryl (e.g., phenyl) 
     Namely, the electron blocking material may be an amine derivative substituted with spirofluorene (e.g., “spirofluorene-substituted amine derivative”). 
     The electron blocking material  232  of Formula 5 may be one of the followings of Formula 6: 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     The HBL  250  includes a hole blocking material  252 . 
     For example, the hole blocking material  252  may be an azine derivative represented by Formula 7: 
     
       
         
         
             
             
         
       
     
     In Formula 7, each of Y 1  to Y 5  is independently CR 1  or N, and one to three of Y 1  to Y 5  is N. R 1  is independently hydrogen or C 6  to C 30  aryl group. L is C 6  to C 30  arylene group, and R 2  is C 6  to C 50  aryl group or C 5  to C 50  hetero aryl group. R 3  is C 1  to C 10  alkyl group, or adjacent two of R 3  form a fused ring. In addition, a is 0 or 1, b is 1 or 2, and c is an integer of 0 to 4. 
     The hole blocking material  252  of Formula 7 may be one of the followings of Formula 8: 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     Alternatively, the hole blocking material  252  of the HBL  250  may be a benzimidazole derivative represented by Formula 9: 
     
       
         
         
             
             
         
       
     
     In Formula 9, Ar is C 10  to C 30  arylene group, R 81  is C 6  to C 30  aryl group unsubstituted or substituted with C 1  to C 10  alkyl group or C 5  to C 30  heteroaryl group unsubstituted or substituted with C 1  to C 10  alkyl group, and each of R 82  and R 83  is independently hydrogen, C 1  to C 10  alkyl group or C 6  to C 30  aryl group. 
     For example, Ar may be naphthylene or anthracenylene, R 81  may be benzimidazolyl group or phenyl. R 82  may be methyl, ethyl or phenyl, and R 83  may be hydrogen, methyl or phenyl. 
     The hole blocking material  252  of Formula 9 may be one of the followings of Formula 10: 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     The hole blocking material  252  of the HBL  250  may include one of the compound in Formula 7 and the compound in Formula 9. 
     In this instance, a thickness of the EML  240  may be greater than that of each of the EBL  230  and the HBL  250  and may be smaller than that of the HTL  220 . For example, the EML  240  may have a thickness of about 150 to 250 Å, each of the EBL  230  and the HBL  250  may have a thickness of about 50 to 150 Å, and the HTL  220  may have a thickness of about 900 to 1100 Å. The EBL  230  and the HBL  250  may have the same thickness. 
     Alternatively, the hole blocking material  252  of the HBL  250  may include both of the compound in Formula 7 and the compound in Formula 9. For example, in the HBL  250 , the compound in Formula 7 and the compound in Formula 9 may have the same weight %. 
     In this instance, a thickness of the EML  240  may be greater than that of the EBL  230  and may be smaller than that of the HBL  250 . In addition, the thickness of the HBL  250  may be smaller than that of the HTL  220 . For example, the EML  240  may have a thickness of about 200 to 300 Å, and the EBL  230  may have a thickness of about 50 to 150 Å. The HBL  250  may have a thickness of about 250 to 350 Å, and the HTL  220  may have a thickness of about 800 to 1000 Å. 
     The compound in Formulas 7 and/or 9, i.e., the hole blocking material  252 , has excellent hole blocking property and excellent electron transporting property. Accordingly, the HBL  250  may serve as a hole blocking layer as well as an electron transporting layer (ETL). In this instance, the HBL  250  may directly contact the EIL  260  without the ETL. Alternatively, the HBL  250  may directly contact the second electrode  164  without the ETL and the EIL  260 . 
     In the OLED D, the EML  240  includes the dopant  242 , which is the boron derivative, and the host  244 , which is the deuterated anthracene derivative. As a result, the OLED D and the organic light emitting display device  100  have advantages in the emitting efficiency and the lifespan. 
     When the boron derivative as the dopant  242  has an asymmetric structure as Formula 1-2, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     In addition, when the boron derivative as the dopant  242 , in which other aromatic ring and hetero-aromatic ring except a benzene ring being combined to boron atom and two nitrogen atoms are partially or wholly deuterated, is included, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     Moreover, when the anthracene derivative as the host  244  includes two naphthalene moieties connected to the anthracene moiety and is partially or wholly deuterated, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  including the anthracene derivative are further improved. 
     Furthermore, since the EBL  230  includes the compound in Formula 5 as the electron blocking material  232  and the HBL  250  includes at least one of the compound in Formula 7 and the compound in Formula 9 as the hole blocking material  252 , the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     [Organic Light Emitting Diode 1] 
     The anode (ITO, 0.5 mm), the HIL (Formula 12 (97 wt %) and Formula 13 (3 wt %), 100 Å), the HTL (Formula 12, 1000 Å), the EBL (Formula 14, 100 Å), the EML (host (98 wt %) and dopant (2 wt %), 200 Å), the HBL (Formula 15, 100 Å), the EIL (Formula 16 (98 wt %) and Li (2 wt %), 200 Å) and the cathode (Al, 500 Å) was sequentially deposited. An encapsulation film is formed by using an UV curable epoxy and a moisture getter to form the OLED. 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     1. COMPARATIVE EXAMPLES 
     (1) Comparative Examples 1 to 8 (Ref1 to Ref8) 
     The compound 2-1 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (2) Comparative Examples 9 to 16 (Ref9 to Ref16) 
     The compound 2-2 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (3) Comparative Examples 17 to 24 (Ref17 to Ref24) 
     The compound 2-3 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (4) Comparative Examples 25 to 32 (Ref25 to Ref32) 
     The compound 2-4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (5) Comparative Examples 33 to 40 (Ref33 to Ref40) 
     The compound 2-5 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (6) Comparative Examples 41 to 48 (Ref41 to Ref48) 
     The compound 2-6 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     2. EXAMPLES 
     (1) Examples 1 to 8 (Ex1 to Ex8) 
     The compound 2-7 in Formula 4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (2) Examples 9 to 16 (Ex9 to Ex16) 
     The compound 2-8 in Formula 4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (3) Examples 17 to 24 (Ex17 to Ex24) 
     The compound 2-9 in Formula 4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (4) Examples 25 to 32 (Ex25 to Ex32) 
     The compound 2-10 in Formula 4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (5) Examples 33 to 40 (Ex33 to Ex40) 
     The compound 2-11 in Formula 4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     (6) Examples 41 to 48 (Ex41 to Ex48) 
     The compound 2-12 in Formula 4 is used as the host, and the compounds 1-1, 1-4, 1-6, 1-8, 1-11, 1-12, 1-13 and 1-17 in Formula 3 are respectively used as the dopant to form the EML. 
     The properties, i.e., the driving voltage (V), the external quantum efficiency (EQE), the color coordinate (CIE) and the lifespan (T 95 ), of the OLEDs manufactured in Comparative Examples 1 to 48 and Examples 1 to 48 are measured and listed in Tables 1 to 6. 
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 1 
               
               
                   
               
               
                   
                 Dopant 
                 Host 
                 V 
                 EQE (%) 
                 CIE(x, y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Ref 1 
                 1-1 
                 2-1 
                 3.99 
                 6.35 
                 (0.140, 0.061) 
                 63 
               
               
                 Ref 2 
                 1-4 
                 2-1 
                 3.94 
                 6.33 
                 (0.131, 0.089) 
                 68 
               
               
                 Ref 3 
                 1-6 
                 2-1 
                 3.90 
                 6.61 
                 (0.139, 0.074) 
                 88 
               
               
                 Ref 4 
                 1-8 
                 2-1 
                 3.88 
                 6.63 
                 (0.137, 0.079) 
                 82 
               
               
                 Ref 5 
                 1-11 
                 2-1 
                 3.89 
                 6.61 
                 (0.140, 0.074) 
                 101 
               
               
                 Ref 6 
                 1-12 
                 2-1 
                 3.90 
                 6.59 
                 (0.140, 0.073) 
                 95 
               
               
                 Ref 7 
                 1-13 
                 2-1 
                 3.91 
                 6.64 
                 (0.137, 0.080) 
                 94 
               
               
                 Ref 8 
                 1-17 
                 2-1 
                 3.91 
                 6.58 
                 (0.137, 0.079) 
                 89 
               
               
                 Ref 9 
                 1-1 
                 2-2 
                 4.20 
                 6.24 
                 (0.140, 0.060) 
                 69 
               
               
                 Ref 10 
                 1-4 
                 2-2 
                 4.20 
                 6.22 
                 (0.131, 0.090) 
                 74 
               
               
                 Ref 11 
                 1-6 
                 2-2 
                 4.15 
                 6.49 
                 (0.138, 0.074) 
                 96 
               
               
                 Ref 12 
                 1-8 
                 2-2 
                 4.19 
                 6.51 
                 (0.137, 0.079) 
                 106 
               
               
                 Ref 13 
                 1-11 
                 2-2 
                 4.20 
                 6.50 
                 (0.140, 0.074) 
                 110 
               
               
                 Ref 14 
                 1-12 
                 2-2 
                 4.21 
                 6.47 
                 (0.141, 0.074) 
                 103 
               
               
                 Ref 15 
                 1-13 
                 2-2 
                 4.20 
                 6.53 
                 (0.138, 0.080) 
                 102 
               
               
                 Ref 16 
                 1-17 
                 2-2 
                 4.19 
                 6.47 
                 (0.137, 0.079) 
                 96 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 2 
               
