Organic light-emitting devices and electronic devices including them

Abstract

An organic light emitting device and an electronic device including the same are provided. The organic light emitting device 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 including a first compound and a second compound, each of the first compound and the second compound is independently a multiple resonance thermally activated delayed fluorescence material, and the first compound and the second compound satisfy Inequality 1, wherein, in Inequality 1, SOI MR1‑MR2 is an integral of spectral overlap of a photoluminescence spectrum of the first compound and an ultraviolet absorption spectrum of the second compound, wherein the integral of spectral overlap is evaluated as described herein.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefits, and all benefits arising therefrom, to Korean Patent Application No. 10-2025-0012636, filed on January 31, 2025, with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to organic light-emitting devices and electronic devices including those thereof. Background Technology

[0004] Organic light-emitting devices (OLEDs) are self-emitting devices with excellent characteristics in terms of viewing angle, response time, brightness, driving voltage, and response speed. In addition, OLEDs can produce full-color images.

[0005] Organic light-emitting devices include an anode, a cathode, and an organic layer located between the anode and cathode, including an emission layer. A hole transport region may be located between the anode and the emission layer, and an electron transport region may be located between the emission layer and the cathode. Holes supplied from the anode can move towards the emission layer through the hole transport region, and electrons supplied from the cathode can move towards the emission layer through the electron transport region. Holes and electrons recombine in the emission layer to generate excitons. When an exciton transitions from an excited state to the ground state, light is emitted. Summary of the Invention

[0006] Provide organic light-emitting devices and electronic devices that include them.

[0007] Additional aspects will be set forth in part in the following detailed description, and will be apparent in part from that detailed description, or may be learned through practice of the exemplary embodiments presented.

[0008] According to one aspect, organic light-emitting devices include:

[0009] First electrode,

[0010] The second electrode, and

[0011] The organic layer located between the first and second electrodes,

[0012] The organic layer includes an emission layer.

[0013] The emission layer includes a first compound and a second compound.

[0014] The first and second compounds are each independently multiple resonance (MLR) thermally activated delayed fluorescence materials, and

[0015] Where the first compound and the second compound satisfy inequality 1:

[0016] Inequality 1

[0017]

[0018] In inequality 1,

[0019] SOI MR1-MR2 It is the spectral overlap integral (J) of the photoluminescence spectrum of the first compound and the ultraviolet absorption spectrum of the second compound, and

[0020] The spectral overlap integral is evaluated using Expression 1:

[0021] Expression 1

[0022]

[0023] In expression 1,

[0024] J is the photoluminescence spectrum of the first compound and the ultraviolet absorption spectrum of the second compound, expressed as M. -1 cm -1 nm 4 The spectral overlap integral is in units of 1.

[0025] The M value of the second compound was calculated from its ultraviolet absorption spectrum. -1 cm -1 The molar extinction coefficient is expressed in units of 1.

[0026] λ is the wavelength in nm of the photoluminescence spectrum and the ultraviolet absorption spectrum.

[0027] It is the photoluminescence spectrum of the first compound normalized to an area of ​​1 and is dimensionless.

[0028] According to another aspect, the electronic device includes the organic light-emitting device. Attached Figure Description

[0029] These and / or other aspects will become clearer and more readily understood from the following detailed description of embodiments considered in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 This is a schematic cross-sectional view of an organic light-emitting device according to one or more embodiments; and

[0031] Figure 2 This is a schematic diagram showing the energy transfer of an organic light-emitting device according to one or more embodiments. Detailed Implementation

[0032] Exemplary embodiments will now be described in further detail, examples of which are illustrated in the accompanying drawings, wherein the same reference numerals refer to the same elements throughout the specification. In this respect, these exemplary embodiments may take different forms and should not be construed as limited to the detailed description set forth herein. Therefore, exemplary embodiments are described only below and by reference to the accompanying drawings to illustrate certain aspects and features. As used herein, the term “and / or” includes any and all combinations of one or more of the associated enumerated items. Expressions such as “at least one of” modify the entire list of elements when preceding or following it, without modifying any individual element of that list.

[0033] The terminology used herein is for the purpose of describing one or more exemplary embodiments only and is not intended to be limiting. As used herein, the singular forms “a” and “the” are also intended to include the plural forms unless the context clearly indicates otherwise. The term “or” means “and / or”. It will be further understood that the terms “comprising” or “including” as used in this specification indicate the presence of the stated features, regions, integrals, steps, operations, elements, and / or components, but do not exclude the presence or addition of one or more additional features, regions, integrals, steps, operations, elements, components, and / or sets thereof.

[0034] It will be understood that although the terms first, second, third, etc., may be used herein to describe various elements, components, regions, layers, and / or portions, these elements, components, regions, layers, and / or portions should not be limited by these terms. These terms are used only to distinguish one element, component, region, layer, or portion from another. Therefore, without departing from the teachings of this embodiment, the first element, component, region, layer, or portion discussed below may be referred to as the second element, component, region, layer, or portion.

[0035] Exemplary embodiments are described herein with reference to cross-sectional views, which are schematic diagrams of idealized embodiments. Thus, deviations from the shapes shown in the figures will be anticipated as a result of, for example, manufacturing techniques and / or tolerances. Therefore, the embodiments described herein should not be construed as limited to the specific shapes of the regions illustrated herein, but rather include deviations in shape caused, for example, by manufacturing processes. For example, regions illustrated or described as flat may typically have rough and / or non-linear characteristics. Furthermore, sharp corners in the figures may be rounded. Therefore, the regions shown in the figures are schematic in nature and their shapes are not intended to illustrate the precise shape of the regions nor to limit the scope of the claims.

[0036] It will be understood that when an element is referred to as being "on" another element, it may be in direct contact with the other element or there may be an intermediate element between them. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element.

[0037] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this general inventive concept pertains. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having meanings consistent with their meanings in the context of this disclosure and the relevant field, and will not be interpreted in an idealized or overly formal sense unless clearly defined herein.

[0038] As used herein, “about” or “approximately” includes the stated value and means within an acceptable range of deviations from the specific value, as determined by a person skilled in the art taking into account the measurement in question and the errors associated with the measurement of the specific quantity (i.e., limitations of the measurement system). For example, “about” may mean within one or more standard deviations relative to the stated value, or within ±30%, 20%, 10%, or 5%.

[0039] Figure 1 Description

[0040] Figure 1 This is a schematic cross-sectional view of an organic light-emitting device 10 according to one or more embodiments. Referring below, reference will be made to... Figure 1 The structure and manufacturing method of an organic light-emitting device according to one or more embodiments are described, but the embodiments are not limited thereto.

[0041] Figure 1 The organic light-emitting device 10 includes a first electrode 11, a second electrode 19 facing the first electrode 11, and an organic layer 15 located between the first electrode 11 and the second electrode 19.

[0042] The organic layer 15 may include an emission layer.

[0043] One aspect of an organic light-emitting device includes: a first electrode,

[0044] The second electrode, and

[0045] The organic layer located between the first electrode and the second electrode,

[0046] The organic layer includes an emission layer.

[0047] The emission layer includes a first compound and a second compound.

[0048] The first and second compounds are each independently multiple resonance thermally activated delayed fluorescence materials.

[0049] Where the first compound and the second compound each satisfy inequality 1:

[0050] Inequality 1

[0051]

[0052] In inequality 1,

[0053] SOI MR1-MR2 It is the spectral overlap integral (J) of the photoluminescence spectrum of the first compound and the ultraviolet (UV) absorption spectrum of the second compound.

[0054] The “spectral overlap integral” is calculated using the following expression 1 from the corresponding data measured by using emission and absorption spectroscopy analysis equipment.

[0055] Expression 1

[0056]

[0057] In Expression 1, J is the photoluminescence spectrum of the first compound and the ultraviolet absorption spectrum of the second compound, expressed as M. -1 cm -1 nm 4 The spectral overlap integral is expressed in units of 1. It is the photoluminescence spectrum of the first compound. It is the photoluminescence spectrum of the first compound normalized to area 1 and is dimensionless, where λ is the wavelength in nm of both the photoluminescence spectrum and the ultraviolet absorption spectrum. The M value of the second compound was calculated from its ultraviolet absorption spectrum. -1 cm -1 The extinction coefficient is expressed in units of molar extinction. The photoluminescence spectrum of the first compound is obtained at room temperature using 10 molar extinction coefficients of the first compound in toluene. -5 The evaluation was performed using solution M, and the UV absorption spectrum of the second compound was obtained at room temperature using 10 μL of the second compound in toluene. -5 Evaluation of solution M.

[0058] According to one or more embodiments, the F-7000 (Hitachi) and Cary 5000 (Agilent Technologies) can be used as luminescence and absorption spectroscopy analysis instruments. The F-7000 (Hitachi) can be used to measure and analyze the photoluminescence spectrum of the first compound. The Cary 5000 (Agilent Technologies) can be used to measure and analyze the ultraviolet absorption spectrum of the second compound.

[0059] Organic light-emitting devices include two types of multiple resonant thermally activated delayed fluorescence materials in the emission layer. Since the two types of multiple resonant thermally activated delayed fluorescence materials satisfy Inequality 1, the energy transfer efficiency in the emission layer is improved, resulting in high color purity, high efficiency, and / or long lifetime.

[0060] According to one or more embodiments, 6.0 x 10 14 M -1 cm -1 nm 4 ≤ SOI MR1-MR2 ≤ 4.0 x 10 15 M -1 cm -1 nm 4 For example, 6.5 x 10 14 M -1 cm -1 nm 4 ≤ SOI MR1-MR2 ≤ 3.0 x 10 15 M -1 cm -1 nm 4 For example, 7.0 x 10 14 M -1 cm -1 nm 4 ≤ SOI MR1-MR2 ≤ 2.0 x 10 15 M -1 cm -1 nm 4 .

[0061] According to one or more embodiments, the first compound and the second compound may be compounds with different structures.

[0062] According to one or more embodiments, the first compound and the second compound can satisfy inequality 2:

[0063] Inequality 2

[0064]

[0065] In inequality 2,

[0066] S1 MR1 It is the singlet state (S1) energy level of the first compound, and S1 MR2 It is the S1 energy level of the second compound.

[0067] The “S1 energy level” can be determined by measuring the photoluminescence spectrum and using the maximum emission wavelength (λ) of the photoluminescence spectrum. 最大 ) or emission start wavelength (λ) 开始 The maximum emission wavelength (λ) is calculated using the following method. 最大 The wavelength corresponding to the point of maximum intensity is:

[0068] S1 energy level = 1240 / maximum emission wavelength (λ) 最大 ),or

[0069] S1 energy level = 1240 / emission start wavelength (λ) 开始 ).

[0070] Alternatively, the S1 level can be calculated using the Gaussian 09 program, which features molecular structure optimization at the B3LYP / 6-31G(d,p) level calculated via density functional theory (DFT).

[0071] Since the organic light-emitting device according to one or more embodiments satisfies Inequality 2, the energy transfer efficiency in the emission layer is improved, resulting in high color purity, high efficiency, and / or long lifetime.

[0072] According to one or more embodiments, the first compound and the second compound can satisfy inequality 3:

[0073] Inequality 3

[0074]

[0075] In inequality 3,

[0076] HOMO MR1 It is the highest occupied molecular orbital (HOMO) energy level of the first compound, and HOMO MR2 It is the HOMO energy level of the second compound.

[0077] The “HOMO level” can be calculated using the Gaussian 09 program, which features molecular structure optimization at the B3LYP / 6-31G(d,p) level calculated via density functional theory (DFT).

[0078] Alternatively, the "HOMO level" can be measured experimentally using cyclic voltammetry (CV), differential pulse voltammetry (DPV), or photoelectron spectroscopy (PES).

[0079] Since the organic light-emitting device according to one or more embodiments satisfies inequality 3, the energy transfer efficiency in the emission layer is improved, resulting in high color purity, high efficiency, and / or long lifetime.

[0080] Organic light-emitting devices according to one or more embodiments can satisfy relations 4-1 and 4-2:

[0081] Relation 4-1

[0082]

[0083] Relation 4-2

[0084]

[0085] Among them, in relations 4-1 and 4-2,

[0086] tau(D) MR1:MR2 It is the exciton lifetime of the combination of the first and second compounds.

[0087] tau(D) MR1 It is the exciton lifetime of the first compound, and

[0088] tau(D) MR2 It is the exciton lifetime of the second compound.

[0089] The "exciton lifetime" can be obtained as follows: For the target compound, a time-dependent emission intensity decay curve is obtained using time-resolved photoluminescence (TRPL) spectroscopy under thin-film conditions, and then measured and calculated using this curve. For example, tau(D) MR1:MR2 It can be measured and calculated from the thin film formed by co-deposition of the first compound and the second compound.

[0090] According to one or more embodiments, a thin film for measuring exciton lifetime can be formed by depositing a target compound on a quartz substrate to a thickness of about 200 Å to about 500 Å. This is used to measure tau(D) in relations 4-1 and 4-2. MR1:MR2 tau(D) MR1 and tau(D) MR2 The films have (essentially) the same thickness.

[0091] According to one or more embodiments, the time-resolved photoluminescence spectroscopy measurement device may be a PicoQuantFluoTime 300.

[0092] Since the organic light-emitting device according to one or more embodiments satisfies relations 4-1 and 4-2, the energy transfer efficiency in the emission layer is improved, resulting in high color purity, high efficiency, and / or long lifetime.

[0093] Organic light-emitting devices according to one or more embodiments can satisfy inequality 5:

[0094] Inequality 5

[0095]

[0096] In inequality 5,

[0097] EC MR2 It is the emission contribution of the second compound.

[0098] The emission contribution of the second compound (or the emission ratio of the second compound) can be defined as the coefficient b in Equation 5-1.

[0099] Equation 5-1

[0100]

[0101] In equation 5-1,

[0102] EL Spectrum A:B OLED is the electroluminescence (EL) spectrum of an organic light-emitting device (OLED) in which a first compound and a second compound serve as emitters in the emitting layer.

[0103] EL spectrum A is the EL spectrum of an OLED device in which a first compound is included as an emitter in the emitter layer, and

[0104] EL spectrum B is the EL spectrum of an OLED device that includes a second compound as an emitter in the emitter layer.

[0105] These can be used for the analysis of electro-optic properties using current-voltage-luminance measurement equipment based on 1,000 nits (cd / m²). 2 The EL spectrum under ( ) is calculated using the ratio method.

[0106] For example, an OLED device used in luminescence ratio measurement may have a stacked structure of ITO (1,500 Å) / HAT-CN (100 Å) / NPB (500 Å) / TCTA (50 Å) / mCP (50 Å) / first host (HT1), second host (HT2) (50:50 weight ratio) and emitter (about 1.5 wt% to about 3 wt%) / DBFPO (100 Å) / DBFPO and LiQ (5:5 weight ratio) (300 Å) / LiQ (10 Å) / Al (1,000 Å). When measuring the EL spectrum of an A:B OLED and thus using both the first and second compounds, for example, "emitter (3 wt%)" means that the first and second compounds are each used at 3 wt%, based on the total weight of the host and emitter (including the first and second compounds).

[0107] Since the organic light-emitting device according to one or more embodiments satisfies inequality 5, the energy transfer efficiency in the emission layer is improved, resulting in high color purity, high efficiency, and / or long lifetime.

[0108] According to one or more embodiments, the multiple resonance thermally activated delayed fluorescence material can be a compound represented by Formula 1:

[0109] Formula 1

[0110]

[0111] In Equation 1,

[0112] X1 can be B or N.

[0113] CY1 to CY3 can each be independently classified as C5-C. 30 Carbocyclic groups or C1-C 30 Heterocyclic groups,

[0114] Y1 can be a single bond, *-N(R1)-*', *-B(R1)-*', *-P(R1)-*', *-C(R1)(R2)-*', *-Si(R1)(R2)-*', *-Ge(R1)(R2)-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*'.

[0115] Y2 can be a single bond, *-N(R3)-*', *-B(R3)-*', *-P(R3)-*', *-C(R3)(R4)-*', *-Si(R3)(R4)-*', *-Ge(R3)(R4)-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*'.

