Organic light emitting device

Abstract

The present application provides an organic light emitting device, comprising a first electrode; a second electrode facing the first electrode; an organic layer comprising an emission layer disposed between the first electrode and the second electrode and an electron transport zone between the second electrode and the emission layer; and a first auxiliary layer disposed between the emission layer and the electron transport zone, wherein the electron transport zone comprises a hole blocking layer between the second electrode and the first auxiliary layer, the emission layer comprises a host, and the first auxiliary layer comprises a first compound, and the organic light emitting device satisfies Equation 1, <Equation 1> T1(C1) ≤ T1(H), wherein, in Equation 1, T1(C1) is the lowest excited triplet state energy level of the first compound, and T1(H) is the lowest excited triplet state energy level of the host; wherein, when the host and the first compound are the same as each other, the first auxiliary layer is composed of only the first compound.

Description

[0001] Cross-reference to related applications

[0002] This application claims priority and benefit to Korean Patent Application No. 10-2019-0022576, filed on February 26, 2019, which is incorporated herein by reference for all purposes as if fully set forth herein. Technical Field

[0003] Exemplary embodiments of the present invention generally relate to organic light-emitting devices. Background Technology

[0004] Organic light-emitting devices are self-emitting devices that generate full-color images, and compared with devices in the field, they also have wide viewing angles, high contrast, short response times, and superior characteristics in terms of brightness, driving voltage, and response speed.

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

[0006] The information disclosed above in this background section is only for understanding the background of the inventive concept, and therefore may contain information that does not constitute prior art. Summary of the Invention

[0007] An apparatus constructed according to an exemplary embodiment of the present invention can provide an organic light-emitting device including an auxiliary layer disposed between an emitting layer and a hole-blocking layer and comprising a material having a minimum excited triplet energy level within a predetermined range.

[0008] Other features of the inventive concept will be set forth in the following description and will be apparent in part from the description, or may be learned by practice of the inventive concept.

[0009] According to one or more exemplary embodiments of the present invention, an organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; an organic layer including an emission layer between the first electrode and the second electrode and an electron transport region between the second electrode and the emission layer; and a first auxiliary layer between the emission layer and the electron transport region. The electron transport region includes a hole-blocking layer between the second electrode and the first auxiliary layer, the emission layer includes a host, and the first auxiliary layer may include a first compound. The organic light-emitting device satisfies Equation 1, wherein when the host and the first compound are identical, the first auxiliary layer is composed solely of the first compound.

[0010] Equation 1

[0011] T1(C1)≤T1(H).

[0012] In Equation 1, T1(C1) is the lowest excited triplet energy level of the first compound, and T1(H) is the lowest excited triplet energy level of the host.

[0013] The emission layer can be in direct contact with the first auxiliary layer.

[0014] The first auxiliary layer may exist at the interface between the emission layer and the hole blocking layer.

[0015] The thickness of the first auxiliary layer can be approximately to approximately Within the range.

[0016] In one implementation, T1(H) can be 3.0 eV or less than 3.0 eV.

[0017] The emission layer can emit green fluorescence or delayed fluorescence with a maximum emission wavelength in the range of about 490 nm to about 590 nm.

[0018] The emitter layer may further contain dopants.

[0019] The dopant can emit fluorescence or delayed fluorescence.

[0020] The electron transport region may further include an electron transport layer between the second electrode and the hole blocking layer, and the electron transport layer may contain an electron transport material.

[0021] The organic light-emitting device may further include a hole transport region between the first electrode and the emitting layer, and the hole transport region may contain a hole transport material.

[0022] The hole transport region may include an electron blocking layer.

[0023] The organic light-emitting device may further include a second auxiliary layer between the electron blocking layer and the emitting layer, and the second auxiliary layer may contain a second compound and satisfy Equation 2, wherein when the host compound contained in the emitting layer and the second compound are the same as each other, the second auxiliary layer may be composed solely of the second compound:

[0024] Equation 2

[0025] T1(C2)≤T1(H).

