# Patent

## Title
Organic light-emitting device

## Abstract

An organic light-emitting device including a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode, wherein the organic layer includes at least one first material represented by Formula 1 and at least one second material represented by Formula 2:

## Background
CROSS-REFERENCE TO RELATED APPLICATION
Korean Patent Application No. 10-2014-0069566, filed on Jun. 9, 2014, in the Korean Intellectual Property Office, and entitled: “Organic Light-Emitting Device,” is incorporated by reference herein in its entirety.
BACKGROUND
1. Field
Embodiments relate to an organic light-emitting device.
2. Description of the Related Art
Organic light emitting devices are self-emission devices that have wide viewing angles, high contrast ratios, short response times, and excellent brightness, driving voltage, and response speed characteristics, and produce full-color images.
The organic light-emitting device may include a first electrode disposed on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode, which are sequentially disposed on the first electrode. Holes provided from the first electrode may move toward the emission layer through the hole transport region, and electrons provided from the second electrode may move toward the emission layer through the electron transport region. Carriers, such as holes and electrons, may be recombined in the emission layer to produce excitons. These excitons may change from an excited state to a ground state, thereby generating light.
SUMMARY
Embodiments are directed to an organic light-emitting device
One or more embodiments provides an organic light-emitting device including a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, the organic layer includes at least one material selected from first materials represented by Formula 1 and at least one material selected from second materials represented by Formula 2:




wherein in Formulae 1 and 2,
L11, L21, and L22 may be each independently selected from a substituted or unsubstituted C6-C60 arylene group and a substituted or unsubstituted C1-C60 heteroarylene group;
L12 may be selected from a substituted or unsubstituted phenylene group and a substituted or unsubstituted naphthylenyl group;
a11 may be 0 or 1;
a12 may be 1 or 2;
a21 and a22 may be each independently selected from 0, 1, and 2;
R11 and R12 may be each independently selected from a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;
R21 and R22 may be each independently selected from a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolinyl group, and a substituted or unsubstituted isoquinolinyl group;
b11, b12, b21, and b22 may be each independently selected from 1, 2, and 3;
R13, R14, R23, and R24 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C1-C60 heteroaryl group a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q1)(Q2)(Q3);
b13, b14, b23, and b24 may be each independently selected from 1, 2, 3 and 4;
at least one of substituents of the substituted C6-C60 arylene group, the substituted C1-C60 heteroarylene group, the substituted a phenylene group, the substituted naphthylenyl group, the substituted C6-C60 aryl group, the substituted C1-C60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed hetero-polycyclic group, the substituted pyridyl group, the substituted quinolinyl group, the substituted isoquinolinyl group, the substituted C1-C60 alkyl group, the substituted C1-C60 alkoxy group, the substituted C3-C10 cycloalkyl group, and the substituted C6-C60 aryloxy group may be selected from
a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C3-C10 cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q11)(Q12)(Q13);
a C3-C10cycloalkyl group, a C2-C10heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
a C3-C10 cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q21)(Q22)(Q23); and
—Si(Q31)(Q32)(Q33),
Q1 to Q3, Q11 to Q13, Q21 to Q23 and Q31 to Q33 may be each independently selected from a C1-C60 alkyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.



BRIEF DESCRIPTION OF THE DRAWING
Features will be apparent to those of skill in the art by describing in detail exemplary embodiments with reference to the attached drawing in which:
FIG. 1 illustrates a schematic cross-sectional view of an organic light-emitting device according to an embodiment.



DETAILED DESCRIPTION
Example embodiments will now be described more fully hereinafter with reference to the accompanying drawing; however, they may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey exemplary implementations to those skilled in the art.
In the drawing FIGURE, the dimensions of layers and regions may be exaggerated for clarity of illustration. Like reference numerals refer to like elements throughout.
Expressions such as “at least one of,” when preceding a list of elements, modify the entire list of elements and do not modify the individual elements of the list.
As used herein, the singular forms “a,” “an” and “the” are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It will be further understood that the terms “comprises” and/or “comprising” used herein specify the presence of stated features or components, but do not preclude the presence or addition of one or more other features or components.
It will be understood that when a layer, region, or component is referred to as being “on” or “onto” another layer, region, or component, it can be directly or indirectly formed on the other layer, region, or component. That is, for example, intervening layers, regions, or components may be present.
The term “(an organic layer) includes at least one selected from first materials” or “(an organic layer) includes a first material” used herein includes a case in which “(an organic layer) includes one kind of material selected from first materials represented by Formula 1 and a case in which (an organic layer) includes two or more different kinds of materials selected from first materials represented Formula 1”.
In FIG. 1, a substrate may be additionally disposed under a first electrode 110 or above a second electrode 190. The substrate may be a glass substrate or transparent plastic substrate, each with excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water repellency.
The first electrode 110 may be formed by depositing or sputtering a material for forming the first electrode on the substrate. When the first electrode 110 is an anode, the material for the first electrode 110 may be selected from materials with a high work function to facilitate hole injection. The first electrode 110 may be a reflective electrode or a transmissive electrode. The material for the first electrode 110 may be a transparent and highly conductive material, and examples of such a material may include indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), and zinc oxide (ZnO). When the first electrode 110 is a semi-transmissive electrode or a reflective electrode, as a material for forming the first electrode, at least one of magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), magnesium-silver (Mg—Ag) may be used.
The first electrode 110 may have a single-layer structure, or a multi-layer structure including two or more layers. For example, the first electrode 110 may have a three-layered structure of ITO/Ag/ITO, but the structure of the first electrode 110 is not limited thereto.
An organic layer 150 may be disposed on the first electrode 110. The organic layer 150 may include an emission layer.
The organic layer 150 may include at least one selected from first materials represented by Formula 1 and at least one selected from second materials represented by Formula 2. For example, the organic layer 150 may include a first material represented by Formula 1 and a second material represented by Formula 2.




