Patent Publication Number: US-2022223793-A1

Title: Organic light emitting diode and organic light emitting device including the same

Description:
CROSS-REFERENCE TO RELATED APPLICATIONS 
     This application is a U.S. National Phase of PCT/KR2020/018950, filed Dec. 23, 2020, which claims priority to Korean Patent Application No. 10-2019-0178653 filed in the Republic of Korea on Dec. 30, 2019, the entire contents of all of these applications being expressly incorporated by reference into the present application. 
    
    
     TECHNICAL FIELD 
     The present disclosure relates to an organic light emitting diode (OLED), and more specifically, to an OLED having enhanced emitting efficiency and lifespan and an organic light emitting device including the same. 
     BACKGROUND ART 
     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 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 can include a red pixel region, a green pixel region and a blue pixel region, and the OLED can 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. 
     DISCLOSURE 
     Technical Problem 
     Accordingly, 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 due to the limitations and disadvantages of the related art. 
     An object of the present disclosure is to provide an OLED having enhanced emitting efficiency and lifespan and an organic light emitting device including the same. 
     Additional features and advantages of the disclosure will be set forth in the description which follows, and in part will be apparent from the description, or can be learned by practice of the disclosure. The objectives and other advantages of the disclosure will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings. 
     Technical Solution 
     According to an aspect, the present disclosure provides an OLED that includes a first electrode; a second electrode facing the first electrode; and a first emitting material layer including a first host being an anthracene derivative and a first dopant being a pyrene derivative and positioned between the first and second electrodes, wherein at least one of an anthracene core of the first host and a pyrene core of the first dopant is deuterated. 
     As an example, all of the hydrogen atoms in at least one of the anthracene derivative and the pyrene derivative are deuterated. 
     As an example, at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. 
     The OLED can include a single emitting part or a tandem structure of a multiple emitting parts. 
     The tandem-structured OLED can emit blue color or white color light. 
     According to another aspect, the present disclosure provides an organic light emitting device comprising the OLED, as described above. 
     For example, the organic light emitting device can be an organic light emitting display device or a lightening device. 
     It is to be understood that both the foregoing general description and the following detailed description are examples and are explanatory and are intended to provide further explanation of the disclosure as claimed. 
     Advantageous Effects 
     An emitting material layer of an OLED of the present disclosure includes a host of an anthracene derivative and a dopant of a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. As a result, an emitting efficiency and a lifespan of the OLED and an organic light emitting device including the OLED are improved with minimizing production cost increase. 
    
    
     
       DESCRIPTION OF DRAWINGS 
       The accompanying drawings, which are included to provide a further understanding of the disclosure, are incorporated in and constitute a part of this specification, illustrate implementations of the disclosure and together with the description serve to explain the principles of embodiments of the 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 for the organic light emitting display device according to the second embodiment of the present disclosure. 
         FIG. 7  is a schematic cross-sectional view illustrating an organic light emitting display device according to a third embodiment of the present disclosure. 
     
    
    
     DETAILED DESCRIPTION OF THE EMBODIMENTS 
     Reference will now be made in detail to aspects of the disclosure, examples of 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 region P. The pixel region P can 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 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 Tr. 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 charge 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  can include a red pixel, a green pixel and a blue pixel, and the OLED D can be formed in each of the red, green and blue pixels. Namely, the OLEDs D emitting red light, green light and blue light can be provided in the red, green and blue pixels, respectively. 
     The substrate  110  can be a glass substrate or a plastic substrate. For example, the substrate  110  can be a polyimide substrate. 
     A buffer layer  120  is formed on the substrate, and the TFT Tr is formed on the buffer layer  120 . The buffer layer  120  can be omitted. 
     A semiconductor layer  122  is formed on the buffer layer  120 . The semiconductor layer  122  can include an oxide semiconductor material or polycrystalline silicon. 
     When the semiconductor layer  122  includes the oxide semiconductor material, a light-shielding pattern can 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 can 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  can 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  can 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  can 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  is 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 can 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 can be positioned under the semiconductor layer, and the source and drain electrodes can be positioned over the semiconductor layer such that the TFT Tr can have an inverted staggered structure. In this instance, the semiconductor layer can include amorphous silicon. 
     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 can 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 can be further formed. 
     A passivation 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. The first electrode  160  can be an anode and can be formed of a conductive material having a relatively high work function. For example, the first electrode  160  can be formed of a transparent conductive material such as indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). 
     When the OLED device  100  is operated in a top-emission type, a reflection electrode or a reflection layer can be formed under the first electrode  160 . For example, the reflection electrode or the reflection layer can be formed of aluminum-palladium-copper (APC) alloy. 
     A bank layer  166  is formed on the passivation 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  can have a single-layered structure of an emitting material layer including an emitting material. To increase an emitting efficiency of the OLED D and/or the organic light emitting display device  100 , the organic emitting layer  162  can have a multi-layered structure. 
     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 and a dopant of a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. As a result, the emitting efficiency and the lifespan of the OLED D in the blue pixel are improved. 
     A 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 can be formed of a conductive material having a relatively low work function to serve as a cathode. For example, the second electrode  164  can be formed of aluminum (Al), magnesium (Mg), silver (Ag), Al—Mg alloy (AlMg) or Mg—Ag alloy (MgAg). 
     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  can be omitted. 
     A polarization plate for reducing an ambient light reflection can be disposed over the top-emission type OLED D. For example, the polarization plate can be a circular polarization plate. 
     In addition, a cover window can 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 display device can be provided. 
       FIG. 3  is a schematic cross-sectional view illustrating an OLED having a single emitting unit 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 and second electrodes  160  and  164 , which face each other, and the organic emitting layer  162  therebetween. The organic emitting layer  162  includes an emitting material layer (EML)  240  between the first and second electrodes  160  and  164 . 
     The first electrode  160  can be formed of a conductive material having a relatively high work function to serve as an anode. The second electrode  164  can be formed of a conductive material having a relatively low work function to serve as a cathode. One of the first and second electrodes  160  and  164  is a transparent electrode (or a semi-transparent electrode), and the other one of the first and second electrodes  160  and  164  is a reflective electrode. 
     The organic emitting layer  162  can further include an electron blocking layer (EBL)  230  between the first electrode  160  and the EML  240  and a hole blocking layer (HBL)  250  between the EML  240  and the second electrode  164 . 
     In addition, the organic emitting layer  162  can further include a hole transporting layer (HTL)  220  between the first electrode  160  and the EBL  230 . 
     Moreover, the organic emitting layer  162  can 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 . 
     In the OLED D of the present disclosure, the HBL  250  can include a hole blocking material of an azine derivative. The hole blocking material has an electron transporting property such that an electron transporting layer can be omitted. The HBL  250  directly contacts the EIL  260 . Alternatively, the HBL can directly contact the second electrode without the EIL  260 . However, an electron transporting layer can be formed between the HBL  250  and the EIL  260 . 
     The organic emitting layer  162 , e.g., the EML  240 , includes the host  242  of an anthracene derivative, the dopant  244  of a pyrene derivative and provides blue emission. In this case, at least one of an anthracene core of the anthracene derivative  242  and a pyrene core of the pyrene derivative  244  is deuterated. 
     In the EML  240 , when the anthracene core of the host  242  is deuterated (e.g., “core-deuterated anthracene derivative”), the dopant  244  can be non-deuterated (e.g., “non-deuterated pyrene derivative”) or all of the pyrene core and a substituent of the dopant  244  can be deuterated (e.g., “wholly-deuterated pyrene derivative”). Alternatively, the pyrene core of the dopant  244  except the substituent can be deuterated (e.g., “core-deuterated pyrene derivative”), or the substituent of the dopant  244  except the pyrene core can be deuterated (e.g., “substituent-deuterated pyrene derivative”). 
     The anthracene derivative as the host  242 , in which the anthracene core is deuterated, can be represented by Formula 1: 
     
       
         
         
             
             
         
       
     