[0026] In Equation 2, T1(C2) is the lowest excited triplet energy level of the second compound, and T1(H) is the lowest excited triplet energy level of the host.

[0027] The emission layer can be in direct contact with the second auxiliary layer.

[0028] The second auxiliary layer may exist at the interface between the emission layer and the electron blocking layer.

[0029] The hole transport region may further include a hole transport layer between the first electrode and the hole blocking layer, and the hole transport layer may contain a hole transport material.

[0030] The subject can be a single subject.

[0031] The subject can be a hybrid subject comprising a hole transport subject and an electron transport subject.

[0032] The organic light-emitting device may further include a hole transport region between the first electrode and the emission layer. The hole transport region may include an electron blocking layer. The body may be a hybrid body containing a hole transport body and an electron transport body. The hole transport body may exist in the emission layer on a side closer to the electron blocking layer, and the electron transport body may exist in the emission layer on a side closer to the hole blocking layer.

[0033] In one embodiment, the first compound may be represented by one selected from Formula 1 to Formula 3:

[0034] <Formula 1>

[0035] [Ar1] a1 -[(L1) a11 -R1] a21

[0036] <Formula 2>

[0037]

[0038] <Formula 3>

[0039]

[0040] In Equations 1 to 3, Ar1 can be substituted or unsubstituted C5-C. 60 The carbocyclic group is either substituted or unsubstituted C1-C. 60 Heterocyclic groups,

[0041] a1 can be 1, 2, or 3.

[0042] L1 and L 11 To L 14 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0043] L 15 It can be selected from *-O-*', *-S-*', *-N(Q) 11 )-*', substituted or unsubstituted C1-C 20 alkylene groups, substituted or unsubstituted C2-C 20 alkenyl groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0044] a11 can be an integer from 0 to 5.

[0045] b11 to b14 can each be an integer from 0 to 3 independently.

[0046] b15 can be an integer from 1 to 10.

[0047] R1 can be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amido group, hydrazine group, hydrazone group, substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 alkenyl groups, substituted or unsubstituted C2-C 60 alkynyl group, substituted or unsubstituted C1-C 60 alkoxy group, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heterocyclic groups, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1), and -P(=O)(Q1)(Q2),

[0048] R 11 To R 14 and Q 11 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

[0049] a21 can be an integer from 1 to 5, and

[0050] Q1 to Q3 can each be independently selected from C1-C 10Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0051] In the implementation scheme, Ar1 can be selected from:

[0052] Carbazole group, benzocarbazole group, dibenzocarbazole group, indole group, benzoindole group, dibenzoindole group, triazine group, furan group, acridine group, phenoxazine group and phenothiazine group; and

[0053] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q) 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 At least one substituted carbazole group, benzo[a]carbazole group, dibenzo[a]carbazole group, indole group, benzo[a]indole group, dibenzo[a]indole group, triazine group, furan group, acridine group, phenoxazine group, and phenothiazine group, and

[0054] Q 31 To Q 33 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0055] According to another exemplary embodiment of the present invention, the display device may include: a thin-film transistor including a source electrode, a drain electrode and an active layer; and the organic light-emitting device, wherein the first electrode of the organic light-emitting device may be electrically connected to one of the source electrode and the drain electrode.

[0056] It should be understood that both the foregoing general description and the following detailed description are exemplary and explanatory, and are intended to provide further explanation of the claimed invention. Attached Figure Description

[0057] The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification. The drawings illustrate exemplary embodiments of the invention and, together with the description, serve to explain the inventive concept.

