Organic light-emitting device and apparatus including the same

Abstract

The present application relates to an organic light-emitting device having improved efficiency and service life, which includes: a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode, wherein the organic layer includes an emission layer, the emission layer contains a first compound, a second compound, a third compound, and a fourth compound, the first compound, the second compound, the third compound, and the fourth compound are different from each other, the third compound contains a metal element having an atomic number of 40 or greater than 40, the fourth compound contains boron (B), the third compound and the fourth compound each satisfy the following condition 1-1 and condition 1-2, and the fourth compound satisfies condition 2 and / or condition 3: Condition 1-1 T1(C3) 起始 ≥S1(C4) 起始 Condition 1-2 T1(C3) 最大 ≥S1(C4) 最大 Condition 2 K RISC (C4)≥10 3 S ‑1 Condition 3 f(C4)≥0.1.

Description

[0001] Cross - reference to related applications

[0002] This application claims the priority and benefit of Korean Patent Application No. 10 - 2019 - 0123356, filed with the Korean Intellectual Property Office on October 4, 2019, the entire contents of which are incorporated herein by reference. Technical field

[0003] One or more aspects of embodiments of the present disclosure relate to an organic light - emitting device and a device including the organic light - emitting device. Background art

[0004] An organic light - emitting device is a self - emissive device that can produce full - color images and also has a wide viewing angle, high contrast, short response time, and excellent characteristics in terms of brightness, driving voltage, and / or response speed.

[0005] Examples of an organic light - emitting device may include a first electrode positioned on a substrate, and a hole - transport region, an emission layer, an electron - transport region, and a second electrode sequentially positioned on the first electrode. Holes provided by the first electrode may move through the hole - transport region to the emission layer, and electrons provided by the second electrode may move through the electron - transport region to the emission layer. Charge carriers (e.g., holes and electrons) may then recombine in the emission layer to generate excitons. These excitons transition from an excited state to a ground state, thereby generating light. Summary of the invention

[0006] One or more aspects of embodiments of the present disclosure relate to an organic light - emitting device and a device including the organic light - emitting device.

[0007] Other aspects will be set forth in part in the following description, and in part will become apparent from the description, or may be learned by practice of the presented embodiments of the present disclosure.

[0008] One or more embodiments include an organic light - emitting device including a first electrode,

[0009] a second electrode, and

[0010] an organic layer between the first electrode and the second electrode,

[0011] wherein the organic layer includes an emission layer,

[0012] the emission layer contains a first compound, a second compound, a third compound, and a fourth compound,

[0013] the first compound, the second compound, the third compound, and the fourth compound are different from each other,

[0014] The third compound contains a metal element with an atomic number of 40 or greater than 40.

[0015] The fourth compound contains boron (B).

[0016] The third compound and the fourth compound each satisfy the following Condition 1-1 and Condition 1-2, and

[0017] The fourth compound satisfies Condition 2 and / or Condition 3:

[0018] Condition 1-1

[0019] T 1 (C3) 起始 ≥S 1 (C4) 起始

[0020] Condition 1-2

[0021] T 1 (C3) 最大 ≥S 1 (C4) 最大

[0022] Condition 2

[0023] K RISC (C4)≥10 3 S -1

[0024] Condition 3

[0025] f(C4)≥0.1,

[0026] wherein in Condition 1-1, Condition 1-2, Condition 2, and Condition 3,

[0027] S 1 (C4) 起始 is the singlet energy of the fourth compound at the starting wavelength (λ 起始 ) of the photoluminescence (PL) spectrum;

[0028] T 1 (C3) 起始 is the triplet energy of the third compound at the starting wavelength of the PL spectrum;

[0029] S 1 (C4) 最大 is the singlet energy of the fourth compound at the maximum emission wavelength (λ 最大 ) of the PL spectrum;

[0030] T 1 (C3)最大 is the triplet energy of the third compound at the maximum emission wavelength of the photoluminescence spectrum;

[0031] K RISC (C4) is the reverse intersystem crossing (RISC) constant of the fourth compound; and

[0032] f(C4) is the oscillator strength of the fourth compound.

[0033] One or more embodiments include an apparatus 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 the source electrode or the drain electrode of the thin film transistor. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The above and other aspects, features, and advantages of certain embodiments of the present disclosure will become more apparent from the following description when taken in conjunction with the accompanying drawings, in which:

[0035] Figure 1 is a schematic diagram of an organic light emitting device according to an embodiment;

[0036] Figure 2 is a schematic diagram of an organic light emitting device according to another embodiment;

[0037] Figure 3 is a schematic diagram of an organic light emitting device according to another embodiment; and

[0038] Figure 4 is a schematic diagram of an organic light emitting device according to another embodiment. DETAILED DESCRIPTION

[0039] Reference will now be made in more detail to the embodiments, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout. In this regard, the present embodiments may have different forms and should not be construed as limited to the description set forth herein. Accordingly, the embodiments are described below only by reference to the drawings to explain aspects of the present description. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items. Throughout the disclosure, the expression "at least one of a, b, and c" means only a, only b, only c, both a and b, both a and c, both b and c, all of a, b, and c, or variants thereof. Expressions such as "at least one of...", "one of...", and "selected from..." when preceding a list of elements modify the entire list of elements and not a single element of the list. Further, the use of "may" when describing embodiments of the present invention refers to "one or more embodiments of the present invention".

[0040] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the accompanying drawings. The same or corresponding components will be denoted by the same reference numerals, and thus redundant descriptions thereof will not be provided.

[0041] 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.

[0042] It should also be understood that the term "comprises" or "comprising" as used herein specifies the presence of the stated feature or component, but does not preclude the presence or addition of one or more other features or components.

[0043] As used herein, the terms "use", "using", and "used" may be considered to be synonymous with the terms "utilize", "utilizing", and "utilized", respectively.

[0044] 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 can be directly or indirectly formed on the other layer, region, or component. That is, for example, intervening layers, regions, or components may exist. In contrast, when a layer, region, or component is referred to as being "directly" "on" or "onto" another layer, region, or component, intervening layers, regions, or components may not exist.

[0045] For ease of explanation, the dimensions of the elements in the drawings may be enlarged. In other words, since the dimensions and thicknesses of the components in the drawings may be arbitrarily illustrated for ease of explanation, the following embodiments of the present disclosure are not limited thereto.

[0046] As used herein, the term "organic layer" refers to a single layer and / or multiple layers between the first electrode and the second electrode of an organic light-emitting device. The materials included in the "organic layer" are not limited to organic materials.

[0047] Embodiments of the present disclosure provide an organic light-emitting device, comprising:

[0048] a first electrode,

[0049] a second electrode, and

[0050] an organic layer between the first electrode and the second electrode,

[0051] wherein the organic layer includes an emission layer,

[0052] the emission layer contains a first compound, a second compound, a third compound, and a fourth compound,

[0053] the first compound, the second compound, the third compound, and the fourth compound are different from each other,

[0054] the third compound contains a metal element having an atomic number of 40 or greater than 40,

[0055] the fourth compound contains boron (B),

[0056] the third compound and the fourth compound each satisfy the following condition 1-1 and condition 1-2, and

[0057] the fourth compound satisfies the following condition 2 and / or condition 3:

[0058] Condition 1-1

[0059] T 1 (C3) 起始 ≥S 1 (C4) 起始

[0060] Condition 1-2

[0061] T 1 (C3) 最大 ≥S 1 (C4) 最大

[0062] Condition 2

[0063] K RISC (C4)≥10 3 S -1

[0064] Condition 3

[0065] f(C4)≥0.1.

[0066] Among Conditions 1-1, 1-2, 2, and 3,

[0067] S 1 (C4) 起始 is the singlet energy of the fourth compound at the starting wavelength (λ 起始 ) of the photoluminescence (PL) spectrum;

[0068] T 1 (C3) 起始 is the triplet energy of the third compound at the starting wavelength of the PL spectrum;

[0069] S 1 (C4) 最大 is the singlet energy of the fourth compound at the maximum emission wavelength (λ 最大 ) of the PL spectrum;

[0070] T 1 (C3) 最大 is the triplet energy of the third compound at the maximum emission wavelength of the photoluminescence spectrum;

[0071] K RISC (C4) is the reverse intersystem crossing (RISC) constant of the fourth compound;

[0072] f(C4) is the oscillator strength of the fourth compound.

[0073] As used herein, the term "singlet energy at the starting wavelength" refers to the singlet energy at the start of the PL spectrum and can be calculated by the singlet energy at the point where the function obtained by plotting the PL spectrum as a quadratic function intersects the wavelength axis (i.e., the x-intercept).

[0074] As used herein, the term "triplet energy at the starting wavelength" refers to the triplet energy at the start of the PL spectrum and can be calculated by the triplet energy at the point where the function obtained by plotting the PL spectrum as a quadratic function intersects the wavelength axis (i.e., the x-intercept).

[0075] In this regard, the room temperature PL spectrum was measured at room temperature using a PL measurement device with a 1×10 -5 M compound dissolved in toluene; and the low temperature PL spectrum was measured at low temperature (77 K) using a 1×10 -5 M compound dissolved in THF. Compared with the room temperature PL spectrum, the peaks found only at low temperature were analyzed, and the singlet energy level and triplet energy level were thereby obtained.

[0076] K RISC (C4) is calculated by Equation 1:

[0077] Equation 1

[0078]

[0079] In Equation 1, φ PL is the photoluminescence quantum yield of the fast luminescence component derived from the transient electroluminescence spectrum of the fourth compound,

[0080] k r is the radioactive decay rate constant of the fourth compound from S1 to S0 and is calculated by the following Equation 2.

[0081] Equation 2

[0082]

[0083] τ p is the lifetime of the luminescence component derived from the transient electroluminescence spectrum of the fourth compound,

[0084] τ d is the lifetime of the luminescence component derived from the delayed electroluminescence spectrum of the fourth compound,

[0085] f(C4) is calculated by using a non-empirical molecular orbital method. Specifically, it is calculated in the form of B3LYP / 6-31G(d) using Gaussian 09 from Gaussian Inc.

[0086] For example, the first compound can be represented by the following Formula 1,

[0087] the second compound can be represented by the following Formula 10,

[0088] the third compound can be represented by the following Formula 3, and

[0089] the fourth compound can be represented by the following Formula 4,

[0090] Formula 1

[0091]

[0092] Formula 10

[0093]

[0094] Formula 3

[0095]

[0096] Formula 4

[0097]

[0098] In Formula 1, Formula 3, Formula 4 and Formula 10,

[0099] X 11 Can be selected from O, S, N (R 19 ) and C(R 19 )(R 20 ),

[0100] R 11 To R 20 Can be independently selected from:

[0101] By *-(L 11 ) a11 -A 11 The groups represented by hydrogen, deuterium, C 1 -C 60 Alkyl groups, π-electron-depleted nitrogen-free cyclic groups, -C(Q 1 )(Q 2 )(Q 3 )、-Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 ) and -N(Q 1 )(Q 2 );

[0102] Selected from deuterium, C 1 -C 60 Alkyl groups, π-electron-depleted nitrogen-free cyclic groups, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) at least one substituted π-electron-depleted nitrogen-free cyclic group; and

[0103] Selected from deuterium, C 1 -C 60 Alkyl groups, π-electron-depleted nitrogen-free cyclic groups, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22at least one substituted π - electron - depleted nitrogen - free cyclic group substituted π - electron - depleted nitrogen - free cyclic group in

[0104] L 11 may be selected from:

[0105] π - electron - depleted nitrogen - free cyclic group, -C(Q 1 )(Q 2 ) -, -Si(Q 1 )(Q 2 ) -, -B(Q 1 ) - and -N(Q 1 ) -; and

[0106] substituted by at least one selected from deuterium, C 1 -C 60 alkyl group, π - electron - depleted nitrogen - free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ) -, -Si(Q 31 )(Q 32 )(Q 33 ) -, -B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) of at least one substituted π - electron - depleted nitrogen - free cyclic group,

[0107] a11 may be selected from 1, 2 and 3,

[0108] A 11 may be selected from:

[0109] π - electron - depleted nitrogen - free cyclic group;

[0110] substituted by at least one selected from deuterium, C 1 -C 60 alkyl group, π - electron - depleted nitrogen - free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ) -, -Si(Q 31 )(Q 32 )(Q 33 ) -, -B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) of at least one substituted π - electron - depleted nitrogen - free cyclic group; and

[0111] composed of at least one selected from deuterium, C 1 -C 60 alkyl group, π - electron - depleted nitrogen - free cyclic group, -C(Q 21)(Q 22 )(Q 23 )、 -Si(Q 21 )(Q 22 )(Q 23 )、 -B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) in which at least one is a substituted π - electron - depleted nitrogen - free cyclic group, a substituted π - electron - depleted nitrogen - free cyclic group

[0112] L 101 to L 103 may each independently be selected from substituted or unsubstituted C 5 -C 30 carbocyclic groups and substituted or unsubstituted C 1 -C 30 heterocyclic groups

[0113] a101 to a103 may each independently be selected from 0, 1, and 2, and

[0114] R 101 to R 103 may each independently be selected from substituted or unsubstituted C 3 -C 10 cycloalkyl groups, substituted or unsubstituted C 1 -C 10 heterocycloalkyl groups, substituted or unsubstituted C 3 -C 10 cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 heterocycloalkenyl groups, substituted or unsubstituted C 6 -C 60 aryl groups, substituted or unsubstituted C 6 -C 60 aryloxy groups, substituted or unsubstituted C 6 -C 60 arylthio groups, substituted or unsubstituted C 1 -C 60 heteroaryl groups, substituted or unsubstituted monovalent non - aromatic fused polycyclic groups, substituted or unsubstituted monovalent non - aromatic fused heteropolycyclic groups, -C(Q 1 )(Q 2 )(Q 3 )、 -Si(Q 1 )(Q 2 )(Q 3 )、 -B(Q 1 )(Q 2 )、 -N(Q 1 )(Q 2)、-P(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O)(Q 1 )、-S(=O) 2 (Q 1 )、-P(=O)(Q 1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ), and

[0115] M 31 may be selected from transition metals of the 4th, 5th and 6th periods of the periodic table of elements,

[0116] L 31 may be a ligand represented by one selected from Formula 3A to Formula 3D,

[0117] L 32 may be selected from monodentate ligands, bidentate ligands and tridentate ligands,

[0118] n31 may be 1 or 2,

[0119] n32 is selected from 0, 1, 2, 3 and 4,

[0120] A 31 to A 34 may each independently be selected from C 5 -C 30 carbocyclic groups and C 1 -C 30 heterocyclic groups,

[0121] T 31 to T 34 may each independently be selected from a single bond, a double bond, *-O-*', *-S-*', *-C(=O)-*', *-S(=O)-*', *-C(R 35 )(R 36 )-*', *-C(R 35 )=C(R 36 )-*', *-C(R 35 )=*', *-Si(R 35 )(R 36 )-*', *-B(R 35 )-*', *-N(R 35 )-*' and *-P(R 35 )-*',

[0122] k31 to k34 may each independently be selected from 1, 2 and 3,

[0123] Y31 To Y 34 can be independently selected from a single bond, *-O-*', *-S-*', *-C(R 37 )(R 38 )-*'、*-Si(R 37 )(R 38 )-*'、*-B(R 37 )-*'、*-N(R 37 )-*' and *-P(R 37 )-*',

[0124] * 1 ,* 2 ,* 3 and* 4 Each indicates that 31 The connection site,

[0125] R 31 To R 38 The 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, -C(Q1 )(Q 2 )(Q 3 )、 -Si(Q 1 )(Q 2 )(Q 3 )、 -B(Q 1 )(Q 2 )、 -N(Q 1 )(Q 2 )、 -P(Q 1 )(Q 2 )、 -C(=O)(Q 1 )、 -S(=O)(Q 1 )、 -S(=O) 2 (Q 1 )、 -P(=O)(Q 1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ), where R 31 to R 38 are optionally connected to each other to form a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group,

[0126] b31 to b34 can each independently be an integer from 0 to 10,

[0127] X 41 can be N, B, P(=)(R 44 ) or P(=S)(R 44 ),

[0128] Y 41 to Y 43 can each independently be O, S, N(R 45 )、 B(R 45 )、 C(R 45 )(R 46 ) or Si(R 45 )(R 46 ),

[0129] k41 can be 0 or 1, where, when k41 is 0, -(Y 41 ) k41 - does not exist,

[0130] A 41 to A 43 can each independently be selected from C 5 -C 30 carbocyclic groups and C 1 -C30 Heterocyclic group

[0131] R 41 to R 46 may each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amino group, an amidino group, a hydrazino group, a hydrazono 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 substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -C(Q 1 )(Q 2 )(Q 3 )、-Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-N(Q 1 )(Q 2 )、-P(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O)(Q 1 )、-S(=O) 2 (Q 1 )、-P(=O)(Q1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ), wherein R 41 to R 46 may optionally be connected to each other to form a substituted or unsubstituted C 5 -C 30 carbocyclic group or a substituted or unsubstituted C 1 -C 30 heterocyclic group,

[0132] b41 to b43 may each independently be an integer from 0 to 10, and

[0133] Q 1 to Q 3 , Q 21 to Q 23 and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 60 alkyl group, a C 2 -C 60 alkenyl group, a C 2 -C 60 alkynyl group, a C 1 -C 60 alkoxy group, a C 3 -C 10 cycloalkyl group, a C 1 -C 10 heterocycloalkyl group, a C 3 -C 10 cycloalkenyl group, a C 1 -C 10 heterocycloalkenyl group, a C 6 -C 60 aryl group, a C 6 -C 60 aryloxy group, a C 6 -C 60 arylthio group, a C 1 -C 60 heteroaryl group, a C 1 -C 60 heteroaryloxy group, a C 1 -C 60 heteroarylthio group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, a biphenyl group, and a terphenyl group,

[0134] For example, R 11 to R19 At least one of them can be a group represented by *-(L 11 ) a11 -A 11 group.