     In Formula 1, each of R 1  and R 2  is independently C 6 ˜C 30  aryl group or C 5 ˜C 30  heteroaryl group, and each of L 1 , L 2 , L 3  and L 4  is independently C 6 ˜C 30  arylene group, each of a, b, c and d is an integer of 0 or 1, and e is an integer of 1 to 8. 
     Namely, in the core-deuterated anthracene derivative as the host  242 , the anthracene moiety as the core is substituted by deuterium (D), and the substituent except the anthracene moiety is not deuterated. 
     For example, each of R 1  and R 2  can be selected from the group consisting of phenyl, naphthyl, dimethylfluorenyl, dibenzofuranyl, dibenzothiophenyl, phenanthrenyl, and carbazolyl. The dimethylfluorenyl, dibenzofuranyl, dibenzothiophenyl, phenanthrenyl, and carbazolyl can be substituted by C 6 ˜C 30  aryl group, e.g., phenyl or naphthyl. Each of L 1 , L 2 , L 3  and L 4  can be phenylene or naphthylene. At least one of a, b, c and d can be 0, and e can be 8. 
     In an exemplary embodiment, the host  242  can be a compound being one of the followings in Formula 2: 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     On the other hand, in the EML  240 , when the pyrene core of the dopant  244  is deuterated (e.g., “core-deuterated pyrene derivative”), the host  242  can be non-deuterated (e.g., “non-deuterated anthracene derivative”) or all of the anthracene core and a substituent of the host  242  can be deuterated (e.g., “wholly-deuterated anthracene derivative”). Alternatively, the anthracene core of the host  242  except the substituent can be deuterated (e.g., “core-deuterated anthracene derivative”), or the substituent of the host  242  except the anthracene core can be deuterated (e.g., “substituent-deuterated anthracene derivative”). 
     The pyrene derivative as the dopant  244 , in which the pyrene core is deuterated, can be represented by Formula 3: 
     
       
         
         
             
             
         
       
     
     In Formula 3, each of X 1  and X 2  is independently O or S, each of Ar 1  and Ar 2  is independently C 6 ˜C 30  aryl group or C 5 ˜C 30  heteroaryl group, and R 3  is C 1 ˜C 10  alkyl group or C 1 ˜C 10  cycloalkyl group. In addition, f is an integer of 1 to 8, g is an integer of 0 to 2, and a summation off and g is 8 or less. 
     Namely, in the core-deuterated pyrene derivative as the dopant  244 , the pyrene moiety as the core is substituted by deuterium (D), and the substituent except the pyrene moiety is not deuterated. 
     For example, each of Ar 1  and Ar 2  can be selected from the group consisting of phenyl, dibenzofuranyl, dibenzothiophenyl, dimethylfluorenyl, pyridyl, and quinolinyl and can be substituted by C 1 ˜C 10  alkyl group or C 1 ˜C 10  cycloalkyl group, trimethylsilyl, or trifluoromethyl. In addition, R 3  can be methyl, ethyl, propyl, butyl, heptyl, cyclopentyl, cyclobutyl, or cyclopropyl. 
     In an exemplary embodiment, the dopant  244  of Formula 3 can be a compound being one of the followings in Formula 4: 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     For example, when the host  242  is a compound of Formula 1, the dopant  244  can be a compound of one of Formula 3 and Formulas 5-1 to 5-3. 
     
       
         
         
             
             
         
       
     
     In Formulas 5-1 to 5-3, each of X 1  and X 2  is independently O or S, each of Ar 1  and Ar 2  is independently C 6 ˜C 30  aryl group or C 5 ˜C 30  heteroaryl group, and R 3  is C 1 ˜C 10  alkyl group or C 1 ˜C 10  cycloalkyl group. In addition, each of f1 and f2 is independently an integer of 1 to 7, and g1 is an integer of 0 to 8. In Formula 5-3, f3 is an integer of 1 to 8, g2 is an integer of 0 to 2, and a summation of f3 and g2 is 8. In addition, a part or all of hydrogen atoms of Ar 1  and Ar 2  can be substituted by D. 
     When the dopant  244  is a compound of Formula 3, the host  242  is one of a compound of Formula 1, a compound of Formula 1, in which at least one of L1, L2, L3, L4, R1 and R2 is deuterated, and a compound of Formula 1, in which the anthracene core is not deuterated (e=0) and at least one of L1, L2, L3, L4, R1 and R2 is deuterated. 
     In the EML  240  of the OLED D, the host  242  can have a weight % of about 70 to 99.9, and the dopant  244  can have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency and lifespan, a weight % of the dopant  244  can be about 0.1 to 10, preferably about 1 to 5. 
     As mentioned above, the EML  240  of the OLED D includes the host  242  of the anthracene derivative, the dopant  244  of the pyrene derivative, and at least one of an anthracene core of the anthracene derivative  242  and a pyrene core of the pyrene derivative  244  is deuterated. As a result, the OLED D and the organic light emitting display device  100  have advantages in the emitting efficiency and the lifespan. 
     Synthesis of the Host 
     1. Synthesis of the Compound Host1D 
     (1) Compound H-1 
     
       
         
         
             
             
         
       
     
     The compound A (11.90 mmol) and and the compound B (13.12 mmol) were dissolved in toluene (100 mL), Pd(PPh 3 ) 4  (0.59 mmol) and 2M K 2 CO 3  (24 mL) were slowly added into the mixture. The mixture was reacted for 48 hours. After cooling, the temperature is set to the room temperature, and the solvent was removed under the reduced pressure. The reaction mixture was extracted with chloroform. The extracted solution was washed twice with sodium chloride supersaturated solution and water, and then the organic layer was collected and dried over anhydrous magnesium sulfate. Thereafter, the solvent was evaporated to obtain a crude product, and the column chromatography using silica gel was performed to the crude product to obtain the compound H-1. (2.27 g, 57%) 
     (2) Compound Host1D 
     
       
         
         
             
             
         
       
     
     The compound H-1 (5.23 mmol), the compound C (5.74 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.26 mmol) and toluene (50 mL) were added to the flask (250 mL) in a glove box. After the reaction flask was removed from the drying box, degassed aqueous sodium carbonate (2M, 20 mL) was added to the mixture. The mixture was stirred and heated at 90° C. overnight. The reaction was monitored by high-performance liquid chromatography (HPLC). After cooling to the room temperature, the organic layer was separated. The aqueous layer was washed twice with dichloromethane (DCM), and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The compound Host1D was obtained by performing purification using neutral alumina, precipitation using hexane, and column chromatography using silica gel. (2.00 g, 89%) 
     2. Synthesis of the Compound Host2D 
     (1) Compound H-2 
     
       
         
         
             
             
         
       
     
     In the synthesis of the compound H-1, the compound D was used instead of the compound B to obtain the compound H-2. 
     (2) Compound Host2D 
     
       
         
         
             
             
         
       
     
     The compound H-2 (5.23 mmol), the compound E (5.74 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.26 mmol) and toluene (50 mL) were added to the flask (250 mL) in a glove box. After the reaction flask was removed from the drying box, degassed aqueous sodium carbonate (2M, 20 mL) was added to the mixture. The mixture was stirred and heated at 90° C. overnight. The reaction was monitored by HPLC. After cooling to the room temperature, the organic layer was separated. The aqueous layer was washed twice with DCM, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The compound Host2D was obtained by performing purification using neutral alumina, precipitation using hexane, and column chromatography using silica gel. (2.28 g, 86%) 
     3. Synthesis of the Compound Host3D 
     (1) Compound H-3 
     
       
         
         
             
             
         
       
     
     In the synthesis of the compound H-1, the compound F was used instead of the compound B to obtain the compound H-3. 
     (2) Compound Host3D 
     
       
         
         
             
             
         
       
     
     The compound H-3 (5.23 mmol), the compound G (5.74 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.26 mmol) and toluene (50 mL) were added to the flask (250 mL) in a glove box. After the reaction flask was removed from the drying box, degassed aqueous sodium carbonate (2M, 20 mL) was added to the mixture. The mixture was stirred and heated at 90° C. overnight. The reaction was monitored by HPLC. After cooling to the room temperature, the organic layer was separated. The aqueous layer was washed twice with DCM, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The compound Host3D was obtained by performing purification using neutral alumina, precipitation using hexane, and column chromatography using silica gel. (1.71 g, 78%) 
     4. Synthesis of the Compound Host4D 
     
       
         
         
             
             
         
       
     
