Organic light-emitting device and display device including the same

Abstract

The present application relates to an organic light-emitting device and a display device including the organic light-emitting device. The organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer between the first electrode and the second electrode and including at least one light-emitting unit, wherein the at least one light-emitting unit includes: an emission layer; and a hole transport region between the first electrode and the emission layer and including a first hole transport (HT) layer, wherein the emission layer includes a host, the first HT layer includes a first compound, and the minimum bond dissociation energy (BDE) of the first compound is 1HT ) is greater than the triplet energy of the main body (T 1,主体 ), and the minimum bond dissociation energy (BDE) of the subject 主体 ) is greater than the triplet energy (T 1,主体 ).

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0030025, filed on March 15, 2019, in the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] One or more embodiments relate to an organic light-emitting device and a display apparatus including the organic light-emitting device. Background Art

[0004] Organic light emitting devices are self-emissive devices that produce full-color images, and also have wide viewing angles, high contrast, short response times, and excellent characteristics in terms of brightness, driving voltage, and response speed compared to other devices in the art.

[0005] In an example, an organic light-emitting device includes a first electrode on a substrate, and a hole transport region, an emission layer, an electron transport region, and a second electrode sequentially on the first electrode. Holes provided by the first electrode can move toward the emission layer through the hole transport region, and electrons provided by the second electrode can move toward the emission layer through the electron transport region. Carriers (e.g., holes and electrons) recombine in the emission layer to generate excitons.

[0006] According to electron spin statistics, singlet excitons and triplet excitons are formed at a ratio of 1:3. Due to intersystem crossing (ISC) or triplet-triplet fusion (TTF), conversion between singlet excitons and triplet excitons occurs. In the case of a device using a fluorescent light-emitting material, a singlet exciton transitions (e.g., transitions or relaxes) from an excited state to a ground state, thereby generating light. In the case of a device using a phosphorescent light-emitting material, a triplet exciton transitions (e.g., transitions or relaxes) from an excited state to a ground state, thereby generating light. Summary of the invention

[0007] One or more embodiments include an organic light-emitting device and a display apparatus including the organic light-emitting device.

[0008] Additional aspects of the embodiments will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the presented embodiments.

[0009] An aspect of an embodiment of the present disclosure provides an organic light-emitting device including:

[0010] a first electrode;

[0011] a second electrode facing the first electrode; and

[0012] an organic layer between the first electrode and the second electrode and including at least one light emitting unit,

[0013] The at least one light emitting unit comprises:

[0014] a transmitting layer; and

[0015] a hole transport region between the first electrode and the emissive layer and including a first hole transport (HT) layer,

[0016] The emitting layer comprises a body,

[0017] The first HT layer comprises a first compound,

[0018] The minimum bond dissociation energy (BDE) of the first compound 1HT ) is greater than the triplet energy (T 1,主体 ),as well as

[0019] The minimum bond dissociation energy (BDE) of the subject 主体 ) is greater than the triplet energy (T 1,主体 ).

[0020] Another aspect of an embodiment of the present disclosure provides a display device including: a thin film transistor including a source electrode, a drain electrode and an active layer; and the organic light-emitting device, wherein the first electrode of the organic light-emitting device is electrically connected to one of the source electrode and the drain electrode of the thin film transistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] These and / or other aspects of the embodiments will become apparent and more readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which:

[0022] Figure 1 is a schematic diagram of an organic light emitting device according to an embodiment;

[0023] Figure 2 is a schematic diagram of an organic light-emitting device according to another embodiment;

[0024] Figure 3 is a schematic diagram of an organic light-emitting device according to another embodiment;

[0025] Figure 4 is a schematic diagram of an organic light emitting device according to another embodiment; and

[0026] Figure 5 is a schematic diagram of an organic light emitting device according to another embodiment. DETAILED DESCRIPTION

[0027] With reference to the exemplary embodiments, the embodiments of the present disclosure will now be more fully described. However, the subject matter of the disclosure can be embodied in many different forms and should not be construed as being limited to the embodiments set forth herein; on the contrary, these embodiments are provided so that the disclosure will be thorough and complete, and the concepts of the disclosure will be fully conveyed to those skilled in the art. By reference to the embodiments described in more detail below in conjunction with the accompanying drawings, the features of the embodiments of the present disclosure and how to achieve them will become apparent. However, the subject matter of the present disclosure can be embodied in many different forms and should not be limited to the exemplary embodiments.

[0028] Hereinafter, the embodiments are described in more detail by referring to the accompanying drawings, and in the drawings, the same reference numerals denote the same elements and redundant explanations thereof will not be repeated herein.

[0029] 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.

[0030] It should also be understood that the terms “comprises” and / or “comprising” used herein specify the presence of stated features or components, but do not exclude the presence or addition of one or more other features or components.

[0031] It should be understood that when a layer, region or component is referred to as being "on" or "onto" another layer, region or component, it may be formed directly or indirectly on the other layer, region or component. For example, there may be intervening layers, regions or components.

[0032] For convenience of explanation, the sizes of elements in the drawings may be exaggerated. In other words, since the sizes and thicknesses of components in the drawings are arbitrarily shown for convenience of explanation, the following embodiments of the present disclosure are not limited thereto.

[0033] As used herein, the term "organic layer" refers to a single layer and / or multiple layers between the anode and cathode of an organic light-emitting device. The material contained in the "organic layer" is not limited to an organic material. For example, the organic layer may contain an inorganic material.

[0034] As used herein, the expression “(the organic layer) contains at least one first compound” may include the case where “(the organic layer) contains the same first compound represented by Formula 1” or the case where “(the organic layer) contains two or more different first compounds represented by Formula 1”.

[0035] An aspect of an embodiment of the present disclosure provides an organic light-emitting device including:

[0036] a first electrode;

[0037] a second electrode facing the first electrode; and

[0038] An organic layer between the first electrode and the second electrode and including at least one light-emitting unit, wherein the at least one light-emitting unit includes:

[0039] a transmitting layer; and

[0040] a hole transport region between the first electrode and the emissive layer and including a first hole transport (HT) layer,

[0041] The emission layer contains the body,

[0042] The first HT layer comprises a first compound,

[0043] The minimum bond dissociation energy (BDE) of the first compound 1HT ) is greater than the triplet energy of the main body (T 1,主体 ),as well as

[0044] The minimum bond dissociation energy (BDE) of the host 主体 ) is greater than the triplet energy of the main body (T 1,主体 ).

[0045] Hereinafter, embodiments of the present disclosure will be described with reference to the accompanying drawings.

[0046] Figures 1 to 5 Description

[0047] Figures 1 to 5 Each is a schematic diagram of an organic light-emitting device 10, 20, 30, 31 or 32 according to an embodiment of the disclosure. The organic light-emitting device 10, 20, 30, 31 or 32 each includes a first electrode 110, an organic layer 150, and a second electrode 190.

[0048] refer to Figure 1 , the organic light-emitting device 10 may include: a first electrode 110; a second electrode 190 facing the first electrode 110; and an organic layer 150 between the first electrode 110 and the second electrode 190. Figures 3 to 5 As shown in FIG. 1 , the organic layer 150 may include at least one light-emitting unit 153, 153-1, 153-2 and / or 153-3, wherein the light-emitting unit 153, 153-1, 153-2 and / or 153-3 includes: an emission layer. For example, an emission layer 150b, 153-2b and / or 153-3b may be included; and a hole transport region between the first electrode and the emission layer may be included. The hole transport region may include a first hole transport (HT) layer 150a, 153-2a and / or 153-3a.

[0049] The emission layer 150b, 153-2b and / or 153-3b may include a host, and the first HT layer 150a, 153-2a or 153-3a may include a first compound. The bond dissociation energy (BDE) of the first compound 1HT ) can be greater than the triplet energy of the host (T 1,主体 ), and the bond dissociation energy (BDE) of the bulk 主体 ) can be greater than the triplet energy of the host (T 1,主体 ).

[0050] As used herein, the term "bond dissociation energy" (BDE) refers to the energy required to break a bond in a molecule. The chemical bonds of the organic molecules used in the organic light-emitting device can receive energy from the excitons and be decomposed (e.g., dissociated). The decomposition rate of the organic molecules can depend on whether the molecules are in a cationic state, an anionic state, or a neutral state. The minimum bond dissociation energy (BDE) may refer to the minimum bond dissociation energy of the bond dissociation energy in the cationic state, the bond dissociation energy in the anionic state, and the bond dissociation energy in the neutral state.

[0051] When the first compound and the host satisfy the BDE as described herein above 1HT >T 1,主体 and BDE 主体 >T 1,主体 When the relationship is such that the first compound and the host are degraded by triplet excitons in the emission layer, the degradation can be prevented or reduced, and the service life of the organic light-emitting device can be increased.

[0052] Furthermore, when the first compound and the host satisfy the BDE as described herein above 1HT >T 1,主体 and BDE 主体 >T 1,主体 When the relationship between the first HT layer and the emission layer is such that the dissociation of the host material due to the excited excitons in the host does not occur (or substantially does not occur), the efficiency of the organic light-emitting device is improved. Because a narrow hole-electron recombination region is formed at the interface between the first HT layer and the emission layer, triplet-triplet fusion (TTF) is more likely to occur, thereby increasing the efficiency of the organic light-emitting device.

[0053] In one embodiment, the singlet state energy (S 1,主体 ) and the triplet energy of the host (T 1,主体 ) can satisfy the following equation T:

[0054] Equation T

[0055] S 1,主体 <2×T 1,主体 .

[0056] When the subject satisfies equation T, light of the TTF component may be emitted from the emission layer.

[0057] In one embodiment, the ratio of the TTF component emitted from the emission layer to the total light emission component can be 30% or greater. For example, in some embodiments, 30% of the total light emitted from the emission layer comes from the TTF component of the light.

[0058] In one embodiment, the lowest unoccupied molecular orbital (LUMO) energy (LUMO 1HT ) can be smaller than the LUMO energy of the subject (LUMO 主体 )’s absolute value.

[0059] For example, the LUMO energy (LUMO 1HT ) and the LUMO energy of the host (LUMO 主体 ) can satisfy the following equation A:

[0060] Equation A

[0061] |LUMO 1HT |<|LUMO 主体 |.

[0062] In one or more embodiments, the electron mobility (μ 主体 ) can be higher than the electron mobility (μ 1HT ).

[0063] For example, the electron mobility (μ 主体 ) and the electron mobility of the first compound (μ 1HT ) can satisfy the following equation B:

[0064] Equation B

[0065] μ 1HT <μ 主体 .

[0066] When the first compound and the host satisfy Equation A and / or Equation B described above, the leakage of electrons to the first HT layer can be reduced, thereby increasing the efficiency of the organic light-emitting device. Since a narrow hole-electron recombination region is formed at the interface between the first HT layer and the emission layer, TTF is more likely to occur, thereby increasing the efficiency of the organic light-emitting device.

[0067] In one embodiment, the first HT layer may be in direct contact (eg, physical contact) with the emissive layer.

[0068] In one embodiment, the thickness of the first HT layer (D 1HT ) and the thickness of the emission layer 150b (DE ) can satisfy D E ≥D 1HT For example, the thickness of the first HT layer (D 1HT ) and the thickness of the emission layer 150b (D E ) can satisfy D E >D 1HT , but the embodiments of the present disclosure are not limited thereto. When the thickness of the first HT layer (D 1HT ) and the thickness of the emission layer 150b (D E ) is within this range, a suitable or satisfactory efficiency improvement effect can be obtained without a significant increase in the driving voltage of the organic light-emitting device.

[0069] In one or more embodiments, the thickness of the first HT layer may be about to about When the thickness of the first HT layer is within this range, a suitable or satisfactory efficiency improvement effect may be obtained without a significant increase in the driving voltage of the organic light-emitting device.

[0070] refer to Figure 2 The organic light-emitting device 20 may include: a first electrode 110; a second electrode 190 facing the first electrode 110; and an organic layer between the first electrode 110 and the second electrode 190 and including at least one light-emitting unit, wherein the at least one light-emitting unit includes: an emission layer 150b; and a hole transport region between the first electrode and the emission layer and including a first hole transport (HT) layer 150a, the at least one light-emitting unit further includes an electron transport region between the second electrode and the emission layer and including a first electron transport (ET) layer 150c, and the first ET layer 150c contains a second compound.

[0071] In one embodiment, the HOMO energy (HOMO 主体 ) may have an absolute value smaller than the HOMO energy of the second compound (HOMO 1ET )’s absolute value.

[0072] For example, the HOMO energy of the subject (HOMO 主体 ) and the HOMO energy of the second compound (HOMO 1ET ) can satisfy the following equation C:

[0073] Equation C

[0074] |HOMO 主体 |<|HOMO 1ET |.

[0075] In one embodiment, the triplet energy (T1,1ET ) can be greater than the triplet energy of the host (T 1,主体 ).

[0076] For example, the triplet energy (T 1,1ET ) and the triplet energy of the host (T 1,主体 ) can satisfy equation D:

[0077] Equation D

[0078] T 1,1ET >T 1,主体 .

[0079] When the second compound and the host satisfy Equation C and / or Equation D described above, leakage of holes and / or excitons to the first ET layer is reduced, and a narrow hole-electron recombination region is formed at the interface between the first HT layer and the emission layer. Therefore, TTF is more likely to occur, thereby increasing the efficiency of the organic light-emitting device.