[0135] For example, X in Formula 1 11 can be N(R 19 ).

[0136] For example, R in Formula 1 11 to R 20 can each independently be selected from:

[0137] a group represented by *-(L 11 ) a11 -A 11 group, hydrogen, deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group, dinaphthothiophenyl group, -C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ) and -N(Q 1 )(Q 2 );

[0138] each independently being selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group, dinaphthothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31)(Q 32 ), and -N(Q 31 )(Q 32 ) and at least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group and dinaphthothiophenyl group; and

[0139] each independently selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group, dinaphthothiophenyl group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ), and -N(Q 21 )(Q 22 ), and at least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group and dinaphthothiophenyl group, and at least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group and dinaphthothiophenyl group.

[0140] For example, L in Formula 1 11may be selected from:

[0141] a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a benzophenanthrene group, a phenanthrene group, a pyrene group, a group, a perylene group, a fluorene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, -C(Q 1 )(Q 2 )- and -Si(Q 1 )(Q 2 ); and

[0142] each of which is substituted by at least one selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, a group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ) of a benzene group, a naphthalene group, a phenalene group, an anthracene group, a fluoranthene group, a benzophenanthrene group, a phenanthrene group, a pyrene group, a group, a perylene group, a fluorene group, a carbazole group, a dibenzofuran group and a dibenzothiophene group.

[0143] In one embodiment, L in Formula 1 11 may be selected from:

[0144] a benzene group, a fluorene group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, -C(Q 1 )(Q 2 )- and -Si(Q 1 )(Q 2 )-; and

[0145] each of which is substituted by at least one selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q33 ) at least one of the substituted phenyl group, fluorene group, carbazole group, dibenzofuran group and dibenzothiophene group.

[0146] For example, a11 in formula 1 can be 1 or 2.

[0147] For example, A in formula 1 11 may be selected from:

[0148] phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group and dinaphthothiophenyl group;

[0149] each independently selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group, dinaphthothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) at least one of the substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, anthryl group, fluoranthenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, benzofluorenyl group, benzocarbazolyl group, benzonaphthofuranyl group, benzonaphthothiophenyl group, dibenzofluorenyl group, dibenzocarbazolyl group, dinaphthofuranyl group and dinaphthothiophenyl group; and

[0150] each independently selected from each independently selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzophenanthryl group, A group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[h]fluorenyl group, a benzo[h]carbazolyl group, a benzo[def]naphtho[2,1-b]furanyl group, a benzo[def]naphtho[2,1-b]thiophenyl group, a dibenzo[def,p]chrysenyl group, a dibenzo[def,p]carbazolyl group, a dinaphtho[2,1-b:1',2'-d]furanyl group, a dinaphtho[2,1-b:1',2'-d]thiophenyl group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 )-substituted phenyl groups, biphenyl groups, terphenyl groups, naphthyl groups, phenanthryl groups, benzo[ghi]phenanthryl groups, A group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[h]fluorenyl group, a benzo[h]carbazolyl group, a benzo[def]naphtho[2,1-b]furanyl group, a benzo[def]naphtho[2,1-b]thiophenyl group, a dibenzo[def,p]chrysenyl group, a dibenzo[def,p]carbazolyl group, a dinaphtho[2,1-b:1',2'-d]furanyl group and a dinaphtho[2,1-b:1',2'-d]thiophenyl group-substituted phenyl groups, biphenyl groups, terphenyl groups, naphthyl groups, phenanthryl groups, benzo[ghi]phenanthryl groups, A group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[h]fluorenyl group, a benzo[h]carbazolyl group, a benzo[def]naphtho[2,1-b]furanyl group, a benzo[def]naphtho[2,1-b]thiophenyl group, a dibenzo[def,p]chrysenyl group, a dibenzo[def,p]carbazolyl group, a dinaphtho[2,1-b:1',2'-d]furanyl group and a dinaphtho[2,1-b:1',2'-d]thiophenyl group.

[0151] In one embodiment, A in Formula 1 11 may be selected from:

[0152] Phenyl groups, biphenyl groups, terphenyl groups, fluorenyl groups, carbazolyl groups, dibenzofuranyl groups and dibenzothiophenyl groups;

[0153] Each independently selected from deuterium, C 1 -C 20 alkyl groups, phenyl groups, biphenyl groups, terphenyl groups, fluorenyl groups, carbazolyl groups, dibenzofuranyl groups, dibenzothiophenyl groups, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33at least one substituted phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, and dibenzothiophenyl group in ()); and

[0154] each independently selected from deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, -C(Q 21 )(Q 22 )(Q 23 ) and -Si(Q 21 )(Q 22 )(Q 23 ) at least one substituted phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, and dibenzothiophenyl group among at least one substituted phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, and dibenzothiophenyl group.

[0155] In one or more embodiments, A in Formula 1 11 can be represented by one of the following Formulas 8-1 to 8-5:

[0156]

[0157] In Formulas 8-1 to 8-5,

[0158] X 81 can be selected from O, S, N(R 89 ) and C(R 89 )(R 90 ),

[0159] R 81 to R 90 can each independently be selected from hydrogen, deuterium, C 1 -C 20 alkyl group, phenyl group, biphenyl group, terphenyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, and dibenzothiophenyl group, and

[0160] * represents the bonding site to the adjacent atom.

[0161] In one embodiment, the first compound can be represented by one of the following Formulas 1-1 to 1-5:

[0162]

[0163] In Formulas 1-1 to 1-5,

[0164] L 11 , a11, A 11 and R 11 to R 19 can each be understood by referring to the corresponding description provided for Formula 1.

[0165] For example, A in Formulas 1-1 to 1-5 11 can be represented by one of the following Formulas 8-1 to 8-5:

[0166]

[0167] In Formulas 8-1 to 8-5,

[0168] X 81 can be selected from O, S, N(R 89 ), and C(R 89 )(R 90 ),

[0169] R 81 to R 90 can each independently be selected from hydrogen, deuterium, C 1 -C 20 alkyl groups, phenyl groups, biphenyl groups, terphenyl groups, fluorenyl groups, carbazolyl groups, dibenzofuranyl groups, and dibenzothiophenyl groups, and

[0170] * represents the bonding site to the adjacent atom.

[0171] For example, L in Formula 10 101 to L 103 can each independently be selected from:

[0172] benzene groups, naphthalene groups, phenalene groups, anthracene groups, fluoranthene groups, benzo[a]pyrene groups, phenanthrene groups, pyrene groups, groups, perylene groups, pyridine groups, pyrimidine groups, pyrazine groups, pyridazine groups, triazine groups, quinoline groups, isoquinoline groups, benzoquinoline groups, benzoisoquinoline groups, phthalazine groups, naphthyridine groups, quinoxaline groups, benzoquinoxaline groups, quinazoline groups, benzoquinazoline groups, fluorenyl groups, carbazolyl groups, dibenzofuranyl groups, and dibenzothiophenyl groups; and

[0173] each independently substituted with deuterium, -F, cyano groups, C 1 -C 20 alkyl groups, phenyl groups, biphenyl groups, terphenyl groups, naphthyl groups, phenanthryl groups, benzo[a]phenanthryl groups, At least one of a phenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[h]fluorenyl group, a benzo[h]carbazolyl group, a benzo[h]naphtho[2,3-b]furanyl group, a benzo[h]naphtho[2,3-b]thiophenyl group, a dibenzo[h,i]fluorenyl group, a dibenzo[h,i]carbazolyl group, a dinaphtho[2,3-b:2',3'-f]furanyl group, a dinaphtho[2,3-b:2',3'-f]thiophenyl group, an indeno[1,2-b]fluorenyl group, an indeno[1,2-b]carbazolyl group, a benzo[f]benzofurano[2,3-b]fluorenyl group, a benzo[f]benzothieno[2,3-b]fluorenyl group, an indeno[1,2-b]carbazolyl group, an indeno[1,2-b]carbazolyl group, a benzo[f]benzofurano[2,3-b]carbazolyl group, a benzo[f]benzothieno[2,3-b]carbazolyl group, an indeno[1,2-b]dibenzofuranyl group, an indeno[1,2-b]dibenzofuranyl group, a benzo[f]benzofurano[2,3-b]dibenzofuranyl group, a benzo[f]benzothieno[2,3-b]dibenzofuranyl group, an indeno[1,2-b]dibenzothiophenyl group, an indeno[1,2-b]dibenzothiophenyl group, a benzo[f]benzofurano[2,3-b]dibenzothiophenyl group, a benzo[f]benzothieno[2,3-b]dibenzothiophenyl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuranyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group, substituted phenyl group, naphthyl group, phenanthryl group, anthracenyl group, fluoranthenyl group, benzo[a]phenanthryl group, phenanthryl group, pyrenyl group, a group, a perylenyl group, a pyridyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a benzoisoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a benzoquinoxalinyl group, a quinazolinyl group, a benzoquinazolinyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group.

[0174] For example, a101 to a103 in Formula 10 can each independently be 0 or 1.

[0175] For example, R in Formula 10 101 to R 103 can each independently be selected from:

[0176] each unsubstituted or substituted with a group selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, C 1 -C 10 alkyl group, C 1 -C 10Alkoxy group, phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthryl group, phenanthryl group, pyridyl group, pyrazinyl group, pyridazinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, benzoisoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzoquinoxalinyl group, benzoquinazolinyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, azafluorenyl group, azacarbazolyl group, azadibenzofuranyl group, azadibenzothiophenyl group, diazafluorenyl group, diazacarbazolyl group, diazadibenzofuranyl group, diazadibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 )、-N(Q 31 )(Q 32 )、-P(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)(Q 31 )、-S(=O) 2 (Q 31 )、-P(=O)(Q 31 )(Q 32 ) and -P(=S)(Q 31 )(Q 32 ) in which at least one of the substituted phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthryl group, phenanthryl group, pyridyl group, pyrazinyl group, pyridazinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, benzoisoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzoquinoxalinyl group, benzoquinazolinyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, azafluorenyl group, azacarbazolyl group, azadibenzofuranyl group, azadibenzothiophenyl group, diazafluorenyl group, diazacarbazolyl group, diazadibenzofuranyl group and diazadibenzothiophenyl group; and

[0177] -C(Q 1 )(Q 2 )(Q 3 )、-Si(Q 1 )(Q 2 )(Q 3)、 -B(Q 1 )(Q 2 )、 -N(Q 1 )(Q 2 )、 -P(Q 1 )(Q 2 )、 -C(=O)(Q 1 )、 -S(=O)(Q 1 )、 -S(=O) 2 (Q 1 )、 -P(=O)(Q 1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ),

[0178] wherein Q 1 to Q 3 and Q 31 to Q 33 can each independently be selected from phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthryl group, phenanthryl group, pyridyl group, pyrazinyl group, pyridazinyl group, pyrimidinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, benzoisoquinolinyl group, phthalazinyl group, naphthyridinyl group, quinoxalinyl group, quinazolinyl group, benzoquinoxalinyl group, benzoquinazolinyl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, azafuorenyl group, azacarbazolyl group, azadibenzofuranyl group, azadibenzothiophenyl group, diazafluorenyl group, diazacarbazolyl group, diazadibenzofuranyl group and diazadibenzothiophenyl group.

[0179] In one embodiment, R 101 to R 103 in Formula 10 can each independently be selected from:

[0180] each unsubstituted or substituted phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthryl group, phenanthryl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group by at least one selected from deuterium, C 1 -C 10 alkyl group, phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthryl group, phenanthryl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ); and

[0181] -C(Q 1 )(Q 2 )(Q 3 ) and -Si(Q 1 )(Q 2 )(Q 3 ), and

[0182] Q 1 to Q 3 and Q 31 to Q 33 can each independently be selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthryl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group.

[0183] In one embodiment, at least one selected from R 101 to R 103 in Formula 10 can be selected from the group represented by Formula 11-1, the group represented by Formula 11-2, -C(Q 1 )(Q 2 )(Q 3 ) and -Si(Q 1 )(Q 2 )(Q 3 ) :

[0184]

[0185] In Formula 11-1 and Formula 11-2,

[0186] Y 111 can be selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthryl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ), and

[0187] R 111 to R 114 can each independently be selected from hydrogen, deuterium, C 1 -C 10 alkyl group, a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthryl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33) and -Si(Q 31 )(Q 32 )(Q 33 ),

[0188] Q 1 to Q 3 and Q 31 to Q 33 can each independently be selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, and

[0189] * represents the attachment site to an adjacent atom.

[0190] For example, M in Formula 3 31 can be selected from platinum (Pt), palladium (Pd), copper (Cu), silver (Ag), gold (Au), rhodium (Rh), iridium (Ir), ruthenium (Ru), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb), and thulium (Tm).

[0191] In one embodiment, M in Formula 3 31 can be selected from Pt and Ir.

[0192] For example, A in Formulas 3A to 3D 31 to A 34 can each independently be i) a first ring, ii) a second ring, iii) a fused ring in which two or more of the first rings are fused to each other, iv) a fused ring in which two or more of the second rings are fused to each other, and / or v) a fused ring in which one or more of the first rings and one or more of the second rings are fused to each other,

[0193] wherein the first ring can be selected from a cyclopentyl group, a cyclopentenyl group, a cyclopentadienyl group, a furanyl group, a thiophenyl group, a pyrrolyl group, a borolyl group, a phospholyl group, a silolyl group, a germolyl group, a selenophenyl group, an oxazolyl group, a dihydrooxazolyl group, an isoxazolyl group, a dihydroisoxazolyl group, an oxadiazolyl group, a dihydrooxadiazolyl group, an isoxadiazolyl group, a dihydroisoxadiazolyl group, an oxatriazolyl group, a dihydrooxatriazolyl group, an isoxatriazolyl group, a dihydroisoxatriazolyl group, a thiazolyl group, a dihydrothiazolyl group, an isothiazolyl group, a dihydroisothiazolyl group, a thiadiazolyl group, a dihydrothiadiazolyl group, an isothiadiazolyl group, a dihydroisothiadiazolyl group, a thiatriazolyl group, a dihydrothiatriazolyl group, an isothiatriazolyl group, a dihydroisothiatriazolyl group, a pyrazolyl group, a dihydropyrazolyl group, an imidazolyl group, a dihydroimidazolyl group, a triazolyl group, a dihydrotriazolyl group, a tetrazolyl group, a dihydrotetrazolyl group, an azasilolyl group, a diazasilolyl group, and a triazasilolyl group, and

[0194] The second ring may be selected from a cyclohexyl group, a cyclohexenyl group, a cyclohexadienyl group, an adamantyl group, a norbornyl group, a norbornenyl group, a phenyl group, a pyridyl group, a dihydropyridyl group, a tetrahydropyridyl group, a pyrimidinyl group, a dihydropyrimidinyl group, a tetrahydropyrimidinyl group, a pyrazinyl group, a dihydropyrazinyl group, a tetrahydropyrazinyl group, a pyridazinyl group, a dihydropyridazinyl group, a tetrahydropyridazinyl group, and a triazinyl group.