     The compound H-3 (5.23 mmol), the compound H (5.74 mmol), tris(dibenzylideneacetone)dipalladium(0) (0.26 mmol) and toluene (50 mL) were added to the flask (250 mL) in a glove box. After the reaction flask was removed from the drying box, degassed aqueous sodium carbonate (2M, 20 mL) was added to the mixture. The mixture was stirred and heated at 90° C. overnight. The reaction was monitored by HPLC. After cooling to the room temperature, the organic layer was separated. The aqueous layer was washed twice with DCM, and the organic layer was concentrated by rotary evaporation to obtain a gray powder. The compound Host4D was obtained by performing purification using neutral alumina, precipitation using hexane, and column chromatography using silica gel. (1.75 g, 67%) 
     Synthesis of the Dopant 
     1. Synthesis of the Compound Dopant1D 
     (1) Compound D-1 
     
       
         
         
             
             
         
       
     
     Under argon conditions, dibenzofuran (30.0 g) and dehydrated tetrahydrofuran (THF, 300 mL) were added to a distillation flask (1000 mL). The mixture was cooled to −65° C., and n-butyllithium hexane solution (1.65 M, 120 mL) was added. The mixture was slowly heated up and reacted at the room temperature for 3 hours. After the mixture was cooled to −65° C. again, 1,2-dibromoethane (23.1 mL) was added. The mixture was slowly heated up and reacted at the room temperature for 3 hours. 2N hydrochloric acid and ethyl acetate were added into the mixture for separation and extraction, and the organic layer was washed with water and saturated brine and dried over sodium sulfate. The crude product obtained by concentration was purified by silica gel chromatography using methylene chloride, and the obtained solid was dried under reduced pressure to obtain the compound D-1. (43.0 g) 
     (2) Compound D-2 
     
       
         
         
             
             
         
       
     
     Under argon conditions, the compound D-1 (11.7 g), the compound B (10.7 mL), tris(dibenzylideneacetone)dipalladium(0) (Pd2(dba) 3 , 0.26 mmol), 2,2′-bis(diphenylphosphino)-1,1′-binapthyl (BINAP, 0.87 g), sodium tert-butoxide (9.1 g), and dehydrated toluene (131 mL) were added to a distillation flask (300 mL) and reacted at 85° C. for 6 hours. After cooling, the reaction solution was filtered through celite. The obtained crude product was purified by silica gel chromatography using n-hexane and methylene chloride (volume ratio=3:1), and the obtained solid was dried under reduced pressure to obtain compound D-2. (10.0 g) 
     (3) Compound Dopant1D 
     
       
         
         
             
             
         
       
     
     Under argon conditions, the compound D-2 (8.6 g), the compound C (4.8 g), sodium tert-butoxide (2.5 g), palladium(II)acetate (Pd(OAc) 2 , 150 mg), tri-tert-butylphosphine (135 mg), and dehydrated toluene (90 mL) were added into a distillation flask (300 mL) and reacted at 85° C. for 7 hours. The reaction solution was filtered, and the obtained crude product was purified by silica gel chromatography using toluene. The obtained solid was recrystallized using toluene and dried under reduced pressure to obtain the compound Dopant1D. (8.3 g) 
     2. Synthesis of the Compound Dopant2D 
     
       
         
         
             
             
         
       
     
     In the synthesis of the compound Dopant1D, the compound D was used instead of the compound C to obtain the compound Dopant2D. 
     [Organic Light Emitting Diode] 
     The anode (ITO, 0.5 mm), the HIL (Formula 6 (97 wt %) and Formula 7 (3 wt %), 100 Å), the HTL (Formula 6, 1000 Å), the EBL (Formula 8, 100 Å), the EML (host (98 wt %) and dopant (2 wt %), 200 Å), the HBL (Formula 9, 100 Å), the EIL (Formula 10 (98 wt %) and Li (2 wt %), 200 Å) and the cathode (Al, 500 Å) was sequentially deposited, and an encapsulation film was formed on the cathode using UV epoxy resin and moisture getter to form the OLED. 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     1. Comparative Examples 
     (1) Comparative Examples 1 to 4 (Ref1 to Ref4) 
     The compound “Dopant1” in Formula 11 is used as the dopant, and the compounds “Host1”, “Host2”, “Host3”, and “Host4” in Formula 12 are used as the host, respectively, to form the EML. 
     (2) Comparative Examples 5 to 8 (Ref5 to Ref8) 
     The compound “Dopant2” in Formula 11 is used as the dopant, and the compounds “Host1”, “Host2”, “Host3”, and “Host4” in Formula 12 are used as the host, respectively, to form the EML. 
     2. Examples 
     (1) Examples 1 to 4 (Ex1 to Ex4) 
     The compound “Dopant1” in Formula 11 is used as the dopant, and the compound “Host1D”, and the compounds “Host1D-A”, “Host1D-P1”, and “Host1D-P2” in Formula 12 are used as the host, respectively, to form the EML. 
     (2) Examples 5 to 9 (Ex5 to Ex9) 
     The compound “Dopant1D” is used as the dopant, and the compounds “Host1”, “Host1D”, “Host1D-A”, “Host1D-P1”, and “Host1D-P2” are used as the host, respectively, to form the EML. 
     (3) Examples 10 to 14 (Ex10 to Ex14) 
     The compound “Dopant1D-A” in Formula 11 is used as the dopant, and the compounds “Host1”, “Host1D”, “Host1D-A”, “Host1D-P1”, and “Host1D-P2” are used as the host, respectively, to form the EML. 
     (4) Examples 15 to 18 (Ex15 to Ex18) 
     The compound “Dopant1” in Formula 11 is used as the dopant, and the compounds “Host2D”, “Host2D-A”, “Host2D-P1”, and “Host2D-P2” are used as the host, respectively, to form the EML. 
     (5) Examples 19 to 23 (Ex19 to Ex23) 
     The compound “Dopant1D” is used as the dopant, and the compounds “Host2”, “Host2D”, “Host2D-A”, “Host2D-P1”, and “Host2D-P2” are used as the host, respectively, to form the EML. 
     (6) Examples 24 to 28 (Ex24 to Ex28) 
     The compound “Dopant1D-A” in Formula 11 is used as the dopant, and the compounds “Host2”, “Host2D”, “Host2D-A”, “Host2D-P1”, and “Host2D-P2” are used as the host, respectively, to form the EML. 
     (7) Examples 29 to 32 (Ex29 to Ex32) 
     The compound “Dopant1” in Formula 11 is used as the dopant, and the compound “Host3D”, and the compounds “Host3D-A”, “Host3D-P1”, and “Host3D-P2” in Formula 12 are used as the host, respectively, to form the EML. 
     (8) Examples 33 to 37 (Ex33 to Ex37) 
     The compound “Dopant1D” is used as the dopant, and the compounds “Host3”, “Host3D”, “Host3D-A”, “Host3D-P1”, and “Host3D-P2” are used as the host, respectively, to form the EML. 
     (9) Examples 38 to 42 (Ex38 to Ex42) 
     The compound “Dopant1D-A” in Formula 11 is used as the dopant, and the compounds “Host3”, “Host3D”, “Host3D-A”, “Host3D-P1”, and “Host3D-P2” are used as the host, respectively, to form the EML. 
     (10) Examples 43 to 46 (Ex43 to Ex46) 
     The compound “Dopant1” in Formula 11 is used as the dopant, and the compounds “Host4D”, “Host4D-A”, “Host4D-P1”, and “Host4D-P2” are used as the host, respectively, to form the EML. 
     (11) Examples 47 to 51 (Ex47 to Ex51) 
     The compound “Dopant1D” is used as the dopant, and the compounds “Host4”, “Host4D”, “Host4D-A”, “Host4D-P1”, and “Host4D-P2” are used as the host, respectively, to form the EML. 
     (12) Examples 52 to 56 (Ex52 to Ex56) 
     The compound “Dopant1D-A” in Formula 11 is used as the dopant, and the compounds “Host4”, “Host4D”, “Host4D-A”, “Host4D-P1”, and “Host4D-P2” are used as the host, respectively, to form the EML. 
     (13) Examples 57 to 60 (Ex57 to Ex60) 
     The compound “Dopant2” in Formula 11 is used as the dopant, and the compound “Host1D”, and the compounds “Host1 D-A”, “Host1 D-P1”, and “Host1 D-P2” in Formula 12 are used as the host, respectively, to form the EML. 
     (14) Examples 61 to 65 (Ex61 to Ex65) 
     The compound “Dopant2D” is used as the dopant, and the compounds “Host1”, “Host1D”, “Host1D-A”, “Host1D-P1”, and “Host1D-P2” are used as the host, respectively, to form the EML. 
     (15) Examples 66 to 70 (Ex66 to Ex70) 
     The compound “Dopant2D-A” in Formula 11 is used as the dopant, and the compounds “Host1”, “Host1D”, “Host1D-A”, “Host1D-P1”, and “Host1D-P2” are used as the host, respectively, to form the EML. 
     (16) Examples 71 to 74 (Ex71 to Ex74) 
     The compound “Dopant2” in Formula 11 is used as the dopant, and the compounds “Host2D”, “Host2D-A”, “Host2D-P1”, and “Host2D-P2” are used as the host, respectively, to form the EML. 
     (17) Examples 75 to 79 (Ex75 to Ex79) 
     The compound “Dopant2D” is used as the dopant, and the compounds “Host2”, “Host2D”, “Host2D-A”, “Host2D-P1”, and “Host2D-P2” are used as the host, respectively, to form the EML. 
     (18) Examples 80 to 84 (Ex80 to Ex84) 
     The compound “Dopant2D-A” in Formula 11 is used as the dopant, and the compounds “Host2”, “Host2D”, “Host2D-A”, “Host2D-P1”, and “Host2D-P2” are used as the host, respectively, to form the EML. 
     (19) Examples 85 to 88 (Ex85 to Ex88) 
     The compound “Dopant2” in Formula 11 is used as the dopant, and the compound “Host3D”, and the compounds “Host3D-A”, “Host3D-P1”, and “Host3D-P2” in Formula 12 are used as the host, respectively, to form the EML. 
     (20) Examples 89 to 93 (Ex89 to Ex93) 
     The compound “Dopant2D” is used as the dopant, and the compounds “Host3”, “Host3D”, “Host3D-A”, “Host3D-P1”, and “Host3D-P2” are used as the host, respectively, to form the EML. 
     (21) Examples 94 to 98 (Ex94 to Ex98) 
     The compound “Dopant2D-A” in Formula 11 is used as the dopant, and the compounds “Host3”, “Host3D”, “Host3D-A”, “Host3D-P1”, and “Host3D-P2” are used as the host, respectively, to form the EML. 
     (22) Examples 99 to 102 (Ex99 to Ex102) 
     The compound “Dopant2” in Formula 11 is used as the dopant, and the compounds “Host4D”, “Host4D-A”, “Host4D-P1”, and “Host4D-P2” are used as the host, respectively, to form the EML. 
     (23) Examples 103 to 107 (Ex103 to Ex107) 
     The compound “Dopant2D” is used as the dopant, and the compounds “Host4”, “Host4D”, “Host4D-A”, “Host4D-P1”, and “Host4D-P2” are used as the host, respectively, to form the EML. 
     (24) Examples 108 to 112 (Ex108 to Ex112) 
     The compound “Dopant2D-A” in Formula 11 is used as the dopant, and the compounds “Host4”, “Host4D”, “Host4D-A”, “Host4D-P1”, and “Host4D-P2” are used as the host, respectively, to form the EML. 
     