[0116] Y3 can be a single bond, *-N(R5)-*', *-B(R5)-*', *-P(R5)-*', *-C(R5)(R6)-*', *-Si(R5)(R6)-*', *-Ge(R5)(R6)-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*'.

[0117] k1 to k3 can each be 0 or 1 independently (for example, at least one of k1 to k3 can be non-zero; for example, one of k1 to k3 can be 0, and the remaining two of k1 to k3 can be 1).

[0118] When k1 is 0, Y1 does not exist; when k2 is 0, Y2 does not exist; when k3 is 0, Y3 does not exist.

[0119] R1 to R6, R 10 R 20 and R 30 Each group can independently be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heterocyclic groups, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2),

[0120] b10, b20, and b30 can each be an integer from 0 to 20 independently.

[0121] Adjacent R1 to R6, R 10 R 20 and R 30Two or more may optionally combine with each other to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0122] Two or more R 10 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0123] Two or more R 20 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0124] Two or more R 30 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0125] * and *' each represent the binding site with the adjacent atom.

[0126] Replacement C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkyne group, substituted C1-C 60 Alkoxy, substituted C1-C 60 Alkylthio, substituted C3-C 10 cycloalkyl, substituted C1-C 10 Heterocyclic alkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocyclic alkenyl, substituted C6-C 60 Aryl, substituted C7-C 60 Alkyl aryl, substituted C7-C 60 Arylalkyl, substituted C6-C 60 aryloxy groups, substituted C6-C 60 Arylthioyl, substituted C1-C 60 heteroaryl, substituted C2-C 60 Alkyl heteroaryl, substituted C2-C 60 Heteroarylalkyl, substituted C1-C 60 Heteroaryl groups, substituted C1-C60 At least one substituent of the heteroaryl thio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused heterocyclic group may be:

[0127] Deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 Alkyne group, C1-C 60 alkoxy, or C1-C 60 Alkylthio;

[0128] Each of the following C1-C is replaced: 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -Si(Q) 11 (Q) 12 (Q) 13 -Ge(Q) 11 (Q) 12 (Q) 13 -B(Q) 11 (Q) 12 -N(Q) 11 (Q) 12 -P(Q) 11 (Q)12 -C(=O)(Q) 11 -S(=O)(Q) 11 -S(=O)2(Q) 11 -P(=O)(Q) 11 (Q) 12 -P(=S)(Q) 11 (Q) 12 ), or combinations thereof;

[0129] C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups,

[0130] Each of the following C3-C is replaced: 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid groups or their salts, sulfonic acid groups or their salts, phosphate groups or their salts, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -Si(Q) 21 (Q) 22 (Q) 23 -Ge(Q) 21 (Q) 22 (Q) 23 -B(Q) 21 (Q) 22 -N(Q) 21 (Q) 22 -P(Q) 21 (Q) 22 -C(=O)(Q) 21 -S(=O)(Q) 21 -S(=O)2(Q) 21 -P(=O)(Q) 21 (Q) 22 -P(=S)(Q) 21 (Q) 22 ), or a combination thereof; or

[0131] -Si(Q 31 (Q) 32 (Q) 33 -Ge(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 ), or -P(=S)(Q 31 (Q) 32 ),and

[0132] Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each group can independently be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, or substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups,

[0133] Alternatively, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each can be independently:

[0134] Hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, or phosphate group or its salt, or

[0135] Each of the following C1-Cs was not replaced or was replaced as follows 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 60 Carbocyclic groups, or C1-C 60 Heterocyclic groups: deuterium, -F, cyano, C1-C 60 Alkyl, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 60 Carbocyclic groups, C1-C 60 Heterocyclic groups, or combinations thereof.

[0136] According to one or more embodiments, rings CY1 to CY3 may each independently be i) a first ring, ii) a second ring, iii) a fused ring group in which two or more first rings are fused together, iv) a fused ring group in which two or more second rings are fused together, or v) a fused ring group in which one or more first rings and one or more second rings are fused together.

[0137] The first ring can be a cyclopentyl group, a cyclopentadienyl group, a furan group, a thiophene group, a pyrrole group, a thiophene group, an indole group, a benzofuran group, a benzothiophene group, an indole group, or a benzothiophene group. azole group, iso- azole group, diazole group, isodiazole group diazole group, Triazole group, iso Triazole group, thiazole group, isothiazole group, thiadiazole group, isothiazole group, thiatriazole group, isothiazole group, pyrazole group, imidazole group, triazole group, tetraazole group, azathiophene group, diazathiophene group, or triazathiophene group, and

[0138] The second ring may be an adamantyl group, norbornene group, bicyclo[1.1.1]pentyl group, bicyclo[2.1.1]hexyl group, bicyclo[2.2.1]heptane (norbornene) group, bicyclo[2.2.2]octyl group, cyclohexyl group, cyclohexene group, phenyl group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, or triazine group.

[0139] According to one or more embodiments, rings CY1 to CY3 can each be independently C6-C. 30 Aromatic carbocyclic groups or C1-C 30 Aromatic heterocyclic groups.

[0140] According to one or more embodiments, cyclic CY1 to cyclic CY3 may each independently be a phenyl group, a naphthyl group, an anthracene group, a phenanthrene group, a benzo[9,10]phenanthrene group, a pyrene group, etc. Group, 1,2,3,4-tetrahydronaphthalene group, Benzothiophene group, benzofuran group, indole group, indene group, benzothiophene group, benzoborane heterocyclopentadien group, benzophosphonocyclopentadien group, benzoselenophene group, benzogermanium heterocyclopentadien group, dibenzothiophene group, dibenzofuran group, carbazole group, fluorene group, dibenzothiophene group, dibenzoborane heterocyclopentadien group, dibenzophosphonocyclopentadien group, dibenzoselenophene group, dibenzogermanium heterocyclopentadien group, dibenzothiophene 5-oxide group, 9H-fluorene-9-one group, dibenzothiophene 5,5-dioxide group, azabenzothiophene group, azabenzofuran group, azaindole group, azaindene group, azabenzothiophene group, azabenzoborane heterocyclopentadien group, azabenzophosphonocyclopentadien group, azabenzoselenophene group, azabenzothiophene group, azabenzothiophene group Azadibenzothiophene group, azadibenzofuran group, azacarbazole group, azafluorene group, azadibenzothiophene group, azadibenzoborone cyclopentadiene group, azadibenzophosphazene cyclopentadiene group, azadibenzoselenophene group, azadibenzogermonone cyclopentadiene group, azadibenzothiophene 5-oxide group, aza-9H-fluorene-9-one group, azadibenzothiophene 5,5-dioxide group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, quinoxaline group, quinazolinine group, phenanthrene group, 5,6,7,8-tetrahydroisoquinoline group, 5,6,7,8-tetrahydroquinoline group, adamantyl group, norbornel group, norbornene group, or groups represented by Formula 2:

[0141] Formula 2

[0142]

[0143] In Equation 2,

[0144] X2 can be B or N.

[0145] Rings CY4 to CY6 can each be independently C5-C. 30 Carbocyclic groups or C1-C 30 Heterocyclic groups,

[0146] Y4 can be a single bond, *-N(R) 71)-*'、*-B(R 71 )-*'、*-P(R 71 )-*'、*-C(R 71 (R) 72 )-*'、*-Si(R 71 (R) 72 )-*'、*-Ge(R 71 (R) 72 )-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*',

[0147] Y5 can be a single bond, *-N(R) 73 )-*'、*-B(R 73 )-*'、*-P(R 73 )-*'、*-C(R 73 (R) 74 )-*'、*-Si(R 73 (R) 74 )-*'、*-Ge(R 73 (R) 74 )-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*',

[0148] Y6 can be a single bond, *-N(R) 75 )-*'、*-B(R 75 )-*'、*-P(R 75 )-*'、*-C(R 75 (R) 76 )-*'、*-Si(R 75 (R) 76 )-*'、*-Ge(R 75 (R) 76 )-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*',

[0149] k4 to k6 can each be 0 or 1 independently (for example, at least one of k4 to k6 can be non-zero; for example, one of k4 to k6 can be 0, and the remaining two of k4 to k6 can be 1).

[0150] When k4 is 0, Y4 does not exist; when k5 is 0, Y5 does not exist; when k6 is 0, Y6 does not exist.

[0151] R 40 R 50 R 60 and R 71 To R76 The descriptions are independent of R. 10 The descriptions are the same.

[0152] b40, b50, and b60 are each independent integers from 0 to 20.

[0153] Adjacent R 40 R 50 R 60 and R 71 To R 76 Two or more may optionally combine with each other to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0154] Two or more R 40 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0155] Two or more R 50 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0156] Two or more R 60 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, and

[0157] * and *' each represent a binding site with an adjacent atom.

[0158] It will be understood that when any one or more of rings CY1 to CY3 are groups represented by Formula 2, the groups represented by Formula 2 can be fused with Formula 1 via any one of rings CY4 to CY6. For example, when ring CY3 is a group represented by Formula 2, the groups represented by Formula 2 can be fused with Formula 1 via any one of rings CY4 to CY6. For example, when ring CY3 is a group represented by Formula 2 and the groups represented by Formula 2 are fused with Formula 1 via ring CY4, ring CY4 is simultaneously fused with the rings containing X1 and Y2 and the rings containing X1 and Y3 in Formula 1. Such a structure can be seen in compound 3 as described herein. The same principle applies to the rest.

[0159] According to one or more embodiments, rings CY1 to CY3 may each independently be a phenyl group, a naphthyl group, a phenanthrene group, a fluorene group, a pyridine group, a pyrimidine group, a quinoline group, an isoquinoline group, a phthalazine group, a naphthidine group, a quinoxaline group, a quinazoline group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, a dibenzothiophene group, a dibenzothiophene group, a dibenzoborone heterocyclopentadiene group, a dibenzophosphonone heterocyclopentadiene group, a dibenzoselenophene group, a dibenzogermanone heterocyclopentadiene group, a dibenzothiophene 5-oxide group, a 9H-fluorene-9-one group, a dibenzothiophene 5,5-dioxide group, or a group represented by Formula 2.

[0160] According to one or more embodiments, rings CY1 to CY3 may each be independently a phenyl group, a naphthol group, a phenanthrene group, a fluorene group, a pyridine group, a pyrimidine group, a quinoline group, an isoquinoline group, an phthalazine group, a naphthidine group, a quinoxaline group, a quinazoline group, a carbazole group, a dibenzofuran group, a dibenzothiophene group, a dibenzothiophene group, or a group represented by Formula 2.

[0161] According to one or more embodiments, cyclic CY4 to cyclic CY6 may each be independently a phenyl group, a naphthol group, a phenanthrene group, a pyridine group, a pyrimidine group, a quinoline group, an isoquinoline group, an phthalazine group, a naphthidine group, a quinoxaline group, or a quinazolinine group.

[0162] R1 to R6 and R in Equations 1 and 2 10 R 20 R 30 R 40 R 50 R 60 and R 71 To R 76 Each group can independently be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, -N(Q1)(Q2), -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -B(Q1)(Q2), -P(Q1)(Q2), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2).

[0163] According to one or more implementation methods, R1 to R6, R 10 R 20 R 30 R 40 R 50 R 60 and R 71 To R 76 Each can be independently:

[0164] Hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthio;

[0165] Each of the following C1-C is replaced: 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, deuterated C1-C 20 Alkyl, fluorinated C1-C 20Alkyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl (norbornenyl), bicyclo[2.2.2]octyl, (C1-C 20 alkyl)cyclopentyl, (C1-C 20 alkyl)cyclohexyl, (C1-C 20 alkyl)cycloheptyl, (C1-C 20 alkyl)cyclooctyl, (C1-C 20 Alkyl) adamantyl, (C1-C 20 alkyl) norbornenyl, (C1-C 20 alkyl)cyclopentenyl, (C1-C 20 alkyl)cyclohexenyl, (C1-C 20 alkyl)cycloheptenyl, (C1-C 20 Alkyl)bicyclo[1.1.1]pentyl, (C1-C 20 Alkyl)bicyclo[2.1.1]hexyl, (C1-C 20 Alkyl)bicyclo[2.2.1]heptyl, (C1-C 20 Alkyl)bicyclo[2.2.2]octyl, silylcyclopentyl, phenyl, (C1-C 20 Alkyl)phenyl, biphenyl, terphenyl, naphthyl, 1,2,3,4-tetrahydronaphthyl, pyridyl, pyrimidinyl, or combinations thereof;

[0166] Each of the following substituted compounds, either unsubstituted or substituted with: cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, silanecyclopentyl, phenyl, (C1-C 20 Alkyl)phenyl, biphenyl, terphenyl, naphthyl, 1,2,3,4-tetrahydronaphthyl, fluorenyl, phenanthryl, anthracene, fluoranyl, benzo[9,10]phenanthryl, pyrene, alkyl, pyrroleyl, thiophenyl, furanyl, imidazoleyl, pyrazolyl, thiazolyl, isothiazolyl, azole group, iso Azolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazole, purine, quinolinyl, isoquinolinyl, benzoquinolinyl, quinoxalinyl, quinazolinyl, cyclophosphinyl, carbazole, phenanthrolinel, benzimidazolyl, benzofuranyl, benzothiophene, benzoisothiazolyl, benzo[] azole group, benzo[a] Azolyl, triazolyl, tetrazolyl, Diazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazoyl, dibenzocarbazoyl, imidazopyridyl, imidazopyrimidinyl, azacarbazoyl, azadibenzofuranyl, or azadibenzothiophenyl: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amido, hydrazyl, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, deuterated C1-C 20 Alkyl, fluorinated C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, (C1-C 20 alkyl)cyclopentyl, (C1-C 20 alkyl)cyclohexyl, (C1-C 20 alkyl)cycloheptyl, (C1-C 20 alkyl)cyclooctyl, (C1-C 20 Alkyl) adamantyl, (C1-C 20 alkyl) norbornenyl, (C1-C 20 alkyl)cyclopentenyl, (C1-C 20 alkyl)cyclohexenyl, (C1-C 20 alkyl)cycloheptenyl, (C1-C 20 Alkyl)bicyclo[1.1.1]pentyl, (C1-C 20 Alkyl)bicyclo[2.1.1]hexyl, (C1-C 20 Alkyl)bicyclo[2.2.1]heptyl, (C1-C 20 Alkyl)bicyclo[2.2.2]octyl, silylcyclopentyl, phenyl, (C1-C 20 Alkyl)phenyl, biphenyl, terphenyl, naphthyl, 1,2,3,4-tetrahydronaphthyl, fluorenyl, phenanthryl, anthracene, fluoranyl, benzo[9,10]phenanthryl, pyrene, alkyl, pyrroleyl, thiophenyl, furanyl, imidazoleyl, pyrazolyl, thiazolyl, isothiazolyl, azole group, iso Azolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazole, purine, quinolinyl, isoquinolinyl, benzoquinolinyl, quinoxalinyl, quinazolinyl, cyclophosphinyl, carbazole, phenanthrolinel, benzimidazolyl, benzofuranyl, benzothiophene, benzoisothiazolyl, benzo[] azole group, benzo[a] Azolyl, triazolyl, tetrazolyl, Diazolyl, triazine, dibenzofuranyl, dibenzothiophenyl, benzocarbazole, dibenzocarbazole, imidazopyridyl, imidazopyrimidinyl, azacarbazole, azadibenzofuranyl, azadibenzothiophenyl, or combinations thereof; or

[0167] -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P( Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2).

[0168] According to one or more implementation methods, R1 to R6, R 10 R 20 R 30 R 40 R 50 R 60 and R 71 To R 76 Each can be independently:

[0169] Hydrogen, Deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, Cl-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio; or

[0170] Groups represented by any one of formulas 9-1 to 9-61, 9-201 to 9-244, 10-1 to 10-154, or 10-201 to 10-350:

[0171]

[0172]

[0173]

[0174]

[0175]

[0176]

[0177]

[0178]

[0179]

[0180]

[0181]

[0182]

[0183]

[0184]

[0185]

[0186]

[0187]

[0188]

[0189]

[0190]

[0191]

[0192]

[0193] In formulas 9-1 to 9-61, 9-201 to 9-244, 10-1 to 10-154, and 10-201 to 10-350, * indicates a binding site with an adjacent atom, “Ph” represents phenyl, “TMS” represents trimethylsilyl, and “TMG” represents trimethylgermanyl.