               
                   
               
               
                   
                 Dopant 
                 Host 
                 V 
                 EQE (%) 
                 CIE(x, y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                 Ref 17 
                 1-1 
                 2-3 
                 3.80 
                 6.21 
                 (0.140, 0.063) 
                 56 
               
               
                 Ref 18 
                 1-4 
                 2-3 
                 3.79 
                 6.17 
                 (0.130, 0.092) 
                 61 
               
               
                 Ref 19 
                 1-6 
                 2-3 
                 3.80 
                 6.45 
                 (0.139, 0.076) 
                 79 
               
               
                 Ref 20 
                 1-8 
                 2-3 
                 3.78 
                 6.47 
                 (0.138, 0.081) 
                 73 
               
               
                 Ref 21 
                 1-11 
                 2-3 
                 3.78 
                 6.46 
                 (0.141, 0.075) 
                 90 
               
               
                 Ref 22 
                 1-12 
                 2-3 
                 3.78 
                 6.44 
                 (0.141, 0.075) 
                 85 
               
               
                 Ref 23 
                 1-13 
                 2-3 
                 3.80 
                 6.49 
                 (0.136, 0.081) 
                 84 
               
               
                 Ref 24 
                 1-17 
                 2-3 
                 3.79 
                 6.42 
                 (0.136, 0.081) 
                 79 
               
               
                 Ref 25 
                 1-1 
                 2-4 
                 3.80 
                 6.22 
                 (0.139, 0.062) 
                 56 
               
               
                 Ref 26 
                 1-4 
                 2-4 
                 3.79 
                 6.20 
                 (0.131, 0.092) 
                 60 
               
               
                 Ref 27 
                 1-6 
                 2-4 
                 3.80 
                 6.43 
                 (0.137, 0.081) 
                 80 
               
               
                 Ref 28 
                 1-8 
                 2-4 
                 3.79 
                 6.42 
                 (0.136, 0.084) 
                 73 
               
               
                 Ref 29 
                 1-11 
                 2-4 
                 3.81 
                 6.47 
                 (0.139, 0.076) 
                 91 
               
               
                 Ref 30 
                 1-12 
                 2-4 
                 3.80 
                 6.44 
                 (0.139, 0.077) 
                 84 
               
               
                 Ref 31 
                 1-13 
                 2-4 
                 3.79 
                 6.50 
                 (0.136, 0.084) 
                 83 
               
               
                 Ref 32 
                 1-17 
                 2-4 
                 3.80 
                 6.43 
                 (0.135, 0.087) 
                 80 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 3 
               
               
                   
               
               
                   
                 Dopant 
                 Host 
                 V 
                 EQE (%) 
                 CIE(x, y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                 Ref 33 
                 1-1 
                 2-5 
                 3.65 
                 6.15 
                 (0.140, 0.064) 
                 51 
               
               
                 Ref 34 
                 1-4 
                 2-5 
                 3.61 
                 6.12 
                 (0.130, 0.094) 
                 55 
               
               
                 Ref 35 
                 1-6 
                 2-5 
                 3.62 
                 6.10 
                 (0.138, 0.082) 
                 75 
               
               
                 Ref 36 
                 1-8 
                 2-5 
                 3.60 
                 6.12 
                 (0.138, 0.085) 
                 68 
               
               
                 Ref 37 
                 1-11 
                 2-5 
                 3.62 
                 6.10 
                 (0.141, 0.080) 
                 86 
               
               
                 Ref 38 
                 1-12 
                 2-5 
                 3.63 
                 6.15 
                 (0.141, 0.080) 
                 79 
               
               
                 Ref 39 
                 1-13 
                 2-5 
                 3.62 
                 6.15 
                 (0.136, 0.085) 
                 78 
               
               
                 Ref 40 
                 1-17 
                 2-5 
                 3.63 
                 6.16 
                 (0.136, 0.088) 
                 75 
               
               
                 Ref 41 
                 1-1 
                 2-6 
                 3.65 
                 6.16 
                 (0.140, 0.064) 
                 50 
               
               
                 Ref 42 
                 1-4 
                 2-6 
                 3.60 
                 6.13 
                 (0.130, 0.094) 
                 54 
               
               
                 Ref 43 
                 1-6 
                 2-6 
                 3.61 
                 6.11 
                 (0.138, 0.082) 
                 76 
               
               
                 Ref 44 
                 1-8 
                 2-6 
                 3.59 
                 6.11 
                 (0.138, 0.085) 
                 69 
               
               
                 Ref 45 
                 1-11 
                 2-6 
                 3.61 
                 6.11 
                 (0.141, 0.080) 
                 85 
               
               
                 Ref 46 
                 1-12 
                 2-6 
                 3.62 
                 6.14 
                 (0.141, 0.080) 
                 80 
               
               
                 Ref 47 
                 1-13 
                 2-6 
                 3.61 
                 6.14 
                 (0.136, 0.085) 
                 79 
               
               
                 Ref 48 
                 1-17 
                 2-6 
                 3.62 
                 6.15 
                 (0.136, 0.088) 
                 76 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 4 
               
               
                   
               
               
                   
                 Dopant 
                 Host 
                 V 
                 EQE (%) 
                 CIE(x, y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Ex 1 
                 1-1 
                 2-7 
                 3.98 
                 6.28 
                 (0.140, 0.060) 
                 95 
               
               
                 Ex 2 
                 1-4 
                 2-7 
                 3.95 
                 6.30 
                 (0.131, 0.089) 
                 102 
               
               
                 Ex 3 
                 1-6 
                 2-7 
                 3.91 
                 6.57 
                 (0.140, 0.074) 
                 133 
               
               
                 Ex 4 
                 1-8 
                 2-7 
                 3.88 
                 6.59 
                 (0.137, 0.080) 
                 123 
               
               
                 Ex 5 
                 1-11 
                 2-7 
                 3.89 
                 6.60 
                 (0.139, 0.074) 
                 151 
               
               
                 Ex 6 
                 1-12 
                 2-7 
                 3.89 
                 6.54 
                 (0.140, 0.072) 
                 142 
               
               
                 Ex 7 
                 1-13 
                 2-7 
                 3.90 
                 6.62 
                 (0.137, 0.079) 
                 141 
               
               
                 Ex 8 
                 1-17 
                 2-7 
                 3.91 
                 6.55 
                 (0.137, 0.079) 
                 133 
               
               
                 Ex 9 
                 1-1 
                 2-8 
                 4.21 
                 6.19 
                 (0.140, 0.061) 
                 103 
               
               
                 Ex 10 
                 1-4 
                 2-8 
                 4.20 
                 6.20 
                 (0.131, 0.089) 
                 111 
               
               
                 Ex 11 
                 1-6 
                 2-8 
                 4.16 
                 6.47 
                 (0.139, 0.074) 
                 144 
               
               
                 Ex 12 
                 1-8 
                 2-8 
                 4.20 
                 6.48 
                 (0.137, 0.078) 
                 159 
               
               
                 Ex 13 
                 1-11 
                 2-8 
                 4.20 
                 6.45 
                 (0.140, 0.074) 
                 165 
               
               
                 Ex 14 
                 1-12 
                 2-8 
                 4.20 
                 6.32 
                 (0.141, 0.073) 
                 154 
               
               
                 Ex 15 
                 1-13 
                 2-8 
                 4.19 
                 6.51 
                 (0.138, 0.079) 
                 153 
               
               
                 Ex 16 
                 1-17 
                 2-8 
                 4.20 
                 6.33 
                 (0.137, 0.078) 
                 144 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 5 
               
               
                   
               
               
                   
                 Dopant 
                 Host 
                 V 
                 EQE (%) 
                 CIE(x, y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Ex 17 
                 1-1 
                 2-9 
                 3.81 
                 6.21 
                 (0.139, 0.062) 
                 84 
               
               
                 Ex 18 
                 1-4 
                 2-9 
                 3.80 
                 6.19 
                 (0.131, 0.092) 
                 90 
               
               
                 Ex 19 
                 1-6 
                 2-9 
                 3.79 
                 6.42 
                 (0.137, 0.081) 
                 120 
               
               
                 Ex 20 
                 1-8 
                 2-9 
                 3.78 
                 6.41 
                 (0.136, 0.084) 
                 109 
               
               
                 Ex 21 
                 1-11 
                 2-9 
                 3.80 
                 6.45 
                 (0.139, 0.076) 
                 136 
               
               
                 Ex 22 
                 1-12 
                 2-9 
                 3.81 
                 6.42 
                 (0.139, 0.077) 
                 126 
               
               
                 Ex 23 
                 1-13 
                 2-9 
                 3.80 
                 6.49 
                 (0.136, 0.084) 
                 124 
               
               
                 Ex 24 
                 1-17 
                 2-9 
                 3.80 
                 6.41 
                 (0.135, 0.087) 
                 120 
               
               
                 Ex 25 
                 1-1 
                 2-10 
                 3.80 
                 6.21 
                 (0.139, 0.062) 
                 84 
               
               
                 Ex 26 
                 1-4 
                 2-10 
                 3.79 
                 6.22 
                 (0.131, 0.092) 
                 90 
               
               
                 Ex 27 
                 1-6 
                 2-10 
                 3.80 
                 6.42 
                 (0.137, 0.081) 
                 120 
               
               
                 Ex 28 
                 1-8 
                 2-10 
                 3.79 
                 6.41 
                 (0.136, 0.084) 
                 109 
               