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
       
         
         
             
             
         
       
     
     The properties, i.e., voltage (V), efficiency (cd/A), color coordinate (CIE), FWHM and lifespan (T95), of the OLEDs manufactured in Comparative Examples 1 to 8 and Examples 1 to 112 are measured and listed in Tables 1 to 8. 
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 1 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 1 
                 Dopant 1 
                 Host 1 
                 3.83 
                 6.62 
                 0.1382 
                 0.1019 
                 321 
               
               
                 Ex 1 
                 Dopant 1 
                 Host 1D 
                 3.84 
                 6.60 
                 0.1393 
                 0.1019 
                 549 
               
               
                 Ex 2 
                 Dopant 1 
                 Host 1D-A 
                 3.82 
                 6.61 
                 0.1384 
                 0.1018 
                 562 
               
               
                 Ex 3 
                 Dopant 1 
                 Host 1D-P1 
                 3.83 
                 6.60 
                 0.1381 
                 0.1020 
                 320 
               
               
                 Ex 4 
                 Dopant 1 
                 Host 1D-P2 
                 3.84 
                 6.62 
                 0.1385 
                 0.1019 
                 321 
               
               
                 Ex 5 
                 Dopant 1D 
                 Host 1 
                 3.83 
                 6.61 
                 0.1390 
                 0.1018 
                 417 
               
               
                 Ex 6 
                 Dopant 1D 
                 Host 1D 
                 3.83 
                 6.61 
                 0.1392 
                 0.1018 
                 704 
               
               
                 Ex 7 
                 Dopant 1D 
                 Host 1D-A 
                 3.84 
                 6.60 
                 0.1390 
                 0.1019 
                 730 
               
               
                 Ex 8 
                 Dopant 1D 
                 Host 1D-P1 
                 3.82 
                 6.61 
                 0.1391 
                 0.1020 
                 417 
               
               
                 Ex 9 
                 Dopant 1D 
                 Host 1D-P2 
                 3.83 
                 6.63 
                 0.1388 
                 0.1021 
                 418 
               
               
                 Ex 10 
                 Dopant 1D-A 
                 Host 1 
                 3.82 
                 6.62 
                 0.1386 
                 0.1018 
                 433 
               
               
                 Ex 11 
                 Dopant 1D-A 
                 Host 1D 
                 3.84 
                 6.61 
                 0.1391 
                 0.1018 
                 747 
               
               
                 Ex 12 
                 Dopant 1D-A 
                 Host 1D-A 
                 3.83 
                 6.61 
                 0.1385 
                 0.1018 
                 762 
               
               
                 Ex 13 
                 Dopant 1D-A 
                 Host 1D-P1 
                 3.83 
                 6.60 
                 0.1387 
                 0.1019 
                 430 
               
               
                 Ex 14 
                 Dopant 1D-A 
                 Host 1D-P2 
                 3.84 
                 6.61 
                 0.1386 
                 0.1019 
                 433 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 2 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 2. 
                 Dopant 1 
                 Host 2 
                 3.64 
                 6.84 
                 0.1383 
                 0.1019 
                 322 
               
               
                 Ex 15. 
                 Dopant 1 
                 Host 2D 
                 3.63 
                 6.84 
                 0.1392 
                 0.1020 
                 554 
               
               
                 Ex 16. 
                 Dopant 1 
                 Host 2D-A 
                 3.63 
                 6.83 
                 0.1390 
                 0.1018 
                 566 
               
               
                 Ex 17. 
                 Dopant 1 
                 Host 2D-P1 
                 3.64 
                 6.82 
                 0.1391 
                 0.1018 
                 322 
               
               
                 Ex 18. 
                 Dopant 1 
                 Host 2D-P2 
                 3.62 
                 6.86 
                 0.1392 
                 0.1019 
                 323 
               
               
                 Ex 19. 
                 Dopant 1D 
                 Host 2 
                 3.63 
                 6.85 
                 0.1392 
                 0.1019 
                 422 
               
               
                 Ex 20. 
                 Dopant 1D 
                 Host 2D 
                 3.64 
                 6.84 
                 0.1394 
                 0.1018 
                 713 
               
               
                 Ex 21. 
                 Dopant 1D 
                 Host 2D-A 
                 3.65 
                 6.84 
                 0.1389 
                 0.1020 
                 734 
               
               
                 Ex 22. 
                 Dopant 1D 
                 Host 2D-P1 
                 3.62 
                 6.83 
                 0.1392 
                 0.1022 
                 422 
               
               
                 Ex 23. 
                 Dopant 1D 
                 Host 2D-P2 
                 3.63 
                 6.83 
                 0.1393 
                 0.1018 
                 422 
               
               
                 Ex 24. 
                 Dopant 1D-A 
                 Host 2 
                 3.63 
                 6.85 
                 0.1386 
                 0.1021 
                 438 
               
               
                 Ex 25. 
                 Dopant 1D-A 
                 Host 2D 
                 3.63 
                 6.84 
                 0.1394 
                 0.1017 
                 753 
               
               
                 Ex 26. 
                 Dopant 1D-A 
                 Host 2D-A 
                 3.64 
                 6.82 
                 0.1387 
                 0.1019 
                 771 
               
               
                 Ex 27. 
                 Dopant 1D-A 
                 Host 2D-P1 
                 3.63 
                 6.83 
                 0.1392 
                 0.1018 
                 440 
               