[0195] In one embodiment, A in Formulas 3A to 3D 31 to A 34 may each independently be selected from a phenyl group, a naphthyl group, an anthryl group, a phenanthryl group, a benzophenanthryl group, a pyrenyl group, a group, a furyl group, a thienyl group, a silolyl group, an indenyl group, a fluorenyl group, a benzofuranyl group, a dibenzofuranyl group, a benzothienyl group, a dibenzothienyl group, a benzosilolyl group, a dibenzosilolyl group, an indolyl group, a carbazolyl group, an indeno[1,2-b]pyridinyl group, an indolo[1,2-b]pyridinyl group, a benzofuro[2,3-b]pyridinyl group, a benzothieno[2,3-b]pyridinyl group, a benzosilolo[2,3-b]pyridinyl group, an indeno[1,2-b]pyrimidinyl group, an indolo[1,2-b]pyrimidinyl group, a benzofuro[2,3-b]pyrimidinyl group, a benzothieno[2,3-b]pyrimidinyl group, a benzosilolo[2,3-b]pyrimidinyl group, a pyridyl group, a pyrimidinyl group, a pyrazinyl group, a pyridazinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phthalazinyl group, a phenanthrolinyl group, a pyrrolyl group, a pyrazolyl group, an imidazolyl group, a dihydroimidazolyl group, a triazolyl group, a dihydrotriazolyl group, an oxazolyl group, a dihydrooxazolyl group, an isoxazolyl group, a thiazolyl group, a dihydrothiazolyl group, an isothiazolyl group, an oxadiazolyl group, a dihydrooxadiazolyl group, a thiadiazolyl group, a dihydrothiadiazolyl group, a benzopyrazolyl group, a benzimidazolyl group, a dihydrobenzimidazolyl group, an imidazo[1,2-b]pyridinyl group, an imidazo[1,2-b]pyrimidinyl group, an imidazo[1,2-b]pyrazinyl group, a benzoxazolyl group, a dihydrobenzoxazolyl group, a benzothiazolyl group, a dihydrobenzothiazolyl group, a benzoxadiazolyl group, a dihydrobenzoxadiazolyl group, a benzothiadiazolyl group, and a dihydrobenzothiadiazolyl group.

[0196] For example, T in Formulas 3A to 3D 31 to T 34 may each independently be selected from a single bond, a double bond, *-O-*', *-S-*', *-C(R 35 )(R 36 )-*', and *-N(R 35 )-*'.

[0197] For example, Y in Formulas 3A to 3D 31 to Y 34 may each independently be selected from a single bond, *-O-*', and *-S-*'.

[0198] For example, R in Formulas 3A to 3D31 to R 38 may each independently be selected from:

[0199] hydrogen, deuterium, -F, -Cl, -Br, -I, a cyano group, C 1 -C 20 an alkyl group and C 1 -C 20 an alkoxy group;

[0200] a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, a fluorenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group and a diazadibenzothiophenyl group; and

[0201] each substituted by at least one selected from deuterium, -F, -Cl, -Br, -I, a cyano group, C 1 -C 20 an alkyl group, C 1 -C 20 an alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, a fluorenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzofluorenyl group, a benzocarbazolyl group, a benzonaphthofuranyl group, a benzonaphthothiophenyl group, a dibenzofluorenyl group, a dibenzocarbazolyl group, a dinaphthofuranyl group, a dinaphthothiophenyl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group and a diazadibenzothiophenyl group of a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, Groups such as a base group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[h]fluorenyl group, a benzo[c]carbazolyl group, a benzo[def]naphtho[2,1-b]furan-2-yl group, a benzo[def]naphtho[2,1-b]thiophen-2-yl group, a dibenzo[def]fluorenyl group, a dibenzo[c,g]carbazolyl group, a dinaphtho[2,3-b:2',3'-f]furan-2-yl group, a dinaphtho[2,3-b:2',3'-f]thiophen-2-yl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group; and

[0202] -B(Q 1 )(Q 2 ) and -N(Q 1 )(Q 2 ), and

[0203] Q 1 and Q 2 can each independently be selected from:

[0204] Hydrogen, deuterium, and C 1 -C 20 alkyl groups;

[0205] Phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzo[a]phenanthryl group, Groups such as a base group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[h]fluorenyl group, a benzo[c]carbazolyl group, a benzo[def]naphtho[2,1-b]furan-2-yl group, a benzo[def]naphtho[2,1-b]thiophen-2-yl group, a dibenzo[def]fluorenyl group, a dibenzo[c,g]carbazolyl group, a dinaphtho[2,3-b:2',3'-f]furan-2-yl group, a dinaphtho[2,3-b:2',3'-f]thiophen-2-yl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuorenyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluorenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group, and a diazadibenzothiophenyl group; and

[0206] Each independently selected from deuterium, C 1 -C 20 alkyl groups, phenyl group, biphenyl group, terphenyl group, naphthyl group, phenanthryl group, benzo[a]phenanthryl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzo[ghi]phenanthryl group, substituted by at least one selected from the group consisting of a radical group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[b]fluoranthenyl group, a benzo[b]carbazolyl group, a benzo[def]naphtho[2,1-b]furanyl group, a benzo[def]naphtho[2,1-b]thiophenyl group, a dibenzo[b,k]fluoranthenyl group, a dibenzo[b,k]carbazolyl group, a naphtho[2,3-b]furanyl group, a naphtho[2,3-b]thiophenyl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuranyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluoranthenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group and a diazadibenzothiophenyl group a radical group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, a benzo[b]fluoranthenyl group, a benzo[b]carbazolyl group, a benzo[def]naphtho[2,1-b]furanyl group, a benzo[def]naphtho[2,1-b]thiophenyl group, a dibenzo[b,k]fluoranthenyl group, a dibenzo[b,k]carbazolyl group, a naphtho[2,3-b]furanyl group, a naphtho[2,3-b]thiophenyl group, a pyridyl group, a pyrazinyl group, a pyridazinyl group, a pyrimidinyl group, a triazinyl group, a quinolinyl group, an isoquinolinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, an azafuranyl group, an azacarbazolyl group, an azadibenzofuranyl group, an azadibenzothiophenyl group, a diazafluoranthenyl group, a diazacarbazolyl group, a diazadibenzofuranyl group and a diazadibenzothiophenyl group

[0207] In one embodiment, R in Formulas 3A to 3D 31 to R 38 may each independently be selected from:

[0208] hydrogen, deuterium, -F, -Cl, -Br, -I, a cyano group, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a methoxy group, an ethoxy group, a propoxy group and a butoxy group;

[0209] a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzo[ghi]phenanthryl group, a radical group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group and a dibenzothiophenyl group; and

[0210] Each independently selected from deuterium, -F, -Cl, -Br, -I, a cyano group, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a methoxy group, an ethoxy group, a propoxy group, a butoxy group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, substituted by at least one selected from a fluorenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and

[0211] -B(Q 1 )(Q 2 ) and -N(Q 1 )(Q 2 ), and

[0212] Q 1 and Q 2 can each independently be selected from: hydrogen, deuterium, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, and a tert-butyl group;

[0213] a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, substituted by at least one selected from a fluorenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group; and

[0214] each independently selected from deuterium, a methyl group, an ethyl group, a n-propyl group, an isopropyl group, a n-butyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, substituted by at least one selected from a fluorenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group of a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a phenanthryl group, a benzophenanthryl group, substituted by at least one selected from a fluorenyl group, a fluoranthenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group.

[0215] In one embodiment, the third compound can be represented by one selected from the following Formula 3-1 and Formula 3-2:

[0216]

[0217] In Formulas 3-1 and 3-2,

[0218] X 31 to X 40 may each independently be selected from N and C, and

[0219] the remaining components may each be understood by reference to their respective descriptions provided herein.

[0220] In Formulas 3-1 and 3-2, X 31 and X 32 may each independently be members of Ring A 31 and X 33 to X 40 may also be understood by reference to the descriptions provided for Formulas 3-1 and 3-2, X 31 and X 32 provided.

[0221] For example, X 41 in Formula 4 may be selected from N and B.

[0222] For example, Y 41 to Y 43 in Formula 4 may each independently be selected from O, S, N(R 45 ) and B(R 45 ).

[0223] For example, A 41 to A 43 in Formula 4 may each independently be selected from a benzene group, a naphthalene group, a phenanthrene group, an anthracene group, a benzo[a]phenanthrene group, a pyrene group, a group, a pyridine group, a pyrazine group, a pyrimidine group, a triazine group, a quinoline group, an isoquinoline group, a benzoquinoline group, a benzoisoquinoline group, a 2,6-naphthyridine group, a 1,8-naphthyridine group, a 1,5-naphthyridine group, a 1,6-naphthyridine group, a 1,7-naphthyridine group, a 2,7-naphthyridine group, a quinoxaline group, a quinazoline group, a phenanthridine group, a phenanthroline group, a benzofuran group, a benzothiophene group, an indene group, an indole group, a furanopyridine group, a thiophenopyridine group, a cyclopentenopyridine group, a pyrrolopyridine group, a dibenzofuran group, a dibenzothiophene group, a fluorene group, a carbazole group, a benzonaphthofuran group, a benzonaphthothiophene group, a benzofluorene group, a benzocarbazole group, a dinaphthofuran group, a dinaphthothiophene group, a dibenzofluorene group, a dibenzocarbazole group, a benzoxazole group, a benzothiazole group, a benzimidazole group, a naphthofuran, a naphthothiophene, a spiro-bifluorene group and a spiro-fluorene-indene group; and

[0224] a group represented by the following Formula 4A:

[0225] Formula 4A

[0226]

[0227] In Formula 4A,

[0228] X 42 can be understood by referring to the description provided for X in Formula 4 41 as provided.

[0229] Y 44 to Y 46 can each be understood by referring to the description provided for Y in Formula 4 41 to Y 43 as provided.

[0230] k44 can be understood by referring to the description provided for k41 in Formula 4

[0231] A 44 to A 46 can each be understood by referring to the description provided for A in Formula 4 41 to A 43 as provided.

[0232] R 47 to R 49 can each be understood by referring to the description provided for R in Formula 4 41 as provided, and

[0233] b47 to b49 can each be understood by referring to the description provided for b41 in Formula 4

[0234] For example, R in Formula 4 41 to R 46 can be understood by referring to the description provided for R 31 as provided.

[0235] In one embodiment, the fourth compound can be represented by the following Formula 4-1:

[0236] Formula 4-1

[0237]

[0238] In Formula 4-1,

[0239] each component can be understood by referring to its corresponding description provided herein.

[0240] In one or more embodiments, the fourth compound can be represented by the following Formula 4-11 or Formula 4-12:

[0241]

[0242] In Formulas 4-11 and 4-12,

[0243] R 41a to R 41d 、R 42a to R 42d 、R 43a to R 43c 、R 44a to R 44d 、R 45a 、R 45b and R 46a to R 46c can each be understood by reference to the description provided for R in Formula 4, and 41 the remaining components can each be understood by reference to their respective descriptions provided herein.

[0244] In one embodiment, the first compound can be selected from the compounds of Group I,

[0245] the second compound can be selected from the compounds of Group II;

[0246] the third compound can be selected from the compounds of Group III-I and Group III-II, and

[0247] the fourth compound can be selected from the compounds of Group IV:

[0248] Group I

[0249] Group I

[0250]

[0251] Group II

[0252]

[0253]

[0254] Group III-I

[0255]

[0256]

[0257] Group III-II

[0258]

[0259]

[0260] Group IV

[0261]

[0262]

[0263] where Me represents methyl, iso-Pr represents an isopropyl group, tert-Bu represents a tert-butyl group, and NMe 2 represents a dimethylamino group.

[0264] The first compound, the second compound, and the third compound may substantially not emit light (e.g., the third compound is not provided to emit light).

[0265] In some embodiments, the third compound does not emit light, but the third compound satisfies condition 1-1 and condition 1-2. Thus, intersystem crossing (ISC) occurs actively, resulting in the migration of triplet excitons generated from the first compound and the second compound to the fourth compound.

[0266] Therefore, by transferring singlet excitons and triplet excitons generated in the emission layer to the fourth compound, an organic light-emitting device with improved efficiency can be obtained. In addition, since an organic light-emitting device with significantly reduced energy loss is obtained, the service life characteristics of the organic light-emitting device can be improved.

[0267] Furthermore, when excitons transition in the third compound and then in the fourth compound, degradation of the fourth compound due to the energy of the excitons can be suppressed (or reduced), thereby improving the service life characteristics.

[0268] The lowest excited triplet energy level of the third compound may be from about 2.5 eV to about 3.5 eV. Thus, the lowest excited triplet energy level of the third compound can be higher than the lowest excited singlet energy level of the fourth compound, such that the lowest excited triplet of the third compound can be well (appropriately) transferred to the lowest excited singlet energy level of the fourth compound.

[0269] The fourth compound emits light, and the fourth compound may be a delayed fluorescence emitter.

[0270] In one or more embodiments, the fourth compound may be a thermally activated delayed fluorescence (TADF) emitter.

[0271] The fourth compound can improve the luminescence efficiency by forming a dipole in the compound. In addition, since the fourth compound satisfies condition 2 or condition 3, the triplet state of the excitons can be transferred to the singlet state by reverse intersystem crossing (RISC) without significant loss, and thus, the luminescence efficiency can be improved.

[0272] Regarding the third compound and the fourth compound, T 1 (C3) 起始 -S 1 (C4) 起始 can be about 3.0 eV or less than 3.0 eV, and T 1 (C3)最大 -S 1 (C4) 最大 may be about 3.0 eV or less than 3.0 eV. In one or more embodiments, with respect to the third compound and the fourth compound, T 1 (C3) 起始 -S 1 (C4) 起始 may be from about 2.8 eV to about 3.0 eV, and T 1 (C3) 最大 -S 1 (C4) 最大 may be from about 2.8 eV to about 3.0 eV. In one or more embodiments, when such ranges are satisfied, the ratio of the luminescent component emitted from the fourth compound to the total luminescent component emitted from the emission layer is 80% or greater than 80%. The fourth compound may have a maximum emission wavelength of about 420 nm to about 490 nm, but the embodiments of the present disclosure are not limited thereto.

[0273] In some embodiments, the fourth compound in the emission layer may emit light of blue delayed fluorescence by receiving energy from the formed excitons without directly participating in the formation of excitons.

[0274] The fourth compound may satisfy condition A:

[0275] Condition A

[0276] ΔE ST (C4) ≤ 0.3 eV.

[0277] In condition A,

[0278] ΔE ST (C4) is the difference between the lowest excited singlet state energy level (S 1 (C4)) and the lowest excited triplet state energy level (T 1 (C4)) of the fourth compound.

[0279] Herein, S 1 (C4) and T 1 (C4) may each be evaluated using the density functional theory (DFT) method of the Gaussian program with structural optimization at the B3LYP / 6-31G(d,p) level.

[0280] When condition A is satisfied, the RISC efficiency can be sufficiently (appropriately) high even at room temperature.

[0281] The T 1 level of the fourth compound is relatively higher than the T 1 level of a comparable fluorescent dopant, which allows for smooth RISC.

[0282] In the case of comparable fluorescent dopants (e.g., DCJTB), the T of the dopant 1 level is substantially lower than the T of the third compound 1 level, and thus, the excitons generated by the third compound at the T 1 level may jump to the T of the fluorescent dopant 1 level, and after the jump, may not participate in luminescence and be quenched. In addition, due to the low T of the fluorescent dopant 1 , the triplet excitons generated in the first compound and the second compound may be quenched without participating in light emission, while transferring to the T 1 of the fluorescent dopant, without transferring to the T 1 of the third compound. Therefore, it may be inappropriate to replace the fourth compound with a comparable fluorescent dopant.

[0283] Because the fourth compound of the present embodiment has a sufficiently (appropriately) high RISC efficiency even at room temperature, even when the excitons at the T 1 level of the third compound move to the T 1 level of the fourth compound, the excitons at the T 1 level of the fourth compound undergo reverse intersystem crossing to the S 1 level of the fourth compound, and then emit in the form of fluorescence. In other words, the excitons are not quenched. Therefore, the exciton quenching probability can be greatly reduced, and thus, the luminescence efficiency can be improved. In addition, when the excitons jump in the third compound and then in the fourth compound, the degradation of the fourth compound due to the energy of the excitons can be suppressed or reduced, thereby improving the service life characteristics.

[0284] When electrons are not effectively injected from the electron transport region into the emission layer, charges accumulate at the interface between the emission layer and the electron transport region, thereby deteriorating the interface. Similarly, when holes are not effectively injected from the hole transport region into the emission layer, charges accumulate at the interface between the emission layer and the hole transport region, thereby deteriorating the interface. Therefore, the service life of the organic light-emitting device is reduced.

[0285] Because the second compound is a compound essentially containing an electron transport part, the second compound can be used to adjust the electron transport characteristics of the organic light-emitting device. Because the first compound is a compound not containing an electron transport part, the first compound can be used to adjust the hole transport characteristics of the organic light-emitting device. In this way, the charge balance in the emission layer of the organic light-emitting device can be optimized (or improved).