[0080] In one embodiment, the LUMO energy (LUMO 主体 ) and the LUMO energy of the second compound (LUMO 1ET ) can satisfy equation E:

[0081] Equation E

[0082] ||LUMO 1ET |-|LUMO 主体 ||≤0.3eV.

[0083] When the second compound and the host satisfy Equation E, electron injection into the emission layer increases and a narrow hole-electron recombination region is formed at the interface between the first HT layer and the emission layer. Therefore, TTF is more likely to occur, thereby increasing the efficiency of the organic light-emitting device.

[0084] In addition, when the second compound and the host satisfy equations C to E described above, the leakage of holes and excitons to the first ET layer is reduced, and the injection of electrons to the emission layer is increased. A narrow hole-electron recombination region is formed at the interface between the first HT layer and the emission layer. Therefore, TTF is more likely to occur, thereby increasing the efficiency of the organic light-emitting device.

[0085] In one embodiment, the first ET layer can be in direct contact (eg, physical contact) with the emissive layer.

[0086] In one embodiment, the host may include a compound represented by Formula 301.

[0087] In one embodiment, the host may include a compound represented by Formula 30:

[0088] Formula 30

[0089]

[0090] In formula 30,

[0091] L 31 and L 32 It can be substituted or unsubstituted C 6 -C 60 Arylene group,

[0092] m31 and m32 can be integers from 0 to 5.

[0093] Ar 31 ,Ar 32 and R 31 To R 38 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C 1 -C 60 Alkyl groups, substituted or unsubstituted C 2 -C 60 Alkenyl groups, substituted or unsubstituted C 2 -C 60 Alkynyl group, substituted or unsubstituted C 1 -C 60 Alkoxy groups, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-N(Q 1 )(Q 2 )、-P(=O)(Q 1 )(Q 2 ) and -S(=O) 2 (Q 1 )(Q 2 ),

[0094] Selected from Ar31 and Ar 32 At least one of which may be substituted or unsubstituted C 6 -C 60 Aryl groups,

[0095] The substituted C 6 -C 60 The arylene group, the substituted C 1 -C 60 The alkyl group, the substituted C 2 -C 60 The alkenyl group, the substituted C 2 -C 60 Alkynyl group, the substituted C 1 -C 60 Alkoxy groups, the substituted C 6 -C 60 The aryl group, the substituted C 6 -C 60 The aryloxy group, the substituted C 6 -C 60 Arylthio group, the substituted C 1 -C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused heteropolycyclic group may each be independently selected from:

[0096] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazine group, hydrazone group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl groups and C 1 -C 60 Alkoxy groups;

[0097] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl groups and C 1 -C 60 Alkoxy groups;

[0098] C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups;

[0099] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C1 -C 60 Alkoxy groups, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; and

[0100] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ),as well as

[0101] Q 1 To Q 3 , Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C 60 Alkoxy groups, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 1 -C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

[0102] In one embodiment, m31 and m32 can each independently be 0, 1 or 2. When m31 is 0, L 31 It can be a single bond, and when m32 is 0, L 32 Can be a single key.

[0103] In one embodiment, L 31 and L 32The phenylene group, the pentalenylene group, the indenylene group, the naphthylene group, the azulenylene group, the heptalenylene group, the indacenylene group, the acenaphthenylene group, the fluorenylene group, the spiro-bifluorenylene group, the spiro-fluorene-benzofluorenylene group, the benzofluorenylene group, the dibenzofluorenylene group, the phenanthrenylene group, the anthracenylene group, the fluoranthenylene group, the pyren ... The invention also includes a phenylene group, a tetraphenylene group, a perylenene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a rubidinyl group, a coronene group and an ovophene group.

[0104] In one or more than one embodiment, L 31 and L 32 Each may be independently a group represented by one selected from Formula 3-1 to Formula 3-26:

[0105]

[0106]

[0107] In Formula 3-1 to Formula 3-26,

[0108] Z 1 To Z 4 can be independently selected from hydrogen, 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 C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a pyrenyl group, a pyridyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolyl group, an isoquinolyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothienyl group, a triazine group, a benzimidazolyl group, a phenanthrolinyl group, and -Si(Q 33 )(Q 34 )(Q 35 ),

[0109] Q 33 To Q 35 Can be independently selected from C 1 -C 10 Alkyl group, C 1-C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group and a naphthyl group,

[0110] d3 can be an integer from 0 to 3,

[0111] d4 can be an integer from 0 to 4,

[0112] d5 can be an integer from 0 to 5,

[0113] d6 can be an integer from 0 to 6,

[0114] d8 can be an integer from 0 to 8, and

[0115] * and *' each represent a bonding site to an adjacent atom.

[0116] In one embodiment, Ar 31 ,Ar 32 and R 31 To R 38 Each may be independently a group represented by one selected from Formula 5-1 to Formula 5-12:

[0117]

[0118] In Formula 5-1 to Formula 5-12,

[0119] Z 31 and Z 32 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 2 -C 20 Alkenyl group, C 2 -C 20 Alkynyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a phenanthryl group, an anthracenyl group, a triphenylenyl group, a pyridyl group, a pyrimidinyl group, a carbazolyl group and a triazinyl group,

[0120] e2 can be 1 or 2,

[0121] e3 can be an integer from 1 to 3,

[0122] e4 can be an integer from 1 to 4,

[0123] e5 can be an integer from 1 to 5,

[0124] e6 can be an integer from 1 to 6,

[0125] e7 can be an integer from 1 to 7,

[0126] e9 can be an integer from 1 to 9, and

[0127] * indicates the connection site with the adjacent atom.

[0128] In one embodiment, selected from Ar 31 and Ar 32 At least one of may be a substituted or unsubstituted naphthyl group.

[0129] In one embodiment, the host may include a compound represented by Formula 31 or Formula 32:

[0130] Formula 31

[0131]

[0132] Formula 32

[0133]

[0134] In equations 31 and 32,

[0135] L 31 , L 32 、m 31 、m 32 ,Ar 31 and R 31 To R 38 It can be understood by referring to the corresponding description presented herein,

[0136] R 41 To R 47 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C 60 Alkoxy groups, C 6 -C 60 aryl groups, monovalent non-aromatic fused polycyclic groups, biphenyl groups and terphenyl groups, and

[0137] Selected from R 41 To R 47 At least two adjacent substituents in may be optionally linked to form a substituted or unsubstituted C 6 -C60 Carbocyclic group.

[0138] For example, the host may include at least one compound selected from Compound H1 to Compound H16, but embodiments of the present disclosure are not limited thereto:

[0139]

[0140] In one embodiment, the first compound may include a compound represented by Formula 40:

[0141] Formula 40

[0142]

[0143] In formula 40,

[0144] Y 1 Can be N or P,

[0145] X 1 To X 3 can be independently a single bond, O, S, N(R 2 )、C(R 2 )(R 3 ) or Si(R 2 )(R 3 ),

[0146] m1 can be 0, 1 or 2. When m1 is 0, A 1 and A 2 Not connected to each other,

[0147] A 1 To A 3 Can be independently C 5 -C 60 Carbocyclic group or C 1 -C 60 Heterocyclic groups,

[0148] n1 can be an integer from 2 to 4,

[0149] Ar 1 It may be a substituted or unsubstituted n1-valent C 5 -C 60 A carbocyclic group or a substituted or unsubstituted n1-valent C 1 -C 60 Heterocyclic groups,

[0150] R 2 and R 3 , R 10 , R 20 and R 30can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C 1 -C 60 Alkyl groups, substituted or unsubstituted C 2 -C 60 Alkenyl groups, substituted or unsubstituted C 2 -C 60 Alkynyl group, substituted or unsubstituted C 1 -C 60 Alkoxy groups, substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-N(Q 1 )(Q 2 )、-P(=O)(Q 1 )(Q 2 ) and -S(=O) 2 (Q 1 )(Q 2 ), selected from R 10 , R 20 and R 30 One of them can be combined with Ar 1 connect,

[0151] The substituted C 5 -C 60 The carbocyclic group, the substituted C 1 -C60 Heterocyclic group, the substituted C 1 -C 60 The alkyl group, the substituted C 2 -C 60 The alkenyl group, the substituted C 2 -C 60 Alkynyl group, the substituted C 1 -C 60 Alkoxy groups, the substituted C 3 -C 10 Cycloalkyl groups, the substituted C 1 -C 10 Heterocycloalkyl group, the substituted C 3 -C 10 Cycloalkenyl group, the substituted C 1 -C 10 Heterocycloalkenyl group, the substituted C 6 -C 60 The aryl group, the substituted C 6 -C 60 The aryloxy group, the substituted C 6 -C 60 Arylthio group, the substituted C 1 -C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic fused polycyclic group and the substituted monovalent non-aromatic fused heteropolycyclic group may be selected from:

[0152] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazine group, hydrazone group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl groups and C 1 -C 60 Alkoxy groups;

[0153] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl groups and C 1 -C 60 Alkoxy groups,

[0154] C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups;

[0155] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C60 Alkynyl group, C 1 -C 60 Alkoxy groups, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; and

[0156] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ),as well as

[0157] Q 1 To Q 3 , Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C 60 Alkoxy groups, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 1 -C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

[0158] In one embodiment, the first compound may include a compound represented by Formula 41:

[0159] Formula 41

[0160]

[0161] In formula 41,

[0162] X 11 To X 13 can be independently a single bond, O, S, N(R 4 )、C(R 4 )(R5 ) or Si(R 4 )(R 5 ),

[0163] X 21 To X 23 can be independently a single bond, O, S, N(R 6 )、C(R 6 )(R 7 ) or Si(R 6 )(R 7 ),

[0164] m11 and m21 can each independently be 0, 1 or 2,

[0165] Ar 1 Can be selected from substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C 10 Cycloalkenylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkenylene group, substituted or unsubstituted C 6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, and

[0166] R 4 To R 7 , R 11 To R 18 and R 21 To R 28 can be independently selected from substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 1 -C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-N(Q 1 )(Q 2 )、-P(=O)(Q1 )(Q 2 ) and -S(=O) 2 (Q 1 )(Q 2 ).

[0167] In one embodiment, Ar 1 The phenylene group may be selected from a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthenylene group, a fluorenylene group, a spiro-difluorenylene group, a spiro-fluorene-benzofluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a pyren ... The invention also includes a phenylene group, a tetraphenylene group, a perylenene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a rubidinyl group, a coronene group and an ovophene group.

[0168] In one embodiment, Ar 1 It may be a group represented by one selected from Formula 3-1 to Formula 3-26:

[0169]

[0170]

[0171] In Formula 3-1 to Formula 3-26,

[0172] Z 1 To Z 4 can be independently selected from hydrogen, 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 C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a pyrenyl group, a pyridyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a quinolyl group, an isoquinolyl group, a quinoxalinyl group, a quinazolinyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothienyl group, a triazine group, a benzimidazolyl group, a phenanthrolinyl group, and -Si(Q 33 )(Q 34 )(Q 35 ),

[0173] Q 33 To Q 35 Can be independently selected from C 1 -C 10 Alkyl group, C 1 -C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group and a naphthyl group,

[0174] d3 can be an integer from 0 to 3,

[0175] d4 can be an integer from 0 to 4,

[0176] d5 can be an integer from 0 to 5,

[0177] d6 can be an integer from 0 to 6,

[0178] d8 can be an integer from 0 to 8, and

[0179] * and *' each represent a bonding site to an adjacent atom.

[0180] In one embodiment, R 4 To R 7 , R 11 To R 18 and R 21 To R 28 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0181] For example, the first compound may include compound B1, but embodiments of the present disclosure are not limited thereto:

[0182]

[0183] In one embodiment, the second compound may include a compound represented by Formula 601, which will be further described herein below.