In Formulae 1 and 2,
L11, L21, and L22 may be each independently selected from a substituted or unsubstituted C6-C60 arylene group and a substituted or unsubstituted C1-C60 heteroarylene group;
L12 may be selected from a substituted or unsubstituted phenylene group and a substituted or unsubstituted naphthylenyl group;
a11 may be 0 or 1;
a12 may be 1 or 2;
a21 and a22 may be each independently selected from 0, 1, and 2;
R11 and R12 may be each independently selected from a substituted or unsubstituted C6-C60 aryl group, a substituted or unsubstituted C1-C60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group;
R21 and R22 may be each independently selected from a substituted or unsubstituted pyridyl group, a substituted or unsubstituted quinolinyl group, and a substituted or unsubstituted isoquinolinyl group;
b11, b12, b21, and b22 may be each independently selected from 1, 2, and 3;
R13, R14, R23, and R24 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a substituted or unsubstituted C1-C60 alkyl group, a substituted or unsubstituted C1-C60 alkoxy group, a substituted or unsubstituted C3-C10 cycloalkyl group, a substituted or unsubstituted C1-C60 aryl group, a substituted or unsubstituted C6-C60 aryloxy group, a substituted or unsubstituted C1-C60 heteroaryl group a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, a substituted or unsubstituted monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q1)(Q2)(Q3);
b13, b14, b23, and b24 may be each independently selected from 1, 2, 3 and 4;
at least one of substituents of the substituted C6-C60 arylene group, the substituted C1-C60 heteroarylene group, the substituted a phenylene group, the substituted naphthylenyl group, the substituted C6-C60 aryl group, the substituted C1-C60 heteroaryl group, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed hetero-polycyclic group, the substituted pyridyl group, the substituted quinolinyl group, the substituted isoquinolinyl group, the substituted C1-C60 alkyl group, the substituted C1-C60 alkoxy group, the substituted C3-C10 cycloalkyl group, and the substituted C6-C60 aryloxy group may be selected from
a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid group or a salt thereof, a phosphoric acid group or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C3-C10 cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q11)(Q12)(Q13);
a C3-C10 cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C1-C60 aryl group, a C1-C60 aryloxy group, a C1-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
a C3-C10cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed hetero-polycyclic group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C2-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C2-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed hetero-polycyclic group, and —Si(Q21)(Q22)(Q23); and
—Si(Q31)(Q32)(Q33),
wherein Q1 to Q3, Q11 to Q13, Q21 to Q23 and Q31 to Q33 may be each independently selected from a C1-C60 alkyl group, a C6-C60 aryl group, a C1-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.
For example, L11, L21, and L22 in Formulae 1 and 2 may be each independently selected from a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group; and
a phenylene group, a naphthylene group, a phenanthrenylene group, an anthracenylene group, a triphenylenylene group, a pyrenylene group, a chrysenylene group, a pyrrolylene group, a thiophenylene group, a furanylene group, an imidazolylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, an indolylene group, a quinolinylene group, an isoquinolinylene group, a benzoquinolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a benzofuranylene group, a benzothiophenylene group, a triazolylene group, a tetrazolylene group, a triazinylene group, a dibenzofuranylene group, and a dibenzothiophenylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a thiadiazolyl group, and an imidazopyridinyl group, but they are not limited thereto.
In some embodiments, L11, L21, and L22 in Formulae 1 and 2 may be each independently selected from a phenylene group, a naphthylene group, a pyridinylene group, a quinolinylene group and an isoquinolinylene group; and
a phenylene group, a naphthylene group, a pyridinylene group, a quinolinylene group, and an isoquinolinylene group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C1-C20 alkyl group, a phenyl group, and a naphthyl group, but they are not limited thereto.
In some embodiments, L11, L21, and L22 in Formulae 1 and 2 may be each independently selected from a group represented by any one of Formulae 3-1 to 3-6, but they are not limited thereto.




In Formulae 3-1 to 3-6, * and *′ indicate binding sites to a neighboring atom.
For example, L12 in Formula 1 may be selected from a phenylene group and a naphthylenyl group, but is not limited thereto.
a11 in Formula 1 indicates the number of L11, and when a11 is 0, (L11)a11 may indicate a direct bond.
a12 in Formula 1 indicates the number of L12, and when a12 is 2, a plurality of L12 may be identical or different.
a21 in Formula 2 indicates the number of L21, and when a21 is 2, a plurality of L21 may be identical or different. When a21 is 0, (L21)a21 may indicate a direct bond.
a22 in Formula 2 indicates the number of L22, and when a22 is 2, a plurality of L22 may be identical or different. When a22 is 0, (L22)a22 may indicate a direct bond.
For example, R11 and R12 in Formula 1 may be each independently selected from a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, a azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, a ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, a oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and
a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, but they are not limited thereto.
In some embodiments, R11 and R12 in Formula 1 may be each independently selected from a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C1-C20 alkyl group, a phenyl group, and a naphthyl group, but they are not limited thereto.
In some embodiments, R11 and R12 in Formula 1 may be each independently selected from a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a furanyl group, a thiophenyl group, a carbazolyl group, a benzofuranyl group, a benzothiophenyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a C1-C20 alkyl group, a phenyl group, and a naphthyl group, but they are not limited thereto.
In other embodiments, R11 and R12 in Formula 1 may be each independently selected from a group represented by any one of one of Formulae 4-1 to 4-9 below, but they are not limited thereto.




In Formulae 4-1 to 4-9, * indicates a binding site to a neighboring atom.
For example, R21 and R22 in Formula 2 may be each independently selected from a pyridyl group, a quinolinyl group, and an isoquinolinyl group, but they are not limited thereto.
In some embodiments, R21 and R22 in Formula 2 may be each independently selected from a group represented by any one of one of Formulae 5-1 to 5-17 below, but they are not limited thereto.







In Formulae 5-1 to 5-17, * indicates a binding site to a neighboring atom.
In some embodiments, R21 and R22 in Formula 2 may be each independently a group selected from Formulae 5-1, 5-2, 5-5, and 5-13, but they are not limited thereto.




In Formulae 5-1, 5-2, 5-5, and 5-13, * indicates a binding site to a neighboring atom.
b11, b12, b21 and b22 in Formula 1 and 2 respectively indicate the number of R11, R12, R21, and R22, and when each of b11, b12, b21, and b22 is 2 or 3, a plurality of R11, R12, R21, and R22 may be identical or different.
For example, R13, R14, R23, and R24 in Formulae 1 and 2 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, n-a propyl group, iso-a propyl group, an n-butyl group, a sec-butyl group, iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, an n-octyl group, a phenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a picenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, an ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a carbazolyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, dibenzofuranyl group, a dibenzothiophenyl group, a dibenzosilolyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, but they are not limited thereto.
In some embodiments, R13, R14, R23, and R24 in Formulae 1 and 2 may be each independently selected from a hydrogen, a deuterium, —F, —Cl, —Br, —I, a cyano group, a nitro group, a methyl group, an ethyl group, n-a propyl group, iso-a propyl group, an n-butyl group, a sec-butyl group, iso-butyl group, a tert-butyl group, an n-pentyl group, an n-hexyl group, an n-heptyl group, and an n-octyl group, a group represented by one of Formulae 4-1 to 4-9 and a group represented by one of Formulae 5-1 to 5-17, but they are not limited thereto.










In Formulae 4-1 to 4-9 and 5-1 to 5-17, * indicates a binding site to a neighboring atom.
b13, b14, b23, and b24 in Formula 1 and 2 respectively indicate the number of R13, R14, R23, and R24, and when each of b13, b14, b23, and b24 is selected from 2, 3, and 4, a plurality of R13, R14, R23, and R24 may be identical or different.
For example, the first materials may be represented by any one of Formulae 1A and 1B below, and the second materials may be represented by Formula 2 below, but they are not limited thereto.




In Formulae 1A, 1B, and 2, L11, a11, R11 to R14, b11 to b14, L21, L22, a21, a22, R21 to R24, and b21 to b24 have already described above.
In some embodiments, the first materials may be represented by any one of Formulae 1A and 1B below, and the second materials may be represented by one of Formulae 2A to 2C below, but they are not limited thereto.




In Formulae 1A, 1B, and 2A to 2C, L11, a11, R11 to R14, b11 to b14, L21, L22, a21, a22, R22 to R24, and b22 to b24 have already described above.
In some embodiments, the first materials may be represented by any one of Formulae 1A-1 and 1B-1 below, and the second materials may be represented by one of Formulae 2A to 2C below, but they are not limited thereto.