[0194] In Equations 1 and 2, b10, b20, b30, b40, b50, and b60 can each be an integer from 0 to 20 independently.

[0195] According to one or more implementation methods, b10, b20, b30, b40, b50 and b60 can each be independently 1, 2, 3, 4, 5, 6, 7 or 8.

[0196] According to one or more implementation methods, b10, b20, b30, b40, b50 and b60 can each be 1, 2, 3 or 4 independently.

[0197] In equations 1 and 2, two or more R 10 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0198] Two or more R 20 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0199] Two or more R 30 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0200] Two or more R 40 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0201] Two or more R 50 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups,

[0202] Two or more R 60 They can be optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, and

[0203] Adjacent R1 to R6, R 10 R 20 R 30 R 40 R 50 R 60 、or R 71 To R 76 Two or more of them may optionally be combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups.

[0204] According to one or more implementation methods, two or more R 10 Two or more R20 Two or more R 30 Two or more R 40 Two or more R 50 Two or more R 60 ; and / or adjacent R1 to R6, R 10 R 20 R 30 R 40 R 50 R 60 、or R 71 To R 76 Two or more may optionally be linked to each other via single bonds, double bonds, or a first linking group to form an unsubstituted or linked group with at least one R 10a Replacement C5-C 30 The carbocyclic group is either unsubstituted or replaced by at least one R 10a Replacement C1-C 30 Heterocyclic groups (e.g., each unsubstituted or with at least one R) 10a Substituted fluorene groups, (Tonyl group, acridine group, etc.). R 10a With regard to R in this article 10 The description is the same. C5-C 30 Carbocyclic groups and C1-C 30 The heterocyclic groups are all the same as those described in this article.

[0205] According to one or more embodiments, "not replaced or by at least one R" 10a Replacement C5-C 30 The carbocyclic group is either unsubstituted or replaced by at least one R 10a Replacement C1-C 30 Non-limiting examples of "heterocyclic groups" include those that are not substituted or are substituted with at least one R. 10a Substituted phenyl groups, naphthyl groups, cyclopentyl groups, cyclopentadienyl groups, cyclohexyl groups, cycloheptyl groups, bicyclic [2.2.1]heptyl groups, furan groups, thiophene groups, pyrrole groups, thiophene groups, indole groups, benzofuran groups, benzothiophene groups, indole groups, benzothiophene groups, etc. R 10a With regard to R in this article 10 The description is the same.

[0206] The first linker group can be *-N(R8)-*', *-B(R8)-*', *-P(R8)-*', *-C(R8)(R9)-*', *-Si(R8)(R9)-*', *-Ge(R8)(R9)-*', *-S-*', *-Se-*', *-O-*', *-C(=O)-*', *-S(=O)-*', *-S(=O)2-*', *-C(R8)=*', *=C(R8)-*', *-C(R8)=C(R9)-*', *-C(=S)-*', or *-C≡C-*', where R8 and R9 are the same as those mentioned in this paper regarding R. 10 The descriptions are identical, and * and *' each represent a binding site with an adjacent atom.

[0207] According to one or more implementation methods, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 , and Q 31 To Q 33 Each can be independently:

[0208] Deuterium, -CH3, -CD3, -CD2H, -CDH2, -CH2CH3, -CH2CD3, -CH2CD2H, -CH2CDH2, -CHDCH3, -CHDCD2H, -CHDCDH2, -CHDCD3, -CD2CD3, -CD2CD2H, or -CD2CDH2;

[0209] n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, sec-pentyl, tert-pentyl, phenyl, or naphthyl; or

[0210] Each of the following is replaced by n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, sec-pentyl, tert-pentyl, phenyl, or naphthyl: deuterium, C1-C 10 Alkyl, phenyl, or combinations thereof.

[0211] According to one or more embodiments, a multiple resonant thermally activated delayed fluorescence material may include at least one boron atom.

[0212] According to one or more embodiments, the first compound may include at least one boron atom.

[0213] According to one or more embodiments, the first compound may include one, two, or three boron atoms.

[0214] According to one or more embodiments, the second compound may include at least one boron atom.

[0215] According to one or more embodiments, the second compound may include one, two, or three boron atoms.

[0216] According to one or more embodiments, the number of boron atoms included in the first compound may be the same as or different from the number of boron atoms included in the second compound.

[0217] As used in this article, the alternative C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkyne group, substituted C1-C 60 Alkoxy, substituted C1-C 60 Alkylthio, substituted C3-C 10 cycloalkyl, substituted C1-C 10 Heterocyclic alkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocyclic alkenyl, substituted C6-C 60 Aryl, substituted C7-C 60 Alkyl aryl, substituted C7-C 60 Arylalkyl, substituted C6-C 60 aryloxy groups, substituted C6-C 60 Arylthioyl, substituted C1-C 60 heteroaryl, substituted C2-C 60 Alkyl heteroaryl, substituted C2-C 60 Heteroarylalkyl, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 At least one substituent of the heteroaryl thio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused heterocyclic group may be:

[0218] Deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio,

[0219] Each of the following C1-C is replaced: 60 Alkyl, C2-C 60alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -N(Q) 11 (Q) 12 ), -Si(Q 11 (Q) 12 (Q) 13 -Ge(Q) 11 (Q) 12 (Q) 13 -C(=O)(Q) 11 -S(=O)(Q) 11 -S(=O)2(Q) 11 -B(Q) 11 (Q) 12 -P(Q) 11 (Q) 12 -P(=O)(Q) 11 (Q) 12 -P(=S)(Q) 11 (Q) 12 ), or combinations thereof;

[0220] Each of the following C3-Cs was not replaced or was replaced as follows 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid groups or their salts, sulfonic acid groups or their salts, phosphate groups or their salts, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 aryloxy group, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -N(Q) 21 (Q) 22 ), -Si(Q 21 (Q) 22 (Q) 23 -Ge(Q) 21 (Q) 22 (Q) 23 -C(=O)(Q) 21 -S(=O)(Q) 21 -S(=O)2(Q) 21 -B(Q) 21 (Q) 22 -P(Q) 21 (Q) 22 -P(=O)(Q) 21 (Q) 22 -P(=S)(Q) 21 (Q) 22), or combinations thereof;

[0221] -N(Q 31 (Q) 32 ), -Si(Q 31 (Q) 32 (Q) 33 -Ge(Q) 31 (Q) 32 (Q) 33 -C(=O)(Q) 31 -S(=O)(Q) 31 -S(=O)2(Q) 31 -B(Q) 31 (Q) 32 -P(Q) 31 (Q) 32 -P(=O)(Q) 31 (Q) 32 ), or -P(Q 31 (Q) 32 );or

[0222] Its combination.

[0223] As used herein, unless otherwise specifically stated, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each group can independently be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, or substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

[0224] In some implementations, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each can be independently:

[0225] Hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, or phosphate group or its salt; or

[0226] Each of the following C1-Cs was not replaced or was replaced as follows 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, C1-C 60 Alkyl, C6-C 60 Aryl, C1-C60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, or combinations thereof.

[0227] For example, in some implementations, Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each can be independently:

[0228] -CH3, -CD3, -CD2H, -CDH2, -CH2CH3, -CH2CD3, -CH2CD2H, -CH2CDH2, -CHDCH3, -CHDCD2H, -CHDCDH2, -CHDCD3, -CD2CD3, -CD2CD2H, or -CD2CDH2; or

[0229] Each of the following is either unsubstituted or substituted with: n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, phenyl, biphenyl, or naphthyl: deuterium, C1-C 10 Alkyl, phenyl, or combinations thereof.

[0230] According to one or more embodiments, the multiple resonance thermally activated delayed fluorescence material may be one of compounds 1 to 4:

[0231]

[0232] .

[0233] According to one or more embodiments, the half-width at half-maximum (FWHM) of the emission peak in the emission spectrum or electroluminescence spectrum of the multiple resonance thermally activated delayed fluorescence material can be about 50 nm or less. For example, the FWHM of the emission peak in the emission spectrum or electroluminescence spectrum of the multiple resonance thermally activated delayed fluorescence material can be about 5 nm to about 40 nm, about 7 nm to about 35 nm, or about 10 nm to about 30 nm.

[0234] According to one or more embodiments, the first compound may act as a dopant (e.g., a sensitizer) in the emitter layer.

[0235] According to one or more embodiments, the second compound may act as a dopant (e.g., an emitter) in the emitter layer.

[0236] According to one or more embodiments, the emission layer may further include a body (i.e., the total amount of the first compound and the second compound in the emission layer may be less than the amount of the body based on weight).

[0237] According to one or more embodiments, the emitting layer can emit blue light. For example, the emitting layer can emit blue light with a maximum emission wavelength of about 410 nanometers (nm) to about 490 nm.

[0238] According to one or more embodiments, the emitting layer can emit deep blue light having a maximum emission wavelength of about 410 nm to about 450 nm. For example, the emitting layer can emit deep blue light having a maximum emission wavelength of about 410 nm to about 445 nm.

[0239] As used herein, “(emitting layer) includes at least one first compound” can be interpreted as “(emitting layer) may include one compound belonging to the class of the first compound or two or more different compounds belonging to the class of the first compound.”

[0240] As used herein, “(emitting layer) includes at least one second compound” can be interpreted as “(emitting layer) may include one compound belonging to the class of second compounds or two or more different compounds belonging to the class of second compounds.”

[0241] For example, the emitter layer may consist of only compound 1 as the first compound. In some embodiments, the emitter layer may include compound 1 and another compound of the same class as the first compound.

[0242] For example, the emitter layer may consist solely of compound 2 as the second compound. In some embodiments, the emitter layer may include compound 2 and another compound of the same class as the second compound.

[0243] According to one or more embodiments, the main body may include an electronic transmission main body that includes at least one electronic transmission portion and a hole transmission main body that does not include an electronic transmission portion.

[0244] According to one or more embodiments, the electron transport entity may include the compound represented by formula E-1 described herein.

[0245] According to one or more embodiments, the hole transport subject may include the compound represented by formula H-1 described herein.

[0246] According to one or more embodiments, the amount of hole transport entities in the emitter layer may be greater than or equal to the amount of electron transport entities in the emitter layer, based on weight.

[0247] According to one or more embodiments, based on weight, the amount of the main body in the emitter layer may be greater than the total amount of the first compound and the second compound in the emitter layer.

[0248] According to one or more embodiments, the amount of the first compound in the emitter layer may be greater than or equal to the amount of the second compound in the emitter layer, based on weight.

[0249] According to one or more embodiments, the emitter layer may not include metal.

[0250] According to one or more embodiments, the organic layer may further include a hole transport region located between the first electrode and the emitter layer; and an electron transport region located between the emitter layer and the second electrode.

[0251] The hole transport region includes at least one of a hole injection layer, a hole transport layer, or an electron blocking layer, and

[0252] The electron transport region includes at least one of a hole blocking layer, an electron transport layer, or an electron injection layer.

[0253] At least one of the hole transport region and the electron transport region may include an organometallic compound.

[0254] The detailed description of organic light-emitting devices described herein includes (including) further descriptions provided herein.

[0255] According to one or more embodiments, as described herein, an electronic device including the organic light-emitting device is also provided.

[0256] emission layer

[0257] The thickness of the emitting layer can be from about 100 Å to about 1,000 Å, for example from about 200 Å to about 600 Å. When the thickness of the emitting layer is within the range described above, excellent light emission characteristics can be obtained without a significant increase in driving voltage.

[0258] According to one or more embodiments, the main body may not include metal atoms.

[0259] According to one or more embodiments, the main body may include at least one compound selected from the following: a compound containing fluorene, a compound containing carbazole, a compound containing dibenzofuran, a compound containing dibenzothiophene, a compound containing indobenzocarbazole, a compound containing indolecarbazole, a compound containing benzofuran-carbazole, a compound containing benzothiophene-carbazole, a compound containing acridine, a compound containing dihydroacrylidine, a compound containing triindobenzobenzene, a compound containing pyridine, a compound containing pyrimidine, a compound containing triazine, a compound containing silicon, a compound containing cyano, a compound containing phosphine oxide, a compound containing sulfoxide, or a compound containing sulfonyl.

[0260] For example, the main body may be a compound comprising at least one carbazole ring and at least one cyano group, or a compound containing phosphine oxide.

[0261] According to one or more embodiments, the body may consist of one type of body. When the body includes one type of body, said one type of body may be a bipolar body, an electron transport body, or a hole transport body, which will be described herein.

[0262] According to one or more embodiments, the subject may be a mixture of two or more different subjects. For example, the subject may be a mixture of an electron transport subject and a hole transport subject, a mixture of two different types of electron transport subjects, or a mixture of two different types of hole transport subjects. The electron transport subject and the hole transport subject can be understood by referring to the relevant descriptions presented herein.

[0263] According to one or more embodiments, the main body may include an electronic transmission main body that includes at least one electronic transmission portion and a hole transmission main body that does not include an electronic transmission portion.

[0264] The electron transport moiety used in this article may be a cyano group, a cyclic group containing nitrogen lacking π electrons, or a group represented by one of the following formulas:

[0265]

[0266] In the above formula, *, *', and *" each represent a binding site with an adjacent atom.

[0267] According to one or more embodiments, the electron transport host in the emitter layer may contain at least one cyano group or a cyclic group containing nitrogen that is π-deficient.

[0268] According to one or more embodiments, the electron transport host in the emitter layer may include at least one cyano group.

[0269] According to one or more embodiments, the electron transport host in the emitter layer may contain at least one cyano group and at least one cyclic group containing nitrogen lacking π electrons.

[0270] According to one or more embodiments, the main body includes an electron transport body and a hole transport body, wherein the electron transport body may contain at least one cyclic group of nitrogen without π electrons and at least one electron transport portion, and the hole transport body may contain at least one cyclic group of nitrogen without π electrons and may not contain an electron transport portion.

[0271] As used herein, the term "cyclic group containing π-electron-deficient nitrogen" refers to a cyclic group having at least one *-N=*' moiety, and may be, for example, an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, etc. azole group, iso- Azolium group, pyridine group, pyrazine group, pyridazine group, pyrimidine group, indazole group, purine group, quinoline group, isoquinoline group, benzo[a]quinoline group, phthalazine group, naphthidine group, quinoxaline group, quinazoline group, cyclophosphine group, phenanthridine group, acridine group, phenanthrene-rhein group, phenazine group, benzimidazole group, benzisothiazole group, benzo[a] azole group, benzene azole group, triazole group, tetraazole group The following groups are used: diazole group, triazine group, thiadiazole group, imidazopyridine group, imidazopyrimidine group, azacarbazole group; or fused ring groups consisting of two or more of the above-mentioned cyclic groups containing π-electron-deficient nitrogen atoms fused together, but the embodiments are not limited thereto.

[0272] Meanwhile, cyclic groups containing nitrogen lacking π electrons can be phenyl groups, heptalene groups, indene groups, naphthyl groups, etc. Group, indole group, acenaphthene group, fluorene group, spirodifluorene group, benzo[9,10]fluorene group, dibenzo[9,10]fluorene group, phenanthracene group, anthracene group, fluoranthracene group, benzo[9,10]phenanthracene group, pyrene group, Group, tetraphenyl group, Groups, Groups, pentaphenyl groups, hexaphenyl groups, pentaphenyl groups, rutin groups, halophenyl groups, ovalphenyl groups, pyrrole groups, isoindole groups, indole groups, furan groups, thiophene groups, benzofuran groups, benzothiophene groups, benzocarbazole groups, dibenzocarbazole groups, dibenzofuran groups, dibenzothiophene groups, dibenzothiophene sulfone groups, carbazole groups, dibenzothiorrole groups, indolecarbazole groups, indolecarbazole groups, benzofuran-carbazole groups, benzothiophene-carbazole groups, triindole-phenyl groups, or fused ring groups of two or more of the above-mentioned cyclic groups that do not contain π-electron-deficient nitrogen, but the embodiments are not limited thereto.