               
                 Ex 29 
                 1-11 
                 2-10 
                 3.81 
                 6.45 
                 (0.139, 0.076) 
                 136 
               
               
                 Ex 30 
                 1-12 
                 2-10 
                 3.80 
                 6.45 
                 (0.139, 0.077) 
                 126 
               
               
                 Ex 31 
                 1-13 
                 2-10 
                 3.79 
                 6.49 
                 (0.136, 0.084) 
                 124 
               
               
                 Ex 32 
                 1-17 
                 2-10 
                 3.80 
                 6.42 
                 (0.135, 0.087) 
                 120 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
             
               
                 TABLE 6 
               
               
                   
               
               
                   
                 Dopant 
                 Host 
                 V 
                 EQE (%) 
                 CIE(x, y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
            
               
                 Ex 33 
                 1-1 
                 2-11 
                 3.64 
                 6.14 
                 (0.140, 0.064) 
                 76 
               
               
                 Ex 34 
                 1-4 
                 2-11 
                 3.62 
                 6.11 
                 (0.130, 0.094) 
                 82 
               
               
                 Ex 35 
                 1-6 
                 2-11 
                 3.61 
                 6.09 
                 (0.138, 0.082) 
                 112 
               
               
                 Ex 36 
                 1-8 
                 2-11 
                 3.61 
                 6.11 
                 (0.138, 0.085) 
                 102 
               
               
                 Ex 37 
                 1-11 
                 2-11 
                 3.61 
                 6.11 
                 (0.141, 0.080) 
                 129 
               
               
                 Ex 38 
                 1-12 
                 2-11 
                 3.62 
                 6.14 
                 (0.141, 0.080) 
                 119 
               
               
                 Ex 39 
                 1-13 
                 2-11 
                 3.63 
                 6.13 
                 (0.136, 0.085) 
                 117 
               
               
                 Ex 40 
                 1-17 
                 2-11 
                 3.64 
                 6.15 
                 (0.136, 0.088) 
                 112 
               
               
                 Ex 41 
                 1-1 
                 2-12 
                 3.64 
                 6.15 
                 (0.140, 0.064) 
                 75 
               
               
                 Ex 42 
                 1-4 
                 2-12 
                 3.61 
                 6.14 
                 (0.130, 0.094) 
                 81 
               
               
                 Ex 43 
                 1-6 
                 2-12 
                 3.60 
                 6.12 
                 (0.138, 0.082) 
                 114 
               
               
                 Ex 44 
                 1-8 
                 2-12 
                 3.58 
                 6.12 
                 (0.138, 0.085) 
                 103 
               
               
                 Ex 45 
                 1-11 
                 2-12 
                 3.60 
                 6.12 
                 (0.141, 0.080) 
                 127 
               
               
                 Ex 46 
                 1-12 
                 2-12 
                 3.61 
                 6.13 
                 (0.141, 0.080) 
                 120 
               
               
                 Ex 47 
                 1-13 
                 2-12 
                 3.60 
                 6.15 
                 (0.136, 0.085) 
                 118 
               
               
                 Ex 48 
                 1-17 
                 2-12 
                 3.61 
                 6.14 
                 (0.136, 0.088) 
                 114 
               
               
                   
               
            
           
         
       
     
     As shown in Tables 1 to 6, in comparison to the OLEDs of Ref1 to Ref48, each of which includes a non-deuterated anthracene derivative, e.g., the compounds 2-1 to 2-6, as a host, the emitting efficiency and the lifespan of the OLEDs of Ex1 to Ex48, each of which includes a deuterated anthracene derivative, e.g., the compounds 2-7 to 2-12, as a host are significantly improved. 
     In addition, in comparison to the OLEDs of Ex17 to Ex48, the emitting efficiency and the lifespan of the OLEDs of Ex1 to Ex8, each of which includes the compound 2-7 as a host, and the OLEDs of Ex9 to Ex16, each of which includes the compound 2-8 as a host, are increased. Namely, when the anthracene derivative, in which one naphthalene moiety, i.e., 1-naphthyl, is directly connected to one side of the anthracene moiety and another naphthalene moiety, i.e., 2-naphthyl, is connected to the other side of the anthracene moiety directly or through a linker, being deuterated is included as a host, the emitting efficiency and the lifespan of the OLED are increased. 
     In comparison to the OLEDs of Ex1 to Ex8, each of which includes the compound 2-7 as a host, the OLEDs of Ex9 to Ex16, each of which includes the compound 2-8, provides sufficient lifespan. On the other hand, the driving voltage of the OLEDs of Ex1 to Ex8, each of which includes the compound 2-7, is lowered. Namely, when the anthracene derivative, in which one naphthalene moiety, i.e., 1-naphthyl, is directly connected to one side of the anthracene moiety and another naphthalene moiety, i.e., 2-naphthyl, is connected to the other side of the anthracene moiety directly or through a linker, being deuterated is included as a host, the OLED has advantages in all of the driving voltage, the emitting efficiency and the lifespan. 
     In addition, in comparison to the OLEDs, which includes the boron derivative, e.g., the compound 1-1 or 1-4, having the symmetric structure, the emitting efficiency and the lifespan of the OLED, which includes the boron derivative, e.g., the compound 1-6 or 1-8, having the asymmetric structure, are improved. 
     Moreover, in the OLED, which includes the boron derivative, e.g., the compound 1-11, 1-12, 1-13 or 1-17, having the asymmetric structure and being deuterated, the emitting efficiency and the lifespan are further improved. 
     Furthermore, when each of the HIL and the HTL includes the compound in Formula 5 and the EBL includes the compound in Formula 7, the properties of the OLED are improved. 
     [Organic Light Emitting Diode 2] 
     The anode (ITO, 0.5 mm), the HIL (Formula 12 (97 wt %) and Formula 13 (3 wt %), 100 Å), the HTL (Formula 12, 1000 Å), the EBL (100 Å), the EML (host (98 wt %) and dopant (2 wt %), 200 Å), the HBL (100 Å), the EIL (Formula 16 (98 wt %) and Li (2 wt %), 200 Å) and the cathode (Al, 500 Å) was sequentially deposited. An encapsulation film is formed by using an UV curable epoxy and a moisture getter to form the OLED. 
     3. COMPARATIVE EXAMPLES 
     (1) Comparative Example 49 (Ref49) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-1 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (2) Comparative Example 50 (Ref50) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-3 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (3) Comparative Example 51 (Ref51) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-1 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (4) Comparative Example 52 (Ref52) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-3 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (5) Comparative Example 53 (Ref53) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-1 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (6) Comparative Example 54 (Ref54) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-3 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (7) Comparative Example 55 (Ref55) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-1 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     (8) Comparative Example 56 (Ref56) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-3 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18 is used to form the HBL. 
     4. Examples 
     (1) Examples 49 to 51 (Ex49 to Ex51) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (2) Examples 52 to 54 (Ex52 to Ex54) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (3) Examples 55 to 57 (Ex55 to Ex57) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (4) Examples 58 to 60 (Ex58 to Ex60) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (5) Examples 61 to 63 (Ex61 to Ex63) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (6) Examples 64 to 66 (Ex64 to Ex66) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-6 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (7) Examples 67 to 69 (Ex67 to Ex69) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (8) Examples 70 to 72 (Ex70 to Ex72) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (9) Examples 73 to 75 (Ex73 to Ex75) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (10) Examples 76 to 78 (Ex76 to Ex78) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (11) Examples 79 to 81 (Ex79 to Ex81) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (12) Examples 82 to 84 (Ex82 to Ex84) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-8 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (13) Examples 85 to 87 (Ex85 to Ex87) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (14) Examples 88 to 90 (Ex88 to Ex90) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (15) Examples 91 to 93 (Ex91 to Ex93) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (16) Examples 94 to 96 (Ex94 to Ex96) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (17) Examples 97 to 99 (Ex97 to Ex99) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (18) Examples 100 to 102 (Ex100 to Ex102) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-11 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (19) Examples 103 to 105 (Ex103 to Ex105) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (20) Examples 106 to 108 (Ex106 to Ex108) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (21) Examples 109 to 111 (Ex109 to Ex111) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-7 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (22) Examples 112 to 114 (Ex112 to Ex114) 
     The compound “Ref. EBL” in Formula 17 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (23) Examples 115 to 117 (Ex115 to Ex117) 
     The compound EBL-1 in Formula 6 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref. HBL” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     (24) Examples 118 to 120 (Ex118 to Ex120) 
     The compound EBL-2 in Formula 6 is used to form the EBL, and the compound 1-13 in Formula 3 as the dopant and the compound 2-9 in Formula 4 as the host are used to form the EML. The compound “Ref” in Formula 18, the compound E1 (“HBL-1-1”) in Formula 8, the compound F1 (“HBL-2-1”) in Formula 10 are respectively used to form the HBL. 
     