In Formulae 1A-1, 1B-1, and 2A to 2C, L11, a11, R11 to R14, b11 to b14, L21, L22, a21, a22, R22 to R24, and b22 to b24 have already described above.
In some embodiments, the first materials may be selected from Compounds 100 to 263 below, and the second materials may be selected from Compounds 300 to 397, but they are not limited thereto.














































































































































The second materials represented by Formula 2 may have high electron mobility. The first materials represented by Formula 1 may have higher efficiency in combination with an electron trapping dopant. Generally, in order to stably trap excitons in an emission layer, stability of an electron transporting material may be considered. The second materials represented by Formula 2 may have high stability, and a lifespan of an organic light-emitting device including the second materials may be improved.
Accordingly, an organic emitting device including the first materials represented by Formula 1 and the second materials represented by Formula 2 may have high efficiency and a long lifespan.
The organic layer 150 may further include a hole transport region 130 between the first electrode and the emission layer. The organic layer 150 may further include an electron transport region 180 between the emission layer and the second electrode.
The hole transport region 130 may include at least one selected from a hole injection layer (HIL), a hole transport layer (HTL), a buffer layer, and an electron blocking layer (EBL), and the electron transport region 180 may include at least one selected from a buffer layer, an electron transport layer (ETL), and an electron injection layer (EIL), but they are not limited thereto.
The hole transport region 130 may have a single-layered structure formed of a single material, a single-layered structure formed of a plurality of different materials, or a multi-layered structure having a plurality of layers formed of a plurality of different materials.
For example, the hole transport region 130 may have a single-layered structure formed of a plurality of different materials, or a structure of hole injection layer/hole transport layer, a structure of hole injection layer/hole transport layer/buffer layer, a structure of hole injection layer/buffer layer, a structure of hole transport layer/buffer layer, or a structure of hole injection layer/hole transport layer/electron blocking layer, wherein layers of each structure are sequentially stacked from the first electrode 110 in this stated order, but are not limited thereto.
When the hole transport region 130 includes a hole injection layer, the hole injection layer may be formed on the first electrode 110 by using various methods, such as vacuum deposition, spin coating casting, a Langmuir-Blodgett (LB) method, ink-jet printing, laser-printing, or laser-induced thermal imaging.
When a hole injection layer is formed by vacuum deposition, for example, the vacuum deposition may be performed at a temperature of a deposition temperature of about 100 to about 500° C., at a vacuum degree of about 10−8 to about 10−3 torr, and at a deposition rate of about 0.01 to about 100 Å/sec, in consideration of a compound for a hole injection layer to be deposited, and the structure of a hole injection layer to be formed.
When a hole injection layer is formed by spin coating, the spin coating may be performed at a coating rate of about 2,000 rpm to about 5,000 rpm, and at a temperature of about 80° C. to 200° C., in consideration of a compound for a hole injection layer to be deposited, and the structure of a hole injection layer to be formed.
When the hole transport region 130 includes a hole transport layer, the hole transport layer may be formed on the first electrode 110 or the hole injection layer by using various methods, such as vacuum deposition, spin coating, casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When the hole transport layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the hole transport layer may be determined by referring to the deposition and coating conditions for the hole injection layer.
The hole transport region 130 may include at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB, β-NPB, TPD, Spiro-TPD, Spiro-NPB, α-NPB, TAPC, HMTPD, 4,4′,4′′-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline/dodecylbenzenesulfonic acid (Pani/DBSA), poly(3,4-ethylenedioxythiophene)/poly(4-styrenesulfonate) (PEDOT/PSS), polyaniline/camphor sulfonicacid (Pani/CSA), (polyaniline)/poly(4-styrenesulfonate) (PANI/PSS), a compound represented by Formula 201 below, and a compound represented by Formula 202 below.










In Formulae 201 and 202,
L201 to L205 may be each independently selected from a substituted or unsubstituted C3-C10 cycloalkylene, a substituted or unsubstituted C3-C10 heterocycloalkylene, a substituted or unsubstituted C3-C10 cycloalkenylene, a substituted or unsubstituted C3-C10 heterocycloalkenylene, a substituted or unsubstituted C6-C60 arylene, a substituted or unsubstituted C2-C60 heteroarylene, and a substituted or unsubstituted bivalent non-aromatic condensed polycyclic group,
at least one of substituents of the substituted C3-C10 cycloalkylene, the substituted C3-C10 heterocycloalkylene, substituted C3-C10 cycloalkenylene, substituted C3-C10heterocycloalkenylene, substituted C6-C60 arylene, substituted C2-C60 heteroarylene, and a substituted bivalent non-aromatic condensed polycyclic group may be selected from
a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, and a C1-C60 alkoxy;
a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, and a C1-C60 alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic, a monovalent non-aromatic condensed heteropolycyclic, —N(Q201)(Q202), —Si(Q203)(Q204)(Q205), and —B(Q206)(Q207);
a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C2-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, a C1-C60 alkoxy, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q211)(Q212), —Si(Q213)(Q214)(Q215), and —B(Q216)(Q217); and
—N(Q221)(Q222), —Si(Q223)(Q224)(Q225), and —B(Q226)(Q227),
xa1 to xa4 may be each independently selected from 0, 1, 2, and 3;
xa5 may be selected from 1, 2, 3, 4, and 5; and
R201 to R204 may be each independently selected from
a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, and a C1-C60 alkoxy;
a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, and a C1-C60 alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic, —N(Q231)(Q232), —Si(Q233)(Q234)(Q235), and —B(Q236)(Q237);
a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C2-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; and
a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, a C1-C60 alkoxy, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, —N(Q241)(Q242), —Si(Q243)(Q244)(Q245), and —B(Q246)(Q247),
Q201 to Q207, Q211 to Q217, Q221 to Q227, Q231 to Q237, and Q241 to Q247 may be each independently selected from:
a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group;
a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, and a C1-C60 alkoxy group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C3-C10cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C2-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group;
a C3-C10cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C2-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group; and
a C3-C10cycloalkyl group, a C3-C10heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10 heterocycloalkenyl group, a C1-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C2-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl group, a C2-C60 alkenyl group, a C2-C60 alkynyl group, a C1-C60 alkoxy group, a C3-C10 cycloalkyl group, a C3-C10 heterocycloalkyl group, a C3-C10 cycloalkenyl group, a C3-C10heterocycloalkenyl group, a C6-C60 aryl group, a C6-C60 aryloxy group, a C6-C60 arylthio group, a C2-C60 heteroaryl group, a monovalent non-aromatic condensed polycyclic group, and a monovalent non-aromatic condensed heteropolycyclic group.
wherein in Formulae 201 and 202,
L201 to L205 may be each independently selected from:
a phenylene, a naphthylenylene, a fluorenylene, a spiro-fluorenylene, a benzofluorenylene, a dibenzofluorenylene, a phenanthrenylene, an anthracenylene, a pyrenylene, a chrysenylene, a pyridinylene, a pyrazinylene, a pyrimidinylene, a pyridazinylene, a quinolinylene, an isoquinolinylene, a quinoxalinylene, a quinazolinylene, a carbazolylene, and a triazinylene; and
a phenylene group, a naphthylenylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, a isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group, and a salt thereof, a sulfonic acid, and a salt thereof, a phosphoric acid and a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a isoindolyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
xa1 to xa4 may be each independently 0, 1, or 2;
xa5 may be 1, 2, or 3;
R201 to R205 may be each independently selected from
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, but are not limited thereto.
The compound represented by Formula 201 may be represented by Formula 201A.




For example, the compound represented by Formula 201 may be represented by Formula 201A-1 below, but is not limited thereto.




For example, the compound represented by Formula 202 may be represented by Formula 202A below, but is not limited thereto.