[0273] In one or more embodiments, the electron transport body may comprise at least one of: i) a cyano group, a pyrimidine group, a pyrazine group, or a triazine group, and ii) at least one of a benzo[9,10]phenanthrene group or a carbazole group.

[0274] In one or more embodiments, the hole transporter may contain at least one carbazole group.

[0275] In one or more embodiments,

[0276] The electron transport host may include a compound represented by formula E-1.

[0277] Hole transport agents may include compounds represented by formula H-1, or

[0278] Its combination:

[0279] E-1

[0280]

[0281] In E-1,

[0282] Ar 301 It can be either not replaced or replaced by at least one R 301a Replacement C5-C 60 The carbocyclic group is either unsubstituted or replaced by at least one R 301a Replacement C1-C 60 Heterocyclic groups,

[0283] xb11 can be 1, 2, or 3.

[0284] L 301 Each can be an independent single bond, unsubstituted, or bound by at least one R. 301a Replacement C5-C 60 Carbocyclic groups, unsubstituted or with at least one R 301a Replacement C1-C 60 Heterocyclic groups, or groups represented by one of the following formulas, where *, *', and *" in the formula each represent a binding site with an adjacent atom.

[0285]

[0286] xb1 can be an integer from 1 to 5.

[0287] R 301a and R 301 Each group can independently be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, -Si(Q 301 (Q) 302 (Q) 303 -N(Q) 301 (Q) 302 -B(Q) 301 (Q) 302 -C(=O)(Q) 301 -S(=O)2(Q) 301 -S(=O)(Q) 301 -P(Q) 301 (Q) 302 -P(=O)(Q) 301 (Q) 302 ), or -P(=S)(Q 301 (Q) 302 ),

[0288] xb21 can be an integer from 1 to 5.

[0289] Q 301 To Q 303 Each can be independently C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio, phenyl, biphenyl, terphenyl, or naphthyl, and

[0290] At least one of conditions 1 to 3 is satisfied:

[0291] Condition 1

[0292] Ar in E-1 301 L 301 and R 301 One or more of which may independently include C1-C containing nitrogen lacking π electrons. 60 Cyclic groups;

[0293] Condition 2

[0294] L 301It can be a group represented by one of the following formulas,

[0295]

[0296] Condition 3

[0297] R in E-1 301 It is cyano, -S(=O)2(Q 301 -S(=O)(Q) 301 -P(=O)(Q) 301 (Q) 302 ), or -P(=S)(Q 301 (Q) 302 );

[0298] Formula H-1

[0299]

[0300]

[0301] Among them, in equations H-1, 11, and 12,

[0302] L 401 It is a single bond; or a π-electron-rich C3-C bond that is either unsubstituted or substituted as follows. 60 Cyclic groups: deuterium, C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiophene, benzo[9,10]phenanthryl, biphenyl, terphenyl, tetraphenyl, -Si(Q 401 (Q) 402 (Q) 403 ), or combinations thereof;

[0303] xc1 can be an integer from 1 to 10, where when xc1 is 2 or greater, two or more L 401 They can be the same or different from each other.

[0304] Ar 401 It can be a group represented by formula 11 or 12.

[0305] Ar 402 It may be a group represented by formula 11 or 12; or a π-electron-rich C3-C group, either unsubstituted or substituted as follows. 60 Cyclic groups (e.g., phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, biphenyl, terphenyl, benzo[9,10]phenanthrene, etc.): deuterium, C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C10 Alkylthio, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, benzo[9,10]phenanthryl, biphenyl, terphenyl, tetraphenyl, or combinations thereof.

[0306] xc11 can be an integer from 1 to 10, where when xc11 is 2 or greater, two or more Ar... 402 They can be the same or different from each other.

[0307] CY 401 and CY 402 Each can independently be a π-electron-rich C3-C 60 Cyclic groups (e.g., phenyl groups, naphthyl groups, fluorene groups, carbazole groups, benzo[a]carbazole groups, indol[a]carbazole groups, dibenzo[a]furan groups, dibenzo[a]thiophene groups, dibenzo[a]thiophene groups, benzo[a]naphtho[a]furan groups, benzo[a]naphtho[a]thiophene groups, benzo[a]naphtho[a]thiophene groups, etc.),

[0308] A 21 It can be a single bond, O, S, N(R) 411 ), C(R 411 (R) 412 ), or Si(R) 411 (R) 412 ),

[0309] A 22 It can be a single bond, O, S, N(R) 411 ), C(R 411 (R) 412 ), or Si(R) 411 (R) 412 ),

[0310] A in Equation 12 21 and A 22 At least one of them cannot be a single bond.

[0311] R 401 R 402 R 411 and R 412 Each can be independently:

[0312] Hydrogen, deuterium, C1-C 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthio;

[0313] Each of the following C1-C is replaced: 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthioyl: deuterium, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, or combinations thereof;

[0314] C3-C electrons that are not substituted or are substituted as follows 60 Cyclic groups: deuterium, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiophene, biphenyl, or combinations thereof; or

[0315] -Si(Q 404 (Q) 405 (Q) 406 );

[0316] e1 and e2 can each be an integer from 0 to 10 independently.

[0317] Q 401 To Q 406 Each can be independently hydrogen, deuterium, or C1-C 20 Alkyl, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, biphenyl, terphenyl, or benzo[9,10]phenanthryl, and

[0318] * indicates a binding site with an adjacent atom.

[0319] According to one or more embodiments, Ar in formula E-1 301 and L 301 Each can independently be an unsubstituted or substituted phenyl group, naphthyl group, fluorene group, spirodifluorene group, benzo[9,10]fluorene group, dibenzo[9,10]fluorene group, phenanthracene group, anthracene group, fluoranthracene group, benzo[9,10]phenanthracene group, pyrene group, Group, tetraphenyl group, Groups, Groups, pentylenetetrazol group, indene-anthracene group, dibenzofuran group, dibenzothiophene group, imidazole group, pyrazole group, thiazole group, isothiazole group, azole group, iso- Azolium group, pyridine group, pyrazine group, pyridazine group, pyrimidine group, indazole group, purine group, quinoline group, isoquinoline group, benzo[a]quinoline group, phthalazine group, naphthidine group, quinoxaline group, quinazoline group, cyclophosphine group, phenanthridine group, acridine group, phenanthrene-rhein group, phenazine group, benzimidazole group, benzisothiazole group, benzo[a] azole group, benzene azole group, triazole group, tetraazole group Diazole group, triazine group, thiadiazole group, imidazopyridine group, imidazopyrimidine group, or azacarbazole group: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, biphenyl, terphenyl, naphthyl, cyano-substituted phenyl, cyano-substituted biphenyl, cyano-substituted terphenyl, cyano-substituted naphthyl, pyridyl, phenylpyridyl, diphenylpyridyl, biphenylpyridyl, di(biphenyl)pyridyl, pyrazinyl, phenylpyrazinyl, diphenylpyrazinyl, biphenylpyrazinyl, di(biphenyl)pyrazinyl, pyridazinyl, phenylpyridazinyl, diphenylpyridazinyl, biphenylpyridazinyl, di(biphenyl)pyridazinyl, pyrimidinyl, phenylpyrimidinyl, diphenylpyrimidinyl, biphenylpyrimidinyl, di(biphenyl)pyrimidinyl, triazinyl, phenyltriazinyl, diphenyltriazinyl, biphenyltriazinyl, di(biphenyl)triazinyl, -Si(Q) 31 (Q) 32 (Q) 33 -Ge(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 -P(Q) 31 (Q) 32 -P(=O)(Q) 31 (Q) 32 ), or a combination thereof,

[0320] The quantity of L is xb1 301 At least one of them may be independently an imidazole group, a pyrazole group, a thiazole group, an isothiazole group, or a group that is either unsubstituted or substituted with the following: azole group, iso- Azolium group, pyridine group, pyrazine group, pyridazine group, pyrimidine group, indazole group, purine group, quinoline group, isoquinoline group, benzo[a]quinoline group, phthalazine group, naphthidine group, quinoxaline group, quinazoline group, cyclophosphine group, phenanthridine group, acridine group, phenanthrene-rhein group, phenazine group, benzimidazole group, benzisothiazole group, benzo[a] azole group, benzene azole group, triazole group, tetraazole group Diazole group, triazine group, thiadiazole group, imidazopyridine group, imidazopyrimidine group, or azacarbazole group: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, biphenyl, terphenyl, naphthyl, cyano-substituted phenyl, cyano-substituted biphenyl, cyano-substituted terphenyl, cyano-substituted naphthyl, pyridyl, phenylpyridyl, diphenylpyridyl, biphenylpyridyl, di(biphenyl)pyridyl, pyrazinyl, phenylpyrazinyl, diphenylpyrazinyl, biphenylpyrazinyl, di(biphenyl)pyrazinyl, pyridazinyl, phenylpyridazinyl, diphenylpyridazinyl, biphenylpyridazinyl, di(biphenyl)pyridazinyl, pyrimidinyl, phenylpyrimidinyl, diphenylpyrimidinyl, biphenylpyrimidinyl, di(biphenyl)pyrimidinyl, triazinyl, phenyltriazinyl, diphenyltriazinyl, biphenyltriazinyl, di(biphenyl)triazinyl, -Si(Q) 31 (Q) 32 (Q) 33 -Ge(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 -P(Q) 31 (Q) 32 -P(=O)(Q) 31 (Q) 32 ), or a combination thereof,

[0321] R 301 It can be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20Alkylthio, phenyl, biphenyl, terphenyl, tetraphenyl, naphthyl, cyano-substituted phenyl, cyano-substituted biphenyl, cyano-substituted terphenyl, tetraphenyl containing cyano, cyano-substituted naphthyl, pyridyl, phenylpyridyl, diphenylpyridyl, biphenylpyridyl, di(biphenyl)pyridyl, pyrazinyl, phenylpyrazinyl, diphenylpyrazinyl, biphenylpyrazinyl, di(biphenyl)pyrazinyl, pyridazinyl, phenylpyridazinyl, diphenylpyridazinyl, biphenylpyridazinyl, di(biphenyl)pyridazinyl, pyrimidinyl, phenylpyrimidinyl, diphenylpyrimidinyl, biphenylpyrimidinyl, di(biphenyl)pyrimidinyl, triazinyl, phenyltriazinyl, diphenyltriazinyl, biphenyltriazinyl, di(biphenyl)triazinyl, -Si(Q) 31 (Q) 32 (Q) 33 -Ge(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 -P(Q) 31 (Q) 32 ), or -P(=O)(Q 31 (Q) 32 ),and

[0322] Q 31 To Q 33 Each can be independently C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio, phenyl, biphenyl, terphenyl, or naphthyl.

[0323] In one or more embodiments,

[0324] Ar 301 It can be an unsubstituted or substituted phenyl group, naphthyl group, fluorene group, spirodifluorene group, benzo[9,10]fluorene group, dibenzo[9,10]fluorene group, phenanthracene group, anthracene group, fluoranthracene group, benzo[9,10]phenanthracene group, pyrene group, Group, tetraphenyl group, Groups, Groups, pentylenetetrazolium group, indene-anthracene group, dibenzofuran group, or dibenzothiophene group: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, biphenyl, terphenyl, naphthyl, cyano-substituted phenyl, cyano-substituted biphenyl, cyano-substituted terphenyl, cyano-substituted naphthyl, pyridyl, phenylpyridyl, diphenylpyridyl, biphenylpyridyl, di(biphenyl)pyridyl, pyrazinyl, phenylpyrazinyl, diphenylpyrazinyl, biphenylpyrazinyl, di(biphenyl)pyrazinyl, pyridazinyl, phenylpyridazinyl, diphenylpyridazinyl, biphenylpyridazinyl, di(biphenyl)pyridazinyl, pyrimidinyl, phenylpyrimidinyl, diphenylpyrimidinyl, biphenylpyrimidinyl, di(biphenyl)pyrimidinyl, triazinyl, phenyltriazinyl, diphenyltriazinyl, biphenyltriazinyl, di(biphenyl)triazinyl, -Si(Q) 31 (Q) 32 (Q) 33 -Ge(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 -P(Q) 31 (Q) 32 -P(=O)(Q) 31 (Q) 32 ), or a combination thereof; or

[0325] A group represented by one of formulas 5-1 to 5-3 or 6-1 to 6-33, and

[0326] L 301 It may be a group represented by one of formulas 5-1 to 5-3 or formulas 6-1 to 6-33:

[0327]

[0328]

[0329]

[0330]

[0331] Among them, in equations 5-1 to 5-3 and 6-1 to 6-33,

[0332] Z1 can be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, biphenyl, terphenyl, naphthyl, cyano-substituted phenyl, cyano-substituted biphenyl, cyano-substituted terphenyl, cyano-substituted naphthyl, pyridyl, phenylpyridyl, diphenylpyridyl, biphenylpyridyl, di(biphenyl)pyridyl, pyrazinyl, phenylpyrazinyl, diphenylpyrazinyl, biphenylpyrazinyl, di(biphenyl)pyrazinyl, pyridazinyl, phenylpyridazinyl, diphenylpyridazinyl, biphenylpyridazinyl, di(biphenyl)pyridazinyl, pyrimidinyl, phenylpyrimidinyl, diphenylpyrimidinyl, biphenylpyrimidinyl, di(biphenyl)pyrimidinyl, triazinyl, phenyltriazinyl, diphenyltriazinyl, biphenyltriazinyl, di(biphenyl)triazinyl, -Si(Q) 31 (Q) 32 (Q) 33 -Ge(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 -P(Q) 31 (Q) 32 ), or -P(=O)(Q 31 (Q) 32 ),

[0333] d4 can be 0, 1, 2, 3, or 4.

[0334] d3 can be 0, 1, 2, or 3.

[0335] d2 can be 0, 1, or 2, and

[0336] * and *' each represent a binding site with an adjacent atom.

[0337] Q 31 To Q 33 Each can be the same as described in this article.

[0338] In one or more embodiments, L 301 It can be a group represented by one of formulas 5-2, 5-3, or 6-8 to 6-33.

[0339] In one or more embodiments, R 301 It may be a cyano group or a group represented by one of formulas 7-1 to 7-18, and Ar in an amount of xc11. 402 At least one of the groups may be represented by one of formulas 7-1 to 7-18:

[0340]

[0341]

[0342] Among them, in equations 7-1 to 7-18,

[0343] xb41 to xb44 can each be 0, 1 or 2, wherein xb41 in formula 7-10 cannot be 0, xb41+xb42 in formulas 7-11 to 7-13 cannot be 0, xb41+xb42+xb43 in formulas 7-14 to 7-16 cannot be 0, and xb41+xb42+xb43+xb44 in formulas 7-17 and 7-18 cannot be 0, and * indicates the binding site with adjacent atoms.

[0344] In equation E-1, two or more Ar 301 They can be the same or different from each other, and two or more Ls 301 They can be the same as or different from each other. In equation H-1, two or more L... 401 They can be the same or different from each other, and two or more Ar 402 They may be the same as or different from each other.

[0345] According to one or more embodiments, when the main body is a mixture of electron transport main body and hole transport main body, the weight ratio of electron transport main body to hole transport main body can be from about 1:9 to about 9:1, from about 2:8 to about 8:2, or from about 4:6 to about 6:4. In some embodiments, the weight ratio of electron transport main body to hole transport main body can be about 5:5. When the weight ratio of electron transport main body to hole transport main body meets the range described above, hole and electron transport balance in the emitter layer can be achieved.

[0346] The main body may include at least one of the following: 1,3,5-tris(1-phenyl-1H-benzo[d]imidazol-2-yl)benzene (TPBi), 3-tert-butyl-9,10-bis(naphthyl-2-yl)anthracene (TBADN), 9,10-bis(naphthyl-2-yl)anthracene (ADN) (also known as "DNA"), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), 4,4'-bis(9-carbazolyl)-2,2'-dimethyl-biphenyl (CDBP), 1,3,5-tris(carbazolyl-9-yl)benzene (TCP), 1,3-bis(N-carbazolyl)benzene (mCP), compound H50, or compound H51, but the embodiments are not limited thereto:

[0347]

[0348] .