       
         
         
             
             
         
       
     
     The properties, i.e., the driving voltage (V), the external quantum efficiency (EQE), the color coordinate (CIE) and the lifespan (T 95 ), of the OLEDs manufactured in Comparative Examples 49 to 56 and Examples 49 to 120 are measured and listed in Tables 7 to 14. 
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 7 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 49 
                 Ref. 
                 1-6 
                 2-1 
                 Ref. 
                 3.93 
                 3.11 
                 0.140 
                 0.076 
                 26 
               
               
                 Ex 49 
                 Ref. 
                 1-6 
                 2-7 
                 Ref. 
                 3.95 
                 3.09 
                 0.140 
                 0.075 
                 45 
               
               
                 Ex 50 
                 Ref. 
                 1-6 
                 2-7 
                 HBL-1-1 
                 3.95 
                 3.14 
                 0.141 
                 0.074 
                 54 
               
               
                 Ex 51 
                 Ref. 
                 1-6 
                 2-7 
                 HBL-2-1 
                 3.91 
                 3.19 
                 0.140 
                 0.075 
                 61 
               
               
                 Ex 52 
                 EBL-1 
                 1-6 
                 2-7 
                 Ref. 
                 3.96 
                 6.13 
                 0.140 
                 0.076 
                 122 
               
               
                 Ex 53 
                 EBL-1 
                 1-6 
                 2-7 
                 HBL-1-1 
                 3.91 
                 6.27 
                 0.140 
                 0.074 
                 161 
               
               
                 Ex 54 
                 EBL-1 
                 1-6 
                 2-7 
                 HBL-2-1 
                 3.91 
                 6.38 
                 0.140 
                 0.074 
                 190 
               
               
                 Ex 55 
                 EBL-2 
                 1-6 
                 2-7 
                 Ref. 
                 3.93 
                 6.45 
                 0.139 
                 0.077 
                 110 
               
               
                 Ex 56 
                 EBL-2 
                 1-6 
                 2-7 
                 HBL-1-1 
                 3.92 
                 6.58 
                 0.140 
                 0.074 
                 150 
               
               
                 Ex 57 
                 EBL-2 
                 1-6 
                 2-7 
                 HBL-2-1 
                 3.92 
                 6.70 
                 0.140 
                 0.074 
                 177 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 8 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 50 
                 Ref. 
                 1-6 
                 2-3 
                 Ref. 
                 3.82 
                 3.01 
                 0.139 
                 0.076 
                 28 
               
               
                 Ex 50 
                 Ref. 
                 1-6 
                 2-9 
                 Ref. 
                 3.84 
                 3.03 
                 0.138 
                 0.061 
                 38 
               
               
                 Ex 59 
                 Ref. 
                 1-6 
                 2-9 
                 HBL-1-1 
                 3.81 
                 3.09 
                 0.137 
                 0.080 
                 49 
               
               
                 Ex 60 
                 Ref. 
                 1-6 
                 2-9 
                 HBL-2-1 
                 3.82 
                 3.19 
                 0.138 
                 0.061 
                 58 
               
               
                 Ex 61 
                 EBL-1 
                 1-6 
                 2-9 
                 Ref. 
                 3.85 
                 6.05 
                 0.138 
                 0.081 
                 112 
               
               
                 Ex 62 
                 EBL-1 
                 1-6 
                 2-9 
                 HBL-1-1 
                 3.79 
                 6.13 
                 0.137 
                 0.061 
                 145 
               
               
                 Ex 63 
                 EBL-1 
                 1-6 
                 2-9 
                 HBL-2-1 
                 3.80 
                 6.31 
                 0.137 
                 0.082 
                 174 
               
               
                 Ex 64 
                 EBL-2 
                 1-6 
                 2-9 
                 Ref. 
                 3.83 
                 6.36 
                 0.138 
                 0.061 
                 106 
               
               
                 Ex 65 
                 EBL-2 
                 1-6 
                 2-9 
                 HBL-1-1 
                 3.79 
                 6.41 
                 0.138 
                 0.079 
                 136 
               
               
                 Ex 66 
                 EBL-2 
                 1-6 
                 2-9 
                 HBL-2-1 
                 3.80 
                 6.60 
                 0.137 
                 0.082 
                 169 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 9 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 51 
                 Ref. 
                 1-8 
                 2-1 
                 Ref. 
                 3.92 
                 3.12 
                 0.136 
                 0.081 
                 28 
               
               
                 Ex 67 
                 Ref. 
                 1-8 
                 2-7 
                 Ref. 
                 3.93 
                 3.08 
                 0.139 
                 0.082 
                 42 
               
               
                 Ex 68 
                 Ref. 
                 1-8 
                 2-7 
                 HBL-1-1 
                 3.87 
                 3.17 
                 0.137 
                 0.081 
                 50 
               
               
                 Ex 69 
                 Ref. 
                 1-8 
                 2-7 
                 HBL-2-1 
                 3.91 
                 3.22 
                 0.137 
                 0.082 
                 59 
               
               
                 Ex 70 
                 EBL-1 
                 1-8 
                 2-7 
                 Ref. 
                 3.92 
                 6.17 
                 0.138 
                 0.081 
                 119 
               
               
                 Ex 71 
                 EBL-1 
                 1-8 
                 2-7 
                 HBL-1-1 
                 3.88 
                 6.29 
                 0.137 
                 0.080 
                 149 
               
               
                 Ex 72 
                 EBL-1 
                 1-8 
                 2-7 
                 HBL-2-1 
                 3.89 
                 6.44 
                 0.137 
                 0.081 
                 175 
               
               
                 Ex 73 
                 EBL-2 
                 1-8 
                 2-7 
                 Ref. 
                 3.90 
                 6.48 
                 0.138 
                 0.081 
                 118 
               
               
                 Ex 74 
                 EBL-2 
                 1-8 
                 2-7 
                 HBL-1-1 
                 3.88 
                 6.67 
                 0.130 
                 0.081 
                 142 
               
               
                 Ex 75 
                 EBL-2 
                 1-8 
                 2-7 
                 HBL-2-1 
                 3.89 
                 6.72 
                 0.136 
                 0.082 
                 157 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 10 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 52 
                 Ref. 
                 1-3 
                 2-3 
                 Ref. 
                 3.80 
                 3.05 
                 0.137 
                 0.001 
                 27 
               
               
                 Ex 76 
                 Ref. 
                 1-8 
                 2-9 
                 Ref. 
                 3.81 
                 3.07 
                 0.138 
                 0.083 
                 36 
               
               
                 Ex 77 
                 Ref. 
                 1-8 
                 2-9 
                 HBL-1-1 
                 3.76 
                 3.06 
                 0.137 
                 0.083 
                 42 
               
               
                 Ex 78 
                 Ref. 
                 1-8 
                 2-9 
                 HBL-2-1 
                 3.80 
                 4.18 
                 0.137 
                 0.083 
                 52 
               
               
                 Ex 79 
                 EBL-1 
                 1-8 
                 2-9 
                 Ref. 
                 3.82 
                 6.05 
                 0.137 
                 0.083 
                 107 
               
               
                 Ex 80 
                 EBL-1 
                 1-8 
                 2-9 
                 HBL-1-1 
                 3.78 
                 6.12 
                 0.136 
                 0.084 
                 132 
               
               
                 Ex 81 
                 EBL-1 
                 1-8 
                 2-9 
                 HBL-2-1 
                 3.79 
                 6.30 
                 0.136 
                 0.084 
                 156 
               
               
                 Ex 82 
                 EBL-2 
                 1-8 
                 2-9 
                 Ref. 
                 3.84 
                 6.38 
                 0.137 
                 0.083 
                 102 
               
               
                 Ex 83 
                 EBL-2 
                 1-8 
                 2-9 
                 HBL-1-1 
                 3.76 
                 6.42 
                 0.136 
                 0.084 
                 129 
               
               
                 Ex 84 
                 EBL-2 
                 1-8 
                 2-9 
                 HBL-2-1 
                 3.81 
                 6.62 
                 0.136 
                 0.083 
                 144 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 11 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 53 
                 Ref. 
                 1-11 
                 2-1 
                 Ref. 
                 3.95 
                 3.08 
                 0.141 
                 0.076 
                 40 
               
               
                 Ex 85 
                 Ref. 
                 1-11 
                 2-7 
                 Ref. 
                 3.94 
                 3.04 
                 0,140 
                 0.074 
                 68 
               
               
                 Ex 86 
                 Ref. 
                 1-11 
                 2-7 
                 HPL-1-1 
                 3.94 
                 3.09 
                 0.140 
                 0.076 
                 80 
               
               
                 Ex 87 
                 Ref. 
                 1-11 
                 2-7 
                 HBL-2-1 
                 3.90 
                 3.14 
                 0.140 
                 0.076 
                 92 
               
               
                 Ex 88 
                 EEL-1 
                 1-11 
                 2-7 
                 Pet 
                 3.93 
                 6.10 
                 0.140 
                 0.076 
                 203 
               
               
                 Ex 89 
                 EBL-1 
                 1-11 
                 2-7 
                 HBL-1-1 
                 3.94 
                 6.18 
                 0.140 
                 0.076 
                 241 
               
               
                 Ex 90 
                 EBL-1 
                 1-11 
                 2-7 
                 HBL-2-1 
                 3.90 
                 6.28 
                 0.140 
                 0.076 
                 275 
               
               
                 Ex 91 
                 EBL-2 
                 1-11 
                 2-7 
                 Ref. 
                 3.93 
                 6.39 
                 0.140 
                 0.076 
                 165 
               
               
                 Ex 92 
                 EBL-2 
                 1-11 
                 2-7 
                 HBL-1-1 
                 3.92 
                 6.54 
                 0.139 
                 0.076 
                 225 
               
               
                 Ex 93 
                 EBL-2 
                 1-11 
                 2-7 
                 HBL-2-1 
                 3.91 
                 6.72 
                 0.140 
                 0.074 
                 266 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 12 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 54 
                 Ref. 
                 1-11 
                 2-3 
                 Ref. 
                 3.83 
                 2.99 
                 0.140 
                 0.077 
                 42 
               