[0058] These and / or other aspects will become apparent and more readily understood from the following description of the embodiments in conjunction with the accompanying drawings, wherein:

[0059] Figure 1 This is a schematic view of the organic light-emitting device according to the implementation plan;

[0060] Figure 2 A schematic view of an organic light-emitting device according to an embodiment; and

[0061] Figure 3 This is a graph showing the lifespan of the organic light-emitting devices of Examples 1 and 2, and Comparative Examples 1 to 3. Detailed Implementation

[0062] In the following description, numerous specific details are set forth for purposes of explanation in order to provide a thorough understanding of various exemplary embodiments or implementations of the invention. As used herein, “implementation” and “implementation” are interchangeable terms and are non-limiting examples of apparatus or methods employing one or more of the inventive concepts disclosed herein. However, it will be apparent, however, that various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other instances, well-known structures and apparatuses are shown in block diagram form to avoid unnecessarily obscuring the various exemplary embodiments. Furthermore, the various exemplary embodiments may be different, but are not necessarily exclusive. For example, the specific shape, configuration, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0063] Unless otherwise stated, the exemplary embodiments illustrated are to be understood as providing exemplary features of various details of some ways in which the inventive concept can be implemented in practice. Therefore, unless otherwise stated, features, components, modules, layers, films, panels, areas and / or aspects of various embodiments (hereinafter individually or collectively referred to as “elements”) may be combined, separated, interchanged and / or rearranged in other ways without departing from the inventive concept.

[0064] Crosshairs and / or shading are typically used in accompanying drawings to clarify boundaries between adjacent elements. Thus, the presence or absence of crosshairs or shading does not express or indicate any preference or need for particular materials, material properties, dimensions, proportions, commonalities between illustrated elements, and / or any other characteristics, properties, or characteristics of the elements, unless otherwise specified. Furthermore, in the accompanying drawings, the dimensions and relative dimensions of elements may be enlarged for clarity and / or descriptive purposes. A specific process sequence may be performed differently from the described sequence when exemplary embodiments can be implemented differently. For example, two consecutively described processes may be performed substantially simultaneously or in the reverse order of description. Moreover, the same reference numerals denote the same elements.

[0065] When an element, such as a layer, is referred to as being "on," "connected to," or "attached to" another element or layer, it can be directly on, directly connected to, or directly attached to the other element or layer, or there can be an intermediate element or layer. However, when an element or layer is referred to as being "directly on," "directly connected to," or "directly attached to," there is no intermediate element or layer. Therefore, the term "connected" can refer to a physical connection, an electrical connection, and / or a fluid connection, with or without an intermediate element. Furthermore, the D1-axis, D2-axis, and D3-axis are not limited to the three axes of a Cartesian coordinate system, such as the x-axis, y-axis, and z-axis, and can be interpreted in a broader sense. For example, the D1-axis, D2-axis, and D3-axis can be perpendicular to each other, or can represent different directions that are not perpendicular to each other. For the purposes of this disclosure, "at least one of X, Y, and Z" and "at least one selected from the group consisting of X, Y, and Z" can be interpreted as having only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as XYZ, XYY, YZ, and ZZ. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0066] Although the terms “first,” “second,” etc., may be used herein to describe various types of elements, these elements should not be limited by these terms. These terms are used to distinguish one element from another. Therefore, without departing from the teachings of this disclosure, the first element discussed below may be referred to as the second element.

[0067] Spatial relative terms such as “below,” “under,” “lower,” “lower,” “above,” “upper,” “above,” “higher,” and “side” (e.g., as in “sidewall”) may be used herein for descriptive purposes and thereby to describe the relationship of one element to another, as illustrated in the accompanying drawings. Spatial relative terms are intended to include different orientations of the equipment in use, operation, and / or manufacture other than those described in the drawings. For example, if the equipment in the drawings is flipped, an element described as “below” or “under” other elements or features would be positioned “above” other elements or features. Thus, the exemplary term “below” can include both the upward and downward directions. Furthermore, the equipment may be oriented in other ways (e.g., rotated 90 degrees or in other directions), and in such cases, the spatial relative descriptive symbols used herein are interpreted accordingly.

[0068] The terminology used herein is for the purpose of describing particular embodiments and is not intended to be limiting. As used herein, the singular forms “a,” “an,” and “the” are intended to also include the plural forms unless the context clearly indicates otherwise. Furthermore, the terms “comprise,” “comprising,” “include,” and / or “including,” when used in this specification, indicate the presence of stated features, integers, steps, operations, elements, components, and / or groups thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof. It should also be noted that, as used herein, the terms “substantially,” “about,” and other similar terms are used as approximations and not as terms of degree, and thus are used to explain inherent deviations in measurements, calculations, and / or provided values ​​that would be recognized by one of ordinary skill in the art.