[0349] In one or more embodiments, the body may further include a compound represented by formula 301, but the embodiments are not limited thereto:

[0350] Formula 301

[0351]

[0352] Ar in Equation 301 111 and Ar 112 Each can be independently:

[0353] Phenylidene, naphthylene, phenanthrene, or pyrene; or

[0354] Each of the following is substituted with at least one of the following: phenylene, naphthylene, phenanthrene, or pyrene: phenyl, naphthyl, or anthracene.

[0355] Ar in Formula 301 113 To Ar 116 Each can be independently:

[0356] C1-C 10 Alkyl, phenyl, naphthyl, phenanthrene, or pyrene; or

[0357] Each of the following is substituted with at least one of the following: phenyl, naphthyl, phenanthryl, or pyrene: phenyl, naphthyl, anthracene, or a combination thereof.

[0358] In Equation 301, g, h, i, and j can each be an integer from 0 to 4, and can be, for example, 0, 1, or 2.

[0359] Ar in Formula 301 113 To Ar 116 Each can be independently:

[0360] C1-C substituted with at least one of phenyl, naphthyl, or anthracene 10 alkyl;

[0361] Phenyl, naphthyl, anthraceneyl, pyrene, phenanthryl, or fluoreneyl;

[0362] Each of the following is substituted with at least one of the following: phenyl, naphthyl, anthraceneyl, pyrene, phenanthrene, or fluorenyl: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, phenyl, naphthyl, anthraceneyl, pyrene, phenanthryl, or fluoreneyl; or

[0363] ,

[0364] However, the implementation methods are not limited to this.

[0365] In one or more embodiments, the main body may include a compound represented by formula 302, but the embodiments are not limited thereto:

[0366] Formula 302

[0367]

[0368] In equation 302, Ar 122 To Ar 125 The description of Ar in Equation 301 113 The description.

[0369] Ar in Equation 302 126 and Ar 127 Each can be independently C1-C 10 Alkyl groups (e.g., methyl, ethyl, propyl, etc.).

[0370] In Equation 302, k and l can each be an integer from 0 to 4 independently. For example, k and l can each be 0, 1, or 2 independently.

[0371] According to one or more embodiments, the main body may include at least one compound of compounds H1 to H26, HT2, ET1 and ET2, but the embodiments are not limited thereto:

[0372]

[0373]

[0374]

[0375]

[0376] .

[0377] According to one or more embodiments, the body may be composed of a type of compound. For example, the type of compound may be selected from the hole transport body or electron transport body described above.

[0378] According to one or more embodiments, the subject may include two or more types of compounds. For example, the subject may include two or more different hole transport subjects, two or more different electron transport subjects, or a combination of one or more types of hole transport subjects and one or more types of electron transport subjects.

[0379] According to one or more embodiments, the amount of the first compound in the emitter layer may be greater than or equal to the amount of the second compound in the emitter layer, based on weight. For example, the weight ratio of the first compound to the second compound in the emitter layer may be from about 10:0.1 to about 1:1.

[0380] According to one or more embodiments, the weight ratio of the host to the first compound in the emitting layer can be from about 60:40 to about 95:5. By satisfying the content ranges described above, the organic light-emitting device can have improved luminous efficiency and / or lifetime characteristics.

[0381] Figure 2 Description

[0382] According to one or more embodiments, the second compound may act as a delayed fluorescence emitter, and the first compound may act as a sensitizer, particularly a delayed fluorescence sensitizer.

[0383] According to one or more embodiments, the proportion of the luminescent component of the second compound relative to the total luminescent component emitted from the emitting layer may be about 80% or more, for example about 90% or more (as another example, about 95% or more). For example, the second compound may emit fluorescence and / or delayed fluorescence. In some embodiments, the host and / or the first compound may each not emit light.

[0384] Here, the second compound emits fluorescence and / or delayed fluorescence, and the emission component of the second compound can be the sum of the instantaneous (immediate) emission component of the second compound and the delayed fluorescence component of the second compound via RISC.

[0385] refer to Figure 2 The energy transfer according to one or more embodiments will now be described in further detail.

[0386] The energy of singlet excitons formed in the body of the emitter layer at a ratio of 25% is transferred to the singlet state of the first compound via Förster resonance energy transfer (FRET), and the energy of triplet excitons formed in the body at a ratio of 75% is transferred to the triplet state of the first compound. The singlet state energy of the first compound is then transferred to the second compound via FRET, and the triplet state energy of the first compound is transferred to the second compound via Dexter energy transfer. In these embodiments, the energy transferred from the first compound to the triplet state can also be transferred to the singlet state via reverse system crossover (RISC). In some embodiments, in the case of the first compound, the energy of the triplet state formed in the first compound can be transferred back to the body via triplet exciton distribution (TED), and then transferred again to the second compound to emit light via RISC.

[0387] Therefore, organic light-emitting devices with improved efficiency can be obtained by transferring both singlet and triplet excitons generated in the emitter layer to the dopant (e.g., the emitter). Furthermore, the lifetime characteristics of organic light-emitting devices can be improved because they exhibit significantly reduced energy loss.

[0388] According to one or more embodiments, the host, the first compound, and the second compound in the emitter layer may satisfy conditions E-1, E-2, and / or E-3:

[0389] Condition E-1

[0390] S1(H E ) ≥ S1(S C )

[0391] Condition E-2

[0392] S1(S C ) ≥ S1(HC)

[0393] Condition E-3

[0394] T1(S C ) ≥ T1(HC)

[0395] Among them, in conditions E-1, E-2, and E-3,

[0396] S1(H E ) represents the lowest excited singlet energy level of the subject.

[0397] S1(S C () represents the lowest excited singlet state energy level of the first compound.

[0398] S1(HC) represents the lowest excited singlet state energy level of the second compound.

[0399] T1(S C ) represents the lowest excited triplet energy level of the first compound, and

[0400] T1(HC) represents the lowest excited triplet energy level of the second compound.

[0401] S1(H E ), S1(S C S1(HC), T1(S) C T1 and T1(HC) can be evaluated using the DFT method of the Gaussian procedure with structural optimization at the B3LYP / 6-31G(d,p) level.

[0402] When the host, the first compound, and the second compound satisfy conditions E-1, E-2, and / or E-3, Dexter transition and FRET from the first compound to the second compound can be promoted, and thus the luminous efficiency of the organic light-emitting device can be improved.

[0403] According to one or more embodiments, the amount of the first compound in the emitter layer can be from about 3% to about 25% by weight, or from about 5% to about 15% by weight, based on the total weight of the emitter layer. When the amount of the first compound is within these ranges, energy transfer in the emitter layer can be effectively achieved. Therefore, an organic light-emitting device with high efficiency and long lifetime can be obtained.

[0404] According to one or more embodiments, the amount of the second compound in the emitter layer may be from about 0.01% by weight to about 15% by weight, particularly from about 0.5% by weight to about 5% by weight, based on the total weight of the emitter layer, but the embodiments are not limited thereto.

[0405] The hole transport region may be located between the first electrode 11 and the emitter layer, and the electron transport region may be located between the emitter layer and the second electrode 19.

[0406] A substrate may be further disposed below the first electrode 11 or on the second electrode 19. The substrate may be any suitable substrate for organic light-emitting devices, such as a glass substrate or a transparent plastic substrate having excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and / or water resistance.

[0407] The first electrode 11 can be formed, for example, by depositing or sputtering a material for forming the first electrode 11 onto a substrate. The first electrode 11 can be an anode. The material used to form the first electrode 11 can be selected from materials with high work function to facilitate hole injection.

[0408] The first electrode 11 can be a reflective electrode, a semi-transparent semi-reflective electrode, or a transmissive electrode. When the first electrode 11 is a transmissive electrode, the material used to form the first electrode 11 can be indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), or combinations thereof, but the embodiments are not limited thereto. In some embodiments, when the first electrode 11 is a semi-transparent semi-reflective electrode or a reflective electrode, at least one of magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), or combinations thereof can be used as the material used to form the first electrode 11, but the embodiments are not limited thereto.

[0409] The first electrode 11 may have a single-layer structure or a multi-layer structure including two or more layers.

[0410] For example, the first electrode 11 may have a three-layer structure of ITO / Ag / ITO, but the structure of the first electrode 11 is not limited to this.

[0411] The organic layer 15 may be located on the first electrode 11.

[0412] The organic layer 15 may include a hole transport region, an emitter layer, and an electron transport region.

[0413] The hole transport region may be located between the first electrode 11 and the emitter layer.

[0414] The hole transport region may include a hole injection layer, a hole transport layer, an electron blocking layer, a buffer layer, or a combination thereof.

[0415] The hole transport region may include only a hole injection layer or a hole transport layer. In one or more embodiments, the hole transport region may have a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / electron blocking layer structure, or a hole injection layer / first hole transport layer / second hole transport layer / electron blocking layer structure, wherein the corresponding layers of each structure are stacked sequentially from the first electrode 11 in the stated order.

[0416] When the hole transport region includes a hole injection layer (HIL), the HIL can be formed on the first electrode 11 using various methods such as vacuum deposition, spin coating, tape casting, and / or Langmuir-Broguet (LB) deposition, but the implementation is not limited to these methods.

[0417] When a high-intensity liposome (HIL) is formed by vacuum deposition, the deposition conditions can vary depending on the compound used to form the HIL, as well as the structure and thermal properties of the HIL to be formed, and can include deposition temperatures from about 100°C to about 500°C, and about 10 -8 To about 10 -3The vacuum level and deposition rate range from approximately 0.01 Å / s to approximately 100 Å / s. However, the deposition conditions are not limited to these.

[0418] When HIL is formed by spin coating, the coating conditions can vary depending on the compound used as the material for forming the HIL, as well as the structure and thermal properties of the HIL, and may include a coating speed of about 2,000 rpm to about 5,000 rpm and a heat treatment temperature of about 80°C to about 200°C for removing the solvent after coating. However, the coating conditions are not limited to these.

[0419] The conditions for forming the hole transport layer and electron blocking layer can be found in the description of the conditions for forming the HIL provided in this article.

[0420] The hole transport region may include at least one of the following: 4,4',4"-tris(3-methylphenylphenylamino)triphenylamine (m-MTDATA), 4,4',4"-tris(N,N-diphenylamino)triphenylamine (TDATA), 4,4',4"-tri{N-(2-naphthyl)-N-phenylamino}-triphenylamine (2-TNATA), N,N'-di(1-naphthyl)-N,N'-diphenylbenzidine (NPB), β-NPB, N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1-biphenyl]-4,4'-diamine (TPD), spiro-TPD, spiro-NPB, methylated NPB, 4,4'-cyclohexylidene bis[N,N-bis(4-methylphenyl)aniline] (TAPC), 4,4'-bis[N,N'-(3-tolyl)amino]-3,3'-dimethylbiphenyl (HMTPD), 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-sulfonylstyrene) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-sulfonylstyrene) (PANI / PSS), compounds represented by formula 201 below, or compounds represented by formula 202 below, but the embodiments are not limited thereto:

[0421]

[0422]

[0423] Formula 201

[0424]

[0425] Formula 202

[0426] .

[0427] Ar in Equation 201 101 and Ar 102 Each can be independently:

[0428] Phenylidene, cyclopentadienyl, indenyl, naphthyl, and other compounds alkyl, heptadeneyl, acenaphthene, fluoreneyl, phenentheneyl, anthraceneyl, fluoreneyl, benzo[9,10]phenentheneyl, pyreneyl, phenentheneyl alkyl, tetraphenyl, phenyl Base, Asia Benzyl, or pentanediphenyl; or

[0429] Each is substituted with at least one of the following: phenylene, cyclopentadienylene, indenylene, naphthylene, or phenylene oxide. alkyl, heptadeneyl, acenaphthene, fluoreneyl, phenentheneyl, anthraceneyl, fluoreneyl, benzo[9,10]phenentheneyl, pyreneyl, phenentheneyl alkyl, tetraphenyl, phenyl Base, Asia alkyl, or pentanephenyl: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio, C3-C 10 cycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thio groups, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, or combinations thereof.

[0430] In Equation 201, xa and xb can each be an integer from 0 to 5, or 0, 1, or 2. For example, xa can be 1 and xb can be 0, but xa and xb are not limited to these values.

[0431] R in Equations 201 and 202 101 To R 108 R 111 To R 119 and R 121 To R 124 Each can be independently:

[0432] Hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 10 Alkyl groups (e.g., methyl, ethyl, propyl, butyl, pentyl, hexyl, etc.), C1-C 10 Alkyl groups (e.g., methoxy, ethoxy, propoxy, butoxy, pentoxy, etc.) or C1-C 10 Alkylthio;

[0433] Each of the following C1-C is replaced: 10 Alkyl, C1-C 10 alkoxy, or C1-C 10 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, or combinations thereof;

[0434] Phenyl, naphthyl, anthraceneyl, fluorenyl, or pyrene; or

[0435] Each of the following substituted groups is phenyl, naphthyl, anthraceneyl, fluorenyl, or pyrene: deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio groups, or combinations thereof, but the implementation methods are not limited thereto.

[0436] R in Equation 201 109 Possible forms:

[0437] phenyl, naphthyl, anthraceneyl, or pyridyl; or

[0438] Each of the following substituted groups is phenyl, naphthyl, anthracene, or pyridyl: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, naphthyl, anthraceneyl, pyridyl, or combinations thereof.

[0439] According to one or more embodiments, the compound represented by formula 201 may be represented by formula 201A, but the embodiments are not limited thereto:

[0440] Formula 201A

[0441] .

[0442] R in Equation 201A 101 R 111 R 112 and R 109 Each can be as described in this article.

[0443] For example, the compounds represented by formula 201 and the compounds represented by formula 202 may include, but are not limited to, one of compounds HT1 to HT20:

[0444]

[0445]

[0446]

[0447] .

[0448] The thickness of the hole transport region can be from about 100 Å to about 10,000 Å, for example, from about 100 Å to about 1,000 Å. When the hole transport region includes at least one of a hole transport layer (HIL) and a hole transport layer, the thickness of the HIL can be from about 50 Å to about 10,000 Å, for example, from about 100 Å to about 1,000 Å, and the thickness of the hole transport layer can be from about 50 Å to about 2,000 Å, for example, from about 100 Å to about 1,500 Å. When the thicknesses of the hole transport region, the HIL, and the hole transport layer are within these ranges, satisfactory hole transport characteristics can be obtained without a significant increase in driving voltage.

[0449] In addition to the materials described above, the hole transport region may further include a charge-generating material for improving conductivity. The charge-generating material may be uniformly or non-uniformly dispersed in the hole transport region.

[0450] The charge-generating material can be, for example, a p-doper. The p-doper can be, but is not limited to, a quinone derivative, a metal oxide, or a cyano-containing compound. Non-limiting examples of p-dopers include quinone derivatives, such as tetracyanoquinone dimethyl ether (TCNQ) or 2,3,5,6-tetrafluoro-tetracyano-1,4-benzoquinone dimethyl ether (F4-TCNQ); metal oxides, such as tungsten oxide or molybdenum oxide; or cyano-containing compounds, such as compounds HT-D1 or F12, but the embodiments are not limited thereto.

[0451]

[0452]

[0453] The hole transport region may include a buffer layer.

[0454] The buffer layer can compensate for the optical resonant distance according to the wavelength of the light emitted from the emission layer, and thus the efficiency of the resulting organic light-emitting device can be improved.

[0455] In some embodiments, when the hole transport region includes an electron blocking layer, the material used to form the electron blocking layer may be selected from, but is not limited to, the materials and body materials described herein that can be used in the hole transport region. For example, when the hole transport region includes an electron blocking layer, the material used to form the electron blocking layer may be the mCP described above.

[0456] Emitter layers (EMLs) can be formed on hole transport regions via vacuum deposition, spin coating, casting, LB deposition, etc. When an emitter layer is formed by vacuum deposition or spin coating, the deposition or coating conditions can be largely similar to those used in forming high-level emitter layers (HILs), although the deposition or coating conditions can vary depending on the material used to form the emitter layer.