[0184] In one or more than one embodiments, the second compound may include a compound represented by Formula 50:

[0185] Formula 50

[0186]

[0187] In formula 50,

[0188] Y 51 To Y 53 can be N or C (R 50 ),

[0189] Selected from Y 51 To Y 53 At least one of may be N,

[0190] X 51 Can be O, S, N (R 59 )、C(R 59 )(R 60 ) or Si(R 59 )(R 60 ),

[0191] Ar 51 Can be expressed with selected from R 51 To R 58 One of the attachment sites in

[0192] Ar 52 ,Ar 53 and R 50 To R 60 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C 1 -C 60 Alkyl groups, substituted or unsubstituted C 2 -C 60 Alkenyl groups, substituted or unsubstituted C 2 -C 60 Alkynyl group, substituted or unsubstituted C 1 -C 60 Alkoxy groups, substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-N(Q 1 )(Q 2 )、-P(=O)(Q 1 )(Q 2 ) and -S(=O) 2 (Q 1 )(Q 2 ),

[0193] R 59 and R 60 Can be optionally linked to form a substituted or unsubstituted C 5 -C 60 A carbocyclic group or a substituted or unsubstituted C 1 -C 60 Heterocyclic groups,

[0194] The substituted C 5 -C 60 The carbocyclic group, the substituted C 1 -C 60 Heterocyclic group, the substituted C 1 -C 60 The alkyl group, the substituted C 2 -C 60 The alkenyl group, the substituted C 2 -C 60 Alkynyl group, the substituted C 1 -C 60 Alkoxy groups, the substituted C 3 -C 10 Cycloalkyl groups, the substituted C 1 -C 10 Heterocycloalkyl group, the substituted C 3 -C 10 Cycloalkenyl group, the substituted C 1 -C 10 Heterocycloalkenyl group, the substituted C 6 -C 60 The aryl group, the substituted C 6 -C 60 The aryloxy group, the substituted C 6 -C 60 Arylthio group, the substituted C 1-C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused heteropolycyclic group may be selected from:

[0195] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazine group, hydrazone group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl groups and C 1 -C 60 Alkoxy groups;

[0196] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O) 2 (Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl groups and C1 -C 60 Alkoxy groups,

[0197] C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups;

[0198] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C 60 Alkoxy groups, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q22 )、-C(=O)(Q 21 )、-S(=O) 2 (Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 6 -C 60 Aryloxy group, C 6 -C 60 Arylthio group, C 1 -C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; and

[0199] -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ),as well as

[0200] Q 1 To Q 3 , Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group, C 1 -C60 Alkoxy groups, C 3 -C 10 Cycloalkyl groups, C 1 -C 10 Heterocycloalkyl group, C 3 -C 10 Cycloalkenyl group, C 1 -C 10 Heterocycloalkenyl group, C 6 -C 60 Aryl group, C 1 -C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

[0201] In one embodiment, Ar in Formula 50 52 ,Ar 53 and R 50 To R 60 Each may be independently selected from a group represented by one selected from Formula 5-1 to Formula 5-26 and Formula 6-1 to Formula 6-55:

[0202]

[0203]

[0204]

[0205]

[0206] In Formulas 5-1 to 5-26 and 6-1 to 6-55,

[0207] Y 31 and Y 32 Can be O, S, C (Z 34 )(Z 35 )、N(Z 34 ) or Si(Z 34 )(Z 35 ),

[0208] Z 31 , Z 32 , Z 34 and Z 35 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 2 -C 20 Alkenyl group, C 2 -C20 Alkynyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a phenanthryl group, an anthracenyl group, a triphenylenyl group, a pyridyl group, a pyrimidinyl group, a carbazolyl group and a triazinyl group,

[0209] e2 can be 1 or 2,

[0210] e3 can be an integer from 1 to 3,

[0211] e4 can be an integer from 1 to 4,

[0212] e5 can be an integer from 1 to 5,

[0213] e6 can be an integer from 1 to 6,

[0214] e7 can be an integer from 1 to 7,

[0215] e9 can be an integer from 1 to 9, and

[0216] * indicates the connection site with the adjacent atom.

[0217] For example, the second compound includes a compound represented by Formula 51:

[0218] <Formula 51>

[0219]

[0220] Among them, in formula 51,

[0221] Y 51 To Y 53 Each independently the same as described above,

[0222] Ar 52 ,Ar 53 , R 50 To R 52 and R 54 To R 58 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group, and

[0223] R 59 and R 60 Connect to form C 5 -C60 Carbocyclic group.

[0224] For example, the second compound may include compound E1, but embodiments of the present disclosure are not limited thereto:

[0225]

[0226] In one embodiment, the emission layer may further include a dopant, and the amount of the host may be greater than the amount of the dopant.

[0227] In one embodiment, the dopant may include a fluorescent dopant, and the emissive layer may be configured to emit fluorescent light.

[0228] For example, the dopant may include a compound represented by Formula 501, which will be further described herein below.

[0229] refer to Figures 3 to 5 , the organic light-emitting devices 30, 31 and 32 may each include: m number of light-emitting units 153-1, 153-2 and 153-3; and m-1 number of charge generation layers 155-1 and 155-2 between two adjacent light-emitting units among the m number of light-emitting units, the charge generation layers 155-1 and 155-2 may each include n-type charge generation layers 155'-1 and 155'-2 including n-type charge generation materials, and p-type charge generation layers 155"-1 and 155"-2 including hole transport materials, and

[0230] m may be an integer of 2 or greater, and a maximum emission wavelength emitted by at least one of the m number of light emitting units may be different from a maximum emission wavelength emitted by at least one of the remaining light emitting units.

[0231] In one embodiment, the LUMO energy (LUMO nCGL ) and the HOMO energy (HOMO pCGL ) can be less than about 3.0 eV.

[0232] When the LUMO energy (LUMO nCGL ) and the HOMO energy (HOMO pCGL ) is less than 3.0 eV, electrons generated in the p-type charge generation layer easily move to the n-type charge generation layer. Therefore, the driving voltage of the organic light-emitting device can be reduced, and the efficiency of the organic light-emitting device can be increased.

[0233] In one embodiment, the LUMO energy (LUMO nCGL ) and the HOMO energy (HOMO pCGL ) can be less than about 2.8 eV.

[0234] In one embodiment, the n-type charge generation material may include a metal-free compound (eg, a compound that does not include a metal) that includes at least one π-electron-depleted nitrogen-containing ring.

[0235] As used herein, the term "π-electron-depleted nitrogen-containing ring" refers to a C-containing ring having at least one *-N=*' moiety as a ring-forming part. 1 -C 60 Heterocyclic group.

[0236] For example, the “π-electron-depleted nitrogen-containing ring” may be i) a 5- to 7-membered heteromonocyclic group having at least one *-N=*' moiety, ii) a heteropolycyclic group in which two or more 5- to 7-membered heteromonocyclic groups, each having at least one *-N=*' moiety, are fused to each other (e.g., bonded together), or iii) a heteropolycyclic group in which at least one of the 5- to 7-membered heteromonocyclic groups, each having at least one *-N=*' moiety, is fused to at least one C 5 -C 60 A carbocyclic group is fused to (eg, combined with) a heteropolycyclic group.

[0237] Examples of π-electron-depleted nitrogen-containing rings include imidazole, pyrazole, thiazole, isothiazole, oxazole, isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, indazole, purine, quinoline, isoquinoline, benzoquinoline, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, phenanthridine, acridine, phenanthroline, phenazine, benzimidazole, isobenzothiazole, benzoxazole, isobenzoxazole, triazole, tetrazole, oxadiazole, triazine, thiadiazole, imidazopyridine, imidazopyrimidine, and azacarbazole, but embodiments of the present disclosure are not limited thereto.

[0238] For example, the n-type charge generation material may include at least one selected from the compounds represented by Formula 601, but embodiments of the present disclosure are not limited thereto.

[0239] In one embodiment, the n-type charge generating material may include a compound represented by one selected from Formula 90 and Formula 91:

[0240] Formula 90

[0241]

[0242] Formula 91

[0243]

[0244] In equations 90 and 91,

[0245] X 91 To X 100 can be N or C (R 90 ),

[0246] Selected from X 91 To X 100 At least one of may be N,

[0247] L 91 and L 92 can be independently selected from substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C 10 Cycloalkenylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkenylene group, substituted or unsubstituted C 6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0248] a91 and a92 can each independently be an integer from 0 to 5,

[0249] R 90 and R 91 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C 1 -C 20 Alkyl groups, substituted or unsubstituted C 1 -C 20 Alkoxy groups, substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 91 )(Q 92 )(Q 93 )、-C(=O)(Q 91 )、-S(=O) 2 (Q 91 ) and -P(=O)(Q 91 )(Q 92 ),as well as

[0250] Q 91 To Q 93 Can be independently C 1 -C 10 Alkyl group, C 1 -C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group or a naphthyl group.

[0251] In one embodiment, X selected from Formula 90 91 To X 100 At least one of them may be C(R 90 ).

[0252] In one embodiment, in Formula 91, a91 may be 0 or 1, and a92 may be 1. When a91 is 0, -(L 91 ) a91 - can be a single bond.

[0253] In one embodiment, in Formula 91, L 91 and L 92 Each may independently be a phenylene group.

[0254] In one embodiment, in Formula 90 and Formula 91, R 90 and R 91 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 1 -C 20an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0255] For example, the n-type charge generating material may include at least one selected from compound nCGL1 and compound nCGL2, but embodiments of the present disclosure are not limited thereto:

[0256]

[0257] In one embodiment, the n-type charge generation layer may further include a metal-containing material.

[0258] In one embodiment, the metal-containing material may have a work function of about 2.0 eV to about 4.5 eV, and

[0259] The metal-containing material may be a metal, a metal oxide, a metal halide or any combination thereof.

[0260] In one embodiment, the metal-containing material may be at least one selected from the group consisting of Yb, Ag, Al, Sm, Mg, Li, and RbI.

[0261] In one embodiment, the hole transport material included in the p-type charge generation layer can be selected from a compound not containing a cyano group (e.g., a compound not containing a cyano group), an amine-based compound, and a carbazole-based compound, and a copper halide (copper halide: CuX, wherein X is F, Cl or Br), which has an absolute value of a HOMO energy level greater than about 5.5 eV and less than or equal to 8.0 eV.

[0262] In one embodiment, the hole transport material included in the p-type charge generation layer may be selected from the group represented by Formula 201, Formula 202, and Formula 301-2, which will be further described herein below.

[0263] For example, the hole transport material contained in the p-type charge generating layer may be compound HT1:

[0264]

[0265] In one embodiment, the p-type charge generation layer may further include a p-dopant which will be described below.

[0266] For example, the p-type charge generation layer may further comprise the compound HAT-CN:

[0267] HAT-CN

[0268]

[0269] In one embodiment, the p-type charge generation layer may have a multi-layer structure in which a first layer including a p-dopant and a second layer including a hole transport material are stacked.

[0270] In one embodiment, m can be 2,

[0271] The m number of light emitting units may include a first light emitting unit and a second light emitting unit.

[0272] The first light emitting unit and the second light emitting unit can each be independently understood by referring to the description presented on the light emitting unit.

[0273] The m-1 number of charge generation layers may each include a first charge generation layer,

[0274] The first charge generation layer may be between the first light emitting unit and the second light emitting unit.

[0275] The first light emitting unit may be between the first electrode and the first charge generating layer,

[0276] The second light emitting unit may be between the first charge generating layer and the second charge generating layer.

[0277] The first charge generation layer may include a first n-type charge generation layer and a first p-type charge generation layer, the first n-type charge generation layer may be between the first light emitting unit and the second light emitting unit, and the first p-type charge generation layer may be between the first n-type charge generation layer and the second light emitting unit,

[0278] The first light emitting unit may be configured to emit a first color light, and the second light emitting unit may be configured to emit a second color light,

[0279] The maximum emission wavelength of the first color light and the maximum emission wavelength of the second color light may be the same as or different from each other, and

[0280] The first color light and the second color light may be emitted in the form of mixed light.

[0281] In one or more than one embodiment, m can be 3,

[0282] The m number of light emitting units may include a first light emitting unit, a second light emitting unit and a third light emitting unit.

[0283] The first light emitting unit, the second light emitting unit and the third light emitting unit can each be independently understood by referring to the description presented about the light emitting unit,

[0284] The m-1 number of charge generation layers may include a first charge generation layer and a second charge generation layer,

[0285] The first charge generation layer may be between the first light emitting unit and the second light emitting unit.

[0286] The second charge generation layer may be between the second light emitting unit and the third light emitting unit.

[0287] The first light emitting unit may be between the first electrode and the first charge generating layer,

[0288] The second light emitting unit may be between the first charge generating layer and the second charge generating layer.

[0289] The third light emitting unit may be between the second charge generating layer and the second electrode.

[0290] The first charge generation layer may include a first n-type charge generation layer and a first p-type charge generation layer, the first n-type charge generation layer may be between the first light emitting unit and the second light emitting unit, and the first p-type charge generation layer may be between the first n-type charge generation layer and the second light emitting unit,

[0291] The second charge generation layer may include a second n-type charge generation layer and a second p-type charge generation layer, the second n-type charge generation layer may be between the second light emitting unit and the third light emitting unit, and the second p-type charge generation layer may be between the second n-type charge generation layer and the third light emitting unit,

[0292] The first light emitting unit may be configured to emit a first color light, the second light emitting unit may be configured to emit a second color light, and the third light emitting unit may be configured to emit a third color light,

[0293] The maximum emission wavelength of the first color light, the maximum emission wavelength of the second color light, and the maximum emission wavelength of the third color light may be the same as or different from each other, and

[0294] The first color light, the second color light, and the third color light may be emitted in the form of mixed light.

[0295] Another aspect of an embodiment of the present disclosure provides a display device including: a thin film transistor including a source electrode, a drain electrode, and an active layer; and the organic light-emitting device, wherein a first electrode of the organic light-emitting device is electrically connected to one of the source electrode and the drain electrode of the thin film transistor.

[0296] In the following, reference will be made to Figures 1 to 5 Various components of an organic light-emitting device according to one or more embodiments are described in more detail.

[0297] refer to Figures 1 to 5, the substrate may be additionally below the first electrode 110 or above the second electrode 190. The substrate may be a glass substrate or a plastic substrate each having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water resistance.

[0298] The first electrode 110 may be formed by depositing or sputtering a material for forming the first electrode 110 on a substrate. When the first electrode 110 is an anode, the material for forming the first electrode 110 may be selected from materials having a high work function to facilitate hole injection.