[0069] Unless otherwise defined, all terms used herein (including technical and scientific terms) shall have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure pertains. Terms, such as those defined in commonly used dictionaries, shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and shall not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0070] In the following description, exemplary embodiments are described in detail with reference to the accompanying drawings, in which the same reference numerals denote the same elements, and their redundant explanations will not be provided herein.

[0071] Preparation in which compounds are deposited on a quartz substrate to The sample was sampled with a thickness of [thickness value], and the photoluminescence spectrum of the sample was obtained at a temperature of 4K. The first peak of the photoluminescence spectrum (the peak with the shortest wavelength) was analyzed to calculate the lowest excited triplet energy level (T1 level).

[0072] As used herein, the term "organic layer" refers to a single layer and / or multiple layers disposed between the anode and cathode of an organic light-emitting device. The materials included in the "organic layer" are not limited to organic materials.

[0073] As used herein, the expression "(organic layer) contains at least one compound" can include cases where "(organic layer) contains the same compound represented by Formula 1" or cases where "(organic layer) contains two or more different compounds represented by Formula 1".

[0074] Exemplary embodiments of the inventive concept will be described in detail below with reference to the accompanying drawings.

[0075] Figure 1 and Figure 2 These are schematic diagrams of organic light-emitting devices 10 and 20 according to exemplary embodiments. Organic light-emitting devices 10 and 20 may each include a first electrode 110, an emitting layer 150, and a second electrode 190.

[0076] refer to Figure 1 and Figure 2 Organic light-emitting devices 10 and 20 may each include: a first electrode 110; a second electrode 190 facing the first electrode 110; an organic layer including an emission layer 150 between the first electrode 110 and the second electrode 190 and an electron transport region 170 between the second electrode 190 and the emission layer 150; and a first auxiliary layer 160 between the emission layer 150 and the electron transport region 170, wherein the electron transport region 170 may include a hole blocking layer 171 between the second electrode 190 and the first auxiliary layer 160, the emission layer 150 may include a host, and the first auxiliary layer 160 may include a first compound, and the organic light-emitting device may satisfy Equation 1, wherein when the host and the first compound are identical, the first auxiliary layer 160 may be composed solely of the first compound:

[0077] Equation 1

[0078] T1(C1)≤T1(H).

[0079] In equation 1,

[0080] T1(C1) is the lowest excited triplet energy level of the first compound, and

[0081] T1(H) is the lowest excited triplet energy level of the host.

[0082] As described above, when the first auxiliary layer 160 is disposed between the emission layer 150 and the hole blocking layer 171, and the lowest excited triplet energy level (T1(C1)) of the first compound contained in the first auxiliary layer 160 is less than or equal to the lowest excited triplet energy level (T1(H)) of the host contained in the emission layer 150, the lifetime of the organic light-emitting device can be improved by adjusting the triplet excitons in the light-emitting region formed at the interface between the emission layer 150 and the hole blocking layer 171, and the concentration of triplet excitons can be reduced by triplet quenching.

[0083] The first compound contained in the first auxiliary layer 160 is not particularly limited, as long as the first compound is within the range satisfying Equation 1. As described above, when the first compound is the same as the host compound contained in the emission layer 150, the first auxiliary layer 160 may be composed solely of the first compound. Since the first auxiliary layer 160 is composed solely of the first compound, the lifetime of the organic light-emitting device can be improved by effectively inducing triplet exciton reduction for the same compound, without reducing device efficiency or increasing driving voltage.

[0084] Hole blocking layer 171 differs from electron transport layer 172 described below and contains hole blocking material. Hole blocking layer 171 can be understood by referring to the description provided below.