[0457] When the organic light-emitting device is a full-color organic light-emitting device, the emitting layer can be patterned as a red emitting layer, a green emitting layer, and / or a blue emitting layer. In one or more embodiments, the emitting layer may have a structure in which red emitting layers, green emitting layers, and / or blue emitting layers are stacked, and thus, various variations, such as the emission of white light, are possible.

[0458] When the emitter layer comprises a host and a dopant, the amount of dopant may typically range from about 0.01 parts by weight to about 15 parts by weight relative to 100 parts by weight of the host, but the implementation is not limited thereto.

[0459] The thickness of the emitting layer can be from about 100 Å to about 1,000 Å, for example from about 200 Å to about 600 Å. When the thickness of the emitting layer is within the range described above, excellent light emission characteristics can be obtained without a significant increase in driving voltage.

[0460] Next, the electron transport region can be located on the emitter layer.

[0461] The electron transport region may include a hole blocking layer, an electron transport layer, an electron injection layer, or a combination thereof.

[0462] For example, the electron transport region may have a hole blocking layer / electron transport layer / electron injection layer structure, or an electron transport layer / electron injection layer structure, and the structure of the electron transport region is not limited to these. The electron transport layer may have a multilayer structure or a single-layer structure comprising two or more different materials.

[0463] The conditions for forming the hole blocking layer, electron transport layer, and electron injection layer that constitute the electron transport region can be found in the description of the conditions for forming the HIL provided in this document.

[0464] When the electron transport region includes a hole blocking layer, the hole blocking layer may include, for example, at least one of DBFPO, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), or bis(2-methyl-8-hydroxyquinoline-N1,O8)-(1,1'-biphenyl-4-hydroxy)aluminum (BAlq), but the embodiments are not limited thereto.

[0465] .

[0466] The thickness of the hole blocking layer can be from about 20 Å to about 1,000 Å, for example from about 30 Å to about 300 Å. When the thickness of the hole blocking layer is within any of these ranges, excellent hole blocking characteristics can be obtained without a significant increase in driving voltage.

[0467] The electron transport layer may include at least one of the following: DBFPO, 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), tris(8-hydroxyquinoline)aluminum (Alq3), bis(2-methyl-8-hydroxyquinoline-N1,O8)-(1,1'-biphenyl-4-hydroxy)aluminum (BAlq), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ), or 4-(naphthyl-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), but the embodiments are not limited thereto:

[0468] .

[0469] In one or more embodiments, the electron transport layer may include at least one compound ET1 to ET25, but the embodiments are not limited thereto:

[0470]

[0471]

[0472]

[0473] .

[0474] The thickness of the electron transport layer can be from about 100 Å to about 1,000 Å, for example from about 150 Å to about 500 Å. When the thickness of the electron transport layer is within these ranges, satisfactory electron transport characteristics can be obtained without a significant increase in the driving voltage.

[0475] In addition to the materials described above, the electron transport layer may further include a material containing metal.

[0476] Materials containing metals may include Li complexes. Li complexes may include, for example, compounds ET-D1 (lithium 8-hydroxyquinoline, LiQ) or ET-D2, but the embodiments are not limited thereto:

[0477] .

[0478] The electron transport region may include an electron injection layer (EIL) that facilitates the injection of electrons from the second electrode 19.

[0479] EIL may include LiQ, LiF, NaCl, CsF, Li2O, BaO, or combinations thereof.

[0480] The thickness of the EIL can be from about 1 Å to about 100 Å, for example from about 3 Å to about 90 Å. When the thickness of the EIL is within the range described above, satisfactory electron injection characteristics can be obtained without a significant increase in the driving voltage.

[0481] The second electrode 19 may be located on the organic layer 15. The second electrode 19 may be a cathode. The material used to form the second electrode 19 may be a metal, alloy, conductive compound, or combination thereof having a relatively low work function. For example, lithium (Li), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), or magnesium-silver (Mg-Ag) may be used as the material for forming the second electrode 19. In one or more embodiments, various variations are possible for fabricating a top-emitting light-emitting device, such as using ITO or IZO to form a transmissive second electrode.

[0482] Already referenced Figure 1 Organic light-emitting devices are described, but implementation methods are not limited thereto.

[0483] According to another aspect, an electronic device including the organic light-emitting device is also provided.

[0484] In addition to the organic light-emitting device described above, the electronic device may further include a thin-film transistor (TFT). The thin-film transistor may include a source electrode, a drain electrode, and an active layer, wherein either the source electrode or the drain electrode may be electrically connected to either the first electrode or the second electrode of the organic light-emitting device.

[0485] According to another aspect, a diagnostic composition is provided, comprising a multiple resonance thermally activated delayed fluorescence material represented by Formula 1.

[0486] The diagnostic composition may include at least one multiple resonance thermally activated delayed fluorescence material represented by Formula 1.

[0487] Since the multiple resonant thermally activated delayed fluorescent material represented by Formula 1 can provide high luminescence efficiency, diagnostic compositions including the multiple resonant thermally activated delayed fluorescent material can have high diagnostic efficiency.

[0488] Diagnostic compositions can be used in a variety of applications, including diagnostic kits, diagnostic reagents, biosensors, biomarkers, etc., but implementation methods are not limited thereto.

[0489] As used in this article, the term "C1-C" 60 "alkyl" refers to a straight-chain or branched monovalent group of a saturated aliphatic hydrocarbon having 1 to 60 carbon atoms, and non-limiting examples include methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, hexyl, etc. The term "C1-C" is used herein. 60 "alkylene" refers to a compound with C1-C2 atoms. 60 Divalent groups with the same structure as alkyl groups.

[0490] C1-C 60 Alkyl, C1-C 20 Alkyl, and / or C1-C 10Non-limiting examples of alkyl groups include methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodel. Sec-decyl, tert-decyl, etc.: methyl, ethyl, n-propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, tert-pentyl, neopentyl, isopentyl, sec-pentyl, 3-pentyl, sec-isopentyl, n-hexyl, isohexyl, sec-hexyl, tert-hexyl, n-heptyl, isoheptyl, sec-heptyl, tert-heptyl, n-octyl, isooctyl, sec-octyl, tert-octyl, n-nonyl, isononyl, sec-nonyl, tert-nonyl, n-decyl, isodel, sec-decyl, tert-decyl, or combinations thereof. For example, formula 9-33 is a branched C6 alkyl group, such as tert-butyl substituted with two methyl groups.

[0491] As used in this article, the term "C1-C" 60 "Alkoxy" refers to the compound formed by -OA 101 (where A) 101 It is C1-C 60 Alkyl groups are monovalent groups, and non-limiting examples include methoxy, ethoxy, isopropoxy, etc.

[0492] C1-C 60 Alkoxy, C1-C 20 alkoxy, or C1-C 10 Non-limiting examples of alkoxy groups include methoxy, ethoxy, propoxy, butoxy, pentoxy, etc.

[0493] As used in this article, the term "C1-C" 60 "Alkylthio" refers to the group consisting of -SA 101’ (where A) 101’ It is C1-C 60 Alkyl groups are monovalent groups.

[0494] As used in this article, the term "C2-C" 60 "Alkenyl" refers to the group formed at C2-C... 60 The alkyl group contains at least one carbon-carbon double bond at its middle or end, and non-limiting examples include vinyl, propenyl, butenyl, etc. As used herein, the term "C2-C" is used... 60 "Alkenyl" refers to a group that has a C2-C bond structure. 60 Divalent groups with the same structure as alkenyl groups.

[0495] As used in this article, the term "C2-C" 60 "Alkyne group" refers to a group formed by the combination of C2-C... 60A hydrocarbon group formed by substituting at least one carbon-carbon triple bond into the middle or end of an alkyl group, and non-limiting examples include ethynyl, propynyl, etc. As used herein, the term "C2-C" is used in this context. 60 "Immyneyl" refers to a group that has a similar structure to C2-C2. 60 Divalent groups with the same structure as alkynyl groups.

[0496] As used in this article, the term "C3-C" 10 "Cycloalkyl" refers to a monovalent saturated hydrocarbon cyclic group having 3 to 10 carbon atoms as cyclic atoms, and non-limiting examples include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, etc. As used herein, the term "C3-C" is also relevant. 10 "Cycloalkylene" refers to a compound with C3-C66 atoms. 10 Divalent groups with the same structure as cycloalkyl groups.

[0497] As used in this article, the term "C3-C" 10 "Cycloalkyl" may include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl (norbornel), bicyclo[2.2.2]octyl, etc.

[0498] As used in this article, the term "C1-C" 10 "Heterocyclic alkyl" refers to a monovalent saturated cyclic group having at least one heteroatom selected from B, N, O, P, Si, S, Se, and Ge as a cyclic atom and 1 to 10 carbon atoms as cyclic atoms, and non-limiting examples include tetrahydrofuranyl, tetrahydrothiophenyl, etc. The term "C1-C" as used herein is also relevant. 10 "Heterocyclic alkyl" refers to a compound with C1-C2 atoms. 10 Divalent groups with the same structure as heterocyclic alkyl groups.

[0499] C1-C 10 Further non-limiting examples of heterocyclic alkyl groups include silylcyclopentyl, silylcyclohexyl, tetrahydrofuranyl, tetrahydro-2H-pyranyl, and tetrahydrothiophenyl.

[0500] As used in this article, the term "C3-C" 10 "Cycloalkenyl" refers to a monovalent hydrocarbon group having 3 to 10 carbon atoms as cyclic atoms and at least one carbon-carbon double bond in its ring and not being aromatic, and non-limiting examples include cyclopentenyl, cyclohexenyl, cycloheptenyl, etc. As used herein, the term "C3-C" is also relevant. 10 "Cycloalkylene" refers to a group that has a C3-C6 bond structure. 10 A divalent group with the same structure as a cycloalkenyl group.

[0501] As used in this article, the term "C1-C"10 "Heterocyclic alkenyl" refers to a monovalent group that has at least one heteroatom selected from B, N, O, P, Si, S, Se, and Ge as a cyclic atom, 1 to 10 carbon atoms as cyclic atoms, and at least one double bond, and is not aromatic. C1-C 10 Non-limiting examples of heterocyclic alkenyl groups include 2,3-dihydrofuranyl, 2,3-dihydrothiophenyl, etc., as used herein with the term "C1-C". 10 "Heterocyclic alkenyl" refers to a group that has a similar structure to C1-C1. 10 Divalent groups with the same structure as heterocyclic alkenyl groups.

[0502] As used in this article, the term "C6-C" 60 "Aryl" refers to a monovalent group having a carbocyclic aromatic ring system with 6 to 60 carbon atoms as cyclic atoms, and as used herein in the term "C6-C". 60 "Arylene" refers to a divalent group in a carbocyclic aromatic ring system with 6 to 60 carbon atoms as cyclic atoms. (C6-C) 60 Non-limiting examples of aryl groups include phenyl, naphthyl, anthraceneyl, phenanthryl, pyrene, Base, etc. When C6-C 60 Aryl and C6-C 60 When each of the aryl groups comprises two or more rings, the rings may be fused together.

[0503] As used in this article, the term "C7-C" 60 "alkylaryl" refers to an alkyl group formed by at least one C1-C2 group. 54 Alkyl-substituted C6-C 59 Aryl. As used in this text, the term "C7-C" 60 "Arylalkyl" refers to an alkyl group consisting of at least one C6-C bond. 59 Aryl-substituted C1-C 54 alkyl.

[0504] As used in this article, the term "C1-C" 60 "Heteroaryl" refers to a monovalent group having the following heteroaryl ring system: it has at least one heteroatom selected from B, N, O, P, Si, S, Se, and Ge as a cyclic atom, and 1 to 60 carbon atoms as cyclic atoms. The term "C1-C" is used herein. 60 "Hypo-heteroaryl" refers to a divalent group having the following heteroaromatic ring system: it has at least one heteroatom selected from B, N, O, P, Si, S, Se, and Ge as a cyclic atom, and 1 to 60 carbon atoms as cyclic atoms. C1-C 60 Non-limiting examples of heteroaryl groups include pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, etc. When C1-C... 60heteroaryl and C1-C 60 When each heteroaryl group comprises two or more rings, the rings can fused together.

[0505] As used in this article, the term "C2-C" 60 "alkyl heteroaryl" refers to an alkyl group formed by at least one C1-C2 group. 59 Alkyl-substituted C1-C 59 heteroaryl. As used in this text, the term "C2-C" is used in conjunction with... 60 "Heteroarylalkyl" refers to an alkyl group consisting of at least one C1-C2 group. 59 heteroaryl-substituted C1-C 59 alkyl.

[0506] As used in this article, the term "C6-C" 60 "Aryloxy group" refers to -OA 102 (where A) 102 It is C6-C 60 Aryl), and as used herein, the term "C6-C" 60 "Arylthio" refers to -SA 103 (where A) 103 It is C6-C 60 Aryl).

[0507] As used in this article, the term "C1-C" 60 "Heteroaryloxy" indicates -OA 104 (where A) 104 It is C1-C 60 (Heteroaryl), and as used herein, the term "C1-C 60 "Heteroarylsulfonyl" indicates -SA 105 (where A) 105 It is C1-C 60 (Miscellaneous aromatic compounds).

[0508] As used herein, the term "monovalent nonaromatic fused polycyclic group" refers to a monovalent group (e.g., having 8 to 60 carbon atoms) that has two or more rings fused together, has only carbon atoms as cyclic atoms, and is not aromatic in its entirety. Non-limiting examples of monovalent nonaromatic fused polycyclic groups include fluorene groups, etc. As used herein, the term "divalent nonaromatic fused polycyclic group" refers to a divalent group having the same structure as a monovalent nonaromatic fused polycyclic group.

[0509] As used herein, the term "monovalent nonaromatic fused heterocyclic group" refers to a monovalent group (e.g., having 1 to 60 carbon atoms) that has two or more fused rings, has heteroatoms selected from B, N, O, P, Si, S, Se, and Ge as cyclic atoms in addition to carbon atoms, and is not aromatic in its overall structure. Non-limiting examples of monovalent nonaromatic fused heterocyclic groups include carbazole groups, etc. As used herein, the term "divalent nonaromatic fused heterocyclic group" refers to a divalent group having the same structure as a monovalent nonaromatic fused heterocyclic group.

[0510] As used in this article, the term "C5-C" 30 A "carbocyclic group" refers to a saturated or unsaturated cyclic group having only 5 to 30 carbon atoms as cyclic atoms. (C5-C) 30 The carbocyclic group can be a monocyclic or polycyclic group. For example, as used herein, "(unsubstituted or with at least one R)" 10a (Replacement) C5-C 30 Non-limiting examples of "carbocyclic groups" include (each unsubstituted or with at least one R) 10a Substituted) adamantyl group, norbornene group, bicyclo[1.1.1]pentyl group, bicyclo[2.1.1]hexyl group, bicyclo[2.2.1]heptane (norbornene) group, bicyclo[2.2.2]octyl group, cyclopentyl group, cyclohexyl group, cyclohexene group, phenyl group, naphthyl group, anthracene group, phenanthrene group, benzo[9,10]phenanthrene group, pyrene group, Groups, 1,2,3,4-tetrahydronaphthalene group, cyclopentadienyl group, indene group, fluorene group, etc.