[0299] The first electrode 110 may be a reflective electrode, a semi-transmissive electrode or a transmissive electrode. When the first electrode 110 is a transmissive electrode, a material for forming the first electrode may be selected from indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO 2 ), zinc oxide (ZnO), and any combination thereof, but the embodiments of the present disclosure are not limited thereto. In one or more than one embodiments, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, the material used to form the first electrode may be selected from magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), and any combination thereof, but the embodiments of the present disclosure are not limited thereto.

[0300] 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-layer structure of ITO / Ag / ITO, but the structure of the first electrode 110 is not limited thereto.

[0301] Organic layer

[0302] The organic layer 150 may be on the first electrode 110 , and may include an emission layer 150 b .

[0303] The organic layer may include a hole transport region between the first electrode 110 and the emission layer 150 b and an electron transport region between the emission layer 150 b and the second electrode 190 .

[0304] Hole transport region in the organic layer

[0305] The hole transport region may include the first HT layer 150a, 153-2a, or 153-3a. The first compound included in the first HT layer 150a, 153-2a, or 153-3a will be further described herein below.

[0306] The hole transport region may have i) a single-layer structure including a single layer containing a single material, ii) a single-layer structure including a single layer containing a plurality of different materials, or iii) a multi-layer structure having a plurality of layers containing a plurality of different materials.

[0307] The hole transport region may further include at least one layer selected from the group consisting of an electron blocking layer, a hole injection layer, a hole transport layer, and an emission auxiliary layer.

[0308] For example, in addition to the first HT layer 150a, 153-2a, or 153-3a, the hole transport region may further include a single-layer structure including a single layer including a plurality of different materials, or may have a multilayer structure of hole injection layer / hole transport layer, hole injection layer / hole transport layer / emission auxiliary layer, hole injection layer / emission auxiliary layer, hole injection layer / hole transport layer / electron blocking layer, hole injection layer / hole transport layer / emission auxiliary layer / electron blocking layer, hole injection layer / emission auxiliary layer / electron blocking layer, or hole transport layer / emission auxiliary layer / electron blocking layer, wherein layers of the respective structures are sequentially stacked on the first electrode 110. However, embodiments of the present disclosure are not limited thereto.

[0309] The hole transport region may include at least one compound selected from m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4',4"-tri(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), a compound represented by Formula 201, and a compound represented by Formula 202:

[0310]

[0311] Formula 201

[0312]

[0313] Formula 202

[0314]

[0315] In equation 201 and equation 202,

[0316] L 201 To L 204 can be independently selected from substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C10 Cycloalkenylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkenylene group, substituted or unsubstituted C 6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0317] L 205 Can be selected from *-O-*', *-S-*', *-N(Q 201 )-*', substituted or unsubstituted C 1 -C 20 Alkylene group, substituted or unsubstituted C 2 -C 20 Alkenylene group, substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C 10 Cycloalkenylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkenylene group, substituted or unsubstituted C 6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0318] xa1 to xa4 can each independently be an integer from 0 to 3,

[0319] xa5 can be an integer from 1 to 10, and

[0320] R 201 To R 204 and Q 201 can be independently selected from substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 a heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

[0321] For example, in Equation 202, R 201 and R 202 can be optionally linked via a single bond, a dimethyl-methylene group or a diphenyl-methylene group, and R 203 and R 204 The attachment may optionally be via a single bond, a dimethyl-methylene group or a diphenyl-methylene group.

[0322] In one embodiment, in Formula 201 and Formula 202,

[0323] L 201 To L 205 Can be independently selected from:

[0324] a phenylene group, a pentalenylene group, an indenylene group, a naphthylene group, an azulenylene group, a heptalenylene group, an indacenylene group, an acenaphthenylene group, a fluorenylene group, a spiro-difluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrenylene group, an anthracenylene group, a fluoranthenylene group, a phenylene group, a phenanthrenylene group, a py ... a phenylene group, a tetraphenylene group, a perylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a rubinylene group, a coronene group, an ovphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothienylene group, a dibenzofuranylene group, a dibenzothienylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, and a pyridylene group; and

[0325] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C 1 -C 10 a phenyl group substituted with an alkyl group, a phenyl group substituted with -F, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenaltenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a tetraphenyl group, a pyrenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a rubinyl group, a coronet group, an ovaphenyl group, a thienyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothienyl group, a dibenzofuranyl group, a dibenzothienyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, a pyridyl group, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ) is at least one substituted phenylene group, pentalenylene group, indenylene group, naphthylene group, azulenylene group, heptalenylene group, indacenylene group, acenaphthenylene group, fluorenylene group, spiro-difluorenylene group, benzofluorenylene group, dibenzofluorenylene group, phenalenylene group, phenanthrenylene group, anthracenylene group, fluoranthenylene group, phenanthrenylene group, py ... a phenylene group, a tetraphenylene group, a perylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a rubinylene group, a coronene group, an ovphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothienylene group, a dibenzofuranylene group, a dibenzothienylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, and a pyridylene group, and

[0326] Q 31 To Q 33 Can be independently selected from C 1 -C 10 Alkyl group, C 1 -C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0327] In one or more than one embodiments, xa1 to xa4 can each independently be 0, 1 or 2.

[0328] In one or more than one embodiments, xa5 can be 1, 2, 3 or 4.

[0329] In one or more than one embodiment, R 201 To R 204 and Q 201 Can be independently selected from:

[0330] a phenyl group, a biphenyl group, a terphenyl group, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenaltenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, and a pyridyl group; and

[0331] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C 1 -C 10 a phenyl group substituted with an alkyl group, a phenyl group substituted with -F, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenaltenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a tetraphenyl group, a pyrenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a rubinyl group, a coronet group, an ovaphenyl group, a thienyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothienyl group, a dibenzofuranyl group, a dibenzothienyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, a pyridyl group, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ) is at least one substituted phenyl group, biphenyl group, terphenyl group, pentalenyl group, indenyl group, naphthyl group, azulenyl group, heptalenyl group, indacenyl group, acenaphthenyl group, fluorenyl group, spiro-bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenaltenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, and a pyridyl group,

[0332] Q 31 To Q 33 Same as described above in this article.

[0333] In one or more than one embodiment, R selected from Formula 201 201 To R 203 At least one of can be independently selected from:

[0334] fluorenyl groups, spiro-bifluorenyl groups, carbazolyl groups, dibenzofuranyl groups, and dibenzothiophenyl groups; and

[0335] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C 1 -C 10a phenyl group substituted with an alkyl group, a phenyl group substituted with -F, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group substituted with at least one of a fluorenyl group, a spiro-bifluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group,

[0336] However, embodiments of the present disclosure are not limited thereto.

[0337] In one or more than one embodiment, in Formula 202, i) R 201 and R 202 can be connected via a single bond, and / or ii) R 203 and R 204 Can connect via one-touch.

[0338] In one or more than one embodiment, R selected from Formula 202 201 To R 204 At least one of may be selected from:

[0339] a carbazolyl group; and

[0340] is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C 1 -C 10 a carbazolyl group substituted with at least one of a phenyl group substituted with an alkyl group, a phenyl group substituted with -F, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a carbazolyl group, a dibenzofuranyl group and a dibenzothienyl group,

[0341] However, embodiments of the present disclosure are not limited thereto.

[0342] The compound represented by Formula 201 can be represented by Formula 201A:

[0343] Formula 201A

[0344]

[0345] In one embodiment, the compound represented by Formula 201 may be represented by the following Formula 201A(1), but embodiments of the present disclosure are not limited thereto:

[0346] Formula 201A(1)

[0347]

[0348] In one embodiment, the compound represented by Formula 201 may be represented by the following Formula 201A-1, but embodiments of the present disclosure are not limited thereto:

[0349] Formula 201A-1

[0350]

[0351] In one embodiment, the compound represented by Formula 202 may be represented by Formula 202A:

[0352] Formula 202A

[0353]

[0354] In one embodiment, the compound represented by Formula 202 can be represented by Formula 202A-1:

[0355] Formula 202A-1

[0356]

[0357] In Formula 201A, Formula 201A(1), Formula 201A-1, Formula 202A, and Formula 202A-1,

[0358] L 201 To L 203 , xa1 to xa3, xa5 and R 202 To R 204 It can be understood by referring to the corresponding description presented herein,

[0359] R 211 and R 212 can be independently compared with R 203 The same definitions, and

[0360] R 213 To R 217 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C 1 -C 10a phenyl group substituted with an alkyl group, a phenyl group substituted with -F, a pentalenyl group, an indenyl group, a naphthyl group, an azulenyl group, a heptalenyl group, an indacenyl group, an acenaphthenyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenaltenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, The invention also includes but is not limited to: a benzothiophenyl group, a tetraphenyl group, a peryl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a rubinyl group, a coronet group, an ovaphenyl group, a thienyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, and a pyridyl group.

[0361] The hole transport region may include at least one compound selected from Compound HT1 to Compound HT39, but embodiments of the present disclosure are not limited thereto:

[0362]

[0363]

[0364]

[0365]

[0366] The thickness of the hole transport region may be about to about For example, about to about When the hole transport region includes at least one selected from a hole injection layer and a hole transport layer, the thickness of the hole injection layer may be about to about And for example, about to about and the thickness of the hole transport layer may be about to about And for example, about to about When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within these ranges, suitable or satisfactory hole transport characteristics may be obtained without a significant increase in driving voltage.

[0367] The emission assisting layer may increase light emission efficiency by compensating the optical resonance distance according to the wavelength of light emitted by the emission layer 150b, and the electron blocking layer may block the flow of electrons from the electron transport region. The emission assisting layer and the electron blocking layer may include materials as described herein above.

[0368] p-dopant

[0369] In addition to these materials, the hole transport region may further include a charge generation material for improving conductive (eg, electrical conduction) properties. The charge generation material may be dispersed uniformly or non-uniformly in the hole transport region.

[0370] The charge generating material may be, for example, a p-dopant.

[0371] In one embodiment, the p-dopant may have a lowest unoccupied molecular orbital (LUMO) energy level of -3.5 eV or less.

[0372] The p-dopant may include at least one selected from the group consisting of a quinone derivative, a metal oxide, and a cyano group-containing compound, but embodiments of the present disclosure are not limited thereto.

[0373] In one embodiment, the p-dopant may include at least one selected from the group consisting of:

[0374] Quinone derivatives, such as tetracyanoquinodimethane (TCNQ) and 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ);

[0375] Metal oxides, such as tungsten oxide or molybdenum oxide;

[0376] 1,4,5,8,9,12-Hexaazatriphenylene-hexacarbonitrile (HAT-CN); and

[0377] The compound represented by formula 221,

[0378] However, the embodiments of the present disclosure are not limited thereto:

[0379]

[0380] Formula 221

[0381]

[0382] In formula 221,

[0383] R 221 To R 223 can be independently selected from substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C10 Heterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 1 -C 60 Heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups and substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups, wherein R is selected from 221 To R 223 At least one of the may have a cyano group, -F, -Cl, -Br, -I, C substituted by -F 1 -C 20 Alkyl groups, C substituted by -Cl 1 -C 20 Alkyl groups, C substituted with -Br 1 -C 20 Alkyl groups and C substituted by -I 1 -C 20 At least one substituent in the alkyl group.

[0384] Emission Layer

[0385] When the organic light-emitting device 10 is a full-color organic light-emitting device, the emission layer 150b, 153-2b or 153-3b may be patterned into a red emission layer, a green emission layer or a blue emission layer according to the sub-pixel. In one or more embodiments, the emission layer 150b, 153-2b or 153-3b may have a stacked structure of two or more layers selected from a red emission layer, a green emission layer and a blue emission layer, wherein the two or more layers are in contact with each other or separated from each other. In one or more embodiments, the emission layer may include two or more materials selected from a red light-emitting material, a green light-emitting material and a blue light-emitting material, wherein the two or more materials are mixed with each other in a single layer to emit white light.

[0386] The emission layer 150b, 153-2b or 153-3b may include a host and a dopant. The dopant may be a phosphorescent dopant.

[0387] In the emission layer 150 b , 153 - 2 b , or 153 - 3 b , the amount of the dopant may be about 0.01 parts by weight to about 15 parts by weight based on 100 parts by weight of the host, but embodiments of the present disclosure are not limited thereto.

[0388] The thickness of the emission layer 150b may be about to about For example, about to about When the thickness of the emission layer 150b is within this range, excellent light emission characteristics may be obtained without a significant increase in driving voltage.

[0389] Subject in the emission layer

[0390] The subject may include a compound described herein above.

[0391] In one or more than one embodiment, the host may further include a compound represented by Formula 301:

[0392] Formula 301

[0393] [Ar 301 ] xb11 -[(L 301 ) xb1 -R 301 ] xb21 .

[0394] In formula 301,

[0395] Ar 301 It can be substituted or unsubstituted C 5 -C 60 A carbocyclic group or a substituted or unsubstituted C 1 -C 60 Heterocyclic groups,

[0396] xb11 can be 0, 1, 2, or 3.

[0397] L 301 Can be selected from substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C 10 Cycloalkenylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkenylene group, substituted or unsubstituted C 6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0398] xb1 can be an integer from 0 to 5.