[0085] Since organic light-emitting devices 10 and 20 each include a separate first auxiliary layer 160 that is different from the electron transport layer 172 and is arranged between the hole blocking layer 171 and the emission layer 150, triplet excitons that are gathered in the light emission region (recombination region) through the first auxiliary layer can be dispersed, and excitons that discharge through the hole blocking layer to the electron transport layer can be blocked, thereby improving the efficiency and lifespan of the organic light-emitting device.

[0086] The emission layer 150 can be in direct contact with the first auxiliary layer 160. For example, the first auxiliary layer 160 can exist at the interface between the emission layer 150 and the hole blocking layer 171.

[0087] In this way, organic light-emitting devices 10 and 20 can substantially block excitons generated in the emission layer 150 from moving to the electron transport region 170 without participating in light emission, thereby increasing the triplet concentration in the emission layer 150. Therefore, the efficiency of the organic light-emitting device can be improved.

[0088] To achieve the effects described above, the emission layer 150 and the first auxiliary layer 160 are essentially in direct contact with each other, and no other layers should be arranged between the emission layer 150 and the first auxiliary layer 160.

[0089] In one exemplary embodiment, the thickness of the first auxiliary layer 160 can be approximately to approximately Within this range, when the thickness of the first auxiliary layer 160 is within this range, the desired efficiency improvement can be achieved without increasing the driving voltage of the organic light-emitting device.

[0090] In one exemplary embodiment, the emission layer 150 may emit green fluorescence or delayed fluorescence having a maximum emission wavelength in the range of about 490 nm to about 590 nm.

[0091] In one exemplary embodiment, the emitter layer 150 may further contain dopants.

[0092] In one exemplary embodiment, T1(H) can be about 3.0 eV or less. For example, T1(H) can be about 2.7 V or less. Furthermore, the singlet and triplet energies of the dopant can satisfy the following equation.

[0093] ΔEst=S1–T1<0.3eV (ΔEst is the difference between the singlet energy and the triplet energy).

[0094] In this way, organic light-emitting devices can emit thermally activated delayed fluorescence (TADF).

[0095] For example, dopants can emit fluorescence or delayed fluorescence. For example, dopants can emit delayed fluorescence.

[0096] The dopant for delayed fluorescence emission can be disposed at the interface between the emitting layer 150 and the first auxiliary layer 160 or the second auxiliary layer 140. Therefore, the light emission site can exist at the interface between the emitting layer 150 and the first auxiliary layer 160 or the second auxiliary layer 140.

[0097] In one exemplary embodiment, the electron transport region 170 may further include an electron transport layer 172 between the second electrode 190 and the hole blocking layer 171, and the electron transport layer 172 may contain an electron transport material. The electron transport layer 172 can be understood by referring to the description provided below.

[0098] refer to Figure 2 The organic light-emitting device 20 may further include a hole transport region 130 between the first electrode 110 and the emitting layer 150, and the hole transport region 130 may contain a hole transport material. The hole transport region 130 can be understood by referring to the description provided below.

[0099] Hole transport region 130 may include electron blocking layer 131. Electron blocking layer 131 differs from hole transport layer 132 described below and contains electron blocking material. Electron blocking layer 131 can be understood by referring to the description provided below.

[0100] The organic light-emitting device 20 may further include a second auxiliary layer 140 between the electron blocking layer 131 and the emitting layer 150, and the second auxiliary layer 140 may contain a second compound. The organic light-emitting device 20 may satisfy Equation 2, wherein when the host and the second compound contained in the emitting layer 150 are identical, the second auxiliary layer may be composed solely of the second compound:

[0101] Equation 2

[0102] T1(C2)≤T1(H).

[0103] In equation 2,

[0104] T1(C2) is the lowest excited triplet energy level of the second compound, and

[0105] T1(H) is the lowest excited triplet energy level of the host.

[0106] In one exemplary embodiment, the emitter layer 150 may be in direct contact with the second auxiliary layer 140. For example, the second auxiliary layer 140 may be present at the interface between the emitter layer 150 and the electron blocking layer 131.