In Formulae 201A, 201A-1, and 202A, L201 to L203, xa1 to xa3, xa5 and R202 to R204 have already been described above, R211 and R212 may be understood by referring to the description provided in connection with R203, and R213 to R216 may be each independently selected from a hydrogen, a deuterium, a halogen atom, a hydroxyl group, cyano, nitro, amino, amidino, hydrazine, a hydrazine group, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, a C1-C60 alkoxy, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, and a non-aromatic condensed polycyclic group.
For example, in Formulae 201A, 201A-1, and 202A,
L201 to L203 may be each independently selected from
a phenylene, a naphthylenylene, a fluorenylene, a spiro-fluorenylene, a benzofluorenylene, a dibenzofluorenylene, a phenanthrenylene, an anthracenylene, a pyrenylene, a chrysenylene, a pyridinylene, a pyrazinylene, a pyrimidinylene, a pyridazinylene, a quinolinylene, an isoquinolinylene, a quinoxalinylene, a quinazolinylene, a carbazolylene, and a triazinylene; and
a phenylene group, a naphthylenylene group, a fluorenylene group, a spiro-fluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a pyrenylene group, a chrysenylene group, a pyridinylene group, a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a quinolinylene group, a isoquinolinylene group, a quinoxalinylene group, a quinazolinylene group, a carbazolylene group, and a triazinylene group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxyl group, and a salt thereof, a sulfonic acid, and a salt thereof, a phosphoric acid and a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
xa1 to xa3 may be each independently 0 or 1;
R203, R211, and R212 may be each independently selected from
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
R213 and R214 may be each independently selected from
a C1-C20 alkyl and a C1-C20 alkoxy;
a C1-C20 alkyl and a C1-C20 alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl, a C1-C20 alkoxy, a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl;
R215 and R216 may be each independently selected from
a hydrogen, a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof,
a C1-C20 alkyl and a C1-C20 alkoxy;
a C1-C20 alkyl and a C1-C20 alkoxy, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group;
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, and a triazinyl group; and
a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl, a C1-C20 alkoxy, a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl; and
xa5 is 1 or 2.
R213 and R214 in Formulae 201A, and 201A-1 may bind to each other to form a saturated or unsaturated ring.
The compound represented by Formula 201, and the compound represented by Formula 202 may each include compounds HT1 to HT20 illustrated below, but are not limited thereto.






















A thickness of the hole transport region 130 may be in a range of about 100 Å to about 10,000 Å, e.g., about 100 Å to about 1000 Å. When the hole transport region 130 includes both a hole injection layer and a hole transport layer, a thickness of the hole injection layer may be in a range of about 100 Å to about 10000 Å, e.g., about 100 Å to about 1000 Å, and a thickness of the hole transport layer may be in a range of about 50 Å to about 2000 Å, e.g., about 100 Å to about 1500 Å. When the thicknesses of the hole transport region 130, the hole injection layer, and the hole transport layer are within these ranges, satisfactory hole transporting characteristics may be obtained without a substantial increase in driving voltage.
The hole transport region 130 may further include, in addition to these materials, a charge-generation material for the improvement of conductive properties. The charge-generation material may be homogeneously or non-homogeneously dispersed in the hole transport region 130.
The charge-generation material may be, e.g., a p-dopant. The p-dopant may be one of a quinone derivative, a metal oxide, and a cyano group-containing compound, but is not limited thereto. For example, non-limiting examples of the p-dopant are a quinone derivative, such as tetracyanoquinonedimethane (TCNQ) or 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinonedimethane (F4-TCNQ); a metal oxide, such as a tungsten oxide or a molybdenum oxide, and Compound HT-D1 illustrated below, but are not limited thereto.




The hole transport region 130 may further include, in addition to the hole injection layer and the hole transport layer, at least one of a buffer layer and an electron blocking layer. The buffer layer may compensate for an optical resonance distance according to a wavelength of light emitted from the emission layer, and light-emission efficiency of a formed organic light-emitting device may be improved. For use as a material included in the buffer layer, materials that are included in the hole transport region 130 may be used. The electron blocking layer may help prevent injection of electrons from the electron transport region 130.
An emission layer may be formed on the first electrode 110 or the hole transport region 130 by using various methods, such as vacuum deposition, spin coating, casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When the emission layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the emission layer may be determined by referring to the deposition and coating conditions for the hole injection layer.
When the organic light-emitting device 10 is a full color organic light-emitting device, the emission layer may be patterned into a red emission layer, a green emission layer, or a blue emission layer, according to a sub pixel. In some embodiments, the emission layer may have a stacked structure of a red emission layer, a green emission layer, and a blue emission layer, or may include a red-light emission material, a green-light emission material, and a blue-light emission material, which are mixed with each other in a single layer, to emit white light. According to another embodiment, the emission layer may be a white emission layer, and may further include a color converting layer or a color filter to turn white light into light of a desired color.
The emission layer may include a host and a dopant.
The host may include at least one first material represented by Formula 1.
The dopant may be at least one selected from a fluorescent dopant and a phosphorescent dopant.
The fluorescent dopant may include a compound represented by Formula 501 below.




In Formula 501,
Ar501 may be selected from:
a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene; and
a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from a deuterium, —F, —Cl, —Br, —I, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, a C1-C60 alkoxy, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, and —Si(Q501)(Q502)(Q503) (Q501 to Q503 may be each independently selected from a hydrogen, a C1-C60 alkyl, a C2-C60 alkenyl, a C6-C60 aryl, and a C2-C60 heteroaryl);
L501 to L503 may be understood by referring to the description provided herein in connection with L201;
R501 and R502 may be each independently selected from
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and
a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, and a triazinyl, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano, a nitro, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl, a C1-C20 alkoxy, a phenyl, a naphthyl, a fluorenyl, a spiro-fluorenyl, a benzofluorenyl, a dibenzofluorenyl, a phenanthrenyl, an anthracenyl, a pyrenyl, a chrysenyl, a pyridinyl, a pyrazinyl, a pyrimidinyl, a pyridazinyl, a quinolinyl, an isoquinolinyl, a quinoxalinyl, a quinazolinyl, a carbazolyl, a triazinyl, a dibenzofuranyl, and a dibenzothiophenyl; and
xd1 to xd3 may be each independently selected from 0, 1, 2, and 3; and
xd4 may be selected from 1, 2, 3, and 4.
The fluorescent dopant may include at least one of Compounds FD1 to FD8:










An amount of the dopant in the emission layer may be, e.g., in a range of about 0.01 to about 15 parts by weight based on 100 parts by weight of the host, but is not limited thereto.
A thickness of the emission layer may be in a range of about 100 Å to about 1,000 Å, e.g., about 200 Å to about 600 Å. When the thickness of the emission layer is within this range, excellent light-emission characteristics may be obtained without a substantial increase in driving voltage.
Then, the electron transport region 180 may be disposed on the emission layer.
The electron transport region 180 may include at least one selected from a buffer layer, an electron transport layer (ETL), and an electron injection layer, but is not limited thereto.
For example, the electron transport region 180 may have an electron transport layer alone, a structure of electron transport layer/electron injection layer, or a structure of buffer layer/electron transport layer/electron injection layer, wherein layers of each structure are sequentially stacked from the emission layer in this stated order, but is not limited thereto.
The electron transport region 180 may include a buffer layer. The buffer layer may be formed, when the emission layer includes a phosphorescent dopant, to help prevent diffusion of excitons or holes into an electron transport layer.
When the electron transport region 180 includes the buffer layer, the buffer layer may be formed on the emission layer by using various methods, such as vacuum deposition, spin coating casting, a Langmuir-Blodgett (LB) method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When the buffer layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the buffer layer may be determined by referring to the deposition and coating conditions for the hole injection layer.
In an implementation, the buffer layer may include, e.g., at least one second material represented by Formula 2.
A thickness of the buffer layer may be in a range of about 20 Å to about 1,000 Å, e.g., about 30 Å to about 300 Å. When the thickness of the hole blocking layer is within these ranges, the hole blocking layer may have excellent hole blocking characteristics without a substantial increase in driving voltage.
The electron transport region 180 may include an electron transport layer. The electron transport layer may be formed on the emission layer or the buffer layer by using various methods, e.g., vacuum deposition, spin coating casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When an electron transport layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the electron transport layer may be determined by referring to the deposition and coating conditions for the hole injection layer.
The electron transport layer may include at least one selected from a second material represented by Formula 2, BCP, Bphen, Alq3, Balq, TAZ, NTAZ, and a compound represented by Formula 601 below.