               
                 Ex 28. 
                 Dopant 1D-A 
                 Host 2D-P2 
                 3.64 
                 6.84 
                 0.1392 
                 0.1019 
                 438 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 3 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 3. 
                 Dopant 1 
                 Host 3 
                 3.54 
                 6.54 
                 0.1393 
                 0.1032 
                 282 
               
               
                 Ex 29. 
                 Dopant 1 
                 Host 3D 
                 3.52 
                 6.55 
                 0.1390 
                 0.1035 
                 482 
               
               
                 Ex 30. 
                 Dopant 1 
                 Host 3D-A 
                 3.50 
                 6.50 
                 0.1389 
                 0.1025 
                 495 
               
               
                 Ex 31. 
                 Dopant 1 
                 Host 3D-P1 
                 3.52 
                 6.52 
                 0.1390 
                 0.1030 
                 282 
               
               
                 Ex 32. 
                 Dopant 1 
                 Host 3D-P2 
                 3.54 
                 6.52 
                 0.1391 
                 0.1031 
                 281 
               
               
                 Ex 33. 
                 Dopant 1D 
                 Host 3 
                 3.54 
                 6.53 
                 0.1392 
                 0.1033 
                 375 
               
               
                 Ex 34. 
                 Dopant 1D 
                 Host 3D 
                 3.53 
                 6.53 
                 0.1391 
                 0.1033 
                 631 
               
               
                 Ex 35. 
                 Dopant 1D 
                 Host 3D-A 
                 3.55 
                 6.55 
                 0.1393 
                 0.1028 
                 656 
               
               
                 Ex 36. 
                 Dopant 1D 
                 Host 3D-P1 
                 3.50 
                 6.51 
                 0.1390 
                 0.1028 
                 374 
               
               
                 Ex 37. 
                 Dopant 1D 
                 Host 3D-P2 
                 3.56 
                 6.50 
                 0.1391 
                 0.1032 
                 375 
               
               
                 Ex 38. 
                 Dopant 1D-A 
                 Host 3 
                 3.52 
                 6.56 
                 0.1388 
                 0.1031 
                 381 
               
               
                 Ex 39. 
                 Dopant 1D-A 
                 Host 3D 
                 3.52 
                 6.54 
                 0.1392 
                 0.1032 
                 681 
               
               
                 Ex 40. 
                 Dopant 1D-A 
                 Host 3D-A 
                 3.53 
                 6.54 
                 0.1390 
                 0.1032 
                 686 
               
               
                 Ex 41. 
                 Dopant 1D-A 
                 Host 3D-P1 
                 3.52 
                 6.53 
                 0.1392 
                 0.1030 
                 381 
               
               
                 Ex 42. 
                 Dopant 1D-A 
                 Host 3D-P2 
                 3.54 
                 6.51 
                 0.1391 
                 0.1031 
                 381 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 4 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 4. 
                 Dopant 1 
                 Host 4 
                 3.59 
                 6.60 
                 0.1393 
                 0.1029 
                 290 
               
               
                 Ex 43. 
                 Dopant 1 
                 Host 4D 
                 3.60 
                 6.62 
                 0.1393 
                 0.1030 
                 502 
               
               
                 Ex 44. 
                 Dopant 1 
                 Host 4D-A 
                 3.58 
                 6.57 
                 0.1380 
                 0.1024 
                 516 
               
               
                 Ex 45. 
                 Dopant 1 
                 Host 4D-P1 
                 3.62 
                 6.65 
                 0.1391 
                 0.1029 
                 291 
               
               
                 Ex 46. 
                 Dopant 1 
                 Host 4D-P2 
                 3.60 
                 6.60 
                 0.1398 
                 0.1035 
                 291 
               
               
                 Ex 47. 
                 Dopant 1D 
                 Host 4 
                 3.59 
                 6.60 
                 0.1391 
                 0.1030 
                 383 
               
               
                 Ex 48. 
                 Dopant 1D 
                 Host 4D 
                 3.60 
                 6.61 
                 0.1390 
                 0.1030 
                 654 
               
               
                 Ex 49. 
                 Dopant 1D 
                 Host 4D-A 
                 3.59 
                 6.61 
                 0.1395 
                 0.1035 
                 678 
               
               
                 Ex 50. 
                 Dopant 1D 
                 Host 4D-P1 
                 3.59 
                 6.54 
                 0.1392 
                 0.1032 
                 383 
               
               
                 Ex 51. 
                 Dopant 1D 
                 Host 4D-P2 
                 3.57 
                 6.58 
                 0.1382 
                 0.1030 
                 381 
               
               
                 Ex 52. 
                 Dopant 1D-A 
                 Host 4 
                 3.59 
                 6.60 
                 0.1390 
                 0.1032 
                 392 
               
               
                 Ex 53. 
                 Dopant 1D-A 
                 Host 4D 
                 3.60 
                 6.60 
                 0.1390 
                 0.1031 
                 690 
               
               
                 Ex 54. 
                 Dopant 1D-A 
                 Host 4D-A 
                 3.64 
                 6.67 
                 0.1388 
                 0.1033 
                 706 
               
               
                 Ex 55. 
                 Dopant 1D-A 
                 Host 4D-P1 
                 3.63 
                 6.60 
                 0.1390 
                 0.1030 
                 392 
               
               
                 Ex 56. 
                 Dopant 1D-A 
                 Host 4D-P2 
                 6.62 
                 6.58 
                 0.1391 
                 0.1027 
                 392 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 5 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 5. 
                 Dopant 2 
                 Host 1 
                 3.75 
                 6.73 
                 0.1380 
                 0.1010 
                 385 
               
               
                 Ex 57. 
                 Dopant 2 
                 Host 1D 
                 3.75 
                 6.73 
                 0.1381 
                 0.1010 
                 658 
               
               
                 Ex 58. 
                 Dopant 2 
                 Host 1D-A 
                 3.70 
                 6.71 
                 0.1382 
                 0.1015 
                 670 
               
               
                 Ex 59. 
                 Dopant 2 
                 Host 1D-P1 
                 3.75 
                 6.72 
                 0.1382 
                 0.1009 
                 385 
               
               
                 Ex 60. 
                 Dopant 2 
                 Host 1D-P2 
                 3.72 
                 6.70 
                 0.1381 
                 0.1012 
                 385 
               
               
                 Ex 61. 
                 Dopant 2D 
                 Host 1 
                 3.76 
                 6.72 
                 0.1382 
                 0.1008 
                 500 
               
               
                 Ex 62. 
                 Dopant 2D 
                 Host 1D 
                 3.76 
                 6.71 
                 0.1382 
                 0.1012 
                 839 
               
               
                 Ex 63. 
                 Dopant 2D 
                 Host 1D-A 
                 3.71 
                 6.80 
                 0.1378 
                 0.1013 
                 877 
               
               
                 Ex 64. 
                 Dopant 2D 
                 Host 1D-P1 
                 3.74 
                 6.72 
                 0.1382 
                 0.1007 
                 500 
               
               
                 Ex 65. 
                 Dopant 2D 
                 Host 1D-P2 
                 3.75 
                 6.68 
                 0.1381 
                 0.1014 
                 501 
               
               
                 Ex 66. 
                 Dopant 2D-A 
                 Host 1 
                 3.78 
                 6.70 
                 0.1378 
                 0.1013 
                 524 
               
               
                 Ex 67. 
                 Dopant 2D-A 
                 Host 1D 
                 3.77 
                 6.70 
                 0.1382 
                 0.1013 
                 880 
               
               
                 Ex 68. 
                 Dopant 2D-A 
                 Host 1D-A 
                 3.71 
                 6.72 
                 0.1383 
                 0.1010 
                 901 
               
               
                 Ex 69. 
                 Dopant 2D-A 
                 Host 1D-P1 
                 3.72 
                 6.71 
                 0.1382 
                 0.1011 
                 525 
               
               
                 Ex 70. 
                 Dopant 2D-A 
                 Host 1D-P2 
                 3.75 
                 6.66 
                 0.1380 
                 0.1012 
                 525 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 6 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 6. 
                 Dopant 2 
                 Host 2 
                 3.60 
                 6.91 
                 0.1381 
                 0.1021 
                 385 
               