[0286] Based on the total weight of the emission layer, the amount of the first compound in the emission layer can be about 10 wt% to about 90 wt%.

[0287] Based on the total weight of the emission layer, the amount of the second compound in the emission layer can be from about 10 wt% to about 90 wt%.

[0288] The amount of the third compound in the emission layer can be greater than or equal to the amount of the fourth compound.

[0289] Based on the total weight of the emission layer, the amount of the fourth compound in the emission layer can be from about 0.25 wt% to about 5 wt%.

[0290] Based on the sum of the amounts of the first compound and the second compound in 100 parts by weight, the amount of the fourth compound can be from about 0.01 part by weight to about 20 parts by weight.

[0291] When the amounts of the first compound, the second compound, and the third compound are within any of these ranges, an organic light-emitting device having both improved efficiency and improved service life can be provided.

[0292] In one or more embodiments, the emission layer can be composed of the first compound, the second compound, the third compound, and the fourth compound, but the embodiments of the present disclosure are not limited thereto.

[0293] In one embodiment, the first electrode can be an anode, the second electrode can be a cathode, and the organic layer can further include a hole transport region between the first electrode and the emission layer, and / or an electron transport region between the emission layer and the second electrode, wherein the hole transport region can include a hole injection layer, a hole transport layer, an emission assisting layer, an electron blocking layer, or any combination thereof, and the electron transport region can include a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof, but the embodiments of the present disclosure are not limited thereto.

[0294] For example, the hole blocking layer can contain a hole blocking material.

[0295] The hole blocking material can be the same as or different from the second compound. In some embodiments, the hole blocking material can be different from the second compound.

[0296] For example, the first compound, the second compound, and the hole blocking material can each satisfy the following Condition 4 and Condition 5:

[0297] Condition 4

[0298] T 1 (HB)≥T 1 (C1)

[0299] Condition 5

[0300] T 1 (HB)≥T 1(C2).

[0301] In Conditions 4 and 5,

[0302] T 1 (C1) is the lowest excited triplet state energy level of the first compound;

[0303] T 1 (C2) is the lowest excited triplet state energy level of the second compound;

[0304] T 1 (HB) is the lowest excited triplet state energy level of the hole blocking material;

[0305] T 1 (C1), T 1 (C2) and T 1 (HB) each is an initial value and a measured value. The method for measuring T 1 (C1), T 1 (C2) and T 1 (HB) can be understood by referring to the description of T 1 (C3) 起始 .

[0306] When Conditions 4 and 5 are satisfied, the transfer of triplet excitons generated in the first compound and the second compound from the emission layer to the electron transport layer can be prevented or reduced.

[0307] In some embodiments, the first compound, the second compound, and the hole blocking material may satisfy Conditions 4-1 and 5-1:

[0308] Condition 4-1

[0309] 0.3 eV > T 1 (HB) - T 1 (C1) ≥ 0 eV

[0310] Condition 5-1

[0311] 0.3 eV > T 1 (HB) - T 1 (C2) ≥ 0 eV.

[0312] The hole blocking material can be represented by Formula 10. Formula 10 can be understood by referring to its corresponding description provided herein.

[0313] In one embodiment, the hole blocking material may be selected from the compounds of Group V:

[0314] Group V

[0315]

[0316]

[0317] Figure 1 Description of

[0318] Figure 1 is a schematic view of an organic light emitting device 10 according to an embodiment. The organic light emitting device 10 includes a first electrode 110, an organic layer 150, and a second electrode 190.

[0319] Hereinafter, the structure of the organic light emitting device 10 according to the embodiment and a method of manufacturing the organic light emitting device 10 will be described in conjunction with Figure 1 Description of the structure of the organic light emitting device 10 according to the embodiment and a method of manufacturing the organic light emitting device 10.

[0320] First electrode 110

[0321] In Figure 1 , a substrate may be additionally positioned below the first electrode 110 or above the second electrode 190. The substrate may be a glass substrate and / or a plastic substrate each having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and / or water resistance.

[0322] The first electrode 110 may be formed by depositing or sputtering a material for forming the first electrode 110 on the 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.

[0323] 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, the 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 embodiments, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, the material for forming the first electrode 110 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.

[0324] 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.

[0325] Organic layer 150

[0326] The organic layer 150 is located on the first electrode 110. The organic layer 150 may include an emission layer.

[0327] The organic layer 150 may further include a hole transport region between the first electrode 110 and the emission layer, and an electron transport region between the emission layer and the second electrode 190.

[0328] The hole transport region in the organic layer 150

[0329] 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.

[0330] The hole transport region may include at least one layer selected from a hole injection layer, a hole transport layer, an emission assist layer, and an electron blocking layer.

[0331] For example, the hole transport region may have a single-layer structure including a single layer containing a plurality of different materials, or a multi-layer structure having a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission assist layer structure, a hole injection layer / emission assist layer structure, a hole transport layer / emission assist layer structure, or a hole injection layer / hole transport layer / electron blocking layer structure, where for each structure, the constituent layers are stacked in this specified order from the first electrode 110 in sequence, but the structure of the hole transport region is not limited thereto.

[0332] The hole transport region may contain at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), a compound represented by the following formula 201, and a compound represented by the following formula 202:

[0333]

[0334] Formula 201

[0335]

[0336] Formula 202

[0337]

[0338] In formula 201 and formula 202,

[0339] L201 to L 204 may each independently be selected from substituted or unsubstituted C 3 -C 10 subcycloalkyl group, substituted or unsubstituted C 1 -C 10 subheterocycloalkyl group, substituted or unsubstituted C 3 -C 10 subcycloalkenyl group, substituted or unsubstituted C 1 -C 10 subheterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 subaryl group, substituted or unsubstituted C 1 -C 60 subheteroaryl group, substituted or unsubstituted divalent non-aromatic fused polycyclic group and substituted or unsubstituted divalent non-aromatic fused heteropolycyclic group,

[0340] L 205 may be selected from *-O-*', *-S-*', *-N(Q 201 )-*', substituted or unsubstituted C 1 -C 20 subalkyl group, substituted or unsubstituted C 2 -C 20 subalkenyl group, substituted or unsubstituted C 3 -C 10 subcycloalkyl group, substituted or unsubstituted C 1 -C 10 subheterocycloalkyl group, substituted or unsubstituted C 3 -C 10 subcycloalkenyl group, substituted or unsubstituted C 1 -C 10 subheterocycloalkenyl group, substituted or unsubstituted C 6 -C 60 subaryl group, substituted or unsubstituted C 1 -C 60 subheteroaryl group, substituted or unsubstituted divalent non-aromatic fused polycyclic group and substituted or unsubstituted divalent non-aromatic fused heteropolycyclic group,

[0341] xa1 to xa4 may each independently be an integer from 0 to 3,

[0342] xa5 may be an integer from 1 to 10, and

[0343] R 201 to R 204 and Q 201 may each independently be selected from substituted or unsubstituted C 3 -C10 Cycloalkyl group, substituted or unsubstituted C 1 -C 10 Heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 Cycloalkenyl group, 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 group, 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 and substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group.

[0344] In one embodiment, in Formula 202, R 201 and R 202 may optionally be connected to each other via a single bond, a dimethyl-methylene group and / or a diphenyl-methylene group, and R 203 and R 204 may optionally be connected to each other via a single bond, a dimethyl-methylene group and / or a diphenyl-methylene group.

[0345] In one embodiment, in Formulas 201 and 202,

[0346] L 201 to L 205 may each independently be selected from:

[0347] Phenylene group, pentaphenylene group, indenylene group, naphthylene group, azulylene group, heptaphenylene group, indacenylene group, acenaphthylene group, fluorenylene group, spiro-bifluorenylene group, benzo[a]fluorenylene group, dibenzo[a,h]fluorenylene group, phenalenylene group, phenanthrylene group, anthrylene group, fluoranthenylene group, benzo[a]phenanthrylene group, pyrenylene group, ylene group, terphenylene group, piceneylene group, perylenylene group, quaterphenylene group, hexacenylene group, pentacenylene group, rubicenylene group, coronylene group, ovaleneylene group, thienylene group, furylene group, carbazolylene group, indolylene group, isoindolylene group, benzofuranylene group, benzothienylene group, dibenzofuranylene group, dibenzothienylene group, benzocarbazolylene group, dibenzocarbazolylene group, dibenzosilolylene group and pyridinylene group; and

[0348] each independently selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono 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, a phenyl group substituted with C 1 -C 10 alkyl group, a phenyl group substituted with -F, pentacenyl group, indenyl group, naphthyl group, azulene group, heptacenyl group, indacenyl group, acenaphthyl group, fluorene group, spiro - bifluorene group, benzofluorene group, dibenzofluorene group, phenalenyl group, phenanthryl group, anthracenyl group, fluoranthenyl group, benzo[a]phenanthryl group, pyrenyl group, yl group, tetracenyl group, picenyl group, perylenyl group, pentaphenyl group, hexaphenyl group, pentacenyl group, rubicenyl group, coronenyl group, ovalene group, thienyl group, furyl group, carbazolyl group, indolyl group, isoindolyl group, benzofuranyl group, benzothienyl group, dibenzofuranyl group, dibenzothienyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzosilolyl group, pyridyl group, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ), and a phenylene group, a pentacenylene group, an indenylene group, a naphthylene group, an azuleneylene group, a heptacenylene group, an indacenylene group, an acenaphthylene group, a fluorenylene group, a spiro - bifluorenylene group, a benzofluorenylene group, a dibenzofluorenylene group, a phenalenylene group, a phenanthrylene group, an anthrylene group, a fluoranthenylene group, a benzo[a]phenanthrylene group, a pyrenylene group, yl group, a tetracenylene group, a picenylene group, a perylenylene group, a pentaphenylene group, a hexaphenylene group, a pentacenylene group, a rubicenylene group, a coronenylene group, an ovalenylene group, a thienylene group, a furylene 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 dibenzosilolylene group and a pyridylene group, each of which is substituted with at least one of, and

[0349] Q 31 to Q 33 can each independently be selected from C1 -C 10 alkyl group, C 1 -C 10 alkoxy group, phenyl group, biphenyl group, terphenyl group, and naphthyl group.

[0350] In one or more embodiments, xa1 to xa4 can each independently be 0, 1, or 2.

[0351] In one or more embodiments, xa5 can be 1, 2, 3, or 4.

[0352] In one or more embodiments, R 201 to R 204 and Q 201 can each independently be selected from:

[0353] phenyl group, biphenyl group, terphenyl group, pentacenyl group, indenyl group, naphthyl group, azulene group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro - bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, benzo[a]phenanthrenyl group, pyrenyl group, group, tetracenyl group, picenyl group, perylenyl group, pentaphenyl group, hexaphenyl group, pentacenyl group, rubicenyl group, corannulenyl group, ovalene group, thiophenyl group, furyl group, carbazolyl group, indolyl group, isoindolyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzosilolyl group, and pyridyl group; and

[0354] each independently substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, 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, phenyl group substituted with C 1 -C 10 alkyl group, phenyl group substituted with -F, pentacenyl group, indenyl group, naphthyl group, azulene group, heptalenyl group, indacenyl group, acenaphthyl group, fluorenyl group, spiro - bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenalenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, benzo[a]phenanthrenyl group, pyrenyl group, A group, a tetraphenyl group, a picene group, a perylene group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a rubicene group, a coronene group, an ovalene group, a thienyl group, a furyl 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 dibenzosilolyl group, a pyridyl group, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ), and at least one of the substituted phenyl groups, biphenyl groups, terphenyl groups, pentacenyl groups, indenyl groups, naphthyl groups, azulene groups, heptacenyl groups, indacenyl groups, acenaphthyl groups, fluorenyl groups, spiro-bifluorenyl groups, benzofluorenyl groups, dibenzofluorenyl groups, phenalenyl groups, phenanthrenyl groups, anthracenyl groups, fluoranthenyl groups, benzophenanthrenyl groups, pyrenyl groups, A group, a tetraphenyl group, a picene group, a perylene group, a pentaphenyl group, a hexaphenyl group, a pentacene group, a rubicene group, a coronene group, an ovalene group, a thienyl group, a furyl 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 dibenzosilolyl group and a pyridyl group, and

[0355] Q 31 to Q 33 are the same as those described above.

[0356] In one or more embodiments, at least one of R 201 to R 203 selected from Formula 201 may each independently be selected from:

[0357] A fluorenyl group, a spiro-bifluorenyl group, a carbazolyl group, a dibenzofuranyl group and a dibenzothienyl group; and

[0358] Each is independently selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, C 1 -C 20 alkyl group, C 1 -C 20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a 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 fluorenyl group, a spiro-bifluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a dibenzothiophenyl group substituted with at least one of a dibenzothiophenyl group,

[0359] However, the embodiments of the present disclosure are not limited thereto.

[0360] In one or more embodiments, in Formula 202, i) R 201 and R 202 may be connected to each other via a single bond, and / or ii) R 203 and R 204 may be connected to each other via a single bond.

[0361] In one or more embodiments, R in Formula 202 201 to R 204 may each independently be selected from:

[0362] A carbazolyl group; and

[0363] Selected from deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazone group, C 1 -C 20 An alkyl group, C 1 -C 20 An alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a phenyl group substituted with a C 1 -C 10 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, and a carbazolyl group substituted with at least one of a dibenzothiophenyl group,

[0364] However, the embodiments of the present disclosure are not limited thereto.

[0365] The compound represented by Formula 201 may be represented by the following Formula 201A:

[0366] Formula 201A

[0367]

[0368] In one embodiment, the compound represented by Formula 201 may be represented by the following Formula 201A(1), but the embodiments of the present disclosure are not limited thereto:

[0369] Formula 201A(1)

[0370]

[0371] In one or more embodiments, the compound represented by Formula 201 can be represented by the following Formula 201A-1, but the embodiments of the present disclosure are not limited thereto:

[0372] Formula 201A-1

[0373]

[0374] In one embodiment, the compound represented by Formula 202 can be represented by the following Formula 202A:

[0375] Formula 202A

[0376]

[0377] In one or more embodiments, the compound represented by Formula 202 can be represented by the following Formula 202A-1:

[0378] Formula 202A-1

[0379]

[0380] In Formula 201A, Formula 201A(1), Formula 201A-1, Formula 202A, and Formula 202A-1,

[0381] L 201 to L 203 , xa1 to xa3, xa5, and R 202 to R 204 can each be understood by referring to their respective descriptions presented herein,

[0382] R 211 and R 212 can each be understood by referring to the description provided for R 203 , and

[0383] R 213 to R 217 can each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxy group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, a C 1 -C 20 alkyl group, a C 1 -C 20 alkoxy group, a cyclopentyl group, a cyclohexyl group, a cycloheptyl group, a cyclopentenyl group, a cyclohexenyl group, a phenyl group, a biphenyl group, a terphenyl group, a C 1 -C 10An alkyl group-substituted phenyl group, a phenyl group substituted with -F, a pentacenyl group, an indenyl group, a naphthyl group, a azulene group, a heptacenyl group, an indacenyl group, an acenaphthyl group, a fluorene group, a spiro-bifluorene group, a benzofluorene group, a dibenzofluorene group, a phenalenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a benzo[a]phenanthryl group, a pyrenyl group, a perylene group, a picene group, a pentaphenyl group, a hexaphenyl group, a quaterphenyl group, a rubicene group, a coronene group, an ovalene group, a thienyl group, a furyl 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 dibenzosilolyl group, and a pyridyl group.

[0384] The hole transport region may include at least one compound selected from Compounds HT1 to HT39 below, but embodiments of the present disclosure are not limited thereto:

[0385]

[0386]

[0387]

[0388] 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 of a hole injection layer and a hole transport layer, the thickness of the hole injection layer may be about to about For example, about to about and the thickness of the hole transport layer may be about to about For example, about to about When the thicknesses of the hole transport region, the hole injection layer, and the hole transport layer are within any of these ranges, satisfactory (or suitable) hole transport characteristics can be obtained without a significant increase in the driving voltage.

[0389] The emission assisting layer can increase the light emission efficiency by compensating for the optical resonance distance according to the wavelength of the light emitted from the emission layer, and the electron blocking layer can block or reduce the flow of electrons from the electron transport region. The emission assisting layer and the electron blocking layer may include materials as described above.

[0390] p-dopant

[0391] In addition to the materials described above, the hole transport region may further include a charge generation material for improving the conductive properties. The charge generation material may be uniformly or non-uniformly dispersed in the hole transport region.

[0392] The charge generation material may be, for example, a p-dopant.

[0393] In one embodiment, the p-dopant may have a lowest unoccupied molecular orbital (LUMO) energy level of -3.5 eV or less than -3.5 eV.