Ar601-[(L601)xe1-E601]xe2 
In Formula 601,
Ar601 may be selected from
a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene; and
a naphthalene, a heptalene, a fluorenene, a spiro-fluorene, a benzofluorene, a dibenzofluorene, a phenalene, a phenanthrene, an anthracene, a fluoranthene, a triphenylene, a pyrene, a chrysene, a naphthacene, a picene, a perylene, a pentaphene, and an indenoanthracene, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl, a cyano group, a nitro group, an amino, an amidino, a hydrazine, a hydrazone, a carboxylic acid and a salt thereof, a sulfonic acid and a salt thereof, a phosphoric acid and a salt thereof, a C1-C60 alkyl, a C2-C60 alkenyl, a C2-C60 alkynyl, a C1-C60 alkoxy, a C3-C10 cycloalkyl, a C3-C10 heterocycloalkyl, a C3-C10 cycloalkenyl, a C3-C10 heterocycloalkenyl, a C6-C60 aryl, a C6-C60 aryloxy, a C6-C60 arylthio, a C2-C60 heteroaryl, a non-aromatic condensed polycyclic group, and —Si(Q301)(Q302)(Q303) (Q301 to Q303 may be each independently selected from a hydrogen, a C1-C60 alkyl, a C2-C60 alkenyl, a C6-C60 aryl, and a C2-C60 heteroaryl);
L601 may be understood by referring to the description provided in connection with L201;
E601 may be selected from
a pyrrolyl group, a thiophenyl group, a furanyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, an isoindolyl group, an indolyl group, an indazolyl group, a purinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, an isobenzothiazolyl group, a benzooxazolyl group, an isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, an oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group; and
a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, a isothiazolyl group, a oxazolyl group, a isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a isoindolyl group, a indolyl group, a indazolyl group, a purinyl group, a quinolinyl group, a isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, a acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a isobenzothiazolyl group, a benzooxazolyl group, a isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, a oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, and a dibenzocarbazolyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a pentalenyl group, a indenyl group, a naphthyl group, a azulenyl group, a heptalenyl group, a indacenyl group, a acenaphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenalenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a chrysenyl group, a naphthacenyl group, a pycenyl group, a perylenyl group, a pentaphenyl group, a hexacenyl group, a pentacenyl group, a rubicenyl group, a coronenyl group, a ovalenyl group, a pyrrolyl group, a thiophenyl group, a furanyl group, a imidazolyl group, a pyrazolyl group, a thiazolyl group, a isothiazolyl group, a oxazolyl group, a isoxazolyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a isoindolyl group, a indolyl group, a indazolyl group, a purinyl group, a quinolinyl group, a isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a carbazolyl group, a phenanthridinyl group, a acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, a benzofuranyl group, a benzothiophenyl group, a isobenzothiazolyl group, a benzooxazolyl group, a isobenzooxazolyl group, a triazolyl group, a tetrazolyl group, a oxadiazolyl group, a triazinyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and
xe1 may be selected from 0, 1, 2, and 3; and
xe2 may be selected from 1, 2, 3, and 4.
In some embodiments, the electron transport layer may further include at least one of compounds represented by Formula 602 below.




In Formula 602,
X611 may be N or C-(L611)xe611-R611, X612 may be N or C-(L612)xe612-R612, X613 may be N or C-(L613)xe613-R613, and at least one of X611 to X613 may be N;
L611 to L616 may be understood by referring to the description provided herein in connection with L201;
R611 and R616 may be each independently selected from
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
a phenyl group, a naphthyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group, each substituted with at least one selected from a deuterium, a halogen atom, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazine group, a hydrazone group, a carboxylic acid group or a salt thereof, a sulfonic acid or a salt thereof, a phosphoric acid or a salt thereof, a C1-C20 alkyl group, a C1-C20 alkoxy group, a phenyl group, a naphthyl group, an azulenyl group, a fluorenyl group, a spiro-fluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a pyrenyl group, a chrysenyl group, a pyridinyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolinyl group, a isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, and a triazinyl group; and
xe611 to xe616 may be each independently selected from 0, 1, 2, and 3.
The compound represented by Formula 601 and the compound represented by Formula 602 may include at least one of Compounds ET1 to ET15 illustrated below.
















A thickness of the electron transport layer may be in a range of about 100 Å to about 1,000 Å, e.g., about 150 Å to about 500 Å. When the thickness of the electron transport layer is within the range described above, the electron transport layer may have satisfactory electron transport characteristics without a substantial increase in driving voltage.
In an implementation, the electron transport layer may further include, in addition to the materials described above, a metal-containing material.
The metal-containing material may include a Li complex. The Li complex may include, e.g., Compound ET-D1 (lithium quinolate, LiQ) or ET-D2.