               
                 Ex 71. 
                 Dopant 2 
                 Host 2D 
                 3.60 
                 6.92 
                 0.1383 
                 0.1023 
                 660 
               
               
                 Ex 72. 
                 Dopant 2 
                 Host 2D-A 
                 3.55 
                 6.85 
                 0.1381 
                 0.1022 
                 674 
               
               
                 Ex 73. 
                 Dopant 2 
                 Host 2D-P1 
                 3.58 
                 6.90 
                 0.1382 
                 0.1019 
                 384 
               
               
                 Ex 74. 
                 Dopant 2 
                 Host 2D-P2 
                 3.58 
                 6.88 
                 0.1382 
                 0.1022 
                 386 
               
               
                 Ex 75. 
                 Dopant 2D 
                 Host 2 
                 3.59 
                 6.91 
                 0.1380 
                 0.1024 
                 502 
               
               
                 Ex 76. 
                 Dopant 2D 
                 Host 2D 
                 3.60 
                 6.90 
                 0.1381 
                 0.1023 
                 845 
               
               
                 Ex 77. 
                 Dopant 2D 
                 Host 2D-A 
                 3.58 
                 6.92 
                 0.1377 
                 0.1022 
                 879 
               
               
                 Ex 78. 
                 Dopant 2D 
                 Host 2D-P1 
                 3.62 
                 6.84 
                 0.1382 
                 0.1019 
                 502 
               
               
                 Ex 79. 
                 Dopant 2D 
                 Host 2D-P2 
                 3.56 
                 6.87 
                 0.1383 
                 0.1020 
                 501 
               
               
                 Ex 80. 
                 Dopant 2D-A 
                 Host 2 
                 3.55 
                 6.90 
                 0.1380 
                 0.1020 
                 520 
               
               
                 Ex 81. 
                 Dopant 2D-A 
                 Host 2D 
                 3.61 
                 6.91 
                 0.1381 
                 0.1023 
                 899 
               
               
                 Ex 82. 
                 Dopant 2D-A 
                 Host 2D-A 
                 3.62 
                 6.88 
                 0.1382 
                 0.1021 
                 920 
               
               
                 Ex 83. 
                 Dopant 2D-A 
                 Host 2D-P1 
                 3.55 
                 6.84 
                 0.1383 
                 0.1022 
                 520 
               
               
                 Ex 84. 
                 Dopant 2D-A 
                 Host 2D-P2 
                 3.57 
                 6.85 
                 0.1381 
                 0.1019 
                 522 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 7 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 7. 
                 Dopant 2 
                 Host 3 
                 3.52 
                 6.68 
                 0.1386 
                 0.1033 
                 338 
               
               
                 Ex 85. 
                 Dopant 2 
                 Host 3D 
                 3.53 
                 6.66 
                 0.1381 
                 0.1032 
                 585 
               
               
                 Ex 86. 
                 Dopant 2 
                 Host 3D-A 
                 3.51 
                 6.65 
                 0.1381 
                 0.1033 
                 599 
               
               
                 Ex 87. 
                 Dopant 2 
                 Host 3D-P1 
                 3.51 
                 6.61 
                 0.1382 
                 0.1031 
                 338 
               
               
                 Ex 88. 
                 Dopant 2 
                 Host 3D-P2 
                 3.52 
                 6.68 
                 0.1384 
                 0.1033 
                 338 
               
               
                 Ex 89. 
                 Dopant 2D 
                 Host 3 
                 3.52 
                 6.67 
                 0.1382 
                 0.1032 
                 412 
               
               
                 Ex 90. 
                 Dopant 2D 
                 Host 3D 
                 3.51 
                 6.69 
                 0.1385 
                 0.1032 
                 737 
               
               
                 Ex 91. 
                 Dopant 2D 
                 Host 3D-A 
                 3.50 
                 6.66 
                 0.1382 
                 0.1029 
                 748 
               
               
                 Ex 92. 
                 Dopant 2D 
                 Host 3D-P1 
                 3.55 
                 6.68 
                 0.1388 
                 0.1033 
                 410 
               
               
                 Ex 93. 
                 Dopant 2D 
                 Host 3D-P2 
                 3.51 
                 6.65 
                 0.1385 
                 0.1031 
                 414 
               
               
                 Ex 94. 
                 Dopant 2D-A 
                 Host 3 
                 3.52 
                 6.69 
                 0.1381 
                 0.1031 
                 456 
               
               
                 Ex 95. 
                 Dopant 2D-A 
                 Host 3D 
                 3.51 
                 6.69 
                 0.1384 
                 0.1031 
                 774 
               
               
                 Ex 96. 
                 Dopant 2D-A 
                 Host 3D-A 
                 3.53 
                 6.68 
                 0.1381 
                 0.1032 
                 812 
               
               
                 Ex 97. 
                 Dopant 2D-A 
                 Host 3D-P1 
                 3.51 
                 6.62 
                 0.1384 
                 0.1033 
                 455 
               
               
                 Ex 98. 
                 Dopant 2D-A 
                 Host 3D-P2 
                 3.50 
                 6.67 
                 0.1384 
                 0.1033 
                 456 
               
               
                   
               
            
           
         
       
     
     
       
         
           
               
               
               
               
               
               
             
               
                   
                 TABLE 8 
               
               
                   
                   
               
               
                   
                 EML 
                 V 
                 cd/A 
                 CIE (x, y) 
                 T95 [hr] 
               
               
                   
                   
               
             
            
               
                   
               
            
           
           
               
               
               
               
               
               
               
               
            
               
                 Ref 8. 
                 Dopant 2 
                 Host 4 
                 3.54 
                 6.70 
                 0.1382 
                 0.1031 
                 351 
               
               
                 Ex 99. 
                 Dopant 2 
                 Host 4D 
                 3.54 
                 6.73 
                 0.1381 
                 0.1031 
                 600 
               
               
                 Ex 100. 
                 Dopant 2 
                 Host 4D-A 
                 3.55 
                 6.69 
                 0.1380 
                 0.1033 
                 610 
               
               
                 Ex 101. 
                 Dopant 2 
                 Host 4D-P1 
                 3.51 
                 6.68 
                 0.1381 
                 0.1032 
                 351 
               
               
                 Ex 102. 
                 Dopant 2 
                 Host 4D-P2 
                 3.50 
                 6.68 
                 0.1385 
                 0.1031 
                 351 
               
               
                 Ex 103. 
                 Dopant 2D 
                 Host 4 
                 3.53 
                 6.72 
                 0.1387 
                 0.1030 
                 431 
               
               
                 Ex 104. 
                 Dopant 2D 
                 Host 4D 
                 3.53 
                 6.70 
                 0.1383 
                 0.1032 
                 764 
               
               
                 Ex 105. 
                 Dopant 2D 
                 Host 4D-A 
                 3.53 
                 6.72 
                 0.1382 
                 0.1032 
                 790 
               
               
                 Ex 106. 
                 Dopant 2D 
                 Host 4D-P1 
                 3.52 
                 6.71 
                 0.1378 
                 0.1033 
                 433 
               
               
                 Ex 107. 
                 Dopant 2D 
                 Host 4D-P2 
                 3.51 
                 6.70 
                 0.1382 
                 0.1030 
                 435 
               
               
                 Ex 108. 
                 Dopant 2D-A 
                 Host 4 
                 3.54 
                 6.68 
                 0.1383 
                 0.1032 
                 473 
               
               
                 Ex 109. 
                 Dopant 2D-A 
                 Host 4D 
                 3.53 
                 6.71 
                 0.1383 
                 0.1032 
                 800 
               
               
                 Ex 110. 
                 Dopant 2D-A 
                 Host 4D-A 
                 3.51 
                 6.70 
                 0.1381 
                 0.1030 
                 828 
               
               
                 Ex 111. 
                 Dopant 2D-A 
                 Host 4D-P1 
                 3.50 
                 6.68 
                 0.1380 
                 0.1033 
                 473 
               
               
                 Ex 112. 
                 Dopant 2D-A 
                 Host 4D-P2 
                 3.54 
                 6.69 
                 0.1382 
                 0.1031 
                 473 
               
               
                   
               
            
           
         
       
     