[0511] As used in this article, the term "C1-C" 30 A "heterocyclic group" refers to a saturated or unsaturated cyclic group that, in addition to 1 to 30 carbon atoms as cyclic atoms, has at least one heteroatom selected from B, N, O, Si, P, S, Se, and Ge as a cyclic atom. C1-C 30 Heterocyclic groups can be monocyclic or polycyclic. For example, as used herein, "(unsubstituted or with at least one R)" 10a (Replacement) C1-C 30 Non-limiting examples of "heterocyclic groups" may include "(unsubstituted or with at least one R)". 10a (replaced) C1-C 30 "Heterocyclic groups" may include (each unsubstituted or with at least one R) 10aSubstituted thiophene group, furan group, pyrrole group, thiophene group, borocyclopentadien group, phosphacyclopentadien group, selenophene group, germanium heterocyclopentadien group, benzothiophene group, benzofuran group, indole group, benzothiophene group, benzoboron heterocyclopentadien group, benzophosphacyclopentadien group, benzoselenophene group, benzogermanium heterocyclopentadien group, dibenzothiophene group, dibenzofuran group, carbazole group, dibenzothiophene group, dibenzoboron heterocyclopentadien group, dibenzophosphacyclopentadien group, dibenzoselenophene group, dibenzogermanium heterocyclopentadien group, dibenzothiophene 5-oxide group, 9H-fluorene-9-one group, dibenzothiophene 5,5-dioxide group, azabenzothiophene group, azabenzofuran group, azaindole group, azaindene group, nitrogen The following groups are listed: benzothiophene group, azibabenzoborane group, azibabenzophosphacyclopentadiene group, azibabenzoselenophene group, azibabenzogeranecyclopentadiene group, azibadibenzothiophene group, azibadibenzofuran group, azibacarbazole group, azibafluorene group, azibadibenzothiophene group, azibadibenzoboranecyclopentadiene group, azibadibenzophosphacyclopentadiene group, azibadibenzoselenophene group, azibadibenzogeranecyclopentadiene group, azibadibenzothiophene 5-oxide group, aziba-9H-fluorene-9-one group, azibadibenzothiophene 5,5-dioxide group, pyridine group, pyrimidine group, pyrazine group, pyridazine group, triazine group, quinoline group, isoquinoline group, quinoxaline group, quinazolinine group, phenanthrene-rhein group, pyrazole group, imidazole group, triazole group. azole group, iso- azole group, thiazole group, isothiazole group, Diazole group, thiadiazole group, benzopyrazole group, benzimidazole group, benzo[] azole group, benzothiazole group, benzo[] Diazole group, benzothiadiazole group, 5,6,7,8-tetrahydroisoquinoline group, 5,6,7,8-tetrahydroquinoline group, etc.

[0512] As used herein, "TMS" stands for *-Si(CH3)3, and "TMG" stands for *-Ge(CH3)3. The term "(C1-C" as used herein is also used. 20 (alkyl)X group (e.g., (C1-C) 20 Alkyl)phenyl) refers to a compound formed by at least one C1-C2 bond. 20 Alkyl-substituted X group (e.g., phenyl).

[0513] Replacement C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl, substituted C2-C 60Alkenyl, substituted C2-C 60 Alkyne group, substituted C1-C 60 Alkoxy, substituted C1-C 60 Alkylthio, substituted C3-C 10 cycloalkyl, substituted C1-C 10 Heterocyclic alkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocyclic alkenyl, substituted C6-C 60 Aryl, substituted C7-C 60 Alkyl aryl, substituted C7-C 60 Arylalkyl, substituted C6-C 60 aryloxy groups, substituted C6-C 60 Arylthioyl, substituted C1-C 60 heteroaryl, substituted C2-C 60 Alkyl heteroaryl, substituted C2-C 60 Heteroarylalkyl, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 At least one substituent of the heteroaryl thio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused heterocyclic group is:

[0514] Deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio,

[0515] Each of the following C1-C is replaced: 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -N(Q) 11 (Q) 12 ), -Si(Q 11 (Q) 12 (Q) 13 -Ge(Q) 11 (Q) 12 (Q) 13 -C(=O)(Q) 11 -S(=O)(Q) 11 -S(=O)2(Q) 11 -B(Q) 11 (Q) 12 -P(Q) 11 (Q) 12 -P(=O)(Q) 11 (Q) 12 -P(=S)(Q) 11 (Q) 12 ), or combinations thereof;

[0516] Each of the following C3-Cs was not replaced or was replaced as follows 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid groups or their salts, sulfonic acid groups or their salts, phosphate groups or their salts, C1-C60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 aryloxy group, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -N(Q) 21 (Q) 22 ), -Si(Q 21 (Q) 22 (Q) 23 -Ge(Q) 21 (Q) 22 (Q) 23 -C(=O)(Q) 21 -S(=O)(Q) 21 -S(=O)2(Q) 21 -B(Q) 21 (Q) 22 -P(Q) 21 (Q) 22 -P(=O)(Q) 21 (Q) 22 -P(=S)(Q) 21 (Q) 22 ), or combinations thereof;

[0517] -N(Q 31 (Q) 32 ), -Si(Q 31 (Q) 32 (Q) 33 -Ge(Q) 31 (Q) 32 (Q) 33 -C(=O)(Q) 31 -S(=O)(Q) 31 -S(=O)2(Q) 31-B(Q) 31 (Q) 32 -P(Q) 31 (Q) 32 -P(=O)(Q) 31 (Q) 32 ), or -P(=S)(Q 31 (Q) 32 );or

[0518] Its combination, and

[0519] Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each group can independently be hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, or substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

[0520] For example, Q1 to Q3, Q11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each can be independently:

[0521] Hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, or phosphate group or its salt; or

[0522] Each of the following C1-Cs was not replaced or was replaced as follows 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups: deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, C1-C 60 Alkyl, C6-C 60 Aryl, C1-C 60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, or combinations thereof.

[0523] The organic light-emitting device according to one or more embodiments will be described in further detail below with reference to examples. However, the embodiments are not limited to the following examples.

[0524] Example

[0525] Evaluation Example 1: Characterization of Multiple Resonance Delayed Fluorescence Materials

[0526] The HOMO level, S1 level, and ΔE of several compounds in multi-resonance thermally activated delayed fluorescence materials were evaluated using the Gaussian 09 program, which includes molecular structure optimization based on B3LYP using density functional theory (DFT). ST Energy. The results are shown in Table 1. Additionally, the half-width (nm) was evaluated from the emission spectra of each compound; this is the wavelength width corresponding to half of the maximum emission intensity. The results are shown in Table 1.

[0527] Table 1

[0528]

[0529]

[0530]

[0531] Example 1

[0532] The glass substrate with a 1500 Å thick ITO layer was cut into 50 mm × 50 mm × 0.5 mm pieces and ultrasonically cleaned for 15 minutes each in acetone, isopropanol, and deionized (DI) water, followed by UV ozone cleaning for 30 minutes. The resulting glass substrate was then loaded onto a vacuum deposition apparatus.

[0533] Subsequently, HAT-CN is deposited on the ITO electrode (anode) on the glass substrate to form a hole injection layer with a thickness of 100 Å, and NPB is deposited on the hole injection layer to form a first hole transport layer with a thickness of 500 Å, and TCTA is deposited on the first hole transport layer to form a second hole transport layer with a thickness of 50 Å, and mCP is deposited on the second hole transport layer to form an electron blocking layer with a thickness of 50 Å.

[0534] A first host (HT1), a second host (ET1), a first compound (compound 1), and a second compound (compound 2) were co-deposited on an electron blocking layer to form an emission layer with a thickness of 400 Å. The first host and the second host were mixed in a 50:50 weight ratio, and the first compound and the second compound were each adjusted to 3% by weight of the total weight of the first host, the second host, the first compound, and the second compound.

[0535] DBFPO is deposited on the emitter layer to form a hole blocking layer with a thickness of 100 Å. DBFPO and LiQ are co-deposited on the hole blocking layer in a 5:5 weight ratio to form an electron transport layer with a thickness of 300 Å. LiQ is deposited on the electron transport layer to form an electron injection layer with a thickness of 10 Å. Al is deposited on the electron injection layer to form a cathode with a thickness of 1,000 Å, thereby completing the fabrication of the organic light-emitting device.

[0536]

[0537]

[0538]

[0539]

[0540] Examples 2 to 3 and Comparative Examples 1 to 7

[0541] The organic light-emitting device was manufactured using the same method as in Example 1, except that the compounds described in Table 2 were used as the host, the first compound, and the second compound when forming the emitting layer.

[0542] Comparative Example 8

[0543] The organic light-emitting device was manufactured using the same method as in Example 1, except that the compounds described in Table 3 were used as the host, the first compound, and the second compound when forming the emitting layer.

[0544] Evaluation Example 2: Evaluation of the characteristics of organic light-emitting devices

[0545] The efficiency and lifetime of the organic light-emitting devices fabricated in Examples 1 to 3 and Comparative Examples 1 to 7 were measured and evaluated using a current-voltmeter (Keithley 2636B) and a luminance meter (SR-3AR, Topcon), and the results are shown as relative values ​​(%) in Table 2 below. In Table 2, Examples 1 and Comparative Example 2 are shown as relative values ​​to Comparative Example 1; Examples 2, 4, and 5 are shown as relative values ​​to Comparative Example 3; and Examples 3 and 7 are shown as relative values ​​to Comparative Example 6.

[0546] Efficiency and lifespan as per 1,000 nits (cd / m³) 2 The external quantum efficiency (EQE) and the time until the brightness decreases to 95% of the initial brightness (1,000 nits) were measured.

[0547] In addition, relative lifetime, spectral overlap integral (SOI), and Δtau(D) were measured and evaluated for the organic light-emitting devices fabricated in Examples 1 to 3 and Comparative Example 8. MR1 Δtau(D) MR2 and EC MR2 Δtau(D) MR1 = tau(D) MR1:MR2 / tau(D) MR1 X 100%, and Δtau(D) MR2= tau(D) MR1:MR2 / tau(D) MR2 X 100%. The results are shown in Tables 3 and 4 below. The measurement methods for each item are as described in this document.

[0548] Table 2

[0549]

[0550] Referring to Table 2 above, it can be seen that the organic light-emitting devices according to one or more embodiments have excellent efficiency and lifetime. Furthermore, it was found that the organic light-emitting devices of Examples 1 to 3 have significantly superior efficiency and lifetime compared to the organic light-emitting devices of Comparative Examples 1 to 7.

[0551] Table 3

[0552]

[0553] Table 4

[0554]

[0555] Referring to Tables 3 and 4 above, it was found that the organic light-emitting devices according to one or more embodiments have high lifetimes, minimal variation in exciton lifetimes, and high luminescence ratios of the second compound. Furthermore, compared to the organic light-emitting device of Comparative Example 8, the organic light-emitting devices of Examples 1 to 3 were found to have significantly higher lifetimes, smaller variation in exciton lifetimes, and significantly higher luminescence ratios of the second compound.

[0556] Specifically, referring to Tables 2 and 3, due to SOI MR1-MR2 At 5.0 x 10 14 M -1 cm -1 nm 4 Up to 5.0 x 10 15 M -1 cm - 1 nm 4 Within the range, the organic light-emitting devices of Examples 1 to 3 have excellent efficiency and lifetime.

[0557] The organic light-emitting device can possess characteristics of high color purity, high efficiency, and long lifespan. Furthermore, it can enable the development of high-quality electronic devices incorporating the organic light-emitting device.

[0558] It should be understood that the exemplary embodiments described herein are to be considered in a descriptive sense only and are not intended to be limiting. The descriptions of features or aspects in each embodiment should typically be considered applicable to other similar features or aspects in other embodiments.

[0559] Although one or more embodiments have been described with reference to the accompanying drawings, those skilled in the art will understand that various changes in form and detail may be made therein without departing from the spirit and scope defined by the appended claims.

Claims

1. Organic light-emitting devices, including: First electrode; Second electrode; as well as The organic layer located between the first electrode and the second electrode, The organic layer mentioned above includes an emission layer. in The emission layer comprises a first compound and a second compound. The first compound and the second compound are each independently multiple resonance thermally activated delayed fluorescence materials, and Wherein the first compound and the second compound satisfy inequality 1: Inequality 1 In inequality 1, SOI MR1-MR2 is the integral of the spectral overlap of the photoluminescence spectrum of the first compound and the ultraviolet absorption spectrum of the second compound, and The spectral overlap integral is evaluated using Expression 1: Expression 1 In expression 1, J is the photoluminescence spectrum of the first compound and the ultraviolet absorption spectrum of the second compound, expressed as M. -1 cm -1 nm 4 The spectral overlap integral is in units of 1. The M value of the second compound was calculated from its ultraviolet absorption spectrum. -1 cm -1 The molar extinction coefficient is expressed in units of 1. λ is the wavelength in nm of the photoluminescence spectrum and the ultraviolet absorption spectrum. It is the photoluminescence spectrum of the first compound normalized to an area of ​​1 and is dimensionless.

2. The organic light-emitting device according to claim 1, wherein... The first compound and the second compound satisfy inequality 2: Inequality 2 in, In inequality 2, S1 MR1 It is the singlet state energy level of the first compound, and S1 MR2 It is the singlet energy level of the second compound.

3. The organic light-emitting device according to claim 1, wherein... The first compound and the second compound satisfy inequality 3: Inequality 3 in, In inequality 3, HOMO MR1 It is the highest occupied molecular orbital energy level of the first compound, and HOMO MR2 It is the highest occupied molecular orbital energy level of the second compound.

4. The organic light-emitting device according to claim 1, wherein... The organic light-emitting device satisfies equations 4-1 and 4-2: Relation 4-1 Relation 4-2 in, In relations 4-1 and 4-2, tau(D) MR1:MR2 It is the exciton lifetime of the combination of the first compound and the second compound. tau(D) MR1 It is the exciton lifetime of the first compound, and tau(D) MR2 It is the exciton lifetime of the second compound.

5. The organic light-emitting device according to claim 1, wherein... The organic light-emitting device satisfies inequality 5: Inequality 5 in, In inequality 5, EC MR2 This is the emission contribution of the second compound.

6. The organic light-emitting device according to claim 1, wherein... The multiple resonance thermally activated delayed fluorescence material is a compound represented by Formula 1: Formula 1 in, In Equation 1, X1 is either B or N. Rings CY1 to CY3 are each independently C5-C 30 Carbocyclic groups or C1-C 30 Heterocyclic groups, Y1 is a single bond, *-N(R1)-*', *-B(R1)-*', *-P(R1)-*', *-C(R1)(R2)-*', *-Si(R1)(R2)-*', *-Ge(R1)(R2)-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*'. Y2 is a single bond, *-N(R3)-*', *-B(R3)-*', *-P(R3)-*', *-C(R3)(R4)-*', *-Si(R3)(R4)-*', *-Ge(R3)(R4)-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*'. Y3 is a single bond, *-N(R5)-*', *-B(R5)-*', *-P(R5)-*', *-C(R5)(R6)-*', *-Si(R5)(R6)-*', *-Ge(R5)(R6)-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*'. k1 to k3 are each independently 0 or 1. When k1 is 0, Y1 does not exist; when k2 is 0, Y2 does not exist; when k3 is 0, Y3 does not exist. R1 to R6, R 10 R 20 and R 30 Each of the following groups is independently hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heterocyclic groups, -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P(Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2), b10, b20, and b30 are each independent integers from 0 to 20. Adjacent R1 to R6, R 10 R 20 and R 30 Two or more of these may optionally combine with each other to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, Two or more R 10 Optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, Two or more R 20 Optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, Two or more R 30 Optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, * and *' each represent the binding site with the adjacent atom. Replacement C5-C 30 Carbocyclic groups, substituted C1-C 30 Heterocyclic groups, substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkyne group, substituted C1-C 60 Alkoxy, substituted C1-C 60 Alkylthio, substituted C3-C 10 cycloalkyl, substituted C1-C 10 Heterocyclic alkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocyclic alkenyl, substituted C6-C 60 Aryl, substituted C7-C 60 Alkyl aryl, substituted C7-C 60 Arylalkyl, substituted C6-C 60 aryloxy groups, substituted C6-C 60 Arylthioyl, substituted C1-C 60 heteroaryl, substituted C2-C 60 Alkyl heteroaryl, substituted C2-C 60 Heteroarylalkyl, substituted C1-C 60 Heteroaryl groups, substituted C1-C 60 At least one substituent of the heteroaryl thio group, the substituted monovalent non-aromatic fused polycyclic group, and the substituted monovalent non-aromatic fused heterocyclic group is: Deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio; Each of the following C1-C is replaced: 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 alkoxy, or C1-C 60 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -Si(Q) 11 (Q) 12 (Q) 13 -Ge(Q) 11 (Q) 12 (Q) 13 -B(Q) 11 (Q) 12 -N(Q) 11 (Q) 12 -P(Q) 11 (Q) 12 -C(=O)(Q) 11 -S(=O)(Q) 11 -S(=O)2(Q) 11 -P(=O)(Q) 11 (Q) 12 -P(=S)(Q) 11 (Q) 12 ), or combinations thereof; C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups, Each of the following C3-C is replaced: 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, or monovalent non-aromatic fused heterocyclic groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid groups or their salts, sulfonic acid groups or their salts, phosphate groups or their salts, C1-C 60 Alkyl, C2-C 60 alkenyl, C2-C 60 alkynyl group, C1-C 60 Alkoxy, C1-C 60 Alkylthio, C3-C 10 cycloalkyl, C1-C 10 Heterocyclic alkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocyclic alkenyl, C6-C 60 Aryl, C7-C 60 Alkyl aryl, C7-C 60 Arylalkyl, C6-C 60 Aryloxy group, C6-C 60 Arylthio, C1-C 60 heteroaryl, C2-C 60 Alkyl heteroaryl, C2-C 60 Heteroarylalkyl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroaryl thiols, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -Si(Q) 21 (Q) 22 (Q) 23 -Ge(Q) 21 (Q) 22 (Q) 23 -B(Q) 21 (Q) 22 -N(Q) 21 (Q) 22 -P(Q) 21 (Q) 22 -C(=O)(Q) 21 -S(=O)(Q) 21 -S(=O)2(Q) 21 -P(=O)(Q) 21 (Q) 22 -P(=S)(Q) 21 (Q) 22 ), or combinations thereof; or -Si(Q 31 )(Q 32 )(Q 33 )、-Ge(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 )、或-P(=S)(Q 31 )(Q 32 ),和 Q1 to Q3, Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each of the following groups is independently hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, or substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