The electron transport region 180 may include an electron injection layer that allows electrons to be easily provided from the second electrode 190.
The electron injection layer may be formed on the electron transport layer by using various methods, such as vacuum deposition, spin coating casting, a LB method, ink-jet printing, laser-printing, or laser-induced thermal imaging. When an electron injection layer is formed by vacuum deposition or spin coating, deposition and coating conditions for the electron injection layer may be determined by referring to the deposition and coating conditions for the hole injection layer.
The electron injection layer may include at least one selected from, LiF, NaCl, CsF, Li2O, BaO, and LiQ.
A thickness of the electron injection layer may be in a range of about 1 Å to about 100 Å, e.g., about 3 Å to about 90 Å. When the thickness of the electron injection layer is within the range described above, the electron injection layer may have satisfactory electron injection characteristics without a substantial increase in driving voltage.
The second electrode 190 may be disposed on the organic layer 150 having such a structure. The second electrode 190 may be a cathode, which is an electron injection electrode, and in this regard, a material for the second electrode 190 may include a metal, an alloy, an electrically conductive compound, and a mixture thereof, which have a relatively low work function. Detailed examples of the second electrode 190 may include lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al—Li), calcium (Ca), magnesium-indium (Mg—In), or magnesium-silver (Mg—Ag). According to another embodiment, the material for forming the second electrode 190 may include ITO or IZO. The second electrode 190 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode.
Hereinbefore, the organic light-emitting device has been described with reference to FIG. 1, but is not limited thereto.
A C1-C60 alkyl group used herein refers to a linear or branched aliphatic hydrocarbon monovalent group having 1 to 60 carbon atoms, and detailed examples thereof are a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a ter-butyl group, a pentyl group, an iso-amyl group, and a hexyl group. A C1-C60 alkylene group used herein refers to a divalent group having the same structure as the C1-C60 alkyl group.
A C1-C60 alkoxy group used herein refers to a monovalent group represented by —OA101 (wherein A101 is the C1-C60 alkyl group), and detailed examples thereof are a methoxy group, an ethoxy group, and an isopropyloxy group.
A C2-C60 alkenyl group used herein refers to a hydrocarbon group formed by substituting at least one carbon double bond in the middle or terminal of the C2-C60 alkyl group, and detailed examples thereof are an ethenyl group, a prophenyl group, and a butenyl group. A C2-C60 alkenylene group used herein refers to a divalent group having the same structure as the C2-C60 alkenyl group.
A C2-C60 alkynyl group used herein refers to a hydrocarbon group formed by substituting at least one carbon triple bond in the middle or terminal of the C2-C60 alkyl group, and detailed examples thereof are an ethynyl group, and a propynyl group. A C2-C60 alkynylene group used herein refers to a divalent group having the same structure as the C2-C60 alkynyl group.
A C3-C10 cycloalkyl group used herein refers to a monovalent hydrocarbon monocyclic group having 3 to 10 carbon atoms, and detailed examples thereof are a cyclopropyl group, a cyclobutyl group, a cyclopentyl group, a cyclohexyl group, and a cycloheptyl group. A C3-C10 cycloalkylene group used herein refers to a divalent group having the same structure as the C3-C10 cycloalkyl group.
A C2-C10 heterocycloalkyl group used herein refers to a monovalent monocyclic group having at least one hetero atom selected from N, O, P, and S as a ring-forming atom and 2 to 10 carbon atoms, and detailed examples thereof are a tetrahydrofuranyl group, and a tetrahydrothiophenyl group. A C2-C10 heterocycloalkylene group used herein refers to a divalent group having the same structure as the C2-C10 heterocycloalkyl group.
A C3-C10 cycloalkenyl group used herein refers to a monovalent monocyclic group that has 3 to 10 carbon atoms and at least one double bond in the ring thereof and does not have aromacity, and detailed examples thereof are a cyclopentenyl group, a cyclohexenyl group, and a cycloheptenyl group. A C3-C10 cycloalkenylene group used herein refers to a divalent group having the same structure as the C3-C10 cycloalkenyl group.
A C2-C10 heterocycloalkenyl group used herein refers to a monovalent monocyclic group that has at least one hetero atom selected from N, O, P, and S as a ring-forming atom, 2 to 10 carbon atoms, and at least one double bond in its ring. Detailed examples of the C2-C10 heterocycloalkenyl group are a 2,3-hydrofuranyl group and a 2,3-hydrothiophenyl group. A C2-C10 heterocycloalkenylene group used herein refers to a divalent group having the same structure as the C2-C10 heterocycloalkenyl group.
A C6-C60 aryl group used herein refers to a monovalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms, and a C6-C60 arylene group used herein refers to a divalent group having a carbocyclic aromatic system having 6 to 60 carbon atoms. Detailed examples of the C6-C60 aryl group are a phenyl group, a naphthyl group, an anthracenyl group, a phenanthrenyl group, a pyrenyl group, and a chrysenyl group. When the C6-C60 aryl group and the C6-C60 arylene group each include two or more rings, the rings may be fused to each other.
A C2-C60 heteroaryl group used herein refers to a monovalent group having a carboncyclic aromatic system that has at least one hetero atom selected from N, O, P, and S as a ring-forming atom, and 2 to 60 carbon atoms. A C2-C60 heteroarylene group used herein refers to a divalent group having a carbocyclic aromatic system that has at least one hetero atom selected from N, O, P, and S as a ring-forming atom, and 2 to 60 carbon atoms. Examples of the C2-C60 heteroaryl group are a pyridinyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, and an isoquinolinyl group. When the C2-C60 heteroaryl group and the C2-C60 heteroarylene group each include two or more rings, the rings may be fused to each other.
A C6-C60 aryloxy group used herein indicates —OA102 (wherein A102 is the C6-C60 aryl group), and a C6-C60 arylthio group indicates —SA103 (wherein A103 is the C6-C60 aryl group).
A monovalent non-aromatic condensed polycyclic group used herein refers to a monovalent group that has two or more rings condensed to each other, only carbon atoms (for example, the number of carbon atoms may be in a range of 8 to 60) as a ring forming atom, and non-aromacity in the entire molecular structure. An example of the monovalent non-aromatic condensed polycyclic group is a fluorenyl group. A divalent non-aromatic condensed polycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed polycyclic group.
A monovalent non-aromatic condensed heteropolycyclic group used herein refers to a monovalent group that has two or more rings condensed to each other, has a heteroatom selected from N, O P, and S, other than carbon atoms (for example, the number of carbon atoms may be in a range of 2 to 60), as a ring forming atom, and has non-aromacity in the entire molecular structure. An example of the monovalent non-aromatic condensed heteropolycyclic group is a carbazolyl group. A divalent non-aromatic condensed heteropolycyclic group used herein refers to a divalent group having the same structure as the monovalent non-aromatic condensed heteropolycyclic group.
The term “Ph” used herein refers to phenyl group, the term “Me” used herein refers to methyl group, the term “Et” used herein refers to ethyl group, and the term “ter-Bu” or “But” used herein refers to tert-butyl.
Hereinafter, an organic light-emitting device according to an embodiment will be described in detail with reference to Synthesis Examples and Examples. The wording “B was used instead of A” used in describing Synthesis Examples means that a molar equivalent of A was identical to a molar equivalent of B.
The following Examples and Comparative Examples are provided in order to highlight characteristics of one or more embodiments, but it will be understood that the Examples and Comparative Examples are not to be construed as limiting the scope of the embodiments, nor are the Comparative Examples to be construed as being outside the scope of the embodiments. Further, it will be understood that the embodiments are not limited to the particular details described in the Examples and Comparative Examples.
EXAMPLE
















EXAMPLE 1
An anode was prepared by cutting a Corning 15 Ωcm2 (1,200 Å) ITO glass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning the glass substrate by using isopropyl alcohol and pure water for 5 minutes each, and then irradiating UV light for 30 minutes thereto and exposing to ozone to clean. Then, the anode was loaded into a vacuum deposition apparatus.
Compound HT13 was vacuum deposited on the substrate to form a hole injection layer having a thickness of 500 Å. Then, compound HT3, which is a hole transportable compound, was vacuum deposited thereon to form a hole transport layer having a thickness of 450 Å. Then, Compound 100A and FD1 were co-deposited at a ratio of 95:5 to form an emission layer having a thickness of 300 Å.
Then, Compound 200B was deposited on the emission layer to form an electron transport layer having a thickness of 250 Å. Then, LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å. Al was vacuum deposited thereon to a thickness of 1500 Å (cathode), thereby completing the manufacturing of an organic light-emitting device.
EXAMPLE 2
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 3
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 202B was used instead of Compound 200B.
EXAMPLE 4
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 203B was used instead of Compound 200B.
EXAMPLE 5
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 204B was used instead of Compound 200B.
EXAMPLE 6
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 205B was used instead of Compound 200B.
EXAMPLE 7
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 206B was used instead of Compound 200B.
EXAMPLE 8
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound 207B was used instead of Compound 200B.
EXAMPLE 9
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 101A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 10
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 102A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 11
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 103A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 12
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 104A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 13
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 105A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 14
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 106A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 15
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 107A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 16
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 108A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 17
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A.
EXAMPLE 18
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 19
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 202B was used instead of Compound 200B.
EXAMPLE 20
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 203B was used instead of Compound 200B.
EXAMPLE 21
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 204B was used instead of Compound 200B.
EXAMPLE 22
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 205B was used instead of Compound 200B.
EXAMPLE 23
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 206B was used instead of Compound 200B.
EXAMPLE 24
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 207B was used instead of Compound 200B.
EXAMPLE 25
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 110A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 26
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 111A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 27
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 112A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 28
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 113A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 29
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 114A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 30
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 115A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
COMPARATIVE EXAMPLE 1
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound H1, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.




COMPARATIVE EXAMPLE 2
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound H2, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.




COMPARATIVE EXAMPLE 3
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound E1, below, was used instead of Compound 200B.




COMPARATIVE EXAMPLE 4
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an electron transport layer, Compound E2, below, was used instead of Compound 200B.




COMPARATIVE EXAMPLE 5
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E1 was used instead of Compound 200B.
COMPARATIVE EXAMPLE 6
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound 109A, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E2 was used instead of Compound 200B.
COMPARATIVE EXAMPLE 7
An organic light-emitting device was manufactured in the same manner as in Example 1, except that in forming an emission layer, Compound H3, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E3 was used instead of Compound 200B.