[0394] The p-dopant may include at least one selected from the group consisting of quinone derivatives, metal oxides, and compounds containing a cyano group, but the embodiments of the present disclosure are not limited thereto.

[0395] For example, the p-dopant may include at least one selected from the following: quinone derivatives such as tetracyanoquinodimethane (TCNQ) and / or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ);

[0396] metal oxides such as tungsten oxide and / or molybdenum oxide;

[0397] 1,4,5,8,9,12-hexaazatriphenylene-hexacarbonitrile (HAT-CN); and

[0398] a compound represented by the following formula 221,

[0399] but the embodiments of the present disclosure are not limited thereto:

[0400]

[0401]

[0402] Formula 221

[0403]

[0404] In formula 221,

[0405] R 221 to R 223 may each independently be selected from substituted or unsubstituted C 3 -C 10 cycloalkyl groups, substituted or unsubstituted C 1 -C 10 heterocycloalkyl groups, substituted or unsubstituted C 3 -C 10 cycloalkenyl groups, substituted or unsubstituted C 1 -C 10Heterocyclic alkenyl group, 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 and substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, wherein at least one selected from R 221 to R 223 may have at least one substituent selected from a cyano group, -F, -Cl, -Br, -I, C 1 -C 20 alkyl group substituted with -F, C 1 -C 20 alkyl group substituted with -Cl, C 1 -C 20 alkyl group substituted with -Br, and C 1 -C 20 alkyl group substituted with -I.

[0406] Emission layer in the organic layer 150

[0407] When the organic light-emitting device 10 is a full-color organic light-emitting device, according to the sub-pixels, the emission layer can be patterned into a red emission layer, a green emission layer or a blue emission layer. In one or more embodiments, the emission layer can 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 spaced apart from each other. In one or more embodiments, the emission layer can contain two or more materials selected from a material that emits red light, a material that emits green light, and a material that emits blue light, wherein the two or more materials are mixed with each other in a single layer to emit white light.

[0408] The thickness of the emission layer can be about to about For example, about to about When the thickness of the emission layer is within this range, excellent (or suitable) light emission characteristics can be obtained without a significant increase in the driving voltage.

[0409] Electron transport region in the organic layer 150

[0410] The electron transport region can have i) a single-layer structure including a single layer containing a single material, ii) a single-layer structure including a single layer containing multiple different materials, or iii) a multi-layer structure having multiple layers containing multiple different materials.

[0411] The electron transport region may include at least one selected from a buffer layer, a hole blocking layer, an electron control layer, an electron transport layer, and an electron injection layer, but the embodiments of the present disclosure are not limited thereto.

[0412] For example, the electron transport region may have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, or a buffer layer / electron transport layer / electron injection layer structure, wherein for each structure, the constituent layers are stacked in sequence from the emission layer. However, the embodiments of the structure of the electron transport region are not limited thereto.

[0413] The electron transport region (e.g., the buffer layer, hole blocking layer, electron control layer, and / or electron transport layer in the electron transport region) may contain a metal-free compound containing at least one nitrogen-containing ring with π-electron depletion.

[0414] "Nitrogen-containing ring with π-electron depletion" refers to a C 1 -C 60 heterocyclic group having at least one *-N=*' moiety as a ring-forming moiety.

[0415] For example, the "nitrogen-containing ring with π-electron depletion" may be i) a 5- to 7-membered hetero monocyclic group having at least one *-N=*' moiety, ii) a hetero polycyclic group in which two or more 5- to 7-membered hetero monocyclic groups each having at least one *-N=*' moiety are fused to each other, or iii) a hetero polycyclic group in which at least one of the 5- to 7-membered hetero monocyclic groups each having at least one *-N=*' moiety is fused to at least one C 5 -C 60 carbocyclic group.

[0416] Examples of the nitrogen-containing ring with π-electron depletion 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 are not limited thereto.

[0417] For example, the electron transport region may contain a compound represented by the following formula 601:

[0418] Formula 601

[0419] [Ar 601 xe11 -[(L 601 ) xe1 -R 601 xe21 .​​

[0420] In formula 601,

[0421] Ar 601 may be a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group,

[0422] xe11 may be 1, 2 or 3,

[0423] L 601 may be selected from substituted or unsubstituted C 3 -C 10 subcycloalkyl groups, substituted or unsubstituted C 1 -C 10 subheterocycloalkyl groups, substituted or unsubstituted C 3 -C 10 subcycloalkenyl groups, substituted or unsubstituted C 1 -C 10 subheterocycloalkenyl groups, substituted or unsubstituted C 6 -C 60 subaryl groups, substituted or unsubstituted C 1 -C 60 subheteroaryl groups, substituted or unsubstituted divalent non-aromatic fused polycyclic groups and substituted or unsubstituted divalent non-aromatic fused heteropolycyclic groups;

[0424] xe1 may be an integer from 0 to 5,

[0425] R 601 may be selected from substituted or unsubstituted C 3 -C 10 cycloalkyl groups, substituted or unsubstituted C 1 -C 10 heterocycloalkyl groups, substituted or unsubstituted C 3 -C 10 cycloalkenyl groups, substituted or unsubstituted C 1 -C 10 heterocycloalkenyl groups, substituted or unsubstituted C 6 -C 60 aryl groups, substituted or unsubstituted C 6 -C 60 aryloxy groups, substituted or unsubstituted C 6 -C 60 arylthio groups, substituted or unsubstituted C 1 -C 60Heteroaryl 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 ),

[0426] Q 601 to Q 603 can each independently be a C 1 -C 10 alkyl group, C 1 -C 10 alkoxy group, phenyl group, biphenyl group, terphenyl group, or naphthyl group, and

[0427] xe21 can be an integer from 1 to 5.

[0428] In one embodiment, at least one of the xe11 number of Ar 601 and the xe21 number of R 601 can include a nitrogen-containing ring with π-electron depletion.

[0429] In one embodiment, Ar in formula 601 601 can be selected from:

[0430] Benzene group, naphthalene group, fluorene group, spiro-bifluorene group, benzo[b]fluorene group, dibenzo[b,k]fluorene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, group, tetracene group, picene group, perylene group, pentacene group, indeno[1,2,3-cd]anthracene group, dibenzofuran group, dibenzothiophene group, carbazole group, imidazole group, pyrazole group, thiazole group, isothiazole group, oxazole group, isoxazole group, pyridine group, pyrazine group, pyrimidine group, pyridazine group, indazole group, purine group, quinoline group, isoquinoline group, benzoquinoline group, phthalazine group, naphthyridine group, quinoxaline group, quinazoline group, cinnoline group, phenanthridine group, acridine group, phenanthroline group, phenazine group, benzimidazole group, isobenzothiazole group, benzoxazole group, isobenzoxazole group, triazole group, tetrazole group, oxadiazole group, triazine group, thiadiazole group, imidazopyridine group, imidazopyrimidine group, and azacarbazole group; and

[0431] Each is independently selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazone group, C1 -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 ) and at least one of the substituted benzene group, naphthalene group, fluorene group, spiro - bifluorene group, benzo - fluorene group, dibenzo - fluorene group, phenalene group, phenanthrene group, anthracene group, fluoranthene group, benzo - phenanthrene group, pyrene group, group, tetracene group, picene group, perylene group, pentacene group, indeno - anthracene group, dibenzo - furan group, dibenzo - thiophene group, carbazole group, imidazole group, pyrazole group, thiazole group, isothiazole group, oxazole group, isoxazole group, pyridine group, pyrazine group, pyrimidine group, pyridazine group, indazole group, purine group, quinoline group, isoquinoline group, benzo - quinoline group, phthalazine group, naphthyridine group, quinoxaline group, quinazoline group, cinnoline group, phenanthridine group, acridine group, phenanthroline group, phenazine group, benzimidazole group, iso - benzothiazole group, benzoxazole group, iso - benzoxazole group, triazole group, tetrazole group, oxadiazole group, triazine group, thiadiazole group, imidazo - pyridine group, imidazo - pyrimidine group and azacarbazole group, and

[0432] Q 31 to Q 33 can each independently be selected from C 1 -C 10 alkyl group, C 1 -C 10 alkoxy group, phenyl group, biphenyl group, terphenyl group and naphthyl group.

[0433] When xe11 in Formula 601 is 2 or greater than 2, two or more than two Ar 601 can be connected to each other via a single bond.

[0434] In one or more embodiments, Ar in Formula 601 601 can be an anthracene group.

[0435] In one or more embodiments, the compound represented by Formula 601 can be represented by the following Formula 601 - 1:

[0436] Formula 601 - 1

[0437]

[0438] In Formula 601-1,

[0439] 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 at least one selected from X 614 to X 616 can be N,

[0440] L 611 to L 613 can each be understood by referring to the description provided regarding L 601 .

[0441] xe611 to xe613 can each be understood by referring to the description presented regarding xe1,

[0442] R 611 to R 613 can each be understood by referring to the description provided regarding R 601 , and

[0443] R 614 to R 616 can each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, C 1 -C 20 alkyl group, C 1 -C 20 alkoxy group, a phenyl group, a biphenyl group, a terphenyl group, and a naphthyl group.

[0444] In one embodiment, L 601 and L 611 to L 613 in Formula 601 and Formula 601-1 can each independently be selected from:

[0445] a phenylene group, a naphthylene group, a fluorenylene group, a spiro-bifluorenylene group, a benzo[9,10]fluorenylene group, a dibenzo[9,10]fluorenylene group, a phenanthrylene group, an anthrylene group, a fluoranthenylene group, a benzo[9,10]phenanthrylene group, a pyrenylene group, a Group, perylene diimide group, pentacene diimide group, hexacene diimide group, pentaphene diimide group, thiophene diimide group, furan diimide group, carbazole diimide group, indole diimide group, isoindole diimide group, benzofuran diimide group, benzothiophene diimide group, dibenzofuran diimide group, dibenzothiophene diimide group, benzocarbazole diimide group, dibenzocarbazole diimide group, dibenzosilole diimide group, pyridine diimide group, imidazole diimide group, pyrazole diimide group, thiazole diimide group, isothiazole diimide group, oxazole diimide group, isoxazole diimide group, thiadiazole diimide group, oxadiazole diimide group, pyrazine diimide group, pyrimidine diimide group, pyridazine diimide group, s-triazine diimide group, quinoline diimide group, isoquinoline diimide group, benzoquinoline diimide group, phthalazine diimide group, naphthyridine diimide group, quinoxaline diimide group, quinazoline diimide group, cinnoline diimide group, phenanthridine diimide group, acridine diimide group, phenanthroline diimide group, phenazine diimide group, benzimidazole diimide group, isobenzothiazole diimide group, benzoxazole diimide group, isobenzoxazole diimide group, triazole diimide group, tetrazole diimide group, imidazopyridine diimide group, imidazopyrimidine diimide group and azacarbazole diimide group; and

[0446] each independently selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C 1 -C 20 alkyl group, C 1 -C 20 alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorene group, spiro-bifluorene group, benzofluorenyl group, dibenzofluorenyl group, phenanthrenyl group, anthracenyl group, fluoranthenyl group, benzophenanthrenyl group, pyrenyl group, At least one of a phenyl group, a perylene group, a pentaphenyl group, a hexaphenyl group, a quaterphenyl group, a thiophenyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuryl group, a benzothiophenyl group, a dibenzofuryl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilolyl 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 quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, 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-substituted phenylene group, naphthylene group, fluorene group, spiro-bifluorene group, benzofluorene group, dibenzofluorene group, phenanthrene group, anthracene group, fluoranthene group, benzophenanthrene group, pyrene group, sub- A phenyl group, a perylene group, a pentaphenyl group, a hexaphenyl group, a quaterphenyl group, a thiophenyl group, a furyl group, a carbazolyl group, an indolyl group, an isoindolyl group, a benzofuryl group, a benzothiophenyl group, a dibenzofuryl group, a dibenzothiophenyl group, a benzocarbazolyl group, a dibenzocarbazolyl group, a dibenzosilolyl 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 quinolinyl group, an isoquinolinyl group, a benzoquinolinyl group, a phthalazinyl group, a naphthyridinyl group, a quinoxalinyl group, a quinazolinyl group, a cinnolinyl group, a phenanthridinyl group, an acridinyl group, a phenanthrolinyl group, a phenazinyl group, a benzimidazolyl group, 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,

[0447] However, the embodiments of the present disclosure are not limited thereto.

[0448] In one or more embodiments, xe1 and xe611 to xe613 in Formula 601 and Formula 601-1 may each independently be 0, 1, or 2.

[0449] In one or more embodiments, R in Formula 601 and Formula 601-1 601 and R 611 to R 613 may each independently be selected from:

[0450] phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenanthryl group, anthryl group, fluoranthenyl group, benzophenanthryl group, pyrenyl group, group, perylenyl group, pentaphenyl group, hexaphenyl group, quinquephenyl group, thienyl group, furyl group, carbazolyl group, indolyl group, isoindolyl group, benzofuryl group, benzothienyl group, dibenzofuryl group, dibenzothienyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzosilolyl group, pyridyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl 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, imidazopyridyl group, imidazopyrimidinyl group and azacarbazolyl group;

[0451] each independently being selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C 1 -C 20 alkyl group, C 1 -C 20 alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-bifluorenyl group, benzofluorenyl group, dibenzofluorenyl group, phenanthryl group, anthryl group, fluoranthenyl group, benzophenanthryl group, pyrenyl group, a phenyl group, a biphenyl group, a terphenyl group, a naphthyl group, a fluorene group, a spiro-bifluorene group, a benzofluorenyl group, a dibenzofluorenyl group, a phenanthryl group, an anthracenyl group, a fluoranthenyl group, a benzo[a]phenanthrenyl group, a pyrenyl group, which is substituted by at least one selected from the group consisting of a radical group, a perylene radical group, a pentaphenyl radical group, a sexiphenyl radical group, a quinquephenyl radical group, a thienyl radical group, a furyl radical group, a carbazolyl radical group, an indolyl radical group, an isoindolyl radical group, a benzofuranyl radical group, a benzothienyl radical group, a dibenzofuranyl radical group, a dibenzothienyl radical group, a benzocarbazolyl radical group, a dibenzocarbazolyl radical group, a dibenzosilolyl radical group, a pyridyl radical group, an imidazolyl radical group, a pyrazolyl radical group, a thiazolyl radical group, an isothiazolyl radical group, an oxazolyl radical group, an isoxazolyl radical group, a thiadiazolyl radical group, an oxadiazolyl radical group, a pyrazinyl radical group, a pyrimidinyl radical group, a pyridazinyl radical group, a triazinyl radical group, a quinolinyl radical group, an isoquinolinyl radical group, a benzoquinolinyl radical group, a phthalazinyl radical group, a naphthyridinyl radical group, a quinoxalinyl radical group, a quinazolinyl radical group, a cinnolinyl radical group, a phenanthridinyl radical group, an acridinyl radical group, a phenanthrolinyl radical group, a phenazinyl radical group, a benzimidazolyl radical group, an isobenzothiazolyl radical group, a benzoxazolyl radical group, an isobenzoxazolyl radical group, a triazolyl radical group, a tetrazolyl radical group, an imidazopyridinyl radical group, an imidazopyrimidinyl radical group, and an azacarbazolyl radical group; a radical group, a perylene radical group, a pentaphenyl radical group, a sexiphenyl radical group, a quinquephenyl radical group, a thienyl radical group, a furyl radical group, a carbazolyl radical group, an indolyl radical group, an isoindolyl radical group, a benzofuranyl radical group, a benzothienyl radical group, a dibenzofuranyl radical group, a dibenzothienyl radical group, a benzocarbazolyl radical group, a dibenzocarbazolyl radical group, a dibenzosilolyl radical group, a pyridyl radical group, an imidazolyl radical group, a pyrazolyl radical group, a thiazolyl radical group, an isothiazolyl radical group, an oxazolyl radical group, an isoxazolyl radical group, a thiadiazolyl radical group, an oxadiazolyl radical group, a pyrazinyl radical group, a pyrimidinyl radical group, a pyridazinyl radical group, a triazinyl radical group, a quinolinyl radical group, an isoquinolinyl radical group, a benzoquinolinyl radical group, a phthalazinyl radical group, a naphthyridinyl radical group, a quinoxalinyl radical group, a quinazolinyl radical group, a cinnolinyl radical group, a phenanthridinyl radical group, an acridinyl radical group, a phenanthrolinyl radical group, a phenazinyl radical group, a benzimidazolyl radical group, an isobenzothiazolyl radical group, a benzoxazolyl radical group, an isobenzoxazolyl radical group, a triazolyl radical group, a tetrazolyl radical group, an imidazopyridinyl radical group, an imidazopyrimidinyl radical group, and an azacarbazolyl radical group; and

[0452] -S(=O) 2 (Q 601 ) and -P(=O)(Q 601 )(Q 602 ), and

[0453] Q 601 and Q 602 are the same as those described above.