[0399] R 301It can be selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C 1 -C 60 Alkyl groups, substituted or unsubstituted C 2 -C 60 Alkenyl groups, substituted or unsubstituted C 2 -C 60 Alkynyl group, substituted or unsubstituted C 1 -C 60 Alkoxy groups, substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 301 )(Q 302 )(Q 303 )、-N(Q 301 )(Q 302 )、-B(Q 301 )(Q 302 )、-C(=O)(Q 301 )、-S(=O) 2 (Q 301 ) and -P(=O)(Q 301 )(Q 302 ),

[0400] xb21 can be an integer from 1 to 5, and

[0401] Q 301 To Q 303 Can be independently selected from C 1 -C 10 Alkyl group, C 1 -C 10An alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group, but the embodiments of the present disclosure are not limited thereto.

[0402] In one embodiment, Ar in Formula 301 301 Can be selected from:

[0403] naphthyl group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, triphenylene group, pyrene group, group, a naphthacene group, a phenanthrene group, a perylene group, a pentaphenyl group, an indenoanthracene group, a dibenzofuran group, and a dibenzothiophene group; and

[0404] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ) is at least one substituted naphthyl group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, triphenylene group, pyrene group, groups, naphthacene groups, phenanthracene groups, perylene groups, pentaphenyl groups, indenoanthracene groups, dibenzofuran groups and dibenzothiophene groups, and

[0405] Q 31 To Q 33 Can be independently selected from C 1 -C 10 Alkyl group, C 1 -C 10 An alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group, but the embodiments of the present disclosure are not limited thereto.

[0406] When xb11 in formula 301 is two or more, two or more Ar 301Can connect via one-touch.

[0407] In one or more than one embodiments, the compound represented by Formula 301 can be represented by Formula 301-1 or Formula 301-2:

[0408] Formula 301-1

[0409]

[0410] Formula 301-2

[0411]

[0412] In Formula 301-1 and Formula 301-2,

[0413] Ring A 301 To Ring A 304 can be independently selected from a benzene ring, a naphthalene ring, a phenanthrene ring, a fluoranthene ring, a triphenylene ring, a pyrene ring, ring, a pyridine ring, a pyrimidine ring, an indene ring, a fluorene ring, a spiro-bifluorene ring, a benzofluorene ring, a dibenzofluorene ring, an indole ring, a carbazole ring, a benzocarbazole ring, a dibenzocarbazole ring, a furan ring, a benzofuran ring, a dibenzofuran ring, a naphthofuran ring, a benzonaphthofuran ring, a dinaphthofuran ring, a thiophene ring, a benzothiophene ring, a dibenzothiophene ring, a naphthothiophene ring, a benzonaphthothiophene ring and a dinaphthothiophene ring,

[0414] X 301 Can be O, S or N-[(L 304 ) xb4 -R 304 ],

[0415] R 311 To R 314 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q32 ),

[0416] xb22 and xb23 can each independently be 0, 1 or 2,

[0417] L 301 、xb1、R 301 and Q 31 To Q 33 It can be understood by referring to the corresponding description presented herein,

[0418] L 302 To L 304 can be independently related to L 301 The same definition,

[0419] xb2 to xb4 may each independently be the same as defined with respect to xb1, and

[0420] R 302 To R 304 can be independently compared with R 301 The definition is the same.

[0421] For example, L in Formula 301, Formula 301-1, and Formula 301-2 301 To L 304 Can be independently selected from:

[0422] a phenylene group, a naphthylene group, a fluorenylene group, a spiro-difluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthrylene group, a fluoranthenylene group, a phenylene group, a pyrenyl ... a phenylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothiophenylene group, a dibenzofuranyl group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, a pyridinylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a thiadiazolylene group, an oxadiazolylene group , pyrazinylene groups, pyrimidinylene groups, pyridazinylene groups, triazinylene groups, quinolinylene groups, isoquinolinylene groups, benzoquinolinylene groups, phthalazinylene groups, naphthyridinylene groups, quinoxalinylene groups, quinazolinylene groups, cinnolinylene groups, phenanthridinylene groups, acridinylene groups, phenanthrolinylene groups, phenazinylene groups, benzimidazolylene groups, isobenzothiazolylene groups, benzoxazolylene groups, isobenzoxazolylene groups, triazolylene groups, tetrazolylene groups, imidazopyridinylene groups, imidazopyrimidinylene groups, and azacarbazolylene groups; and

[0423] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolyl group, isoquinolyl group, benzoquinolyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinnolinyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, azacarbazolyl group, -Si(Q31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ) is at least one substituted phenylene group, naphthylene group, fluorenylene group, spiro-bifluorenylene group, benzofluorenylene group, dibenzofluorenylene group, phenanthrenyl group, anthracenylene group, fluoranthenylene group, phenylphenanthrenyl group, pyrenylene ... a phenylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothiophenylene group, a dibenzofuranyl group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, a pyridinylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a thiadiazolylene group, an oxadiazolylene group , a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a triazinylene group, a quinolylene group, an isoquinolylene group, a benzoquinolylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzimidazolylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an imidazopyridylene group, an imidazopyrimidinylene group, and an azacarbazolylene group, and

[0424] Q 31 To Q 33 Same as described above in this article.

[0425] In one embodiment, in Formula 301, Formula 301-1 and Formula 301-2, R 301 To R 304 Can be independently selected from:

[0426] a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group , pyrazinyl groups, pyrimidinyl groups, pyridazinyl groups, triazinyl groups, quinolyl groups, isoquinolyl groups, benzoquinolyl groups, phthalazinyl groups, naphthyridinyl groups, quinoxalinyl groups, quinazolinyl groups, cinnolinyl groups, phenanthridinyl groups, acridinyl groups, phenanthrolinyl groups, phenazinyl groups, benzimidazolyl groups, isobenzothiazolyl groups, benzoxazolyl groups, isobenzoxazolyl groups, triazolyl groups, tetrazolyl groups, imidazopyridinyl groups, imidazopyrimidinyl groups, and azacarbazolyl groups; and

[0427] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolyl group, isoquinolyl group, benzoquinolyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, cinnolinyl group, phenanthridinyl group, acridinyl group, phenanthrolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, azacarbazolyl group, -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ) is at least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenanthryl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group , a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolyl group, an isoquinolyl group, a benzoquinolyl 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, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and an azacarbazolyl group, and

[0428] Q 31 To Q 33 Same as described above in this article.

[0429] In one embodiment, the host may further include an alkaline earth metal complex. For example, the host may further include at least one compound selected from a Be complex (eg, compound H55), a Mg complex, and a Zn complex.

[0430] The host may include at least one selected from 9,10-di(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthalene-2-yl)anthracene (MADN), 9,10-di-(2-naphthyl)-2-tert-butyl-anthracene (TBADN), 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP), 1,3-di-9-carbazolylbenzene (mCP), 1,3,5-tri(carbazolyl-9-yl)benzene (TCP), and compounds H1 to H55, but embodiments of the present disclosure are not limited thereto:

[0431]

[0432]

[0433]

[0434] In one embodiment, the host may include at least one selected from a silicon-containing compound (eg, BCPDS, etc.) and a phosphine oxide-containing compound (eg, POPCPA, etc.).

[0435] The body may include only one type (or kind) of compound or two or more different types (or kinds) of compounds.As such, the embodiments may be modified in various suitable ways.

[0436] Fluorescent dopant in the emission layer 150b

[0437] The emissive layer may include a dopant, and the dopant may be configured to emit fluorescence by TTF. In one embodiment, the dopant may be configured to emit thermally activated delayed fluorescence (TADF) or fluorescence.

[0438] The dopant may further include an arylamine compound or a styrylamine compound.

[0439] The dopant may include a compound represented by Formula 501:

[0440] Formula 501

[0441]

[0442] In formula 501,

[0443] Ar 501 It can be substituted or unsubstituted C 5 -C 60 A carbocyclic group or a substituted or unsubstituted C 1 -C 60 Heterocyclic groups,

[0444] L 501 To L 503 can be independently selected from substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C 10 Cycloalkenylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkenylene group, substituted or unsubstituted C6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0445] xd1 to xd3 may each independently be an integer from 0 to 3,

[0446] R 501 and R 502 can be independently selected from substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups and substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups, and

[0447] xd4 can be an integer from 1 to 6.

[0448] In one embodiment, Ar in Formula 501 501 Can be selected from:

[0449] naphthyl group, heptalene group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, triphenylene group, pyrene group, group, a naphthacene group, a phenanthrene group, a perylene group, a pentaphenyl group, an indenoanthracene group, and an indenophenanthrene group; and

[0450] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20a naphthyl group substituted with at least one of an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group and a naphthyl group, a heptalene group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a triphenylene group, a pyrene group, group, a naphthacene group, a phenanthrene group, a perylene group, a pentaphenyl group, an indenoanthracene group and an indenophenanthrene group.

[0451] In one or more than one embodiment, L in Formula 501 501 To L 503 Can be independently selected from:

[0452] a phenylene group, a naphthylene group, a fluorenylene group, a spiro-difluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthrylene group, a fluoranthenylene group, a phenylene group, a pyrenyl ... a phenylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothienylene group, a dibenzofuranylene group, a dibenzothienylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, and a pyridylene group; and

[0453] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, The invention also includes at least one substituted phenylene group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, anthracen ... The invention also includes but is not limited to: a phenylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothienylene group, a dibenzofuranylene group, a dibenzothienylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, and a pyridylene group.

[0454] In one or more than one embodiment, R in Formula 501 501 and R 502 Can be independently selected from:

[0455] a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, and a pyridyl group; and

[0456] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furanyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothienyl group, a dibenzofuranyl group, a dibenzothienyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, a pyridyl group, and -Si(Q) 31 )(Q 32 )(Q 33 ) is at least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenanthryl group, anthracenyl group, fluoranthenyl group, triphenylenyl group, pyrenyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilyl group, and a pyridyl group, and

[0457] Q 31 To Q 33 Can be independently selected from C 1 -C 10 Alkyl group, C 1 -C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0458] In one or more than one embodiments, xd4 in Formula 501 may be 2, but embodiments of the present disclosure are not limited thereto.

[0459] For example, the fluorescent dopant may be selected from Compound FD1 to Compound FD22:

[0460]

[0461]

[0462]

[0463] In one embodiment, the fluorescent dopant may be selected from the following compounds, but embodiments of the present disclosure are not limited thereto:

[0464]

[0465] Electron transport region in the organic layer

[0466] The electron transport region may include a first ET layer 150c, 153-2c, or 153-3c. The second compound included in the first ET layer 150c, 153-2c, or 153-3c may be understood by referring to the corresponding description presented herein.

[0467] The electron transport region may have i) a single-layer structure including a single layer including a single material, ii) a single-layer structure including a single layer including a plurality of different materials, or iii) a multi-layer structure including a plurality of layers including a plurality of different materials.

[0468] The electron transport region may further include at least one layer selected from a buffer layer, an electron control layer, an electron transport layer, and an electron injection layer in addition to the first ET layer 150c, 153-2c, or 153-3c, but embodiments of the present disclosure are not limited thereto.

[0469] For example, in addition to the first ET layer 150c, 153-2c or 153-3c, the electron transport region may include an electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, a buffer layer / electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, a hole blocking layer / electron control layer / electron transport layer / electron injection layer structure, or a hole blocking layer / buffer layer / electron transport layer / electron injection layer structure, wherein for each structure, the constituent layers are stacked sequentially from the emission layer, but the embodiments of the present disclosure are not limited thereto.

[0470] In one embodiment, the thickness (D 1ET ) and the thickness (D E ) can satisfy D E ≥D 1ET In more detail, the thickness (D 1ET ) and the thickness (D E ) can satisfy D E >D 1ET , but the embodiments of the present disclosure are not limited thereto. When the thickness satisfies the above range, the organic light emitting device may have a desired efficiency improvement effect without increasing a driving voltage.

[0471] In one or more embodiments, the thickness of the first ET layer 150c, 153-2c or 153-3c may be to However, the embodiments of the present disclosure are not limited thereto. When the thickness satisfies the above range, the organic light emitting device may have a desired efficiency improvement effect without increasing a driving voltage.

[0472] The electron transport region (eg, a buffer layer, a hole blocking layer, an electron control layer, or an electron transport layer in the electron transport region) may include a metal-free compound containing at least one π-electron-depleted nitrogen-containing ring.

[0473] As noted above, as used herein, the term "π-electron-depleted nitrogen-containing ring" refers to a C-containing ring having at least one *-N=*' moiety as a ring-forming portion. 1 -C 60 Heterocyclic group.

[0474] For example, as noted herein above, the "π-electron-depleted nitrogen-containing ring" can be i) a 5- to 7-membered heteromonocyclic group having at least one *-N=*' moiety, ii) a heteropolycyclic group in which two or more 5- to 7-membered heteromonocyclic groups, each having at least one *-N=*' moiety, are fused to each other (e.g., bonded together), or iii) a heteropolycyclic group in which at least one of the 5- to 7-membered heteromonocyclic groups, each having at least one *-N=*' moiety, is fused to at least one C 5 -C 60 A carbocyclic group is fused to (eg, combined with) a heteropolycyclic group.