EXAMPLE 31
An anode was prepared by cutting a Corning 15 Ωcm2 (1,200 Å) ITO glass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning the glass substrate by using isopropyl alcohol and pure water for 5 minutes each, and then irradiating UV light for 30 minutes thereto and exposing to ozone to clean. Then, the anode was loaded into a vacuum deposition apparatus.
Compound HT13 was vacuum deposited on the substrate to form a hole injection layer having a thickness of 500 Å. Then, compound HT3, which is a hole transportable compound, was vacuum deposited thereon to form a hole transport layer having a thickness of 450 Å. Then, Compound 100A and FD1 were co-deposited at a ratio of 95:5 to form an emission layer having a thickness of 300 Å.
Then, Compound 200B and Liq were deposited at a weight ratio of 50:50 on the emission layer to form an electron transport layer having a thickness of 250 Å, and then, LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å, and Al was vacuum deposited thereon to a thickness of 1,500 Å (cathode), thereby completing the manufacturing of an organic light-emitting device.
EXAMPLE 32
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 33
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 202B was used instead of Compound 200B.
EXAMPLE 34
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 203B was used instead of Compound 200B.
EXAMPLE 35
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 204B was used instead of Compound 200B.
EXAMPLE 36
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 205B was used instead of Compound 200B.
EXAMPLE 37
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 206B was used instead of Compound 200B.
EXAMPLE 38
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound 207B was used instead of Compound 200B.
EXAMPLE 39
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A.
EXAMPLE 40
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 41
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 202B was used instead of Compound 200B.
EXAMPLE 42
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 203B was used instead of Compound 200B.
EXAMPLE 43
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 204B was used instead of Compound 200B.
EXAMPLE 44
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 205B was used instead of Compound 200B.
EXAMPLE 45
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 206B was used instead of Compound 200B.
EXAMPLE 46
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 207B was used instead of Compound 200B.
COMPARATIVE EXAMPLE 8
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound H1, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.




COMPARATIVE EXAMPLE 9
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound H2, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.




COMPARATIVE EXAMPLE 10
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound E1, below, was used instead of Compound 200B.




COMPARATIVE EXAMPLE 11
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an electron transport layer, Compound E2, below, was used instead of Compound 200B.




COMPARATIVE EXAMPLE 12
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E1 was used instead of Compound 200B.
Comparative Example 13
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E2 was used instead of Compound 200B.
Comparative Example 14
An organic light-emitting device was manufactured in the same manner as in Example 31, except that in forming an emission layer, Compound H3, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E3 was used instead of Compound 200B.




EXAMPLE 47
An anode was prepared by cutting a Corning 15 Ωcm2 (1,200 Å) ITO glass substrate to a size of 50 mm×50 mm×0.7 mm, ultrasonically cleaning the glass substrate by using isopropyl alcohol and pure water for 5 minutes each, and then irradiating UV light for 30 minutes thereto and exposing to ozone to clean. Then, the anode was loaded into a vacuum deposition apparatus.
Compound HT13 was vacuum deposited on the substrate to form a hole injection layer having a thickness of 500 Å. Then, compound HT3, which is a hole transportable compound, was vacuum deposited thereon to form a hole transport layer having a thickness of 450 Å. Then, Compound 100A and FD1 were co-deposited at a ratio of 95:5 to form an emission layer having a thickness of 300 Å.
Then, Compound 200B was deposited on the emission layer to form a buffer layer having a thickness of 100 Å. Then, BPhen and Liq were deposited at a weight ratio of 50:50 on the buffer layer to form an electron transport layer having a thickness of 150 Å. Then, LiF, which is a halogenated alkali metal, was deposited on the electron transport layer to form an electron injection layer having a thickness of 10 Å. Al was vacuum deposited thereon to a thickness of 1500 Å (cathode), thereby completing the manufacturing of an organic light-emitting device.
EXAMPLE 48
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 49
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 202B was used instead of Compound 200B.
EXAMPLE 50
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 203B was used instead of Compound 200B.
EXAMPLE 51
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 204B was used instead of Compound 200B.
EXAMPLE 52
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 205B was used instead of Compound 200B.
EXAMPLE 53
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 206B was used instead of Compound 200B.
EXAMPLE 54
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound 207B was used instead of Compound 200B.
EXAMPLE 55
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 101A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 56
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 102A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 57
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 103A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 58
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 104A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 59
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 105A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 60
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 106A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 61
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 107A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 62
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 108A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 63
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A.
EXAMPLE 64
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 65
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 202B was used instead of Compound 200B.
EXAMPLE 66
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 203B was used instead of Compound 200B.
EXAMPLE 67
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 204B was used instead of Compound 200B.
EXAMPLE 68
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 205B was used instead of Compound 200B.
EXAMPLE 69
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 206B was used instead of Compound 200B.
EXAMPLE 70
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound 207B was used instead of Compound 200B.
EXAMPLE 71
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 110A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 72
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 111A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 73
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 112A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 74
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 113A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 75
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 114A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
EXAMPLE 76
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 115A was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.
COMPARATIVE EXAMPLE 15
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound H1, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.




COMPARATIVE EXAMPLE 16
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound H2, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound 201B was used instead of Compound 200B.




COMPARATIVE EXAMPLE 17
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound E1, below, was used instead of Compound 200B.




COMPARATIVE EXAMPLE 18
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an electron transport layer, Compound E2, below, was used instead of Compound 200B.




COMPARATIVE EXAMPLE 19
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E1 was used instead of Compound 200B.
COMPARATIVE EXAMPLE 20
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound 109A was used instead of Compound 100A, and in forming an electron transport layer, Compound E2 was used instead of Compound 200B.
COMPARATIVE EXAMPLE 21
An organic light-emitting device was manufactured in the same manner as in Example 47, except that in forming an emission layer, Compound H3, below, was used instead of Compound 100A, and in forming an electron transport layer, Compound E3 was used instead of Compound 200B.




EVALUATION EXAMPLE
Efficiency (at a current density of 10 mA/cm2) and a lifespan T80 (at a current density of 50 mA/cm2) of the organic light-emitting devices of Examples 1 to 76 and Comparative Examples 1 to 21 were evaluated by using PR650 Spectroscan Source Measurement Unit. (product of PhotoResearch Co., Ltd). T80 indicates a time period taken until brightness reduces to 80% of the initial brightness. Results thereof are shown in Tables 1 to 3, below.











TABLE 1







Electron
Efficiency
T80


Example
Emission layer
transport layer
(cd/A)
(hours)



















Example 1
100A
200B
5.4
130


Example 2
100A
201B
5.4
140


Example 3
100A
202B
5.7
100


Example 4
100A
203B
5.4
120


Example 5
100A
204B
5.8
110


Example 6
100A
205B
5.5
110


Example 7
100A
206B
5.6
120


Example 8
100A
207B
5.7
110


Example 9
101A
201B
5.5
130


Example 10
102A
201B
5.8
100


Example 11
103A
201B
5.6
110


Example 12
104A
201B
5.5
120


Example 13
105A
201B
5.7
100


Example 14
106A
201B
5.2
140


Example 15
107A
201B
5.3
130


Example 16
108A
201B
5.5
100


Example 17
109A
200B
5.5
140


Example 18
109A
201B
5.6
110


Example 19
109A
202B
5.6
100


Example 20
109A
203B
5.5
130


Example 21
109A
204B
5.9
100


Example 22
109A
205B
5.6
110


Example 23
109A
206B
5.9
100


Example 24
109A
207B
5.8
110


Example 25
110A
201B
5.6
120


Example 26
111A
201B
5.9
110


Example 27
112A
201B
5.4
110


Example 28
113A
201B
5.4
120


Example 29
114A
201B
5.8
100


Example 30
115A
201B
5.3
110


Comparative
H1
201B
5.0
60


Example 1


Comparative
H2
201B
4.8
70


Example 2


Comparative
100A
E1
5.2
90


Example 3


Comparative
100A
E2
5.3
100


Example 4


Comparative
109A
E1
5.2
90


Example 5


Comparative
109A
E2
5.3
100


Example 6


Comparative
H3
E3
5.4
90


Example 7




















TABLE 2







Electron
Efficiency
Life span


Example
Emission layer
transport layer
(cd/A)
(hours)



