               
                 Ex 94 
                 Ref. 
                 1-11 
                 2-9 
                 Ref. 
                 3.82 
                 2.98 
                 0.138 
                 0.083 
                 57 
               
               
                 Ex 95 
                 Ref. 
                 1-11 
                 2-9 
                 HBL-1-1 
                 3.82 
                 3.04 
                 0.137 
                 0.080 
                 74 
               
               
                 Ex 96 
                 Ref. 
                 1-11 
                 2-9 
                 HBL-2-1 
                 3.84 
                 3.20 
                 0.138 
                 0.023 
                 87 
               
               
                 Ex 97 
                 EBL-1 
                 1-11 
                 2-9 
                 Ref. 
                 3.82 
                 5.96 
                 0.138 
                 0.083 
                 171 
               
               
                 Ex 98 
                 EBL-1 
                 1-11 
                 2-9 
                 HBL-1-1 
                 3.82 
                 6.08 
                 0.137 
                 0.080 
                 221 
               
               
                 Ex 99 
                 EBL-1 
                 1-11 
                 2-9 
                 HBL-2-1 
                 3.85 
                 6.44 
                 0.138 
                 0.083 
                 261 
               
               
                 Ex 100 
                 EBL-2 
                 1-11 
                 2-9 
                 Ref. 
                 3.80 
                 6.40 
                 0.138 
                 0.081 
                 150 
               
               
                 Ex 101 
                 EBL-2 
                 1-11 
                 2-9 
                 HBL-1-1 
                 3.80 
                 6.27 
                 0.138 
                 0.079 
                 204 
               
               
                 Ex 102 
                 EBL-2 
                 1-11 
                 2-9 
                 HBL-2-1 
                 3.80 
                 6.54 
                 0.138 
                 0.076 
                 254 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 13 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 55 
                 Ref. 
                 1-13 
                 2-1 
                 Ref. 
                 3.90 
                 3.11 
                 0.138 
                 0.002 
                 42 
               
               
                 Ex 103 
                 Ref. 
                 1-13 
                 2-7 
                 Ref. 
                 3.95 
                 3.01 
                 0.139 
                 0.084 
                 63 
               
               
                 Ex 104 
                 Ref. 
                 1-13 
                 2-7 
                 HBL-1-1 
                 3.85 
                 3.14 
                 0.137 
                 0.083 
                 74 
               
               
                 Ex 105 
                 Bet. 
                 1-13 
                 2-7 
                 HBL-2-1 
                 3.93 
                 3.18 
                 0.137 
                 0.085 
                 89 
               
               
                 Ex 105 
                 EBL-1 
                 1-13 
                 2-7 
                 Ref. 
                 3.98 
                 5.02 
                 0.139 
                 0.082 
                 189 
               
               
                 Ex 107 
                 EBL-1 
                 1-13 
                 2-7 
                 HBL-1-1 
                 3.85 
                 6.28 
                 0.137 
                 0.083 
                 223 
               
               
                 Ex 103 
                 EBL-1 
                 1-13 
                 2-7 
                 HBL-2-1 
                 3.93 
                 6.36 
                 0.137 
                 0.085 
                 266 
               
               
                 Ex 109 
                 EBL-2 
                 1-13 
                 2-7 
                 Ref. 
                 3.92 
                 6.50 
                 0.138 
                 0.081 
                 177 
               
               
                 Ex 110 
                 EBL-2 
                 1-13 
                 2-7 
                 HBL-1-1 
                 3.88 
                 5.54 
                 0.138 
                 0.081 
                 213 
               
               
                 Ex 111 
                 EBL-2 
                 1-13 
                 2-7 
                 HBL-2-1 
                 3.90 
                 6.68 
                 0.136 
                 0.084 
                 250 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
               
               
               
               
             
               
                 TABLE 14 
               
               
                   
               
               
                   
                 EBL 
                 D 
                 H 
                 HBL 
                 V 
                 EQE (%) 
                 CIE(x) 
                 CIE(y) 
                 T 95  (hr) 
               
               
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
               
               
            
               
                 Ref 56 
                 Ref. 
                 1-13 
                 2-3 
                 Ref. 
                 3.94 
                 3.00 
                 0.137 
                 0.082 
                 41 
               
               
                 Ex 112 
                 Ref. 
                 1-13 
                 2-9 
                 Ref. 
                 3.82 
                 3.09 
                 0.139 
                 0.083 
                 53 
               
               
                 Ex 113 
                 Ref. 
                 1-13 
                 2-9 
                 HBL-1-1 
                 3.75 
                 8.03 
                 0.138 
                 0.083 
                 63 
               
               
                 Ex 114 
                 Ref. 
                 1-13 
                 2-9 
                 HBL-2-1 
                 3.32 
                 3.20 
                 0.137 
                 0.083 
                 73 
               
               
                 Ex 115 
                 EBL-1 
                 1-13 
                 2-9 
                 Ref. 
                 3.34 
                 6.18 
                 0.139 
                 0.083 
                 165 
               
               
                 Ex 116 
                 EBL-1 
                 1-13 
                 2-9 
                 HBL-1-1 
                 3.76 
                 6.06 
                 0.138 
                 0.083 
                 189 
               
               
                 Ex 117 
                 EBL-1 
                 1-13 
                 2-9 
                 HBL-2-1 
                 3.84 
                 6.40 
                 0.137 
                 0.083 
                 241 
               
               
                 Ex 118 
                 EBL-2 
                 1-13 
                 2-9 
                 Ref. 
                 3.85 
                 6.39 
                 0.137 
                 0.083 
                 161 
               
               
                 Ex 119 
                 EBL-2 
                 1-13 
                 2-9 
                 HBL-1-1 
                 3.78 
                 6.45 
                 0.136 
                 0.084 
                 201 
               
               
                 Ex 120 
                 EBL-2 
                 1-13 
                 2-9 
                 HBL-2-1 
                 3.82 
                 6.67 
                 0.137 
                 0.082 
                 222 
               
               
                   
               
            
           
         
       
     