[0475] Examples of π-electron-depleted nitrogen-containing rings include imidazole, pyrazole, thiazole, isothiazole, oxazole, isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, indazole, purine, quinoline, isoquinoline, benzoquinoline, phthalazine, naphthyridine, quinoxaline, quinazoline, cinnoline, phenanthridine, acridine, phenanthroline, phenazine, benzimidazole, isobenzothiazole, benzoxazole, isobenzoxazole, triazole, tetrazole, oxadiazole, triazine, thiadiazole, imidazopyridine, imidazopyrimidine, and azacarbazole, but embodiments of the present disclosure are not limited thereto.

[0476] For example, the electron transport region may include a compound represented by Formula 601:

[0477] Formula 601

[0478] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21 .

[0479] In formula 601,

[0480] Ar 601 It can be substituted or unsubstituted C 5 -C 60 A carbocyclic group or a substituted or unsubstituted C 1 -C 60 Heterocyclic groups,

[0481] xe11 can be 1, 2 or 3,

[0482] L 601 Can be selected from substituted or unsubstituted C 3 -C 10 Cycloalkylene group, substituted or unsubstituted C 1 -C 10 Heterocycloalkylene group, substituted or unsubstituted C 3 -C 10 Cycloalkenylene group, substituted or unsubstituted C 1 -C10 Heterocycloalkenylene group, substituted or unsubstituted C 6 -C 60 Arylene group, substituted or unsubstituted C 1 -C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0483] xe1 can be an integer from 0 to 5,

[0484] R 601 Can be selected from substituted or unsubstituted C 3 -C 10 Cycloalkyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 Heterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 Aryl group, substituted or unsubstituted C 6 -C 60 Aryloxy groups, substituted or unsubstituted C 6 -C 60 Arylthio group, substituted or unsubstituted C 1 -C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 601 )(Q 602 )(Q 603 )、-C(=O)(Q 601 )、-S(=O) 2 (Q 601 ) and -P(=O)(Q 601 )(Q 602 ),as well as

[0485] Q 601 To Q 603 Can be independently C 1 -C 10 Alkyl group, C 1 -C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group or a naphthyl group, and

[0486] xe21 can be an integer from 1 to 5.

[0487] In one embodiment, the amount of Ar601 and xe21 number of R 601 At least one of the may comprise a π-electron-depleted nitrogen-containing ring.

[0488] In one embodiment, Ar in Formula 601 601 Can be selected from:

[0489] phenyl group, naphthalene group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenanthene group, phenanthrenes group, anthracene group, fluoranthene group, triphenylene group, pyrene group, a tetraphenyl group, a phenanthracene group, a perylene group, a pentaphenyl group, an indenoanthracene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group, a pyrimidine group, a pyridazine group, an indazole group, a purine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a phthalazine group, a naphthyridine group, a quinoxaline group, a quinazoline group, a cinnoline group, a phenanthridine group, an acridine group, a phenanthroline group, a phenazine group, a benzimidazole group, an isobenzothiazole group, a benzoxazole group, an isobenzoxazole group, a triazole group, a tetrazole group, an oxadiazole group, a triazine group, a thiadiazole group, an imidazopyridine group, an imidazopyrimidine group, and an azacarbazole group; and

[0490] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q 31 )(Q 32 )(Q 33 )、-S(=O) 2 (Q 31 ) and -P(=O)(Q 31 )(Q 32 ) is at least one substituted phenyl group, naphthyl group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenanthene group, phenanthrenyl group, anthracene group, fluoranthene group, triphenylene group, pyrene group, group, a naphthacene group, a phenanthracene group, a perylene group, a pentaphenyl group, an indenoanthracene group, a dibenzofuran group, a dibenzothiophene group, a carbazole group, an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, an oxazole group, an isoxazole group, a pyridine group, a pyrazine group, a pyrimidine group, a pyridazine group, an indazole group, a purine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a phthalazine group, a naphthyridine group, a quinoxaline group, a quinazoline group, a cinnoline group, a phenanthridine group, an acridine group, a phenanthroline group, a phenazine group, a benzimidazole group, an isobenzothiazole group, a benzoxazole group, an isobenzoxazole group, a triazole group, a tetrazole group, an oxadiazole group, a triazine group, a thiadiazole group, an imidazopyridine group, an imidazopyrimidine group, and an azacarbazole group, and

[0491] Q 31 To Q 33 Can be independently selected from C 1 -C 10 Alkyl group, C 1 -C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0492] When xe11 in formula 601 is two or more, two or more Ar 601 can be connected to each other via a single bond.

[0493] In one or more than one embodiment, Ar in Formula 601 601 It may be an anthracene group.

[0494] In one or more than one embodiments, the compound represented by Formula 601 can be represented by Formula 601-1:

[0495] Formula 601-1

[0496]

[0497] In formula 601-1,

[0498] X 614 Can be N or C (R 614 ), X 615 Can be N or C (R 615 ), X 616 Can be N or C (R 616 ), and selected from X 614 To X 616 At least one of may be N,

[0499] L 611 To L 613 can be independently related to L 601 Same as described,

[0500] xe611 to xe613 can each be independently defined to be the same as xe1,

[0501] R 611 To R 613 can be independently compared with R 601 Same as described, and

[0502] R 614 To R 616 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0503] In one embodiment, L in Formula 601 and Formula 601-1 601 and L 611 To L 613 Can be independently selected from:

[0504] a phenylene group, a naphthylene group, a fluorenylene group, a spiro-difluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenanthrenylene group, an anthrylene group, a fluoranthenylene group, a phenylene group, a pyrenyl ... a phenylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothiophenylene group, a dibenzofuranyl group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, a pyridinylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a thiadiazolylene group, an oxadiazolylene group , pyrazinylene groups, pyrimidinylene groups, pyridazinylene groups, triazinylene groups, quinolinylene groups, isoquinolinylene groups, benzoquinolinylene groups, phthalazinylene groups, naphthyridinylene groups, quinoxalinylene groups, quinazolinylene groups, cinnolinylene groups, phenanthridinylene groups, acridinylene groups, phenanthrolinylene groups, phenazinylene groups, benzimidazolylene groups, isobenzothiazolylene groups, benzoxazolylene groups, isobenzoxazolylene groups, triazolylene groups, tetrazolylene groups, imidazopyridinylene groups, imidazopyrimidinylene groups, and azacarbazolylene groups; and

[0505] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolyl group, an isoquinolyl group, a benzoquinoline group, a The invention also includes a phenylene group substituted by at least one of a phthalazinyl group, a naphthyl 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, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group and an azacarbazolyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracene group, a fluoranthenyl group, a phenylene group, a pyrenyl ... a phenylene group, a perylene group, a pentphenylene group, a hexaphenylene group, a pentphenylene group, a thienylene group, a furanylene group, a carbazolylene group, an indolylene group, an isoindolylene group, a benzofuranylene group, a benzothiophenylene group, a dibenzofuranyl group, a dibenzothiophenylene group, a benzocarbazolylene group, a dibenzocarbazolylene group, a dibenzosilylene group, a pyridinylene group, an imidazolylene group, a pyrazolylene group, a thiazolylene group, an isothiazolylene group, an oxazolylene group, an isoxazolylene group, a thiadiazolylene group, an oxadiazolylene group a pyrazinylene group, a pyrimidinylene group, a pyridazinylene group, a triazinylene group, a quinolylene group, an isoquinolylene group, a benzoquinolylene group, a phthalazinylene group, a naphthyridinylene group, a quinoxalinylene group, a quinazolinylene group, a cinnolinylene group, a phenanthridinylene group, an acridinylene group, a phenanthrolinylene group, a phenazinylene group, a benzimidazolylene group, an isobenzothiazolylene group, a benzoxazolylene group, an isobenzoxazolylene group, a triazolylene group, a tetrazolylene group, an imidazopyridylene group, an imidazopyrimidinylene group, and an azacarbazolylene group,

[0506] However, embodiments of the present disclosure are not limited thereto.

[0507] In one or more than one embodiments, xe1 and xe611 to xe613 in Formula 601 and Formula 601-1 can each independently be 0, 1 or 2.

[0508] In one or more than one embodiments, R in Formula 601 and Formula 601-1 601 and R 611 To R 613 Can be independently selected from:

[0509] a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group a benzoxazolyl group, a benzoxazolyl group, a benzoxazolyl group, a triazine group, a quinolyl group, an isoquinolyl group, a benzoquinolyl 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, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group, and an azacarbazolyl group;

[0510] Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, C 1 -C 20 Alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group, a pyrazinyl group, a pyrimidinyl group, a pyridazinyl group, a triazinyl group, a quinolyl group, an isoquinolyl group, a benzoquinoline group, a a phenyl group substituted by at least one of a benzoimidazole 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, an isobenzothiazolyl group, a benzoxazolyl group, an isobenzoxazolyl group, a triazolyl group, a tetrazolyl group, an imidazopyridinyl group, an imidazopyrimidinyl group and an azacarbazolyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorenyl group, a spiro-bifluorenyl group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthrenyl group, an anthracenyl group, a fluoranthenyl group, a triphenylenyl group, a pyrenyl group, a phenyl group, a peryl group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a thienyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuranyl group, a benzothiophenyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzothioyl group, a pyridyl group, an imidazolyl group, a pyrazolyl group, a thiazolyl group, an isothiazolyl group, an oxazolyl group, an isoxazolyl group, a thiadiazolyl group, an oxadiazolyl group , pyrazinyl groups, pyrimidinyl groups, pyridazinyl groups, triazinyl groups, quinolyl groups, isoquinolyl groups, benzoquinolyl groups, phthalazinyl groups, naphthyridinyl groups, quinoxalinyl groups, quinazolinyl groups, cinnolinyl groups, phenanthridinyl groups, acridinyl groups, phenanthrolinyl groups, phenazinyl groups, benzimidazolyl groups, isobenzothiazolyl groups, benzoxazolyl groups, isobenzoxazolyl groups, triazolyl groups, tetrazolyl groups, imidazopyridinyl groups, imidazopyrimidinyl groups, and azacarbazolyl groups; and

[0511] -S(=O) 2 (Q 601 ) and -P(=O)(Q 601 )(Q 602 ),as well as

[0512] Q 601 and Q 602 Same as described above in this article.

[0513] The electron transport region may include at least one compound selected from Compound ET1 to Compound ET36, but embodiments of the present disclosure are not limited thereto:

[0514]

[0515]

[0516]

[0517]

[0518] In one or more than one embodiment, the electron transport region may include a 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq 3 , BAlq, 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ) and NTAZ:

[0519]

[0520] In one embodiment, the electron transport region may include a phosphine oxide-containing compound (e.g., TSPO1, etc.), but the embodiments of the present disclosure are not limited thereto. In one embodiment, the phosphine oxide-containing compound may be used in a hole blocking layer in the electron transport region, but the embodiments of the present disclosure are not limited thereto.

[0521] The thickness of the buffer layer, the hole blocking layer, and the electron control layer may each be about to about For example, about to about When the thicknesses of the buffer layer, the hole blocking layer, and the electron control layer are within these ranges, the electron transport region may have excellent electron blocking characteristics or electron control characteristics without a significant increase in driving voltage.

[0522] The thickness of the electron transport layer can be about to about For example, about to about When the thickness of the electron transport layer is within the range described herein above, the electron transport layer may have suitable or satisfactory electron transport characteristics without a significant increase in driving voltage.

[0523] The electron transport region (eg, an electron transport layer in the electron transport region) may further include a metal-containing material in addition to the materials described herein above.

[0524] The metal-containing material may include at least one selected from an alkali metal complex and an alkaline earth metal complex. The alkali metal complex may include a metal ion selected from Li ions, Na ions, K ions, Rb ions and Cs ions, and the alkaline earth metal complex may include a metal ion selected from Be ions, Mg ions, Ca ions, Sr ions and Ba ions. The ligand coordinated with the metal ion of the alkali metal complex or the alkaline earth metal complex may be selected from hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline and cyclopentadiene, but the embodiments of the present disclosure are not limited thereto.

[0525] For example, the metal-containing material may include a Li complex. The Li complex may include, for example, compound ET-D1 (lithium hydroxyquinoline, LiQ) or compound ET-D2:

[0526]

[0527] The electron transport region may include an electron injection layer that facilitates electron injection from the second electrode 190 .

[0528] The electron injection layer may have i) a single-layer structure including a single layer including a single material, ii) a single-layer structure including a single layer including a plurality of different materials, or iii) a multi-layer structure including a plurality of layers including a plurality of different materials.

[0529] The electron injection layer may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

[0530] The alkali metal may be selected from Li, Na, K, Rb, and Cs. In one embodiment, the alkali metal may be Li, Na, or Cs. In one or more than one embodiment, the alkali metal may be Li or Cs, but the embodiments of the present disclosure are not limited thereto.

[0531] The alkaline earth metal may be selected from Mg, Ca, Sr and Ba.

[0532] The rare earth metal may be selected from Sc, Y, Ce, Tb, Yb and Gd.

[0533] The alkali metal compound, alkaline earth metal compound and rare earth metal compound may be selected from oxides and halides (eg, fluorides, chlorides, bromides or iodides) of alkali metals, alkaline earth metals and rare earth metals.

[0534] The alkali metal compound may be selected from alkali metal oxides (such as Li2 O, Cs 2 O or K 2 O) and an alkali metal halide (e.g., LiF, NaF, CsF, KF, LiI, NaI, CsI, or KI). In one embodiment, the alkali metal compound may be selected from LiF, Li 2 O, NaF, LiI, NaI, CsI, and KI, but the embodiments of the present disclosure are not limited thereto.