[0454] The electron transport region may include at least one compound selected from Compound ET1 to Compound ET36 below, but the embodiments of the present disclosure are not limited thereto:

[0455]

[0456]

[0457]

[0458]

[0459] In one or more embodiments, the electron transport region may include at least one compound selected from 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), NTAZ, and diphenyl(4-(triphenylsilyl)phenyl)-phosphine oxide (TSPO1):

[0460]

[0461]

[0462] The thickness of the buffer layer, hole blocking layer, and / or electron control layer may each independently be about to about For example, about to about When the thickness of the buffer layer, hole blocking layer, and electron control layer is within any of these ranges, the electron transport region may have excellent (or suitable) hole blocking characteristics and / or electron control characteristics without a significant increase in the driving voltage.

[0463] The thickness of the electron transport layer may be about to about For example, about to about When the thickness of the electron transport layer is within the range described above, the electron transport layer may have satisfactory (or suitable) electron transport characteristics without a significant increase in the driving voltage.

[0464] In addition to the materials described above, the electron transport region (e.g., the electron transport layer in the electron transport region) may further include a metal-containing material.

[0465] The metal-containing material may include at least one selected from alkali metal complexes and alkaline earth metal complexes. The alkali metal complex may contain metal ions selected from Li ions, Na ions, K ions, Rb ions, and Cs ions; and the alkaline earth metal complex may contain metal ions selected from Be ions, Mg ions, Ca ions, Sr ions, and Ba ions. The ligands coordinated with the metal ions of the alkali metal complex or the alkaline 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.

[0466] For example, the metal-containing material may include a Li complex. The Li complex may include, for example, the following compounds ET-D1 (lithium hydroxyquinoline, LiQ) and / or compound ET-D2:

[0467]

[0468] The electron transport region may include an electron injection layer that facilitates electron injection from the second electrode 190. The electron injection layer may be in direct contact with the second electrode 190.

[0469] The electron injection layer 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.

[0470] The electron injection layer may contain 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.

[0471] The alkali metal may be selected from Li, Na, K, Rb, and Cs. In one embodiment, the alkali metal may be Li, Na, and / or Cs. In one or more than one embodiment, the alkali metal may be Li and / or Cs, but the embodiments of the present disclosure are not limited thereto.

[0472] The alkaline earth metal may be selected from Mg, Ca, Sr, and Ba.

[0473] The rare earth metal may be selected from Sc, Y, Ce, Tb, Yb, and Gd.

[0474] The alkali metal compounds, alkaline earth metal compounds, and rare earth metal compounds may each independently be selected from oxides and halides (e.g., fluorides, chlorides, bromides, and / or iodides) of alkali metals, alkaline earth metals, and rare earth metals, respectively.

[0475] The alkali metal compound can be selected from alkali metal oxides (such as Li 2 O, Cs 2 O and / or K 2 O) and alkali metal halides (such as LiF, NaF, CsF, KF, LiI, NaI, CsI and / or KI). In one embodiment, the alkali metal compound can be selected from LiF, Li 2 O, NaF, LiI, NaI, CsI and KI, but the embodiments of the present disclosure are not limited thereto.

[0476] The alkaline earth metal compound can be selected from alkaline earth metal oxides, such as BaO, SrO, CaO, Ba x Sr 1-x O (0 < x < 1) and / or Ba x Ca 1-x O (0 < x < 1). In one embodiment, the alkaline earth metal compound can be selected from BaO, SrO and CaO, but the embodiments of the present disclosure are not limited thereto.

[0477] The rare earth metal compound can 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 can 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.

[0478] The alkali metal complex, alkaline earth metal complex and rare earth metal complex can respectively contain ions of the alkali metal, alkaline earth metal and rare earth metal as described above, and the ligands coordinated with the metal ions of the alkali metal complex, alkaline earth metal complex or rare earth metal complex can 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.

[0479] The electron injection layer may include the following (e.g., may be composed of the following): 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 as described above. In one or more embodiments, the electron injection layer may further comprise an organic material. When the electron injection layer further comprises an organic material, the alkali metal, alkaline earth metal, rare earth metal, alkali metal compound, alkaline earth metal compound, rare earth metal compound, alkali metal complex, alkaline earth metal complex, rare earth metal complex, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix containing the organic material.

[0480] The thickness of the electron injection layer may be about to about For example, about to about When the thickness of the electron injection layer is within any of these ranges, satisfactory (or suitable) electron injection characteristics can be obtained without a significant increase in the driving voltage.

[0481] The second electrode 190

[0482] The second electrode 190 may be located on the organic layer 150 having a structure according to an embodiment of the present disclosure. The second electrode 190 may be a cathode, which is an electron injection electrode, and in this regard, the material used to form the second electrode 190 may be selected from metals, alloys, conductive compounds having a relatively low work function, and combinations thereof.

[0483] 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.

[0484] The second electrode 190 may have a single-layer structure, or a multi-layer structure including two or more layers.

[0485] Figures 2 to 4 description

[0486] Figure 2 The organic light-emitting device 20 has a structure in which the first cover layer 210, the first electrode 110, the organic layer 150, and the second electrode 190 are stacked in this specified order, Figure 3 The organic light-emitting device 30 has a structure in which the first electrode 110, the organic layer 150, the second electrode 190, and the second cover layer 220 are stacked in this specified order, and Figure 4The organic light-emitting device 40 has a structure in which a first cover layer 210, a first electrode 110, an organic layer 150, a second electrode 190, and a second cover layer 220 are sequentially stacked in this specified order.

[0487] Regarding Figures 2 to 4 , the first electrode 110, the organic layer 150, and the second electrode 190 can be understood by referring to the corresponding descriptions provided regarding Figure 1 provided.

[0488] In the organic layer 150 of each of the organic light-emitting device 20 and the organic light-emitting device 40, the light generated in the emission layer can pass through the first electrode 110 and the first cover layer 210 toward the outside, where the first electrode 110 can be a semi-transmissive electrode or a transmissive electrode. In the organic layer 150 of each of the organic light-emitting device 30 and the organic light-emitting device 40, the light generated in the emission layer can pass through the second electrode 190 and the second cover layer 220 toward the outside, where the second electrode 190 can be a semi-transmissive electrode or a transmissive electrode.

[0489] The first cover layer 210 and the second cover layer 220 can increase the external light-emitting efficiency according to the principle of constructive interference.

[0490] The first cover layer 210 and the second cover layer 220 can each independently be an organic cover layer containing an organic material, an inorganic cover layer containing an inorganic material, or a composite cover layer containing an organic material and an inorganic material.

[0491] At least one selected from the first cover layer 210 and the second cover layer 220 can each independently contain at least one material selected from a carbocyclic compound, a heterocyclic compound, an amine-based compound, a porphyrin derivative, a phthalocyanine derivative, a naphthalocyanine derivative, an alkali metal complex, and an alkaline earth metal complex. The carbocyclic compound, the heterocyclic compound, and the amine-based compound can each independently be optionally substituted with a substituent containing at least one element selected from O, N, S, Se, Si, F, Cl, Br, and I. In one embodiment, at least one selected from the first cover layer 210 and the second cover layer 220 can each independently contain an amine-based compound.

[0492] In one embodiment, at least one selected from the first cover layer 210 and the second cover layer 220 can each independently contain the compound represented by Formula 201 and / or the compound represented by Formula 202.

[0493] In one or more embodiments, at least one selected from the first cover layer 210 and the second cover layer 220 can each independently contain a compound selected from Compound HT28 to Compound HT33 and the following Compounds CP1 to CP5, but the embodiments of the present disclosure are not limited thereto:

[0494]

[0495] Above, an organic light emitting device according to an embodiment has been described in connection with Figures 1 to 4 However, embodiments of the present disclosure are not limited thereto.

[0496] The layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region may 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 (LITI).

[0497] When the layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region are formed by vacuum deposition, considering the material to be included in the layer to be formed and the structure of the layer to be formed, the deposition temperature may be from about 100 °C to about 500 °C, about 10 -8 Torr to about 10 -3 Torr of vacuum degree and about to about of deposition rate for deposition.

[0498] When the layer constituting the hole transport region, the emission layer, and the layer constituting the electron transport region are formed by spin coating, considering the material to be included in the layer to be formed and the structure of the layer to be formed, spin coating may 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.

[0499] Device

[0500] The organic light emitting device may be included in various suitable devices.

[0501] An example of such a device may include: a thin film transistor including a source electrode, a drain electrode, and an active layer; and an organic light emitting device. Here, the first electrode of the organic light emitting device may be in electrical contact with the source electrode or the drain electrode of the thin film transistor.

[0502] The thin film transistor may further include a gate electrode, a gate insulating layer, etc.

[0503] The active layer may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, etc., but embodiments of the present disclosure are not limited thereto.

[0504] The device may further include a sealing member for sealing the organic light-emitting device. The sealing member may allow an image from the organic light-emitting device to be realized and may prevent (or reduce) the penetration of external air and / or moisture into the organic light-emitting device. The sealing member may be a sealing substrate including transparent glass and / or a plastic substrate. The sealing member may be a thin-film encapsulation layer including a plurality of organic layers and / or a plurality of inorganic layers. When the sealing member is a thin-film encapsulation layer, the entire device may be flexible.

[0505] For example, the device may be a light-emitting device, an authentication device, and / or an electronic device.

[0506] The light-emitting device may be used as various suitable displays, light sources, etc.

[0507] The authentication device may be, for example, a biometric authentication device for authenticating an individual by using biometric information of a biometric body (e.g., a fingertip, a pupil, etc.). The authentication device may further include a biometric information collector other than the organic light-emitting device.

[0508] The electronic device may be applied to a personal computer (e.g., a mobile personal computer), a mobile phone, a digital camera, an electronic notepad, an electronic dictionary, an electronic game machine, a medical instrument (e.g., an electronic thermometer, a sphygmomanometer, a blood glucose meter, a pulse measuring device, a pulse wave measuring device, an electrocardiogram (ECG) monitor, an ultrasonic diagnostic device, and / or an endoscope monitor), a fish finder, various measuring instruments, meters (e.g., meters for vehicles, aircraft, and ships), a projector, etc., but the embodiments of the present disclosure are not limited thereto.

[0509] General definition of substituents

[0510] As used herein, the term "π-electron-depleted nitrogen-containing cyclic group" refers to a cyclic group having at least one *-N=*' moiety, and non-limiting examples thereof include 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 pyridazine group, a pyrimidine 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.

[0511] The π-electron-depleted nitrogen-free cyclic group may be selected from a benzene group, a heptalene group, an indene group, a naphthalene group, a azulene group, an indacene group, an acenaphthene group, a fluorene group, a spiro-bifluorene group, a benzo[b]fluorene group, a dibenzo[b,d]fluorene group, a phenalene group, a phenanthrene group, an anthracene group, a fluoranthene group, a benzo[a]phenanthrene group, a pyrene group, a perylene group, a tetracene group, a picene group, a pentacene group, a hexacene group, a rubicene group, a coronene group, an ovalene group, a pyrrole group, an isoindole group, an indole group, a furan group, a thiophene group, a benzofuran group, a benzothiophene group, a benzocarbazole group, a dibenzocarbazole group, a dibenzofuran group, a dibenzothiophene group, a dibenzothiophene sulfone group, a carbazole group, a dibenzosilole group, an indeno[1,2-b]carbazole group, an indolo[2,3-a]carbazole group, a benzofuro[2,3-b]carbazole group, a benzothieno[2,3-b]carbazole group, and a triindolo[1,2-a:3,4-a':7,8-a'']benzene group, but the embodiments of the present disclosure are not limited thereto.

[0512] As used herein, the term "transition metal of the 4th period of the periodic table" refers to the elements of the 4th period and the d-block of the periodic table, and non-limiting examples thereof include scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), and zinc (Zn).

[0513] As used herein, the term "transition metal of the 5th period of the periodic table" refers to the elements of the 5th period and the d-block of the periodic table, and non-limiting examples thereof include yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).

[0514] As used herein, the term "transition metal of the 6th period of the periodic table" refers to the elements of the 6th period and the d-block and f-block of the periodic table, and non-limiting examples thereof include lanthanum (La), samarium (Sm), europium (Eu), terbium (Tb), thulium (Tm), ytterbium (Yb), lutetium (Lu), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pt), gold (Au), and mercury (Hg).

[0515] As used herein, the term "C 1 -C 60 alkyl group" refers to a straight-chain or branched-chain aliphatic saturated hydrocarbon monovalent group having 1 to 60 carbon atoms, and non-limiting examples thereof include a methyl group, an ethyl group, a propyl group, an isobutyl group, a sec-butyl group, a tert-butyl group, a pentyl group, an isopentyl group, and a hexyl group. In some embodiments, the C 1 -C 60 alkyl group may be C 1 -C 30Alkyl group, C 1 -C 20 alkyl group or C 1 -C 10 alkyl group. As used herein, the term "C 1 -C 60 alkylene group" refers to a divalent group having the same structure as that of the C 1 -C 60 alkyl group.

[0516] As used herein, the term "C 2 -C 60 alkenyl group" refers to a hydrocarbon group having at least one carbon-carbon double bond in the middle and / or at the end of, for example, a C 2 -C 60 alkyl group, and non-limiting examples thereof include vinyl group, propenyl group, and butenyl group. In some embodiments, the C 2 -C 60 alkenyl group may be a C 2 -C 30 alkenyl group, a C 2 -C 20 alkenyl group, or a C 2 -C 10 alkenyl group. As used herein, the term "C 2 -C 60 alkenylene group" refers to a divalent group having the same structure as that of the C 2 -C 60 alkenyl group.

[0517] As used herein, the term "C 2 -C 60 alkynyl group" refers to a hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the end of a C 2 -C 60 alkyl group, and non-limiting examples thereof include ethynyl group and propynyl group. In some embodiments, the C 2 -C 60 alkynyl group may be a C 2 -C 30 alkynyl group, a C 2 -C 20 alkynyl group, or a C 2 -C 10 alkynyl group. As used herein, the term "C 2 -C 60 alkynylene group" refers to a divalent group having the same structure as that of the C 2 -C 60 alkynyl group.

[0518] As used herein, the term "C1 -C 60 The term "alkoxy group" refers to a monovalent group represented by -OA 101 (where A 101 is C 1 -C 60 alkyl group), and non-limiting examples thereof include methoxy group, ethoxy group, and isopropoxy group.

[0519] As used herein, the term "C 3 -C 10 cycloalkyl group" refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, and non-limiting examples thereof include cyclopropyl group, cyclobutyl group, cyclopentyl group, cyclohexyl group, and cycloheptyl group. As used herein, the term "C 3 -C 10 subcycloalkyl group" refers to a divalent group having the same structure as that of the C 3 -C 10 cycloalkyl group.

[0520] As used herein, the term "C 1 -C 10 heterocycloalkyl group" refers to a monovalent monocyclic group having at least one heteroatom selected from N, O, Si, P, and S (e.g., 1 to 6 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) as ring-forming atoms and 1 to 10 carbon atoms as the remaining ring-forming atoms, and non-limiting examples thereof include 1,2,3,4-oxadiazolyl group, tetrahydrofuryl group, and tetrahydrothienyl group. As used herein, the term "C 1 -C 10 subheterocycloalkyl group" refers to a divalent group having the same structure as that of the C 1 -C 10 heterocycloalkyl group.

[0521] As used herein, the term "C 3 -C 10 cycloalkenyl group" refers to a monovalent monocyclic group having 3 to 10 carbon atoms and at least one carbon-carbon double bond in its ring and no aromaticity, and non-limiting examples thereof include cyclopentenyl group, cyclohexenyl group, and cycloheptenyl group. As used herein, the term "C 3 -C 10 subcycloalkenyl group" refers to a divalent group having the same structure as that of the C 3 -C 10 cycloalkenyl group.

[0522] As used herein, the term "C 1 -C 10"Heterocyclic alkenyl group" refers to a monovalent monocyclic group having at least one heteroatom selected from N, O, Si, P, and S (e.g., 1 to 6 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) as ring-forming atoms, 1 to 10 carbon atoms as the remaining ring-forming atoms, and at least one double bond. C 1 -C 10 Non-limiting examples of heterocyclic alkenyl groups include 4,5-dihydro-1,2,3,4-oxatriazolyl groups, 2,3-dihydrofuranyl groups, and 2,3-dihydrothienyl groups. As used herein, the term "C 1 -C 10 "Heterocyclic alkenylene group" refers to a divalent group having the same structure as the C 1 -C 10 heterocyclic alkenyl group.