     As shown in Tables 7 to 14, in comparison to the OLEDs of Ref49 to Ref56, each of which includes a non-deuterated anthracene derivative, e.g., the compounds 2-1 or 2-3, as a host, the emitting efficiency and the lifespan of the OLEDs of Ex49 to Ex120, each of which includes a deuterated anthracene derivative, e.g., the compounds 2-7 or 2-9, as a host are significantly improved. 
     In addition, in comparison to the OLEDs of Ex58 to Ex66, Ex76 to Ex84, Ex94 to Ex102 and Ex112 to Ex120, each of which includes the compound 2-9 as a host, the emitting efficiency and the lifespan of the OLEDs of Ex49 to Ex57, Ex67 to Ex75, Ex85 to Ex93 and Ex103 to Ex111, each of which includes the compound 2-7 as a host, are increased. Namely, when the anthracene derivative, in which one naphthalene moiety, i.e., 1-naphthyl, is directly connected to one side of the anthracene moiety and another naphthalene moiety, i.e., 2-naphthyl, is connected to the other side of the anthracene moiety directly or through a linker, being deuterated is included as a host, the emitting efficiency and the lifespan of the OLED are increased. 
     In addition, when the boron derivative, e.g., the compound 1-6, 1-8, 1-11 or 1-13, having the asymmetric structure is used as a dopant, the emitting efficiency and the lifespan of the OLED are improved. 
     Moreover, when the boron derivative, e.g., the compound 1-11, 1-12, 1-13 or 1-17, having the asymmetric structure and being deuterated is used as a dopant, the emitting efficiency and the lifespan of the OLED are further improved. 
     Furthermore, when the compound, e.g., the compound 1-6 or 1-11, in Formula 1-2, in which each of R 81  and R 82  is aryl (phenyl) substituted with alkyl (tert-butyl), is used as a dopant, the emitting efficiency and the lifespan of the OLED are further improved. 
     Further, when the HBL includes the compound in Formula 8 or the compound in Formula 10, the emitting efficiency and the lifespan of the OLED are improved. 
     Further, when the EBL includes the compound in Formula 6, the emitting efficiency and the lifespan of the OLED are significantly improved. 
     Further, with the compound 2-7 or 2-9 being the deuterated anthracene derivative and the compound 1-2 being the boron derivative in the EML, the compound in Formula 5 in the EBL and the compound in Formula 7 or 9 in the HBL, the emitting efficiency and the lifespan of the OLED are remarkably improved. 
       FIG. 4  is a schematic cross-sectional view illustrating an OLED having a tandem structure of two emitting parts according to the first embodiment of the present disclosure. 
     As shown in  FIG. 4 , the OLED D includes the first and second electrodes  160  and  164  facing each other and the organic emitting layer  162  between the first and second electrodes  160  and  164 . The organic emitting layer  162  includes a first emitting part  310  including a first EML  320 , a first EBL  316  and a first HBL  318 , a second emitting part  330  including a second EML  340 , a second EBL  334  and a second HBL  336 , and a charge generation layer (CGL)  350  between the first and second emitting parts  310  and  330 . The organic light emitting display device  100  (of  FIG. 2 ) includes red, green and blue pixels, and the OLED D may be positioned in the blue pixel. 
     One of the first and second electrodes  160  and  164  is an anode, and the other one of the first and second electrodes  160  and  164  is a cathode. One of the first and second electrodes  160  and  164  is a transparent electrode (or a semi-transparent electrode) electrode, and the other one of the first and second electrodes  160  and  164  is a reflection electrode. 
     The CGL  350  is positioned between the first and second emitting parts  310  and  330 , and the first emitting part  310 , the CGL  350  and the second emitting part  330  are sequentially stacked on the first electrode  160 . Namely, the first emitting part  310  is positioned between the first electrode  160  and the CGL  350 , and the second emitting part  330  is positioned between the second electrode  164  and the CGL  350 . 
     The first emitting part  310  may further include a first HTL  314  between the first electrode  160  and the first EBL  316  and an HIL  312  between the first electrode  160  and the first HTL  314 . 
     The first EML  320  includes a dopant  322  of the boron derivative and a host  324  of the deuterated anthracene derivative and emits blue light. Namely, at least one of hydrogens in the anthracene derivative is substituted with deuterium. The boron derivative is not deuterated, or a part of hydrogens in the boron derivative is substituted with deuterium. The dopant  322  may be represented by Formula 1-1 or 1-2 and may be one of the compounds in Formula 3. The host  324  may be represented by Formula 2 and may be one of the compounds in Formula 4. 
     In the first EML  320 , the host  324  may have a weight % of about 70 to 99.9, and the dopant  322  may have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency, the dopant  322  may have a weight % of about 0.1 to 10, preferably about 1 to 5. 
     The first EBL  316  may include the compound in Formula 5 as an electron blocking material  317 . The first HBL  318  may include at least one of the compound in Formula 7 and the compound in Formula 9 as a hole blocking material  319 . For example, the first HBL  318  may include both of the compound in formula 7 and the compound in Formula 9 with the same weight %. 
     The second emitting part  330  may further include a second HTL  332  between the CGL  350  and the second EBL  334  and an EIL  338  between the second HBL  336  and the second electrode  164 . 
     The second EML  340  includes a dopant  342  of the boron derivative and a host  344  of the deuterated anthracene derivative and emits blue light. Namely, at least one of hydrogens in the anthracene derivative is substituted with deuterium. The boron derivative is not deuterated, or a part of hydrogens in the boron derivative is substituted with deuterium. 
     In the second EML  340 , the host  344  may have a weight % of about 70 to 99.9, and the dopant  342  may have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency, the dopant  342  may have a weight % of about 0.1 to 10, preferably about 1 to 5. 
     The host  344  of the second EML  340  may be same as or different from the host  324  of the first EML  320 , and the dopant  342  of the second EML  340  may be same as or different from the dopant  322  of the first EML  320 . 
     The second EBL  334  may include the compound in Formula 5 as an electron blocking material  335 . The second HBL  336  may include at least one of the compound in Formula 7 and the compound in Formula 9 as a hole blocking material  337 . For example, the second HBL  336  may include both of the compound in Formula 7 and the compound in Formula 9 with the same weight %. 
     The CGL  350  is positioned between the first and second emitting parts  310  and  330 . Namely, the first and second emitting parts  310  and  330  are connected through the CGL  350 . The CGL  350  may be a P-N junction CGL of an N-type CGL  352  and a P-type CGL  354 . 
     The N-type CGL  352  is positioned between the first HBL  318  and the second HTL  332 , and the P-type CGL  354  is positioned between the N-type CGL  352  and the second HTL  332 . 
     In the OLED D, each of the first and second EMLs  320  and  340  includes the dopant  322  and  342 , which is the boron derivative, and the host  324  and  344 , which is the deuterated anthracene derivative. As a result, the OLED D and the organic light emitting display device  100  have advantages in the emitting efficiency and the lifespan. 
     When the boron derivative as the dopant  322  and  342  has an asymmetric structure as Formula 1-2, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     In addition, when the boron derivative as the dopant  322  and  342 , in which other aromatic ring and hetero-aromatic ring except a benzene ring being combined to boron atom and two nitrogen atoms are partially or wholly deuterated, is included, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     Moreover, when the anthracene derivative as the host  324  and  344  includes two naphthalene moieties connected to the anthracene moiety and is partially or wholly deuterated, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  100  including the anthracene derivative are further improved. 
     Furthermore, since at least one of the first and second EBLs  316  and  334  includes the compound in Formula 5 as the electron blocking material and each of the first and second HBLs  318  and  336  includes at least one of the compound in Formula 7 and the compound in Formula 9 as the hole blocking material, the lifespan of the OLED D and the organic light emitting display device  100  are further improved. 
     Further, since the first and second emitting parts  310  and  330  for emitting blue light are stacked, the organic light emitting display device  100  provides an image having high color temperature. 
       FIG. 5  is a schematic cross-sectional view illustrating an organic light emitting display device according to a second embodiment of the present disclosure, and  FIG. 6  is a schematic cross-sectional view illustrating an OLED having a tandem structure of two emitting parts according to the second embodiment of the present disclosure.  FIG. 7  is a schematic cross-sectional view illustrating an OLED having a tandem structure of three emitting parts according to the second embodiment of the present disclosure. 
     As shown in  FIG. 5 , the organic light emitting display device  400  includes a first substrate  410 , where a red pixel RP, a green pixel GP and a blue pixel BP are defined, a second substrate  470  facing the first substrate  410 , an OLED D, which is positioned between the first and second substrates  410  and  470  and providing white emission, and a color filter layer  480  between the OLED D and the second substrate  470 . 
     Each of the first and second substrates  410  and  470  may be a glass substrate or a flexible substrate. For example, the flexible substrate may be one of a polyimide (PI) substrate, polyethersulfone (PES), polyethylenenaphthalate (PEN), polyethylene terephthalate (PET) and polycarbonate (PC). 
     A buffer layer  420  is formed on the first substrate, and the TFT Tr corresponding to each of the red, green and blue pixels RP, GP and BP is formed on the buffer layer  420 . The buffer layer  420  may be omitted. 
     A semiconductor layer  422  is formed on the buffer layer  420 . The semiconductor layer  422  may include an oxide semiconductor material or polycrystalline silicon. 
     A gate insulating layer  424  is formed on the semiconductor layer  422 . The gate insulating layer  424  may be formed of an inorganic insulating material such as silicon oxide or silicon nitride. 
     A gate electrode  430 , which is formed of a conductive material, e.g., metal, is formed on the gate insulating layer  424  to correspond to a center of the semiconductor layer  422 . 
     An interlayer insulating layer  432 , which is formed of an insulating material, is formed on the gate electrode  430 . The interlayer insulating layer  432  may be formed of an inorganic insulating material, e.g., silicon oxide or silicon nitride, or an organic insulating material, e.g., benzocyclobutene or photo-acryl. 
     The interlayer insulating layer  432  includes first and second contact holes  434  and  436  exposing both sides of the semiconductor layer  422 . The first and second contact holes  434  and  436  are positioned at both sides of the gate electrode  430  to be spaced apart from the gate electrode  430 . 
     A source electrode  440  and a drain electrode  442 , which are formed of a conductive material, e.g., metal, are formed on the interlayer insulating layer  432 . 
     The source electrode  440  and the drain electrode  442  are spaced apart from each other with respect to the gate electrode  430  and respectively contact both sides of the semiconductor layer  422  through the first and second contact holes  434  and  436 . 
     The semiconductor layer  422 , the gate electrode  430 , the source electrode  440  and the drain electrode  442  constitute the TFT Tr. The TFT Tr serves as a driving element. Namely, the TFT Tr may correspond to the driving TFT Td (of  FIG. 1 ). 