7. The organic light-emitting device according to claim 6, wherein... Each of rings CY1 to CY3 is independently a phenyl group, naphthyl group, phenanthrene group, fluorene group, pyridine group, pyrimidine group, quinoline group, isoquinoline group, phthalazine group, naphthidine group, quinoxaline group, quinazoline group, carbazole group, dibenzofuran group, dibenzothiophene group, dibenzothiophene group, or a group represented by formula 2: Formula 2 in, In Equation 2, X2 is either B or N. Rings CY4 to CY6 are each independently C5-C. 30 Carbocyclic groups or C1-C 30 Heterocyclic groups, Y4 is a single bond, *-N(R) 71 )-*'、*-B(R 71 )-*'、*-P(R 71 )-*'、*-C(R 71 (R) 72 )-*'、*-Si(R 71 (R) 72 )-*'、*-Ge(R 71 (R) 72 )-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*', Y5 is a single bond, *-N(R) 73 )-*'、*-B(R 73 )-*'、*-P(R 73 )-*'、*-C(R 73 (R) 74 )-*'、*-Si(R 73 (R) 74 )-*'、*-Ge(R 73 (R) 74 )-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*', Y6 is a single bond, *-N(R) 75 )-*'、*-B(R 75 )-*'、*-P(R 75 )-*'、*-C(R 75 (R) 76 )-*'、*-Si(R 75 (R) 76 )-*'、*-Ge(R 75 (R) 76 )-*', *-O-*', *-S-*', *-Se-*', *-C(=O)-*', or *-S(=O)2-*', k4 to k6 are each independently 0 or 1. When k4 is 0, Y4 does not exist; when k5 is 0, Y5 does not exist; when k6 is 0, Y6 does not exist. R 40 R 50 R 60 and R 71 To R 76 Each independently of the R described in claim 6 10 same, b40, b50, and b60 are each independent integers from 0 to 20. Adjacent R 40 R 50 R 60 and R 71 To R 76 Two or more of these may optionally combine with each other to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, Two or more R 40 Optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, Two or more R 50 Optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, Two or more R 60 Optionally combined to form substituted or unsubstituted C5-C 30 The carbocyclic group is either substituted or unsubstituted C1-C. 30 Heterocyclic groups, and * and *' each represent a binding site with an adjacent atom.

8. The organic light-emitting device according to claim 6, wherein... R1 to R6, R 10 R 20 and R 30 Each independently is: Hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthio; Each of the following C1-C is replaced: 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthio groups: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amidine, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, deuterated C1-C 20 Alkyl, fluorinated C1-C 20 Alkyl, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, (C1-C 20 alkyl)cyclopentyl, (C1-C 20 alkyl)cyclohexyl, (C1-C 20 alkyl)cycloheptyl, (C1-C 20 alkyl)cyclooctyl, (C1-C 20 Alkyl) adamantyl, (C1-C 20 alkyl) norbornenyl, (C1-C 20 alkyl)cyclopentenyl, (C1-C 20 alkyl)cyclohexenyl, (C1-C 20 alkyl)cycloheptenyl, (C1-C 20 Alkyl)bicyclo[1.1.1]pentyl, (C1-C 20 Alkyl)bicyclo[2.1.1]hexyl, (C1-C 20 Alkyl)bicyclo[2.2.1]heptyl, (C1-C 20 Alkyl)bicyclo[2.2.2]octyl, silylcyclopentyl, phenyl, (C1-C 20 Alkyl)phenyl, biphenyl, terphenyl, naphthyl, 1,2,3,4-tetrahydronaphthyl, pyridyl, pyrimidinyl, or combinations thereof; Each of the following substituted compounds, either unsubstituted or substituted with: cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, silanecyclopentyl, phenyl, (C1-C 20 Alkyl)phenyl, biphenyl, terphenyl, naphthyl, 1,2,3,4-tetrahydronaphthyl, fluorenyl, phenanthryl, anthracene, fluoranyl, benzo[9,10]phenanthryl, pyrene, alkyl, pyrroleyl, thiophenyl, furanyl, imidazoleyl, pyrazolyl, thiazolyl, isothiazolyl, azole group, iso Azolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazole, purine, quinolinyl, isoquinolinyl, benzoquinolinyl, quinoxalinyl, quinazolinyl, cyclophosphinyl, carbazole, phenanthrolinel, benzimidazolyl, benzofuranyl, benzothiophene, benzoisothiazolyl, benzo[] azole group, benzo[a] Azolyl, triazolyl, tetrazolyl, Diazolyl, triazinyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazoyl, dibenzocarbazoyl, imidazopyridyl, imidazopyrimidinyl, azacarbazoyl, azadibenzofuranyl, or azadibenzothiophenyl: deuterium, -F, -Cl, -Br, -I, -SF5, -CD3, -CD2H, -CDH2, -CF3, -CF2H, -CFH2, hydroxyl, cyano, nitro, amino, amido, hydrazyl, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, C1-C 20 Alkyl, deuterated C1-C 20 Alkyl, fluorinated C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, cyclopentyl, cyclohexyl, cycloheptyl, cyclooctyl, adamantyl, norbornenyl, cyclopentenyl, cyclohexenyl, cycloheptenyl, bicyclo[1.1.1]pentyl, bicyclo[2.1.1]hexyl, bicyclo[2.2.1]heptyl, bicyclo[2.2.2]octyl, (C1-C 20 alkyl)cyclopentyl, (C1-C 20 alkyl)cyclohexyl, (C1-C 20 alkyl)cycloheptyl, (C1-C 20 alkyl)cyclooctyl, (C1-C 20 Alkyl) adamantyl, (C1-C 20 alkyl) norbornenyl, (C1-C 20 alkyl)cyclopentenyl, (C1-C 20 alkyl)cyclohexenyl, (C1-C 20 alkyl)cycloheptenyl, (C1-C 20 Alkyl)bicyclo[1.1.1]pentyl, (C1-C 20 Alkyl)bicyclo[2.1.1]hexyl, (C1-C 20 Alkyl)bicyclo[2.2.1]heptyl, (C1-C 20 Alkyl)bicyclo[2.2.2]octyl, silylcyclopentyl, phenyl, (C1-C 20 Alkyl)phenyl, biphenyl, terphenyl, naphthyl, 1,2,3,4-tetrahydronaphthyl, fluorenyl, phenanthryl, anthracene, fluoranyl, benzo[9,10]phenanthryl, pyrene, alkyl, pyrroleyl, thiophenyl, furanyl, imidazoleyl, pyrazolyl, thiazolyl, isothiazolyl, azole group, iso Azolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, isoindolyl, indolyl, indazole, purine, quinolinyl, isoquinolinyl, benzoquinolinyl, quinoxalinyl, quinazolinyl, cyclophosphinyl, carbazole, phenanthrolinel, benzimidazolyl, benzofuranyl, benzothiophene, benzoisothiazolyl, benzo[] azole group, benzo[a] Azolyl, triazolyl, tetrazolyl, Diazolyl, triazine, dibenzofuranyl, dibenzothiophenyl, benzocarbazole, dibenzocarbazole, imidazopyridyl, imidazopyrimidinyl, azacarbazole, azadibenzofuranyl, azadibenzothiophenyl, or combinations thereof; or -Si(Q1)(Q2)(Q3), -Ge(Q1)(Q2)(Q3), -C(Q1)(Q2)(Q3), -B(Q1)(Q2), -N(Q1)(Q2), -P( Q1)(Q2), -C(=O)(Q1), -S(=O)(Q1), -S(=O)2(Q1), -P(=O)(Q1)(Q2), or -P(=S)(Q1)(Q2).

9. The organic light-emitting device according to claim 1, wherein... The multiple resonance thermally activated delayed fluorescence material includes at least one boron atom.

10. The organic light-emitting device according to claim 1, wherein... The multiple resonance thermally activated delayed fluorescence material is one of compounds 1 to 4: 。 11. The organic light-emitting device according to claim 1, wherein... The emission layer further includes a body.

12. The organic light-emitting device according to claim 11, wherein... The subject includes: An electronic transmission body comprising at least one electronic transmission component; and Hole transport entity that does not include an electronic transport component.

13. The organic light-emitting device according to claim 12, wherein: The electron transport host comprises a compound represented by formula E-1: E-1 In E-1, Ar 301 For not being replaced or by at least one R 301a Replacement C5-C 60 The carbocyclic group, or the unsubstituted group or the group with at least one R 301a Replacement C1-C 60 Heterocyclic groups, xb11 is 1, 2, or 3. Each L 301 Independently a single bond, unsubstituted or by at least one R 301a Replacement C5-C 60 Carbocyclic groups, unsubstituted or with at least one R 301a Replacement C1-C 60 Heterocyclic groups, or groups represented by one of the following formulas: *, *', and *" each represent a binding site with an adjacent atom. xb1 is an integer from 1 to 5. R 301a and R 301 Each of the following groups is independently hydrogen, deuterium, -F, -Cl, -Br, -I, -SF5, hydroxyl, cyano, nitro, amino, amido, hydrazine, hydrazone, carboxylic acid group or its salt, sulfonic acid group or its salt, phosphate group or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 alkenyl, substituted or unsubstituted C2-C 60 Alkyne, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C1-C 60 Alkylthio, substituted or unsubstituted C3-C 10 cycloalkyl, substituted or unsubstituted C1-C 10 Heterocyclic alkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl, substituted or unsubstituted C6-C 60 aryl, substituted or unsubstituted C7-C 60 Alkyl aryl, substituted or unsubstituted C7-C 60 arylalkyl, substituted or unsubstituted C6-C 60 aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted C2-C 60 Alkyl heteroaryl, substituted or unsubstituted C2-C 60 Heteroarylalkyl, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thiols, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, -Si(Q 301 (Q) 302 (Q) 303 -N(Q) 301 (Q) 302 -B(Q) 301 (Q) 302 -C(=O)(Q) 301 -S(=O)2(Q) 301 -S(=O)(Q) 301 -P(Q) 301 (Q) 302 -P(=O)(Q) 301 (Q) 302 ), or -P(=S)(Q 301 (Q) 302 ), xb21 is an integer from 1 to 5. Q 301 To Q 303 Each independently is C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio, phenyl, biphenyl, terphenyl, or naphthyl, and At least one of conditions 1 to 3 is satisfied: Condition 1 Ar in E-1 301 L 301 and R 301 One or more of which independently include C1-C atoms containing π-electron-deficient nitrogen. 60 Cyclic groups, Condition 2 In E-1, L 301 It is a group represented by one of the following formulas: Condition 3 R in E-1 301 It is cyano, -S(=O)2(Q 301 -S(=O)(Q) 301 -P(=O)(Q) 301 (Q) 302 ), or -P(=S)(Q 301 (Q) 302 ).

14. The organic light-emitting device according to claim 12, wherein... The hole transport entity comprises a compound represented by formula H-1: Formula H-1 in, In equations H-1, 11, and 12, L 401 A single bond, or an unsubstituted or π-electron-rich C3-C bond substituted as follows 60 Cyclic groups: deuterium, C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiophene, benzo[9,10]phenanthryl, biphenyl, terphenyl, tetraphenyl, -Si(Q 401 (Q) 402 (Q) 403 ), or a combination thereof, xc1 is an integer from 1 to 10, where when xc1 is 2 or greater, two or more L 401 Whether they are the same or different, Ar 401 For groups represented by formula 11 or 12, Ar 402 It is a group represented by formula 11 or 12, or a π-electron-rich C3-C that is unsubstituted or substituted as follows. 60 Cyclic groups: deuterium, C1-C 10 Alkyl, C1-C 10 Alkoxy, C1-C 10 Alkylthio, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, benzo[9,10]phenanthryl, biphenyl, terphenyl, tetraphenyl, or combinations thereof. xc11 is an integer from 1 to 10, where when xc11 is 2 or greater, two or more Ar... 402 Whether they are the same or different, CY 401 and CY 402 Each is an independent C3-C rich in π electrons. 60 Cyclic groups, A 21 For single bonds, O, S, N(R) 411 ), C(R 411 (R) 412 ), or Si(R) 411 (R) 412 ), A 22 For single bonds, O, S, N(R) 411 ), C(R 411 (R) 412 ), or Si(R) 411 (R) 412 ), A in Equation 12 21 and A 22 At least one of them is not a single bond. R 401 R 402 R 411 and R 412 Each independently is: Hydrogen, deuterium, C1-C 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthio; Each of the following C1-C is replaced: 20 Alkyl, C1-C 20 alkoxy, or C1-C 20 Alkylthioyl: deuterium, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, or combinations thereof; C3-C electrons that are not substituted or are substituted as follows 60 Cyclic groups: deuterium, C1-C 20 Alkyl, C1-C 20 Alkoxy, C1-C 20 Alkylthio, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiophene, biphenyl, or combinations thereof; or -If(Q 404 )(Q 405 )(Q 406 ), e1 and e2 are each independent integers from 0 to 10. Q 401 To Q 406 Each is independently hydrogen, deuterium, C1-C 20 Alkyl, phenyl, naphthyl, fluorenyl, carbazole, dibenzofuranyl, dibenzothiopheneyl, biphenyl, terphenyl, or benzo[9,10]phenanthryl, and * indicates a binding site with an adjacent atom.

15. The organic light-emitting device according to claim 12, wherein... Based on weight, the amount of hole transport entities in the emitter layer is greater than or equal to the amount of electron transport entities in the emitter layer.

16. The organic light-emitting device according to claim 11, wherein... Based on weight, the amount of the main component in the emission layer is greater than the total amount of the first compound and the second compound in the emission layer.

17. The organic light-emitting device according to claim 1, wherein... Based on weight, the amount of the first compound in the emission layer is greater than or equal to the amount of the second compound in the emission layer.

18. The organic light-emitting device according to claim 1, wherein... The emission layer does not include metal.

19. The organic light-emitting device according to claim 1, wherein... The organic layer further includes a hole transport region located between the first electrode and the emitter layer; and an electron transport region located between the emitter layer and the second electrode. The hole transport region includes at least one of a hole injection layer, a hole transport layer, or an electron blocking layer, and The electron transport region includes at least one of a hole blocking layer, an electron transport layer, or an electron injection layer.

20. An electronic device, including an organic light-emitting device according to any one of claims 1 to 19.

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