[0535] The alkaline earth metal compound may be selected from alkaline earth metal oxides, such as BaO, SrO, CaO, Ba x Sr 1-x O (0 < x < 1) or Ba x Ca 1-x O (0 < x < 1). In one embodiment, the alkaline earth metal compound may be selected from BaO, SrO, and CaO, but the embodiments of the present disclosure are not limited thereto.

[0536] The rare earth metal compound may be selected from YbF 3 , ScF 3 , Sc 2 O 3 , Y 2 O 3 , Ce 2 O 3 , GdF 3 and TbF 3 . In one embodiment, the rare earth metal compound may be selected from YbF 3 , ScF 3 , TbF 3 , YbI 3 , ScI 3 and TbI 3 , but the embodiments of the present disclosure are not limited thereto.

[0537] The alkali metal complex, alkaline earth metal complex, and rare earth metal complex may contain ions of the alkali metal, alkaline earth metal, and rare earth metal as described above herein, and the ligands coordinated to the metal ions of the alkali metal complex, alkaline earth metal complex, or rare earth metal complex may be selected from hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, and cyclopentadiene, but the embodiments of the present disclosure are not limited thereto.

[0538] The electron injection layer may include (or be composed of) the following: alkali metals, alkaline earth metals, rare earth metals, alkali metal compounds, alkaline earth metal compounds, rare earth metal compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof as described above herein. In one or more than one embodiments, the electron injection layer may further include organic materials. When the electron injection layer further includes organic materials, alkali metals, alkaline earth metals, rare earth metals, alkali metal compounds, alkaline earth metal compounds, rare earth metal compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix comprising organic materials.

[0539] The thickness of the electron injection layer can be about to about For example, about to about When the thickness of the electron injection layer is within the range described herein above, the electron injection layer may have suitable or satisfactory electron injection characteristics without a significant increase in driving voltage.

[0540] The second electrode 190

[0541] The second electrode 190 may be 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 forming the second electrode 190 may be selected from metals, alloys, conductive compounds, and combinations thereof having a relatively low work function.

[0542] The second electrode 190 may include at least one selected from lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ITO, and IZO, but the embodiments of the present disclosure are not limited thereto. The second electrode 190 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0543] The second electrode 190 may have a single-layer structure, or a multi-layer structure including two or more layers.

[0544] In one embodiment, the organic light-emitting devices 10, 20, 30, 31, and 32 may each further include a capping layer positioned in a direction in which light is emitted. The capping layer may increase external light emission efficiency according to the principle of constructive interference.

[0545] The covering layers may each independently be an organic covering layer including an organic material, an inorganic covering layer including an inorganic material, or a composite covering layer including an organic material and an inorganic material.

[0546] The covering layer may include at least one material selected from carbocyclic compounds, heterocyclic compounds, amine-based compounds, porphyrin derivatives, phthalocyanine derivatives, naphthalocyanine derivatives, alkali metal complexes, and alkaline earth metal complexes. The carbocyclic compounds, heterocyclic compounds, and amine-based compounds may be optionally substituted with a substituent containing at least one element selected from O, N, S, Se, Si, F, Cl, Br, and I.

[0547] In one embodiment, the cover layer may include an amine-based compound.

[0548] In one or more than one embodiments, the covering layer may include the compound represented by Formula 201 or the compound represented by Formula 202.

[0549] In one or more than one embodiment, the covering layer may include a compound selected from Compound HT28 to Compound HT33 and Compound CP1 to Compound CP5, but the embodiments of the present disclosure are not limited thereto:

[0550]

[0551] In the above, it has been combined Figures 1 to 5 The organic light-emitting device according to the embodiment is described, but the embodiments of the present disclosure are not limited thereto.

[0552] The layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region can be formed in a certain region by using one or more suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing, and laser induced thermal imaging.

[0553] When the layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region are formed by vacuum deposition, the deposition temperature may be about 100° C. to about 500° C., about 10 -8 About 10 -3 Torr vacuum and approx. / second to about The deposition was carried out at a deposition rate of 1000 nm / s.

[0554] When a layer constituting a hole transport region, an emission layer, and a layer constituting an electron transport region are formed by spin coating, spin coating can be performed at a coating speed of about 2,000 rpm to about 5,000 rpm and at a heat treatment temperature of about 80°C to 200°C by considering the composition of the material to be included in the layer to be formed and the structure of the layer to be formed.

[0555] Hereinafter, the compound according to the embodiment and the organic light-emitting device according to the embodiment will be described in more detail with reference to Examples. The expression "using B instead of A" used in describing the Examples means replacing a molar equivalent of A with the same number of molar equivalents of B.

[0556] Example

[0557] Example 1

[0558] Corning 15Ω / cm 2 The ITO glass substrate was cut into a size of 50 mm×50 mm×0.7 mm, ultrasonically treated with isopropyl alcohol and pure water for 5 minutes each, and then cleaned by exposure to ultraviolet rays and ozone for 30 minutes.Then, the ITO glass substrate was provided to a vacuum deposition apparatus.

[0559] HAT-CN was vacuum deposited on an ITO glass substrate to form a A hole injection layer having a thickness of , and a hole transport compound HT1 is vacuum deposited on the hole injection layer to form a The hole transport layer has a thickness of .

[0560] Compound B1 was vacuum deposited on the hole transport layer to form a Compound H8 and compound FD1 (dopant compound) were co-deposited on the first HT layer at a weight ratio of 97:3 to form a first hole transport (HT) layer having a thickness of The thickness of the emission layer.

[0561] Compound E1 is vacuum deposited on the emission layer to form a A first electron transport (ET) layer having a thickness of .

[0562] Compound ET1 (electron transport layer compound) and LiQ were co-deposited at a ratio of 5:5 to form The first light emitting unit has a thickness of .

[0563] Compound nCGL1 (n-type charge generating material) and Li were co-deposited on the first light emitting unit at a weight ratio of 99:1 to form a HAT-CN is deposited on the n-type charge generation layer to a thickness of The thickness of the compound HT1 (hole transport material) is deposited to Compound H8 and compound FD1 (dopant compound) were co-deposited at a weight ratio of 97:3 to form a p-type charge generation layer. Compound E1 is vacuum deposited onto To form a first electron transport (ET) layer, compound ET1 (electron transport layer compound) and LiQ were co-deposited at a ratio of 5:5. , thereby forming a second light emitting unit.

[0564] Alkali metal halide LiQ is deposited on the second light emitting unit to form a The electron injection layer is formed by vacuum deposition of Al A thickness of (cathode electrode) is formed to form an electrode, thereby completing the manufacture of the organic light-emitting device.

[0565]

[0566] Comparative Example 1

[0567] An organic light-emitting device was manufactured in substantially the same manner as in Example 1, except that Compound CB1 was used instead of Compound B1 in forming the first hole transport (HT) layer.

[0568]

[0569] Comparative Example 2

[0570] An organic light-emitting device was manufactured in substantially the same manner as in Example 1, except that Compound CH1 was used instead of Compound H8 in forming the emission layer.

[0571]

[0572] Comparative Example 3

[0573] An organic light-emitting device was manufactured in substantially the same manner as in Example 1, except that Compound CB2 was used instead of Compound B1 in forming the first hole transport (HT) layer.

[0574]

[0575] Example 2

[0576] An organic light-emitting device was manufactured in substantially the same manner as in Example 1, except that Compound CE1 was used instead of Compound E1 in forming the first electron transport (ET) layer.

[0577]

[0578] Example 3

[0579] An organic light-emitting device was manufactured in substantially the same manner as in Example 1, except that Compound CE2 was used instead of Compound E1 in forming the first electron transport (ET) layer.

[0580]

[0581] Example 4

[0582] An organic light-emitting device was manufactured in substantially the same manner as in Example 1, except that compound nCGL2 was used instead of compound nCGL1 in forming the n-type charge generation layer.

[0583]

[0584] Evaluation example: Evaluation of device characteristics

[0585] The luminance was measured at 10 mA / cm2 using a Keithley SMU 236 and a luminance meter PR650 (at 600 nits). 2 The driving voltage, luminous efficiency, and color coordinates of the organic light-emitting devices manufactured according to Examples 1 to 4 and Comparative Examples 1 to 3 were measured at a current density of , and the results are shown in Table 1.

[0586] In addition, the HOMO energy level, LUMO energy level, S and 1 Energy level, T 1 Energy levels and minimum bond dissociation energies, and the results are shown in Table 2.

[0587] Table 1

[0588]

[0589] Table 2

[0590]

[0591] Referring to Table 1 and Table 2, it can be seen that the organic light-emitting devices of Examples 1 to 4 have excellent driving voltage, efficiency, and / or lifespan characteristics compared to those of Comparative Examples 1 to 3.

[0592] Organic light emitting devices may have a long lifetime.

[0593] It should be understood that the embodiments described herein should be considered in a descriptive sense only and not for purposes of limitation. Descriptions of features or aspects within each embodiment should be considered available for other similar features or aspects in other embodiments.

[0594] It should be understood that although the terms "first", "second", "third", etc. can be used to describe various elements, components, regions, layers and / or parts in this article, these elements, components, regions, layers and / or parts should not be limited by these terms. These terms are used to distinguish one element, component, region, layer or part from another element, component, region, layer or part. Therefore, without departing from the spirit and scope of the present disclosure, the first element, component, region, layer or part described above can be referred to as the second element, component, region, layer or part.

[0595] For ease of explanation, spatial relative terms such as "under", "lower", "below", "below", "above", "upper", etc. may be used herein to describe the relationship of one element or feature to another element or feature, as illustrated in the accompanying drawings. It should be understood that, in addition to the directions described in the accompanying drawings, spatial relative terms are intended to cover different directions of the device in use or operation. For example, if the device in the accompanying drawings is turned over, the elements described as "under" or "under" or "below" other elements or features will be positioned "above" other elements or features. Therefore, the exemplary terms "under" and "below" can cover both the upper and lower directions. The device can be oriented in other ways (e.g., rotated 90 degrees or in other directions), and the spatial relative descriptors used in this article should be interpreted accordingly.

[0596] As used herein, the term "and / or" includes any and all combinations of one or more than one of the associated listed items. Expressions such as "at least one" when preceding a list of elements modify the entire list of elements and do not modify the individual elements of the list.

[0597] As used herein, the terms "substantially", "about" and similar terms are used as terms of approximation rather than as terms of degree, and are intended to account for inherent deviations in measured or calculated values ​​that would be recognized by those of ordinary skill in the art. In addition, the use of "may" when describing an embodiment of the present disclosure refers to "one or more than one embodiment of the present disclosure". As used herein, the terms "use", "using" and "used" may be considered to be synonymous with the terms "utilize", "utilizing" and "utilized", respectively. In addition, the term "exemplary" is intended to refer to an example or illustration.

[0598] In addition, any numerical range listed herein is intended to include all sub-ranges of the same numerical precision within the scope of the listing. For example, the range of "1.0 to 10.0" is intended to include all sub-ranges between the listed minimum value 1.0 and the listed maximum value 10.0 (and including the end value), that is, having a minimum value equal to or greater than 1.0 and a maximum value equal to or less than 10.0, such as 2.4 to 7.6. Any maximum numerical value listed herein is intended to include all lower numerical limits included therein, and any minimum numerical value listed in this specification is intended to include all higher numerical limits included therein. Therefore, the applicant reserves the right to modify this specification (including claims) to explicitly list any sub-ranges included in the scope explicitly listed herein.

[0599] Although one or more embodiments have been described with reference to the accompanying drawings, it will be understood by those skilled in the art that various suitable changes in form and details may be made therein without departing from the spirit and scope as defined by the claims and their equivalents.