     Although not shown, the gate line and the data line cross each other to define the pixel, and the switching TFT is formed to be connected to the gate and data lines. The switching TFT is connected to the TFT Tr as the driving element. 
     In addition, the power line, which may be formed to be parallel to and spaced apart from one of the gate and data lines, and the storage capacitor for maintaining the voltage of the gate electrode of the TFT Tr in one frame may be further formed. 
     A passivation layer (or a planarization layer)  450 , which includes a drain contact hole  452  exposing the drain electrode  442  of the TFT Tr, is formed to cover the TFT Tr. 
     A first electrode  460 , which is connected to the drain electrode  442  of the TFT Tr through the drain contact hole  452 , is separately formed in each pixel and on the passivation layer  450 . The first electrode  460  may be an anode and may be formed of a conductive material, e.g., a transparent conductive oxide (TCO), having a relatively high work function. For example, the first electrode  460  may be formed of indium-tin-oxide (ITO), indium-zinc-oxide (IZO), indium-tin-zinc-oxide (ITZO), tin oxide (SnO), zinc oxide (ZnO), indium-copper-oxide (ICO) or aluminum-zinc-oxide (Al:ZnO, AZO). 
     When the organic light emitting display device  400  is operated in a bottom-emission type, the first electrode  460  may have a single-layered structure of the transparent conductive oxide. When the organic light emitting display device  400  is operated in a top-emission type, a reflection electrode or a reflection layer may be formed under the first electrode  460 . For example, the reflection electrode or the reflection layer may be formed of silver (Ag) or aluminum-palladium-copper (APC) alloy. In this instance, the first electrode  460  may have a triple-layered structure of ITO/Ag/ITO or ITO/APC/ITO. 
     A bank layer  466  is formed on the passivation layer  450  to cover an edge of the first electrode  460 . Namely, the bank layer  466  is positioned at a boundary of the pixel and exposes a center of the first electrode  460  in the pixel. Since the OLED D emits the white light in the red, green and blue pixels RP, GP and BP, the organic emitting layer  462  may be formed as a common layer in the red, green and blue pixels RP, GP and BP without separation. The bank layer  466  may be formed to prevent a current leakage at an edge of the first electrode  460  and may be omitted. 
     An organic emitting layer  462  is formed on the first electrode  460 . 
     Referring to  FIG. 6 , the OLED D includes the first and second electrodes  460  and  464  facing each other and the organic emitting layer  462  between the first and second electrodes  460  and  464 . The organic emitting layer  462  includes a first emitting part  710  including a first EML  720 , a first EBL  716  and a first HBL  718 , a second emitting part  730  including a second EML  740 , a second EBL  734  and a second HBL  736 , and a charge generation layer (CGL)  750  between the first and second emitting parts  710  and  730 . 
     The CGL  750  is positioned between the first and second emitting parts  710  and  730 , and the first emitting part  710 , the CGL  750  and the second emitting part  730  are sequentially stacked on the first electrode  460 . Namely, the first emitting part  710  is positioned between the first electrode  460  and the CGL  750 , and the second emitting part  730  is positioned between the second electrode  464  and the CGL  750 . 
     The first emitting part  710  may further include a first HTL  714  between the first electrode  460  and the first EBL  716  and an HIL  712  between the first electrode  460  and the first HTL  714 . 
     The first EML  720  includes a dopant  722  of the boron derivative and a host  724  of the deuterated anthracene derivative and emits blue light. Namely, at least one of hydrogens in the anthracene derivative is substituted with deuterium. The boron derivative is not deuterated, or a part of hydrogens in the boron derivative is substituted with deuterium. The dopant  722  may be represented by Formula 1-1 or 1-2 and may be one of the compounds in Formula 3. The host  724  may be represented by Formula 2 and may be one of the compounds in Formula 4. 
     In the first EML  720 , the host  724  may have a weight % of about 70 to 99.9, and the dopant  722  may have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency, the dopant  722  may have a weight % of about 0.1 to 10, preferably about 1 to 5. 
     The first EBL  716  may include the compound in Formula 5 as an electron blocking material  717 . The first HBL  718  may include at least one of the compound in Formula 7 and the compound in Formula 9 as a hole blocking material  719 . For example, the first HBL  718  may include both of the compound in formula 7 and the compound in Formula 9 with the same weight %. 
     The second emitting part  730  may further include a second HTL  732  between the CGL  750  and the second EBL  734  and an EIL  738  between the second HBL  736  and the second electrode  464 . 
     The second EML  740  may be a yellow-green EML. For example, the second EML  740  may include a yellow-green dopant  743  and a host  745 . The yellow-green dopant  743  may be one of a fluorescent compound, a phosphorescent compound and a delayed fluorescent compound. 
     In the second EML  740 , the host  745  may have a weight % of about 70 to 99.9, and the yellow-green dopant  743  may have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency, the yellow-green dopant  743  may have a weight % of about 0.1 to 10, preferably about 1 to 5. 
     The second EBL  734  may include the compound in Formula 5 as an electron blocking material  735 . The second HBL  736  may include at least one of the compound in Formula 7 and the compound in Formula 9 as a hole blocking material  737 . For example, the second HBL  736  may include both of the compound in formula 7 and the compound in Formula 9 with the same weight %. 
     The CGL  750  is positioned between the first and second emitting parts  710  and  730 . Namely, the first and second emitting parts  710  and  730  are connected through the CGL  750 . The CGL  750  may be a P-N junction CGL of an N-type CGL  752  and a P-type CGL  754 . 
     The N-type CGL  752  is positioned between the first HBL  718  and the second HTL  732 , and the P-type CGL  754  is positioned between the N-type CGL  752  and the second HTL  732 . 
     In  FIG. 6 , the first EML  720 , which is positioned between the first electrode  460  and the CGL  750 , includes the host  722  of the anthracene derivative and the dopant  724  of the boron derivative, and the second EML  740 , which is positioned between the second electrode  464  and the CGL  750 , is the yellow-green EML. Alternatively, the first EML  720 , which is positioned between the first electrode  460  and the CGL  750 , may be the yellow-green EML, and the second EML  740 , which is positioned between the second electrode  464  and the CGL  750 , may include the host of the anthracene derivative and the dopant of the boron derivative to be a blue EML. 
     In the OLED D, the first EML  720  includes the dopant  722 , each of which is the boron derivative, and the host  724 , each of which is the deuterated anthracene derivative. As a result, the OLED D and the organic light emitting display device  400  have advantages in the emitting efficiency and the lifespan. 
     When the boron derivative as the dopant  722  has an asymmetric structure as Formula 1-2, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  400  are further improved. 
     In addition, when the boron derivative as the dopant  722 , in which other aromatic ring and hetero-aromatic ring except a benzene ring being combined to boron atom and two nitrogen atoms are partially or wholly deuterated, is included, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  400  are further improved. 
     Moreover, when the anthracene derivative as the host  724  includes two naphthalene moieties connected to the anthracene moiety and is partially or wholly deuterated, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  400  including the anthracene derivative are further improved. 
     Furthermore, since at least one of the first and second EBLs  716  and  734  includes the compound in Formula 5 as the electron blocking material and each of the first and second HBLs  718  and  736  includes at least one of the compound in Formula 7 and the compound in Formula 9 as the hole blocking material, the lifespan of the OLED D and the organic light emitting display device  400  are further improved. 
     Further, the OLED D including the first emitting part  710  and the second emitting part  730 , which provides a yellow-green emission, emits a white light. 
     Referring to  FIG. 7 , the organic emitting layer  462  includes a first emitting part  530  including a first EML  520 , a first EBL  536  and a first HBL  538 , a second emitting part  550  including a second EML  540 , a third emitting part  570  including a third EML  560 , a second EBL  574  and a second HBL  576 , a first CGL  580  between the first and second emitting parts  530  and  550 , and a second CGL  590  between the second and third emitting parts  550  and  570 . 
     The first CGL  580  is positioned between the first and second emitting parts  530  and  550 , and the second CGL  590  is positioned between the second and third emitting parts  550  and  570 . Namely, the first emitting part  530 , the first CGL  580 , the second emitting part  550 , the second CGL  590  and the third emitting part  570  are sequentially stacked on the first electrode  460 . In other words, the first emitting part  530  is positioned between the first electrode  460  and the first CGL  580 , the second emitting part  550  is positioned between the first and second CGLs  580  and  590 , and the third emitting part  570  is positioned between the second electrode  464  and the second CGL  590 . 
     The first emitting part  530  may include at least one of a first HTL  534  between the first electrode  460  and the first EBL  536  and an HIL  532  between the first electrode  460  and the first HTL  534 . For example, the HIL  532 , the first HTL  534  and the first EBL  536  may be sequentially stacked between the first electrode  460  and the first EML  520 , and the first HBL  538  may be positioned between the first EML  520  and the first CGL  580 . 
     The first EML  520  includes a dopant  522  of the boron derivative and a host  524  of the deuterated anthracene derivative and emits blue light. Namely, at least one of hydrogens in the anthracene derivative is substituted with deuterium. The boron derivative is not deuterated, or a part of hydrogens in the boron derivative is substituted with deuterium. The dopant  522  may be represented by Formula 1-1 or 1-2 and may be one of the compounds in Formula 3. The host  524  may be represented by Formula 2 and may be one of the compounds in Formula 4. 
     In the first EML  520 , the host  524  may have a weight % of about 70 to 99.9, and the dopant  522  may have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency, the dopant  522  may have a weight % of about 0.1 to 10, preferably about 1 to 5. 
     The first EBL  536  may include the compound in Formula 5 as an electron blocking material  537 . The first HBL  538  may include at least one of the compound in Formula 7 and the compound in Formula 9 as a hole blocking material  539 . For example, the first HBL  538  may include both of the compound in Formula 7 and the compound in Formula 9 with the same weight %. 
     The second emitting part  550  may further include a second HTL  552  and an electron transporting layer (ETL)  554 . The second HTL  552  is positioned between the first CGL  580  and the second EML  540 , and the ETL  554  is positioned between the second EML  540  and the second CGL  590 . 
     The second EML  540  may be a yellow-green EML. For example, the second EML  540  may include a host and a yellow-green dopant. 
     Alternatively, the second EML  540  may include a host, a red dopant and a green dopant. In this instance, the second EML  540  may have a single-layered structure, or may have a double-layered structure of a lower layer including the host and the red dopant (or the green dopant) and an upper layer including the host and the green dopant (or the red dopant). 