Example 31
100A
200B:Liq
5.3
170


Example 32
100A
201B:Liq
5.4
130


Example 33
100A
202B:Liq
5.6
110


Example 34
100A
203B:Liq
5.5
140


Example 35
100A
204B:Liq
5.5
120


Example 36
100A
205B:Liq
5.6
110


Example 37
100A
206B:Liq
5.3
120


Example 38
100A
207B:Liq
5.4
120


Example 39
109A
200B:Liq
5.4
160


Example 40
109A
201B:Liq
5.5
120


Example 41
109A
202B:Liq
5.6
120


Example 42
109A
203B:Liq
5.4
140


Example 43
109A
204B:Liq
5.6
110


Example 44
109A
205B:Liq
5.4
120


Example 45
109A
206B:Liq
5.8
110


Example 46
109A
207B:Liq
5.7
120


Comparative
109A
201B:Liq
4.9
60


Example 8


Comparative
109A
201B:Liq
4.6
70


Example 9


Comparative
100A
E1:Liq
5.0
90


Example 10


Comparative
100A
E2:Liq
5.1
100


Example 11


Comparative
109A
E1:Liq
5.0
90


Example 12


Comparative
109A
E2:Liq
5.1
100


Example 13


Comparative
H3
E3:Liq
5.2
100


Example 14





















TABLE 3










Life



Emission
Buffer
Electron
Efficiency
span


Example
layer
layer
transport layer
(cd/A)
(hours)




















Example 47
100A
200B
BPhen:Liq
5.4
150


Example 48
100A
201B
BPhen:Liq
5.3
160


Example 49
100A
202B
BPhen:Liq
5.5
110


Example 50
100A
203B
BPhen:Liq
5.3
130


Example 51
100A
204B
BPhen:Liq
5.6
110


Example 52
100A
205B
BPhen:Liq
5.4
120


Example 53
100A
206B
BPhen:Liq
5.6
130


Example 54
100A
207B
BPhen:Liq
5.6
130


Example 55
101A
201B
BPhen:Liq
5.6
140


Example 56
102A
201B
BPhen:Liq
5.9
120


Example 57
103A
201B
BPhen:Liq
5.6
120


Example 58
104A
201B
BPhen:Liq
5.7
140


Example 59
105A
201B
BPhen:Liq
5.5
110


Example 60
106A
201B
BPhen:Liq
5.3
160


Example 61
107A
201B
BPhen:Liq
5.4
140


Example 62
108A
201B
BPhen:Liq
5.6
130


Example 63
109A
200B
BPhen;Liq
5.6
160


Example 64
109A
201B
BPhen:Liq
5.5
120


Example 65
109A
202B
BPhen:Liq
5.7
110


Example 66
109A
203B
BPhen:Liq
5.6
150


Example 67
109A
204B
BPhen:Liq
6.0
110


Example 68
109A
205B
BPhen:Liq
5.6
110


Example 69
109A
206B
BPhen:Liq
5.9
100


Example 70
109A
207B
BPhen:Liq
5.9
120


Example 71
110A
201B
BPhen:Liq
5.5
130


Example 72
111A
201B
BPhen:Liq
5.9
120


Example 73
112A
201B
BPhen:Liq
5.5
110


Example 74
113A
201B
BPhen:Liq
5.6
130


Example 75
114A
201B
BPhen:Liq
5.9
110


Example 76
115A
201B
BPhen:Liq
5.4
120


Comparative
109A
200B
BPhen:Liq
4.9
70


Example 15


Comparative
109A
201B
BPhen:Liq
5.0
80


Example 16


Comparative
100A
E1
BPhen:Liq
5.4
100


Example 17


Comparative
100A
E2
BPhen:Liq
5.4
110


Example 18


Comparative
109A
E1
BPhen:Liq
5.4
100


Example 19


Comparative
109A
E2
BPhen:Liq
5.4
110


Example 20


Comparative
H3
E3
BPhen:Liq
5.4
100


Example 21









As may be seen in Table 1 to 3, the organic light-emitting devices of Examples 1 to 76 exhibited higher efficiency and longer lifespan than the organic light-emitting devices of Comparative Examples 1 to 21.
Organic light-emitting devices according to the embodiments may have high efficiency and long lifespan characteristics.
Example embodiments have been disclosed herein, and although specific terms are employed, they are used and are to be interpreted in a generic and descriptive sense only and not for purpose of limitation. In some instances, as would be apparent to one of ordinary skill in the art as of the tiling of the present application, features, characteristics, and/or elements described in connection with a particular embodiment may be used singly or in combination with features, characteristics, and/or elements described in connection with other embodiments unless otherwise specifically indicated. Accordingly, it will be understood by those of skill in the art that various changes in form and details may be made without departing from the spirit and scope of the present invention as set forth in the following claims.

## Claims

1. An organic light-emitting device, comprising:
a first electrode;
a second electrode facing the first electrode; and
an organic layer between the first electrode and the second electrode, wherein the organic layer includes:
a first material represented by any one of Formulae 1A and 1B below,
a second material represented by any one of Formulae 2A to 2C below,




wherein in Formulae 1A 1B, and 2A to 2C,
L11, L21, and L22 are each independently selected from a group represented by any one of Formulae 3-1 to 3-6 below:





wherein, in Formulae 3-1 to 3-6, * and *′ indicate binding sites to a neighboring atom;
a11 is 0 or 1;
a21 and a22 are each independently selected from 0, 1, and 2;
R11 and R12 are each independently selected from a group represented by any one of Formulae 4-1 to 4-9 below:





wherein, in Formulae 4-1 to 4-9, * indicates a binding site to a neighboring atom;
R22 is selected from a pyridyl group, a quinolinyl group, and an isoquinolinyl group;
b11, b12, b21, and b22 are 1;
R13, R14, R23, and R24 are a hydrogen; and
b13, b14, b23, and b24 are 4.

2. The organic light-emitting device as claimed in claim 1, wherein R22 is a group represented by any one of Formulae 5-1 to 5-17 below:






wherein in Formulae 5-1 to 5-17, * indicates a binding site to a neighboring atom.

3. The organic light-emitting device as claimed in claim 1, wherein R22 is a group represented by any one of Formulae 5-1, 5-2, 5-5, and 5-13 below:



in Formulae 5-1, 5-2, 5-5, and 5-13, * indicates a binding site to a neighboring atom.

4. The organic light-emitting device as claimed in claim 1, wherein:
the first material is represented by any one of Formulae 1A-1 and 1B-1 below,
the second material is represented by any one of Formulae 2A to 2C below,




wherein in Formulae 1A-1, 1B-1, and 2A to 2C, L11, a11, R11 to R14, b11 to b14, L21, L22, a21, a22, R22 to R24, and b22 to b24 are the same as defined with respect to Formulae 1A and 1B and 2A to 2C.

5. The organic light-emitting device as claimed in claim 1, wherein:
the first material is selected from Compounds 100 to 263 below, and
the second material is selected from Compounds 300 to 401, below,

6. The organic light-emitting device as claimed in claim 1, wherein:
the organic layer includes:
an emission layer, and

an electron transport region between the second electrode and the emission layer,
the emission layer includes the at least one first material, and
the electron transport region includes the at least one second material.

7. The organic light-emitting device as claimed in claim 6, wherein:
the electron transport region includes an electron transport layer, and
the electron transport layer includes the at least one second material.

8. The organic light-emitting device as claimed in claim 6, wherein:
the electron transport region includes a buffer layer, and
the buffer layer includes the at least one second material.