     As shown in Tables 1 to 8, the lifespan of the OLED in Examples 1, 2, 6, 7, 11, 12, 15, 16, 20, 21, 25, 26, 29, 30, 34, 35, 39, 40, 43, 44, 48, 49, 53, 54, 57, 58, 62, 63, 67, 68, 71, 72, 76, 77, 81, 82, 85, 86, 90, 91, 95, 96, 99, 100, 104, 105, 109 and 110, which uses an anthracene derivative including the deuterated anthracene core as the host, is significantly increased. 
     On the other hand, in comparison to the OLED in Examples 2, 7, 12, 16, 21, 26, 30, 35, 40, 44, 49, 54, 58, 63, 68, 72, 77, 82, 86, 91, 96, 100, 105 and 110, which uses the wholly-deuterated anthracene derivative as the host, the lifespan of the OLED in Examples 1, 6, 11, 15, 20, 25, 29, 34, 39, 43, 48, 53, 57, 62, 67, 71, 76, 81, 85, 90, 95, 99, 104 and 109, which uses the core-deuterated anthracene derivative as the host, is slightly short. However, the OLED in Examples 1, 6, 11, 15, 20, 25, 29, 34, 39, 43, 48, 53, 57, 62, 67, 71, 76, 81, 85, 90, 95, 99, 104 and 109 provides sufficient lifespan increase with low ratio of deuterium, which is expensive. Namely, the OLED in Examples 1, 6, 11, 15, 20, 25, 29, 34, 39, 43, 48, 53, 57, 62, 67, 71, 76, 81, 85, 90, 95, 99, 104 and 109 has enhanced emitting efficiency and lifespan with minimizing production cost increase. 
     In addition, the lifespan of the OLED in Examples 5 to 14, 19 to 28, 33 to 42, 47 to 56, 61 to 70, 75 to 84, 89 to 98 and 103 to 112, which uses a pyrene derivative including the deuterated pyrene core as the dopant, is significantly increased. 
     On the other hand, in comparison to the OLED in Examples 10 to 14, 24 to 28, 38 to 42, 52 to 56, 66 to 70, 80 to 84, 94 to 98, 108 to 112, which uses the wholly-deuterated pyrene derivative as the dopant, the lifespan of the OLED in Examples 5 to 9, 19 to 23, 33 to 37, 47 to 51, 61 to 65, 75 to 79, 89 to 93 and 103 to 107, which uses the core-deuterated pyrene derivative as the dopant, is slightly short. However, the OLED in Examples 5 to 9, 19 to 23, 33 to 37, 47 to 51, 61 to 65, 75 to 79, 89 to 93 and 103 to 107 provides sufficient lifespan increase with low ratio of deuterium, which is expensive. 
     In the OLED D of the present disclosure, the EML  240  includes the host of the anthracene derivative and the dopant of the pyrene derivative, and at least one of the anthracene core of the anthracene derivative and the pyrene core of the pyrene derivative is deuterated. As a result, the OLED D and the organic light emitting display device  100  have advantages in the emitting efficiency and the lifespan. 
       FIG. 4  is a schematic cross-sectional view illustrating an OLED having a tandem structure of two emitting units 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 second emitting part  330  including a second EML  340  and a charge generation layer (CGL)  350  between the first and second emitting parts  310  and  330 . Namely, the OLED D in  FIG. 4  and the OLED D in  FIG. 3  have a difference in the organic emitting layer  162 . 
     The first electrode  160  can be formed of a conductive material having a relatively high work function to serve as an anode for injecting a hole into the organic emitting layer  162 . The second electrode  164  can be formed of a conductive material having a relatively low work function to serve as a cathode for injecting an electron into the organic emitting layer  162 . The first electrode  160  can be formed of ITO or IZO, and the second electrode  164  can be formed of Al, Mg, Ag, AlMg or MgAg. 
     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  includes a first EML  320 . In addition, the first emitting part  310  can further include a first EBL  316  between the first electrode  160  and the first EML  320  and a first HBL  318  between the first EML  320  and the CGL  350 . 
     In addition, the first emitting part  310  can 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 host  322 , which is an anthracene derivative, and a dopant  324 , which is a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. The first EML  320  provides a blue emission. 
     For example, when the anthracene core of the host  322  is deuterated (e.g., “core-deuterated anthracene derivative”), the dopant  324  can be non-deuterated (e.g., “non-deuterated pyrene derivative”) or all of the pyrene core and a substituent of the dopant  324  can be deuterated (e.g., “wholly-deuterated pyrene derivative”). Alternatively, the pyrene core of the dopant  324  except the substituent can be deuterated (e.g., “core-deuterated pyrene derivative”), or the substituent of the dopant  324  except the pyrene core can be deuterated (e.g., “substituent-deuterated pyrene derivative”). 
     Alternatively, in the first EML  320 , when the pyrene core of the dopant  324  is deuterated (e.g., “core-deuterated pyrene derivative”), the host  322  can be non-deuterated (e.g., “non-deuterated anthracene derivative”) or all of the anthracene core and a substituent of the host  322  can be deuterated (e.g., “wholly-deuterated anthracene derivative”). Alternatively, the anthracene core of the host  322  except the substituent can be deuterated (e.g., “core-deuterated anthracene derivative”), or the substituent of the host  322  except the anthracene core can be deuterated (e.g., “substituent-deuterated anthracene derivative”). 
     In the first EML  320 , the host  322  can have a weight % of about 70 to 99.9, and the dopant  324  can have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency and lifespan, a weight % of the dopant  324  can be about 0.1 to 10, preferably about 1 to 5. 
     The second emitting part  330  includes the second EML  340 . In addition, the second emitting part  330  can further include a second EBL  334  between the CGL  350  and the second EML  340  and a second HBL  336  between the second EML  340  and the second electrode  164 . 
     In addition, the second emitting part  330  can 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 host  342 , which is an anthracene derivative, a dopant  344 , which is a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. The second EML  340  provides a blue emission. 
     For example, when the anthracene core of the host  342  is deuterated (e.g., “core-deuterated anthracene derivative”), the dopant  344  can be non-deuterated (e.g., “non-deuterated pyrene derivative”) or all of the pyrene core and a substituent of the dopant  344  can be deuterated (e.g., “wholly-deuterated pyrene derivative”). Alternatively, the pyrene core of the dopant  344  except the substituent can be deuterated (e.g., “core-deuterated pyrene derivative”), or the substituent of the dopant  344  except the pyrene core can be deuterated (e.g., “substituent-deuterated pyrene derivative”). 
     Alternatively, in the second EML  340 , when the pyrene core of the dopant  344  is deuterated (e.g., “core-deuterated pyrene derivative”), the host  342  can be non-deuterated (e.g., “non-deuterated anthracene derivative”) or all of the anthracene core and a substituent of the host  342  can be deuterated (e.g., “wholly-deuterated anthracene derivative”). Alternatively, the anthracene core of the host  342  except the substituent can be deuterated (e.g., “core-deuterated anthracene derivative”), or the substituent of the host  342  except the anthracene core can be deuterated (e.g., “substituent-deuterated anthracene derivative”). 
     In the second EML  340 , the host  342  can have a weight % of about 70 to 99.9, and the dopant  344  can have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency and lifespan, a weight % of the dopant  344  can be about 0.1 to 10, preferably about 1 to 5. 
     The host  342  of the second EML  340  can be same as or different from the host  322  of the first EML  320 , and the dopant  344  of the second EML  340  can be same as or different from the dopant  324  of the first EML  320 . 
     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  can 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, since each of the first and second EMLs  320  and  340  includes the host  322  and  342 , each of which is an anthracene derivative, and the dopant  324  and  344 , each of which is a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. As a result, the OLED D and the organic light emitting display device  100  have advantages in the emitting efficiency and the lifespan. 
     In addition, 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 for the organic light emitting display device 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  can be a glass substrate or a plastic substrate. For example, each of the first and second substrates  410  and  470  can be a polyimide substrate. 
     A buffer layer  420  is formed on the 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  can be omitted. 
     A semiconductor layer  422  is formed on the buffer layer  420 . The semiconductor layer  122  can 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  can 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  can 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 can correspond to the driving TFT Td (of  FIG. 1 ). 
     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 can 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 can be further formed. 
     A passivation 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. The first electrode  160  can be an anode and can be formed of a conductive material having a relatively high work function. For example, the first electrode  460  can be formed of a transparent conductive material such as indium-tin-oxide (ITO) or indium-zinc-oxide (IZO). 
     A reflection electrode or a reflection layer can be formed under the first electrode  460 . For example, the reflection electrode or the reflection layer can be formed of aluminum-palladium-copper (APC) alloy. 
     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 red, green and blue pixels RP, GP and BP. The bank layer  466  can be omitted. 
     An organic emitting layer  462  is formed on the first electrode  460 . 