     The second EML  540  may have a triple-layered structure of a first layer, which includes a host and a red dopant, a second layer, which includes a host and a yellow-green dopant, and a third layer, which includes a host and a green dopant. 
     The third emitting part  570  may further include at least one of a third HTL  572  under the second EBL  574  and an EIL  578  over the second HBL  576 . 
     The third EML  560  includes a dopant  562  of the boron derivative and a host  564  of the deuterated anthracene derivative and emits blue light. Namely, at least one of hydrogens in the anthracene derivative is substituted with deuterium. The boron derivative is not deuterated, or a part of hydrogens in the boron derivative is substituted with deuterium. The dopant  562  may be represented by Formula 1-1 or 1-2 and may be one of the compounds in Formula 3. The host  564  may be represented by Formula 2 and may be one of the compounds in Formula 4. 
     In the third EML  560 , the host  564  may have a weight % of about 70 to 99.9, and the dopant  562  may have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency, the dopant  562  may have a weight % of about 0.1 to 10, preferably about 1 to 5. 
     The host  564  of the third EML  560  may be same as or different from the host  524  of the first EML  520 , and the dopant  562  of the third EML  560  may be same as or different from the dopant  522  of the first EML  520 . 
     The second EBL  574  may include the compound in Formula 5 as an electron blocking material  575 . The second HBL  576  may include at least one of the compound in Formula 7 and the compound in Formula 9 as a hole blocking material  577 . For example, the second HBL  576  may include both of the compound in formula 7 and the compound in Formula 9 with the same weight %. 
     The first CGL  580  is positioned between the first emitting part  530  and the second emitting part  550 , and the second CGL  590  is positioned between the second emitting part  550  and the third emitting part  570 . Namely, the first and second emitting parts  530  and  550  are connected through the first CGL  580 , and the second and third emitting parts  550  and  570  are connected through the second CGL  590 . The first CGL  580  may be a P-N junction CGL of a first N-type CGL  582  and a first P-type CGL  584 , and the second CGL  590  may be a P-N junction CGL of a second N-type CGL  592  and a second P-type CGL  594 . 
     In the first CGL  580 , the first N-type CGL  582  is positioned between the first HBL  538  and the second HTL  552 , and the first P-type CGL  584  is positioned between the first N-type CGL  582  and the second HTL  552 . 
     In the second CGL  590 , the second N-type CGL  592  is positioned between the ETL  554  and the third HTL  572 , and the second P-type CGL  594  is positioned between the second N-type CGL  592  and the third HTL  572 . 
     In the OLED D, each of the first and third EMLs  520  and  560  includes the dopant  522  and  562 , each of which is the boron derivative and the host  524  and  564 , each of which is the deuterated anthracene derivative. As a result, the OLED D and the organic light emitting display device  400  have advantages in the emitting efficiency and the lifespan. 
     When the boron derivative as the dopant  522  and  562  has an asymmetric structure as Formula 1-2, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  400  are further improved. 
     In addition, when the boron derivative as the dopant  522  and  562 , in which other aromatic ring and hetero-aromatic ring except a benzene ring being combined to boron atom and two nitrogen atoms are partially or wholly deuterated, is included, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  400  are further improved. 
     Moreover, when the anthracene derivative as the host  524  and  564  includes two naphthalene moieties connected to the anthracene moiety and is partially or wholly deuterated, the emitting efficiency and the lifespan of the OLED D and the organic light emitting display device  400  including the anthracene derivative are further improved. 
     Furthermore, since at least one of the first and second EBLs  536  and  574  includes the compound in Formula 5 as the electron blocking material and each of the first and second HBLs  538  and  576  includes at least one of the compound in Formula 7 and the compound in Formula 9 as the hole blocking material, the lifespan of the OLED D and the organic light emitting display device  400  are further improved. 
     Further, the OLED D including the first and third emitting parts  530  and  570  with the second emitting part  550 , which emits yellow-green light or red/green light, can emit white light. 
     In  FIG. 7 , the OLED D has a triple-stack structure of the first, second and third emitting parts  530 ,  550 , and  570 . Alternatively, the OLED D may further include additional emitting part and CGL. 
     Referring to  FIG. 5  again, a second electrode  464  is formed over the substrate  410  where the organic emitting layer  462  is formed. 
     In the organic light emitting display device  400 , since the light emitted from the organic emitting layer  462  is incident to the color filter layer  480  through the second electrode  464 , the second electrode  464  has a thin profile for transmitting the light. 
     The first electrode  460 , the organic emitting layer  462  and the second electrode  464  constitute the OLED D. 
     The color filter layer  480  is positioned over the OLED D and includes a red color filter  482 , a green color filter  484  and a blue color filter  486  respectively corresponding to the red, green and blue pixels RP, GP and BP. The red color filter  482  may include at least one of red dye and red pigment, the green color filter  484  may include at least one of green dye and green pigment, and the blue color filter  486  may include at least one of blue dye and blue pigment. 
     Although not shown, the color filter layer  480  may be attached to the OLED D by using an adhesive layer. Alternatively, the color filter layer  480  may be formed directly on the OLED D. 
     An encapsulation film (not shown) may be formed to prevent penetration of moisture into the OLED D. For example, the encapsulation film may include a first inorganic insulating layer, an organic insulating layer and a second inorganic insulating layer sequentially stacked, but it is not limited thereto. The encapsulation film may be omitted. 
     A polarization plate (not shown) for reducing an ambient light reflection may be disposed over the top-emission type OLED D. For example, the polarization plate may be a circular polarization plate. 
     In the OLED of  FIG. 5 , the first and second electrodes  460  and  464  are a reflection electrode and a transparent (or semi-transparent) electrode, respectively, and the color filter layer  480  is disposed over the OLED D. Alternatively, when the first and second electrodes  460  and  464  are a transparent (or semi-transparent) electrode and a reflection electrode, respectively, the color filter layer  480  may be disposed between the OLED D and the first substrate  410 . 
     A color conversion layer (not shown) may be formed between the OLED D and the color filter layer  480 . The color conversion layer may include a red color conversion layer, a green color conversion layer and a blue color conversion layer respectively corresponding to the red, green and blue pixels RP, GP and BP. The white light from the OLED D is converted into the red light, the green light and the blue light by the red, green and blue color conversion layer, respectively. For example, the color conversion layer may include a quantum dot. Accordingly, the color purity of the organic light emitting display device  400  may be further improved. 
     The color conversion layer may be included instead of the color filter layer  480 . 
     As described above, in the organic light emitting display device  400 , the OLED D in the red, green and blue pixels RP, GP and BP emits the white light, and the white light from the organic light emitting diode D passes through the red color filter  482 , the green color filter  484  and the blue color filter  486 . As a result, the red light, the green light and the blue light are provided from the red pixel RP, the green pixel GP and the blue pixel BP, respectively. 
     In  FIGS. 5 to 7 , the OLED D emitting the white light is used for a display device. Alternatively, the OLED D may be formed on an entire surface of a substrate without at least one of the driving element and the color filter layer to be used for a lightening device. The display device and the lightening device each including the OLED D of the present disclosure may be referred to as an organic light emitting device. 
       FIG. 8  is a schematic cross-sectional view illustrating an organic light emitting display device according to a third embodiment of the present disclosure. 
     As shown in  FIG. 8 , the organic light emitting display device  600  includes a first substrate  610 , where a red pixel RP, a green pixel GP and a blue pixel BP are defined, a second substrate  670  facing the first substrate  610 , an OLED D, which is positioned between the first and second substrates  610  and  670  and providing white emission, and a color conversion layer  680  between the OLED D and the second substrate  670 . 
     Although not shown, a color filter may be formed between the second substrate  670  and each color conversion layer  680 . 
     Each of the first and second substrates  610  and  670  may be a glass substrate or a flexible substrate. For example, the flexible substrate may be one of a polyimide (PI) substrate, polyethersulfone (PES), polyethylenenaphthalate (PEN), polyethylene terephthalate (PET) and polycarbonate (PC). 
     A TFT Tr, which corresponding to each of the red, green and blue pixels RP, GP and BP, is formed on the first substrate  610 , and a passivation layer  650 , which has a drain contact hole  652  exposing an electrode, e.g., a drain electrode, of the TFT Tr is formed to cover the TFT Tr. 
     The OLED D including a first electrode  660 , an organic emitting layer  662  and a second electrode  664  is formed on the passivation layer  650 . In this instance, the first electrode  660  may be connected to the drain electrode of the TFT Tr through the drain contact hole  652 . 
     A bank layer  666  is formed on the passivation layer  650  to cover an edge of the first electrode  660 . Namely, the bank layer  666  is positioned at a boundary of the pixel and exposes a center of the first electrode  660  in the pixel. Since the OLED D emits the blue light in the red, green and blue pixels RP, GP and BP, the organic emitting layer  662  may be formed as a common layer in the red, green and blue pixels RP, GP and BP without separation. The bank layer  666  may be formed to prevent a current leakage at an edge of the first electrode  660  and may be omitted. 
     The OLED D emits a blue light and may have a structure shown in  FIG. 3  or  FIG. 4 . Namely, the OLED D is formed in each of the red, green and blue pixels RP, GP and BP and provides the blue light. 
     The color conversion layer  680  includes a first color conversion layer  682  corresponding to the red pixel RP and a second color conversion layer  684  corresponding to the green pixel GP. For example, the color conversion layer  680  may include an inorganic color conversion material such as a quantum dot. The color conversion layer  680  is not presented in the blue pixel BP such that the OLED D in the blue pixel may directly face the second electrode  670 . 
     The blue light from the OLED D is converted into the red light by the first color conversion layer  682  in the red pixel RP, and the blue light from the OLED D is converted into the green light by the second color conversion layer  684  in the green pixel GP. 
     Accordingly, the organic light emitting display device  600  can display a full-color image. 
     On the other hand, when the light from the OLED D passes through the first substrate  610 , the color conversion layer  680  is disposed between the OLED D and the first substrate  610 . 
     It will be apparent to those skilled in the art that various modifications and variations can be made in the embodiments of the present disclosure without departing from the spirit or scope of the present disclosure. Thus, it is intended that the modifications and variations cover this disclosure provided they come within the scope of the appended claims and their equivalents.