[0523] As used herein, the term "C 6 -C 60 "Aryl group" refers to a monovalent group having a carbocyclic aromatic system containing 6 to 60 carbon atoms. C 6 -C 60 Non-limiting examples of aryl groups include phenyl groups, naphthyl groups, anthracenyl groups, phenanthryl groups, pyrenyl groups, and yl groups. In some embodiments, C 6 -C 60 The aryl group can be a C 6 -C 30 aryl group, a C 6 -C 24 aryl group, or a C 6 -C 18 aryl group. As used herein, the term "C 6 -C 60 "Arylene group" refers to a divalent group having the same structure as the C 6 -C 60 aryl group. When the C 6 -C 60 aryl group and the C 6 -C 60 arylene group each independently contain 2 or more rings, the rings can be fused to each other.

[0524] As used herein, the term "C 1 -C 60 "Heteroaryl group" refers to a monovalent group having a heterocyclic aromatic system containing at least one heteroatom selected from N, O, Si, P, and S (e.g., 1 to 6 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) in addition to 1 to 60 carbon atoms. C 1 -C60 Non-limiting examples of heteroaryl groups include pyridyl groups, pyrimidinyl groups, pyrazinyl groups, pyridazinyl groups, triazinyl groups, quinolinyl groups, and isoquinolinyl groups. In some embodiments, C 1 -C 60 The heteroaryl group can be a C 1 -C 30 heteroaryl group, a C 1 -C 24 heteroaryl group, or a C 1 -C 18 heteroaryl group. As used herein, the term "C 1 -C 60 heteroarylene group" refers to a divalent group having the same structure as a C 1 -C 60 heteroaryl group. When a C 1 -C 60 heteroaryl group and a C 1 -C 60 heteroarylene group each independently contain two or more than two rings, the respective rings can be condensed / fused with each other.

[0525] As used herein, the term "C 6 -C 60 aryloxy group" refers to a group represented by -OA 102 (where A 102 is a C 6 -C 60 aryl group), and as used herein, the term "C 6 -C 60 arylthio group" refers to a group represented by -SA 103 (where A 103 is a C 6 -C 60 aryl group).

[0526] As used herein, the term "C 1 -C 60 heteroaryloxy group" refers to a monovalent group represented by -OA 104 (where A 104 is a C 1 -C 60 heteroaryl group), and as used herein, the term "C 1 -C 60 heteroarylthio group" refers to a monovalent group represented by -SA 105 (where A 105 is a C 1 -C 60 heteroaryl group).

[0527] As used herein, the term "monovalent non-aromatic fused polycyclic group" refers to a monovalent group having two or more rings fused to each other, having only carbon atoms as ring-forming atoms (e.g., 8 to 60 carbon atoms, such as 8 to 30 or 8 to 20 carbon atoms), and not having aromaticity in its entire molecular structure (e.g., the molecular structure as a whole is non-aromatic). Non-limiting examples of the monovalent non-aromatic fused polycyclic group are fluorenyl groups. As used herein, the term "divalent non-aromatic fused polycyclic group" refers to a divalent group having the same structure as that of the monovalent non-aromatic fused polycyclic group.

[0528] As used herein, the term "monovalent non-aromatic fused heteropolycyclic group" refers to a monovalent group having two or more rings fused to each other, having at least one heteroatom selected from N, O, Si, P, and S (e.g., 1 to 60 carbon atoms, such as 1 to 30 or 1 to 20 carbon atoms, and 1 to 6 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) in addition to carbon atoms as ring-forming atoms and not having aromaticity in its entire molecular structure (e.g., the molecular structure as a whole is non-aromatic). Non-limiting examples of the monovalent non-aromatic fused heteropolycyclic group are carbazolyl groups. As used herein, the term "divalent non-aromatic fused heteropolycyclic group" refers to a divalent group having the same structure as that of the monovalent non-aromatic fused heteropolycyclic group.

[0529] As used herein, the term "C 5 -C 60 carbocyclic group" refers to a monocyclic or polycyclic group having 5 to 60 carbon atoms, wherein the ring-forming atoms are only carbon atoms. As used herein, the term "C 5 -C 60 carbocyclic group" refers to an aromatic carbocyclic group or a non-aromatic carbocyclic group. The C 5 -C 60 carbocyclic group can be a ring (e.g., benzene); a monovalent group (e.g., phenyl group); or a divalent group (e.g., phenylene group). In some embodiments, the C 5 -C 60 carbocyclic group can be a C 5 -C 30 carbocyclic group, a C 5 -C 20 carbocyclic group, or a C 5 -C 12 carbocyclic group. In one or more embodiments, depending on the number of substituents attached to the C 5 -C 60 carbocyclic group, the C 5 -C 60 carbocyclic group can be a trivalent group or a tetravalent group.

[0530] As used herein, the term "C" 1 -C 60 heterocyclic group" refers to a group having the same structure as a C 5 -C 60 carbocyclic group, but in addition to carbon atoms (the number of carbon atoms can be from 1 to 60, such as from 1 to 30, from 1 to 20, or from 1 to 12), at least one heteroatom selected from N, O, Si, P, and S (for example, 1 to 6 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) is used as a ring-forming atom.

[0531] In this specification, a substituted C 5 -C 60 carbocyclic group, a substituted C 1 -C 60 heterocyclic group, a substituted C 3 -C 10 subcycloalkyl group, a substituted C 1 -C 10 subheterocycloalkyl group, a substituted C 3 -C 10 subcycloalkenyl group, a substituted C 1 -C 10 subheterocycloalkenyl group, a substituted C 6 -C 60 subaryl group, a substituted C 1 -C 60 subheteroaryl group, a substituted divalent non-aromatic fused polycyclic group, a substituted divalent non-aromatic fused heteropolycyclic group, a substituted C 1 -C 60 alkyl group, a substituted C 2 -C 60 alkenyl group, a substituted C 2 -C 60 alkynyl group, a substituted C 1 -C 60 alkoxy group, a substituted C 3 -C 10 cycloalkyl group, a substituted C 1 -C 10 heterocycloalkyl group, a substituted C 3 -C 10 cycloalkenyl group, a substituted C 1 -C 10 heterocycloalkenyl group, a substituted C 6 -C 60 aryl group, a substituted C 6 -C 60 aryloxy group, a substituted C 6 -C60 Arylthio group, substituted C 1 -C 60 Heteroaryl group, substituted C 1 -C 60 Heteroaryloxy group, substituted C 1 -C 60 At least one substituent of the heteroarylthio group, substituted monovalent non-aromatic fused polycyclic group, and substituted monovalent non-aromatic fused heteropolycyclic group may be selected from:

[0532] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C 1 -C 60 Alkyl group, C 2 -C 60 Alkenyl group, C 2 -C 60 Alkynyl group and C 1 -C 60 Alkoxy group;

[0533] Each independently selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidino group, hydrazino group, hydrazono group, C 3 -C 10 Cycloalkyl group, 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, C 1 -C 60 Heteroaryloxy group, C 1 -C 60 Heteroarylthio 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 ) in which at least one substituted C 1 -C 60 alkyl group, C 2 -C 60 alkenyl group, C 2 -C 60 alkynyl group and C 1 -C 60 alkoxy group;

[0534] C 3 -C 10 cycloalkyl group, 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, C 1 -C 60 heteroaryloxy group, C 1 -C 60 heteroarylthio group, monovalent non-aromatic fused polycyclic group and monovalent non-aromatic fused heteropolycyclic group;

[0535] each independently selected from deuterium, -F, -Cl, -Br, -I, hydroxy group, cyano group, nitro group, amidino group, hydrazino group, 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 group, C 3 -C 10 cycloalkyl group, 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, C 1 -C 60 Heteroaryloxy group, C 1 -C 60 Heteroarylthio 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 ) in which at least one of the substituents of C 3 -C 10 Cycloalkyl group, 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, C 1 -C 60 Heteroaryloxy group, C 1 -C 60 Heteroarylthio group, monovalent non-aromatic fused polycyclic group and monovalent non-aromatic fused heteropolycyclic group; and

[0536] -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

[0537] Q 11 to Q 13 、Q 21 to Q 23 and Q 31 to Q 33 may each independently be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxy group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, C 1 -C 60 alkyl group, C 2 -C 60 alkenyl group, C 2 -C 60 alkynyl group, C 1 -C 60 alkoxy group, C 3 -C 10 cycloalkyl group, 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 heteroaryl group, C 1 -C 60 heteroaryloxy group, C 1 -C 60 heteroarylthio group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, a C 1 -C 60 alkyl group substituted with at least one selected from deuterium, -F and a cyano group, a C 6 -C 60 aryl group substituted with at least one selected from deuterium, -F and a cyano group, a biphenyl group and a terphenyl group.

[0538] As used herein, the term "Ph" refers to a phenyl group, the term "Me" refers to a methyl group, the term "Et" refers to an ethyl group, the term "ter-Bu" or "Bu t " refers to a tert-butyl group, the term "OMe" refers to a methoxy group, and "D" refers to deuterium.

[0539] As used herein, the term "biphenyl group" refers to "a phenyl group substituted with a phenyl group". For example, a "biphenyl group" can be a substituted phenyl group having a C 6 -C 60 aryl group as a substituent.

[0540] As used herein, the term "terphenyl group" refers to "a phenyl group substituted with a biphenyl group". For example, a "terphenyl group" can be a substituted phenyl group having a C 6 -C 60 aryl group substituted C 6 -C 60 aryl group as a substituent.

[0541] Unless otherwise defined, each of * and *' as used herein refers to the attachment site to the adjacent atom in the corresponding formula.

[0542] Hereinafter, the compounds according to the embodiments and the organic light-emitting devices according to the embodiments will be described in more detail with reference to the examples.

[0543] Examples

[0544] Evaluation Example 1: T 1 , S 1 , K RISC , evaluation of f and HOMO energy levels

[0545] By using the above method, the T 1起始 , T 1最大 , S 1起始 , S 1最大 , K RISC and / or f of the following compounds were evaluated. The results are shown in Tables 1 to 5.

[0546] Table 1

[0547]

[0548]

[0549] Table 2

[0550] Second compound <![CDATA[T of the second compound 1起始 (eV)]]> <![CDATA[T of the second compound 1最大 (eV)]]> ET-06 3.07 2.87 ET-08 3.06 2.85 ET-09 2.99 2.81 ET-11 2.95 2.83 ET-13 3.02 2.85 ET-14 2.93 2.79 ET-15 2.98 2.85

[0551] Table 3

[0552] Third compound <![CDATA[T of the third compound 1起始 (eV)]]> <![CDATA[T of the third compound 1最大 (eV)]]> PT9 2.86 2.75 PT19 2.88 2.78 PT23 2.90 2.78 PT25 2.79 2.69 PT28 2.81 2.70 PT33 2.83 2.71 PT36 2.78 2.73

[0553] Table 4

[0554]

[0555]

[0556] Table 5

[0557]

[0558] Example 1-1

[0559] As the anode, a substrate deposited with indium tin oxide (ITO) was cut into a size of 50 mm × 50 mm × 0.5 mm, and ultrasonically treated with isopropyl alcohol and pure water for 5 minutes, and then cleaned by ultraviolet irradiation for 30 minutes and exposure to ozone. The obtained ITO substrate was mounted to a vacuum deposition apparatus.

[0560] m-MTDATA was deposited on the ITO substrate to form a hole injection layer having a thickness, and then NPB was vacuum deposited on the hole injection layer to form a hole transport layer having a thickness, and on the hole transport layer, compound HT-07, compound ET-06, compound PT9, and compound D-10 were co-deposited at a weight ratio of 30:70:15:1 to form an emission layer having a thickness. Compound ET1 was deposited on the emission layer to form an electron transport layer having a thickness. Al was deposited on the electron transport layer to form a cathode having a thickness, thereby completing the fabrication of the organic light-emitting device.

[0561] Examples 1-2 to 1-10 and Comparative Examples 1-1 to 1-20

[0562] Organic light-emitting devices were fabricated in substantially the same manner as in Example 1-1, except that the emission layers were formed using the compounds shown in Table 6, respectively. The third compound was selected from Group III-II.

[0563] Evaluation Example 2

[0564] The efficiencies, emission wavelengths, and service lives of the organic light-emitting devices fabricated according to Examples 1-1 to 1-10 and Comparative Examples 1-1 to 1-20 were measured using a Keithley SMU 236 and a luminance meter PR650 at a current density of 10 mA / cm 2 . The results are shown in Table 6. The service life is a measure of the time taken for the luminance to reach 90% of the initial luminance.

[0565] Table 6

[0566]

[0567]

[0568] Table 6 shows that the organic light-emitting devices of Examples 1-1 to 1-10 have improved current efficiency and service life compared to the organic light-emitting devices of Comparative Examples 1-1 to 1-20.

[0569] Example 2-1

[0570] As the anode, a substrate deposited with indium tin oxide (ITO) was cut into a size of 50 mm × 50 mm × 0.5 mm, and ultrasonically treated with isopropyl alcohol and pure water for 5 minutes, and then cleaned by ultraviolet irradiation for 30 minutes and exposure to ozone. The obtained ITO substrate was mounted on a vacuum deposition apparatus.

[0571] m-MTDATA was deposited on the ITO substrate to form a hole injection layer having a thickness. Subsequently, NPB was vacuum-deposited on the hole injection layer to form a hole transport layer having a thickness, and on the hole transport layer, Compound HT-07, Compound ET-06, Compound PT9, and Compound D-10 were co-deposited at a weight ratio of 30:70:15:1 to form an emission layer having a thickness. Compound HBL03 was deposited on the emission layer to form a hole blocking layer having a thickness, and ET-1 was deposited to form an electron transport layer having a thickness. Al was deposited on the electron transport layer to form a cathode having a thickness, thereby completing the fabrication of the organic light-emitting device.

[0572] Examples 2-2 to 2-10 and Comparative Examples 2-1 to 2-20

[0573] Organic light-emitting devices were fabricated in substantially the same manner as in Example 2-1, but the emission layers were formed using the compounds shown in Table 7. The third compound was selected from Group III-II.

[0574] Table 7

[0575]

[0576]

[0577] Table 7 shows that the organic light-emitting devices of Examples 2-1 to 2-10 have improved current efficiency and longer service life compared to the organic light-emitting devices of Comparative Examples 2-1 to 2-20.

[0578] The terms “substantially,” “about,” and similar terms are used as terms of approximation and not as terms of degree, and are intended to account for inherent deviations in measured or calculated values that would be recognized by a person of ordinary skill in the art.

[0579] In addition, any numerical range recited herein is intended to include all sub-ranges of the same numerical precision subsumed within the recited range. For example, a range of “1.0 to 10.0” is intended to include all sub-ranges between (and including) the recited minimum value of 1.0 and the recited maximum value of 10.0, 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, for example, 2.4 to 7.6. Any maximum numerical limitation recited herein is intended to include all lower numerical limitations subsumed therein, and any minimum numerical limitation recited in this specification is intended to include all higher numerical limitations subsumed therein. Accordingly, the applicant reserves the right to modify this specification (including the claims) to expressly recite any sub-range that is subsumed within the ranges expressly recited herein.

[0580] As described above, the organic light emitting device according to an embodiment of the present disclosure can have high efficiency and a long service life.

[0581] It should be understood that the embodiments described herein are to be considered in a descriptive sense only and not for purposes of limitation. The description of features or aspects within each embodiment is generally to be considered applicable to other similar features or aspects in other embodiments. Although one or more embodiments have been described with reference to the drawings, those of ordinary skill in the art will understand that various changes in form and detail may be made herein without departing from the spirit and scope of the present disclosure as defined by the claims and their equivalents.