     Referring to  FIG. 6 , the organic emitting layer  462  includes a first emitting part  530  including a first EML  520 , a second emitting part  550  including a second EML  540 , a third emitting part  570  including a third EML  560 , 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 electrode  460  can be formed of a conductive material having a relatively high work function to serve as an anode for injecting a hole into the organic emitting layer  462 . The second electrode  464  can be formed of a conductive material having a relatively low work function to serve as a cathode for injecting an electron into the organic emitting layer  462 . The first electrode  460  can be formed of ITO or IZO, and the second electrode  464  can be formed of Al, Mg, Ag, AlMg or MgAg. 
     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  570 , 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  460  and the second CGL  590 . 
     The first emitting part  530  can include an HIL  532 , a first HTL  534 , a first EBL  536 , the first EML  520  and a first HBL  538  sequentially stacked on the first electrode  460 . Namely, the HIL  532 , the first HTL  534  and the first EBL  536  are positioned between the first electrode  460  and the first EML  520 , and the first HBL  538  is positioned between the first EML  520  and the first CGL  580 . 
     The first EML  520  includes a host  522 , which is an anthracene derivative, and a dopant  524 , which is a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. The first EML  520  provides a blue emission. 
     For example, in the first EML  520 , when the anthracene core of the host  522  is deuterated (e.g., “core-deuterated anthracene derivative”), the dopant  524  can be non-deuterated (e.g., “non-deuterated pyrene derivative”) or all of the pyrene core and a substituent of the dopant  524  can be deuterated (e.g., “wholly-deuterated pyrene derivative”). Alternatively, the pyrene core of the dopant  524  except the substituent can be deuterated (e.g., “core-deuterated pyrene derivative”), or the substituent of the dopant  524  except the pyrene core can be deuterated (e.g., “substituent-deuterated pyrene derivative”). 
     Alternatively, in the first EML  520 , when the pyrene core of the dopant  524  is deuterated (e.g., “core-deuterated pyrene derivative”), the host  522  can be non-deuterated (e.g., “non-deuterated anthracene derivative”) or all of the anthracene core and a substituent of the host  522  can be deuterated (e.g., “wholly-deuterated anthracene derivative”). Alternatively, the anthracene core of the host  522  except the substituent can be deuterated (e.g., “core-deuterated anthracene derivative”), or the substituent of the host  522  except the anthracene core can be deuterated (e.g., “substituent-deuterated anthracene derivative”). 
     In the first EML  520 , the host  522  can have a weight % of about 70 to 99.9, and the dopant  524  can have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency and lifespan, a weight % of the dopant  524  can be about 0.1 to 10, preferably about 1 to 5. 
     The second EML  550  can include a second HTL  552 , the second EML  540  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  can be a yellow-green EML. For example, the second EML  540  can include a host and a yellow-green dopant. Alternatively, the second EML  540  can include a host, a red dopant and a green dopant. In this instance, the second EML  540  can include 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 third emitting part  570  can include a third HTL  572 , a second EBL  574 , the third EML  560 , a second HBL  576  and an EIL  578 . 
     The third EML  560  includes a host  562 , which is an anthracene derivative, a dopant  564 , which is a pyrene derivative, and at least one of an anthracene core of the anthracene derivative and a pyrene core of the pyrene derivative is deuterated. The third EML  560  provides a blue emission. 
     For example, in the third EML  560 , when the anthracene core of the host  562  is deuterated (e.g., “core-deuterated anthracene derivative”), the dopant  564  can be non-deuterated (e.g., “non-deuterated pyrene derivative”) or all of the pyrene core and a substituent of the dopant  564  can be deuterated (e.g., “wholly-deuterated pyrene derivative”). Alternatively, the pyrene core of the dopant  564  except the substituent can be deuterated (e.g., “core-deuterated pyrene derivative”), or the substituent of the dopant  564  except the pyrene core can be deuterated (e.g., “substituent-deuterated pyrene derivative”). 
     Alternatively, in the third EML  560 , when the pyrene core of the dopant  564  is deuterated (e.g., “core-deuterated pyrene derivative”), the host  562  can be non-deuterated (e.g., “non-deuterated anthracene derivative”) or all of the anthracene core and a substituent of the host  562  can be deuterated (e.g., “wholly-deuterated anthracene derivative”). Alternatively, the anthracene core of the host  562  except the substituent can be deuterated (e.g., “core-deuterated anthracene derivative”), or the substituent of the host  562  except the anthracene core can be deuterated (e.g., “substituent-deuterated anthracene derivative”). 
     In the third EML  560 , the host  562  can have a weight % of about 70 to 99.9, and the dopant  564  can have a weight % of about 0.1 to 30. To provide sufficient emitting efficiency and lifespan, a weight % of the dopant  564  can be about 0.1 to 10, preferably about 1 to 5. 
     The host  562  of the third EML  560  can be same as or different from the host  522  of the first EML  520 , and the dopant  564  of the third EML  560  can be same as or different from the dopant  524  of the first EML  520 . 
     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 stacks  530  and  550  are connected through the first CGL  580 , and the second and third emitting stacks  550  and  570  are connected through the second CGL  590 . The first CGL  580  can 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  can 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 host  522  and  562 , each of which is an anthracene derivative, the blue dopant  524  and  564 , each of which is a pyrene derivative. 
     Accordingly, 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. 6 , the OLED D has a triple-stack structure of the first, second and third emitting parts  530 ,  550  and  570 . Alternatively, the OLED D can have a double-stack structure without the first emitting part  530  or the third emitting part  570 . 
     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 color filter layer  480  can be attached to the OLED D by using an adhesive layer. Alternatively, the color filter layer  480  can be formed directly on the OLED D. 
     An encapsulation film can be formed to prevent penetration of moisture into the OLED D. For example, the encapsulation film can 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 can be omitted. 
     A polarization plate for reducing an ambient light reflection can be disposed over the top-emission type OLED D. For example, the polarization plate can be a circular polarization plate. 
     In  FIG. 5 , the light from the OLED D passes through the second electrode  464 , and the color filter layer  480  is disposed on or over the OLED D. Alternatively, when the light from the OLED D passes through the first electrode  460 , the color filter layer  480  can be disposed between the OLED D and the first substrate  410 . 
     A color conversion layer can be formed between the OLED D and the color filter layer  480 . The color conversion layer can 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. 
     As described above, 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  in the red pixel RP, the green pixel GP and the blue pixel BP such that 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 and 6 , the OLED D emitting the white light is used for a display device. Alternatively, the OLED D can 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 can be referred to as an organic light emitting device. 
       FIG. 7  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. 7 , 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 . 
     A color filter can be formed between the second substrate  670  and each color conversion layer  680 . 
     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  can be connected to the drain electrode of the TFT Tr through the drain contact hole  652 . 
     A bank layer  666  covering an edge of the first electrode  660  is formed at a boundary of the red, green and blue pixel regions RP, GP and BP. 
     The OLED D emits a blue light and can 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  can include an inorganic color conversion material such as a quantum dot. 
     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 . 
     While the present disclosure has been described with reference to exemplary embodiments and examples, these embodiments and examples are not intended to limit the scope of the present disclosure. Rather, it will be apparent to those skilled in the art that various modifications and variations can be made in the present disclosure without departing from the spirit or scope of the invention. Thus, it is intended that the present disclosure cover the modifications and variations of the present disclosure provided they come within the scope of the appended claims and their equivalents. 
     The various embodiments described above can be combined to provide further embodiments. All of patents, patent application publications, patent applications, foreign patents, foreign patent applications and non-patent publications referred to in this specification and/or listed in the Application Data Sheet are incorporated herein by reference, in their entirety. Aspects of the embodiments can be modified, if necessary to employ concepts of the various patents, applications and publications to provide yet further embodiments. 
     These and other changes can be made to the embodiments in light of the above-detailed description. In general, in the following claims, the terms used should not be construed to limit the claims to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled. Accordingly, the claims are not limited by the disclosure.