Claims

1. An organic light-emitting device, comprising: a first electrode; a second electrode facing the first electrode; as well as an organic layer between the first electrode and the second electrode and including at least one light emitting unit, The at least one light emitting unit comprises: a transmitting layer; and a hole transport region between the first electrode and the emissive layer and including a first hole transport layer, The emitting layer comprises a body, The first hole transport layer comprises a first compound, The minimum bond dissociation energy BDE of the first compound 1HT Greater than the triplet energy T of the host 1,主体 , The minimum bond dissociation energy (BDE) of the subject 主体 Greater than the triplet energy T of the host 1,主体 ,as well as The first compound includes a compound represented by Formula 41: <Formula 41> Among them, in formula 41, X 11 To X 13 are each independently a single bond, O, S, N(R4), C(R4)(R5) or Si(R4)(R5), X 21 To X 23 are each independently a single bond, O, S, N(R6), C(R6)(R7) or Si(R6)(R7), m11 and m21 are each independently 0, 1 or 2, Ar1 is selected from substituted or unsubstituted C3-C 10 Cycloalkylene group, substituted or unsubstituted C1-C 10 Heterocycloalkylene group, substituted or unsubstituted C3-C 10 Cycloalkenylene group, substituted or unsubstituted C1-C 10 Heterocycloalkenylene group, substituted or unsubstituted C6-C 60 Arylene group, substituted or unsubstituted C1-C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, and R4 to R7, R 11 To R 18 and R 21 To R 28 are each independently selected from substituted or unsubstituted C6-C 60 Aryl group, substituted or unsubstituted C1-C 60 heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -C(=O)(Q1), -N(Q1)(Q2), -P(=O)(Q1)(Q2) and -S(=O)2(Q1)(Q2), wherein the at least one light emitting unit further comprises an electron transport region between the second electrode and the emission layer and comprising a first electron transport layer, The first electron transport layer comprises a second compound, and The triplet energy T of the second compound 1,1ET Greater than the triplet energy T of the host 1,主体 , Wherein the second compound comprises a compound represented by Formula 50: <Formula 50> Wherein, in formula 50, Y 51 To Y 53 Each independently is N or C(R 50 ), Selected from Y 51 To Y 53 At least one of them is N, X 51 is O, S, N(R 59 ), C(R 59 )(R 60 ), or Si(R 59 )(R 60 ), Ar 51 Represents and selected from R 51 To R 58 One of the attachment sites in Ar 52 ,Ar 53 and R 50 To R 60 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1-C 60 Alkyl group, substituted or unsubstituted C2-C 60 Alkenyl group, substituted or unsubstituted C2-C 60 Alkynyl group, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl group, substituted or unsubstituted C3-C 10 Cycloalkenyl group, substituted or unsubstituted C1-C 10 Heterocycloalkenyl group, substituted or unsubstituted C6-C 60 Aryl group, substituted or unsubstituted C6-C 60 Aryloxy group, substituted or unsubstituted C6-C 60 Arylthio group, substituted or unsubstituted C1-C 60 heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -C(=O)(Q1), -N(Q1)(Q2), -P(=O)(Q1)(Q2) and -S(=O)2(Q1)(Q2), R 59 and R 60 Optionally linked to form a substituted or unsubstituted C5-C 60 Carbocyclic group or substituted or unsubstituted C1-C 60 Heterocyclic groups, The substituted C5-C 60 Carbocyclic group, the substituted C1-C 60 Heterocyclic group, the substituted C1-C 60 Alkyl group, the substituted C2-C 60 Alkenyl group, the substituted C2-C 60 Alkynyl group, the substituted C1-C 60 Alkoxy group, the substituted C3-C 10 Cycloalkyl group, the substituted C1-C 10 Heterocycloalkyl group, the substituted C3-C 10 Cycloalkenyl group, the substituted C1-C 10 Heterocycloalkenyl group, the substituted C6-C 60 Aryl group, the substituted C6-C 60 Aryloxy group, the substituted C6-C 60 Arylthio group, the substituted C1-C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic fused polycyclic group and the substituted monovalent non-aromatic fused heteropolycyclic group is selected from: Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazine group, hydrazone group, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups and C1-C 60 Alkoxy groups; Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups and C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) and -P(=O)(Q 31 )(Q 32 ), and Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C1-C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

2. The organic light emitting device according to claim 1, wherein: The singlet energy S of the subject 1,主体 and the triplet energy T of the subject 1,主体 Satisfies the equation T: <Equation T> S 1主体 <2×T 1主体 。 3. The organic light emitting device according to claim 2, wherein: The ratio of the triplet-triplet fusion component emitted from the emission layer to the total emission component is 30% or more.

4. The organic light emitting device according to claim 1, wherein: The lowest unoccupied molecular orbital energy LUMO of the first compound 1HT and the lowest unoccupied molecular orbital energy LUMO of the subject 主体 satisfies equation A, and The electron mobility μ of the host 主体 and the electron mobility μ of the first compound 1HT Satisfies equation B: <Equation A> |LIGHT 1HT |<|LIGHT 主体 | <Equation B> m 1HT <m 主体 。 5. The organic light emitting device according to claim 1, wherein: The first hole transport layer is in direct contact with the emission layer.

6. The organic light emitting device according to claim 1, wherein: The lowest unoccupied molecular orbital energy LUMO of the host 主体 and the lowest unoccupied molecular orbital energy LUMO of the second compound 1ET Satisfies equation E: <Equation E> ||LIGHT 1ET |-|LIGHT 主体 ||≤0.3eV.

7. The organic light emitting device according to claim 1, wherein: The first electron transport layer is in direct contact with the emission layer.

8. The organic light emitting device according to claim 1, wherein: The host includes a compound represented by Formula 30: <Formula 30> Wherein, in formula 30, L 31 and L 32 is substituted or unsubstituted C6-C 60 Arylene group, m31 and m32 are each independently an integer from 0 to 5, Ar 31 ,Ar 32 and R 31 To R 38 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1-C 60 Alkyl group, substituted or unsubstituted C2-C 60 Alkenyl group, substituted or unsubstituted C2-C 60 Alkynyl group, substituted or unsubstituted C1-C 60 Alkoxy groups, substituted or unsubstituted C6-C 60 Aryl group, substituted or unsubstituted C6-C 60 Aryloxy group, substituted or unsubstituted C6-C 60 Arylthio group, substituted or unsubstituted C1-C 60 heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -C(=O)(Q1), -N(Q1)(Q2), -P(=O)(Q1)(Q2) and -S(=O)2(Q1)(Q2), Selected from Ar 31 and Ar 32 At least one of them is a substituted or unsubstituted C6-C 60 Aryl groups, The substituted C6-C 60 Arylene group, the substituted C1-C 60 Alkyl group, the substituted C2-C 60 Alkenyl group, the substituted C2-C 60 Alkynyl group, the substituted C1-C 60 Alkoxy group, the substituted C6-C 60 Aryl group, the substituted C6-C 60 Aryloxy group, the substituted C6-C 60 Arylthio group, the substituted C1-C 60 At least one substituent of the heteroaryl group, the substituted monovalent non-aromatic fused polycyclic group and the substituted monovalent non-aromatic fused heteropolycyclic group is selected from: Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazine group, hydrazone group, C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups and C1-C 60 Alkoxy groups; Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 )、-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) at least one substituted C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl groups and C1-C 60 Alkoxy groups; C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; Each is selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl group, monovalent non-aromatic fused polycyclic group, monovalent non-aromatic fused heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 )、-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) at least one substituted C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C6-C 60 Aryloxy groups, C6-C 60 Arylthio group, C1-C 60 heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 ) and -P(=O)(Q 31 )(Q 32 ), and Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, C1-C 60 Alkoxy groups, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocycloalkyl groups, C3-C 10 Cycloalkenyl groups, C1-C 10 Heterocycloalkenyl group, C6-C 60 Aryl group, C1-C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, and a terphenyl group.

9. The organic light emitting device according to claim 8, wherein: The host includes a compound represented by Formula 31 or Formula 32: <Formula 31> <Formula 32> Among them, in equation 31 and equation 32, L 31 , L 32 、m31、m32、Ar 31 and R 31 To R 38 Each independently is the same as described in claim 8, R 41 To R 47 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C1-C 60 Alkyl groups, C2-C 60 Alkenyl groups, C2-C 60 Alkynyl group, C1-C 60 Alkoxy groups, C6-C 60 an aryl group, a monovalent non-aromatic condensed polycyclic group, a biphenyl group, and a terphenyl group, or Selected from R 41 To R 47 At least two adjacent substituents in are optionally linked to form a substituted or unsubstituted C6-C 60 Carbocyclic group.

10. The organic light emitting device according to claim 1, wherein: The second compound includes a compound represented by Formula 51: <Formula 51> Among them, in formula 51, Y 51 To Y 53 Each independently the same as described in claim 1, Ar 52 ,Ar 53 , R 50 To R 52 and R 54 To R 58 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a C1-C 20 Alkyl groups, C1-C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group, and R 59 and R 60 Connect to form C5-C 60 Carbocyclic group.

11. The organic light emitting device according to claim 1, wherein: The emitting layer further comprises a dopant, and The amount of the host is greater than the amount of the dopant.

12. The organic light emitting device according to claim 11, wherein: The dopant includes a compound represented by Formula 501: <Formula 501> Wherein, in Formula 501, Ar 501 is substituted or unsubstituted C5-C 60 Carbocyclic group or substituted or unsubstituted C1-C 60 Heterocyclic groups, L 501 To L 503 are each independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene group, substituted or unsubstituted C1-C 10 Heterocycloalkylene group, substituted or unsubstituted C3-C 10 Cycloalkenylene group, substituted or unsubstituted C1-C 10 Heterocycloalkenylene group, substituted or unsubstituted C6-C 60 Arylene group, substituted or unsubstituted C1-C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, xd1 to xd3 are each independently an integer from 0 to 3, R 501 and R 502 are each independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl group, substituted or unsubstituted C3-C 10 Cycloalkenyl group, substituted or unsubstituted C1-C 10 Heterocycloalkenyl group, substituted or unsubstituted C6-C 60 Aryl group, substituted or unsubstituted C6-C 60 Aryloxy group, substituted or unsubstituted C6-C 60 Arylthio group, substituted or unsubstituted C1-C 60 heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups and substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups, and xd4 is an integer from 1 to 6.

13. The organic light emitting device according to claim 1, wherein: The organic layer comprises: m number of light-emitting units; and m-1 number of charge generation layers between two adjacent light-emitting units among the m number of light-emitting units, The charge generation layer includes an n-type charge generation layer and a p-type charge generation layer, wherein the n-type charge generation layer includes an n-type charge generation material, and the p-type charge generation layer includes a hole transport material, m is an integer of 2 or greater, A maximum emission wavelength emitted by at least one of the m number of the light emitting units is different from a maximum emission wavelength emitted by at least one of the remaining light emitting units; and The lowest unoccupied molecular orbital energy LUMO of the n-type charge generation material contained in the n-type charge generation layer nCGL The absolute value of the highest occupied molecular orbital energy HOMO of the hole transport material contained in the p-type charge generation layer is pCGL The absolute value difference is less than 3.0 eV.

14. The organic light emitting device according to claim 13, wherein: The n-type charge generating material includes a compound represented by one selected from Formula 90 and Formula 91: <Formula 90> <Formula 91> Among them, in equation 90 and equation 91, X 91 To X 100 Each independently is N or C(R 90 ), Selected from X 91 To X 100 At least one of them is N, L 91 and L 92 are each independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene group, substituted or unsubstituted C1-C 10 Heterocycloalkylene group, substituted or unsubstituted C3-C 10 Cycloalkenylene group, substituted or unsubstituted C1-C 10 Heterocycloalkenylene group, substituted or unsubstituted C6-C 60 Arylene group, substituted or unsubstituted C1-C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, a91 and a92 are each independently an integer from 0 to 5, R 90 and R 91 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazine group, a hydrazone group, a substituted or unsubstituted C1-C 20 Alkyl groups, substituted or unsubstituted C1-C 20 Alkoxy groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocycloalkyl group, substituted or unsubstituted C3-C 10 Cycloalkenyl group, substituted or unsubstituted C1-C 10 Heterocycloalkenyl group, substituted or unsubstituted C6-C 60 Aryl group, substituted or unsubstituted C6-C 60 Aryloxy group, substituted or unsubstituted C6-C 60 Arylthio group, substituted or unsubstituted C1-C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic fused polycyclic group, substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -Si(Q 91 )(Q 92 )(Q 93 )、-C(=O)(Q 91 )、-S(=O)2(Q 91 ) and -P(=O)(Q 91 )(Q 92 ),as well as Q 91 To Q 93 Each independently is C1-C 10 Alkyl groups, C1-C 10 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group or a naphthyl group.

15. An organic light-emitting device comprising: a first electrode; a second electrode facing the first electrode; as well as an organic layer between the first electrode and the second electrode, The organic layer comprises: m number of light-emitting units; and m-1 number of charge generation layers between two adjacent light-emitting units among the m number of light-emitting units, Each of the light emitting units comprises: Emission layer; a hole transport region between the first electrode and the emissive layer and including a first hole transport layer; and an electron transport region between the second electrode and the emission layer and including a first electron transport layer, The emitting layer comprises a body, The first hole transport layer comprises a first compound, The first electron transport layer comprises a second compound, The minimum bond dissociation energy BDE of the first compound 1HT Greater than the triplet energy T of the host 1,主体 , The minimum bond dissociation energy (BDE) of the subject 主体 Greater than the triplet energy T of the host 1,主体 , The triplet energy T of the second compound 1,1ET Greater than the triplet energy T of the host 1,主体 , The charge generation layer includes an n-type charge generation layer and a p-type charge generation layer, wherein the n-type charge generation layer includes an n-type charge generation material, and the p-type charge generation layer includes a hole transport material, m is an integer of 2 or greater, A maximum emission wavelength emitted by at least one of the m number of the light emitting units is different from a maximum emission wavelength emitted by at least one of the remaining light emitting units; and The lowest unoccupied molecular orbital energy LUMO of the n-type charge generation material contained in the n-type charge generation layer nCGL The absolute value of the highest occupied molecular orbital energy HOMO of the hole transport material contained in the p-type charge generation layer is pCGL The absolute value difference is less than 3.0 eV. The host is compound H8, The first compound is compound B1, The second compound is compound E1, The n-type charge generation material contained in the n-type charge generation layer is compound nCGL1 or compound nCGL2, and The hole transport material contained in the p-type charge generation layer is compound HT1:

16. Display equipment, including: A thin film transistor including a source electrode, a drain electrode and an active layer; as well as The organic light-emitting device according to claim 1 or 15, The first electrode of the organic light-emitting device is electrically connected to one of the source electrode and the drain electrode of the thin film transistor.

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