Claims

1. An organic light-emitting device, comprising: a first electrode, a second electrode, and an organic layer between the first electrode and the second electrode, wherein the organic layer includes an emission layer, the emission layer contains a first compound, a second compound, a third compound, and a fourth compound, the first compound, the second compound, the third compound, and the fourth compound are different from each other, the third compound contains a metal element having an atomic number of 40 or greater than 40, the fourth compound contains boron, the third compound and the fourth compound each satisfy the following conditions 1-1 and condition 1-2, and the fourth compound satisfies condition 2 and / or condition 3: Condition 1-1 T 1 (C3) 起始 ≥S 1 (C4) 起始 Condition 1-2 T 1 (C3) 最大 ≥S 1 (C4) 最大 Condition 2 K RISC (C4)≥10 3 S -1 Condition 3 f(C4)≥0.1, wherein, in condition 1-1, condition 1-2, condition 2, and condition 3, S 1 (C4) 起始 is the singlet energy of the fourth compound at the starting wavelength in the photoluminescence spectrum of the fourth compound; T 1 (C3) 起始 is the triplet energy of the third compound at the starting wavelength in the photoluminescence spectrum of the third compound; S 1 (C4) 最大 is the singlet energy of the fourth compound at the maximum emission wavelength in the photoluminescence spectrum of the fourth compound; T 1 (C3) 最大 is the triplet energy of the third compound at the maximum emission wavelength of the photoluminescence spectrum of the third compound; K RISC (C4) is the reverse intersystem crossing constant of the fourth compound; and f(C4) is the oscillation strength of the fourth compound, where K RISC (C4) is calculated by Equation 1: Equation 1 In Equation 1, φ PL is the photoluminescence quantum yield of the fast luminescence component derived from the transient electroluminescence spectrum of the fourth compound, τ p is the lifetime of the luminescence component derived from the transient electroluminescence spectrum of the fourth compound, τ d is the lifetime of the luminescence component derived from the delayed electroluminescence spectrum of the fourth compound, k r is the radioactive decay rate constant of the fourth compound from S1 to S0 and is calculated by the following Equation 2: Equation 2 wherein the fourth compound is represented by Formula 4: Formula 4 In Formula 4, X 41 is B, Y 41 to Y 43 each independently is O, S, N(R 45 ), B(R 45 ), C(R 45 )(R 46 ), or Si(R 45 )(R 46 ), k41 is 0 or 1, where when k41 is 0, -(Y 41 ) k41 - does not exist, A 41 to A 43 each independently selected from C 5 -C 30 carbocyclic groups and C 1 -C 30 heterocyclic groups, R 41 to R 43 、R 45 and R 46 each 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 hydrazino group, a hydrazono 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 substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), -N(Q 1 )(Q 2 ), -P(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O)(Q 1 ), -S(=O) 2 (Q 1 ), -P(=O)(Q 1 )(Q 2 )(Q and -P(=S)(Q 1 )(Q 2 ), wherein R 41 to R 43 , R 45 and R 46 are optionally connected to each other to form a substituted or unsubstituted C 5 -C 30 carbocyclic group or a substituted or unsubstituted C 1 -C 30 heterocyclic group, b41 to b43 are each independently an integer from 0 to 10, and Q 1 to Q 3 、Q 21 to Q 23 and Q 31 to Q 33 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxy group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, C 1 -C 60 alkyl group, C 2 -C 60 alkenyl group, C 2 -C 60 alkynyl group, C 1 -C 60 alkoxy group, C 3 -C 10 cycloalkyl group, 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, C 1 -C 60 heteroaryloxy group, C 1 -C 60 heteroarylthio group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, a biphenyl group and a terphenyl group.

2. The organic light-emitting device according to claim 1, wherein the first compound is represented by Formula 1, the second compound is represented by Formula 10, the third compound is represented by Formula 3: Formula 1 Formula 10 Formula 3 M 31 (L 31 ) n31 (L 32 ) n32 wherein, in Formula 1, Formula 3, and Formula 10, X 11 Selected from O, S, N(R 19 ) and C(R 19 )(R 20 ), R 11 to R 20 each independently selected from: A group represented by *-(L 11 ) a11 -A 11 hydrogen, deuterium, C 1 -C 60 alkyl group, a nitrogen-free cyclic group depleted of π electrons, -C(Q 1 )(Q 2 )(Q 3 )、-Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 ) and -N(Q 1 )(Q 2 ); Selected from deuterium, C 1 -C 60 alkyl group, a π - electron - depleted nitrogen - free cyclic group, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ), and -N(Q 31 )(Q 32 ), and at least one substituted π - electron - depleted nitrogen - free cyclic group; and Selected from deuterium, C 1 -C 60 alkyl group, a nitrogen-free cyclic group depleted of π electrons, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ), and a π-electron-depleted nitrogen-free cyclic group substituted by at least one of them, a π-electron-depleted nitrogen-free cyclic group substituted by at least one of them L 11 Selected from: π - electron - depleted nitrogen - free cyclic groups, -C(Q 1 )(Q 2 )-, -Si(Q 1 )(Q 2 )-, -B(Q 1 )-, and -N(Q 1 )-; and Selected from deuterium, C 1 -C 60 alkyl group, a nitrogen-free cyclic group with π-electron depletion, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ), and at least one substituted nitrogen-free cyclic group with π-electron depletion, a11 is selected from 1, 2, and 3, A 11 Selected from: a π-electron-depleted nitrogen-free cyclic group; Selected from deuterium, C 1 -C 60 alkyl group, a nitrogen-free cyclic group depleted of π electrons, -C(Q 31 )(Q 32 )(Q 33 ), -Si(Q 31 )(Q 32 )(Q 33 ), -B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ), and at least one substituted nitrogen-free cyclic group depleted of π electrons; and Selected from deuterium, C 1 -C 60 alkyl group, π - electron - depleted nitrogen - free cyclic group, -C(Q 21 )(Q 22 )(Q 23 ), -Si(Q 21 )(Q 22 )(Q 23 ), -B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ), and substituted by at least one π - electron - depleted nitrogen - free cyclic group L 101 to L 103 each independently selected from substituted or unsubstituted C 5 -C 30 carbocyclic group and substituted or unsubstituted C 1 -C 30 heterocyclic group, a101 to a103 are each independently selected from 0, 1, and 2, and R 101 to R 103 each independently selected from substituted or unsubstituted C 3 -C 10 cycloalkyl group, substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 cycloalkenyl group, 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 group, 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, -C(Q 1 )(Q 2 )(Q 3 )、-Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-N(Q 1 )(Q 2 )、-P(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O)(Q 1 )、-S(=O) 2 (Q 1 )、-P(=O)(Q 1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ), and M 31 Transition metals selected from the 4th, 5th, and 6th periods of the periodic table of elements L 31 is a ligand represented by one selected from Formula 3A to Formula 3D, L 32 selected from monodentate ligands, bidentate ligands, and tridentate ligands n31 is selected from 1 and 2, n32 is selected from 0, 1, 2, 3, and 4, A 31 to A 34 each independently selected from C 5 -C 30 carbocyclic groups and C 1 -C 30 heterocyclic groups, T 31 to T 34 each independently selected from a single bond, a double bond, *-O-*', *-S-*', *-C(=O)-*', *-S(=O)-*', *-C(R 35 )(R 36 )-*', *-C(R 35 )=C(R 36 )-*', *-C(R 35 )=*', *-Si(R 35 )(R 36 )-*', *-B(R 35 )-*', *-N(R 35 )-*' and *-P(R 35 )-*', k31 to k34 are each independently selected from 1, 2, and 3, Y 31 to Y 34 each independently selected from a single bond, *-O-*', *-S-*', *-C(R 37 )(R 38 )-*', *-Si(R 37 )(R 38 )-*', *-B(R 37 )-*', *-N(R 37 )-*' and *-P(R 37 )-*', * 1 ,* 2 ,* 3 and* 4 Each indicates that 31 The connection site, R 31 to R 38 each 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 hydrazino group, a hydrazono 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 substituted or unsubstituted C 1 -C 60 alkyl group, a substituted or unsubstituted C 2 -C 60 alkenyl group, a substituted or unsubstituted C 2 -C 60 alkynyl group, a substituted or unsubstituted C 1 -C 60 alkoxy group, a substituted or unsubstituted C 3 -C 10 cycloalkyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, a substituted or unsubstituted C 3 -C 10 cycloalkenyl group, a substituted or unsubstituted C 1 -C 10 heterocycloalkenyl group, a substituted or unsubstituted C 6 -C 60 aryl group, a substituted or unsubstituted C 6 -C 60 aryloxy group, a substituted or unsubstituted C 6 -C 60 arylthio group, a substituted or unsubstituted C 1 -C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group, -C(Q 1 )(Q 2 )(Q 3 ), -Si(Q 1 )(Q 2 )(Q 3 ), -B(Q 1 )(Q 2 ), -N(Q 1 )(Q 2 ), -P(Q 1 )(Q 2 ), -C(=O)(Q 1 ), -S(=O)(Q 1 ), -S(=O) 2 (Q 1 ), -P(=O)(Q 1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ), wherein R 31 to R 38 are optionally connected to each other to form a substituted or unsubstituted C 5 -C 60 carbocyclic group or a substituted or unsubstituted C 1 -C 60 heterocyclic group, b31 to b34 are each independently an integer from 0 to 10, Q 1 to Q 3 and 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 hydrazino group, a hydrazono group, C 1 -C 60 alkyl group, C 2 -C 60 alkenyl group, C 2 -C 60 alkynyl group, C 1 -C 60 alkoxy group, C 3 -C 10 cycloalkyl group, 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, C 1 -C 60 heteroaryloxy group, C 1 -C 60 heteroarylthio group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, a biphenyl group and a terphenyl group, and * represents the connection site to an adjacent atom.

3. The organic light-emitting device according to claim 1, wherein the first compound, the second compound, and the third compound substantially do not emit light.

4. The organic light-emitting device according to claim 1, wherein the fourth compound is intended to emit light.

5. The organic light-emitting device according to claim 1, wherein the ratio of the light emission component emitted from the fourth compound to the total light emission component emitted from the emission layer is 80% or greater than 80%.

6. The organic light-emitting device according to claim 1, wherein the fourth compound has a maximum emission wavelength of 420 nm to 490 nm.

7. The organic light-emitting device according to claim 2, wherein the first compound is represented by one of Formula 1-1 to Formula 1-5: wherein, in Formula 1-1 to Formula 1-5, By referring to L provided in Equation 1 11 、a11、A 11 and R 11 to R 19 respectively, understand L 11 、a11、A 11 and R 11 to R 19 。 8. The organic light-emitting device according to claim 7, wherein A 11 is represented by one of Formula 8-1 to Formula 8-5: wherein, in Formula 8-1 to Formula 8-5, X 81 selected from O, S, N(R 89 ), and C(R 89 )(R 90 ), R 81 to R 90 each independently selected from hydrogen, deuterium, C 1 -C 20 alkyl groups, phenyl groups, biphenyl groups, terphenyl groups, fluorenyl groups, carbazolyl groups, dibenzofuranyl groups and dibenzothiophenyl groups, and * represents the connection site to an adjacent atom.

9. The organic light-emitting device according to claim 2, wherein at least one of R 101 to R 103 is selected from the group consisting of the group represented by Formula 11-1, the group represented by Formula 11-2, -C(Q 1 )(Q 2 )(Q 3 ), and -Si(Q 1 )(Q 2 )(Q 3 ) : wherein, in Formula 11-1 and Formula 11-2, Y 111 selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthryl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ), and R 111 to R 114 each independently selected from hydrogen, deuterium, C 1 -C 10 alkyl group, phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthryl group, phenanthryl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ), Q 1 to Q 3 and Q 31 to Q 33 each independently selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthryl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group and a dibenzothiophenyl group, and * represents the connection site to an adjacent atom.

10. The organic light-emitting device according to claim 2, wherein the third compound is represented by Formula 3-1 or Formula 3-2: wherein, in Formula 3-1 and Formula 3-2, X 31 to X 40 each independently selected from N and C.

11. The organic light-emitting device according to claim 1, wherein the fourth compound is represented by Formula 4-1: Formula 4-1 12. The organic light-emitting device according to claim 1, wherein the fourth compound is represented by Formula 4-11 or Formula 4-12: Wherein, In Formula 4-11 and Formula 4-12, R 41a to R 41d 、R 42a to R 42d 、R 43a to R 43c 、R 44a to R 44d 、R 45a 、R 45b and R 46a to R 46c are each understood by referring to the description provided for R in Formula 4 41 as provided.

13. The organic light-emitting device according to claim 1, wherein the first compound is selected from the compounds of Group I below, the second compound is selected from the compounds of Group II below, the third compound is selected from the compounds of Group III-I and Group III-II, and the fourth compound is selected from the compounds of Group IV below; Group I Group II Group III-I Group III-II Group IV where Me represents methyl, iso-Pr represents isopropyl group, tert-Bu represents tert-butyl group, and NMe 2 represents dimethylamino group.

14. The organic light-emitting device according to claim 1, wherein the first electrode is an anode, the second electrode is a cathode, the organic layer includes a hole transport region between the first electrode and the emission layer, and / or an electron transport region between the emission layer and the second electrode, the hole transport region includes a hole injection layer, a hole transport layer, an emission assist layer, an electron blocking layer, or any combination thereof, and the electron transport region includes a hole blocking layer, an electron transport layer, an electron injection layer, or any combination thereof.

15. The organic light-emitting device according to claim 14, wherein the hole blocking layer contains a hole blocking material, and each of the first compound, the second compound, and the hole blocking material satisfies Condition 4 and Condition 5: Condition 4 T 1 (HB)≥T 1 (C1) Condition 5 T 1 (HB)≥T 1 (C2), Wherein, in Condition 4 and Condition 5, T 1 (C1) is the lowest excited triplet energy level of the first compound; T 1 (C2) is the lowest excited triplet energy level of the second compound; T 1 (HB) is the lowest excited triplet energy level of the hole blocking material; and T 1 (C1), T 1 (C2), and T 1 Each of (HB) is an initial value, and the initial value is a measured value.

16. The organic light-emitting device according to claim 14, wherein the hole blocking layer contains a hole blocking material, and each of the first compound, the second compound, and the hole blocking material satisfies Condition 4-1 and Condition 5-1: Condition 4-1 0.3eV > T 1 (HB)-T 1 (C1) ≥ 0eV Condition 5-1 0.3eV > T 1 (HB)-T 1 (C2) ≥ 0eV。 17. The organic light-emitting device according to claim 14, wherein the hole blocking layer contains a hole blocking material, and the hole blocking material is represented by Formula 10: Formula 10 Wherein, in Formula 10, L 101 to L 103 each independently selected from substituted or unsubstituted C 5 -C 30 carbocyclic groups and substituted or unsubstituted C 1 -C 30 heterocyclic groups, a101 to a103 are each independently selected from 0, 1, and 2, and R 101 to R 103 each independently selected from substituted or unsubstituted C 3 -C 10 cycloalkyl group, substituted or unsubstituted C 1 -C 10 heterocycloalkyl group, substituted or unsubstituted C 3 -C 10 cycloalkenyl group, 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 group, 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, -C(Q 1 )(Q 2 )(Q 3 )、-Si(Q 1 )(Q 2 )(Q 3 )、-B(Q 1 )(Q 2 )、-N(Q 1 )(Q 2 )、-P(Q 1 )(Q 2 )、-C(=O)(Q 1 )、-S(=O)(Q 1 )、-S(=O) 2 (Q 1 )、-P(=O)(Q 1 )(Q 2 ) and -P(=S)(Q 1 )(Q 2 ), wherein Q 1 to Q 3 are each independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, a hydroxyl group, a cyano group, a nitro group, an amidino group, a hydrazino group, a hydrazono group, C 1 -C 60 alkyl group, C 2 -C 60 alkenyl group, C 2 -C 60 alkynyl group, C 1 -C 60 alkoxy group, C 3 -C 10 cycloalkyl group, 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, C 1 -C 60 heteroaryloxy group, C 1 -C 60 heteroarylthio group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heteropolycyclic group, a biphenyl group, and a terphenyl group.

18. The organic light-emitting device according to claim 17, wherein at least one of R 101 to R 103 is selected from the group consisting of the group represented by Formula 11-1, the group represented by Formula 11-2, -C(Q 1 )(Q 2 )(Q 3 ), and -Si(Q 1 )(Q 2 )(Q 3 ): Wherein, in Formula 11-1 and Formula 11-2, Y 111 selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthryl group, a phenanthryl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group, a dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ), and R 111 to R 114 each independently selected from hydrogen, deuterium, C 1 -C 10 -alkyl group, phenyl group, biphenyl group, naphthyl group, phenalenyl group, anthracenyl group, phenanthryl group, fluorenyl group, carbazolyl group, dibenzofuranyl group, dibenzothiophenyl group, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ), Q 1 to Q 3 and Q 31 to Q 33 each independently selected from a phenyl group, a biphenyl group, a naphthyl group, a phenalenyl group, an anthracenyl group, a phenanthrenyl group, a fluorenyl group, a carbazolyl group, a dibenzofuranyl group and a dibenzothiophenyl group, and * represents the bonding site to an adjacent atom.

19. The organic light-emitting device according to claim 14, wherein the hole blocking layer contains a hole blocking material, and the hole blocking material is selected from the compounds of Group V: Group V 20. A device, comprising a thin-film transistor including a source electrode, a drain electrode, and an active layer; and the organic light-emitting device according to claim 1, wherein the first electrode of the organic light-emitting device is electrically connected to the source electrode or the drain electrode of the thin-film transistor.

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