[0107] The other contents of the second auxiliary layer 140 can be understood by referring to the description of the first auxiliary layer 160.

[0108] In one exemplary embodiment, the hole transport region 130 may further include a hole transport layer 132 between the first electrode 110 and the electron blocking layer 131, and the hole transport layer 132 may contain a hole transport material.

[0109] In one exemplary embodiment, the subject included in the emission layer 150 can be a single subject.

[0110] In one or more exemplary embodiments, the body included in the emission layer 150 may be a hybrid body comprising a hole transport body and an electron transport body.

[0111] In one exemplary embodiment, the organic light-emitting device 20 may further include a hole transport region 130 between the first electrode 110 and the emitting layer 150, and the hole transport region 130 may include an electron blocking layer 131. The body may be a hybrid body comprising a hole transport body and an electron transport body. The hole transport body may be present on the side of the emitting layer 150 adjacent to the electron blocking layer 131, and the electron transport body may be present on the side of the emitting layer 150 adjacent to the hole blocking layer 161.

[0112] In the following text, reference will be made to Figure 1 and Figure 2Describes components of an organic light-emitting device according to one or more exemplary embodiments.

[0113] refer to Figure 1 and Figure 2 The substrate may be additionally disposed below the first electrode 110 or above the second electrode 190. The substrate may be a glass substrate or a plastic substrate, each possessing excellent mechanical strength, thermal stability, transparency, surface smoothness, ease of handling, and water resistance.

[0114] The first electrode 110 can be formed by depositing or sputtering a material for forming the first electrode 110 on a substrate. When the first electrode 110 is an anode, the material used to form the first electrode 110 can be selected from materials with high work function to facilitate hole injection.

[0115] The first electrode 110 can be a reflective electrode, a semi-reflective electrode, or a transmissive electrode. When the first electrode 110 is a transmissive electrode, the material used to form the first electrode can be selected from indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), and any combination thereof, but the exemplary embodiments of the present invention are not limited thereto. In one or more exemplary embodiments, when the first electrode 110 is a semi-transmissive electrode or a reflective electrode, the material used to form the first electrode can be selected from magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), and any combination thereof, but the exemplary embodiments of the present invention are not limited thereto.

[0116] The first electrode 110 may have a single-layer structure or a multi-layer structure including two or more layers. For example, the first electrode 110 may have a three-layer structure of ITO / Ag / ITO, but the structure of the first electrode 110 is not limited to this.

[0117] The emitter layer 150 may be disposed on the first electrode 110. An organic layer may be included in the electron transport region 170 between the emitter layer 150 and the second electrode 190.

[0118] The organic layer may further include a hole transport region 130 between the first electrode 110 and the emitter layer 150.

[0119] Hole transport region 130 may have i) a single-layer structure comprising a single layer of a single material, ii) a single-layer structure comprising a single layer of multiple different materials, or iii) a multi-layer structure comprising multiple layers of multiple different materials.

[0120] The hole transport region 130 may include at least one layer selected from the electron blocking layer 131, the hole transport layer 132, and the emission assist layer.

[0121] For example, the hole transport region 130 may have a single-layer structure comprising a single layer containing a variety of different materials, or a multi-layer structure, wherein the multi-layer structure has a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission auxiliary layer structure, a hole injection layer / emission auxiliary layer structure, a hole injection layer / hole transport layer / electron blocking layer structure, a hole injection layer / hole transport layer / emission auxiliary layer / electron blocking layer structure, a hole injection layer / emission auxiliary layer / electron blocking layer structure, or a hole transport layer / emission auxiliary layer / electron blocking layer structure, wherein for each structure, the constituent layers are stacked sequentially from the first electrode 110 in this prescribed order, but the exemplary embodiments of the present invention are not limited thereto.

[0122] Hole transport region 130 may contain at least one selected from m-MTDATA, TDATA, 2-TNATA, NPB (NPD), β-NPB, TPD, spiro-TPD, spiro-NPB, methylated NPB, TAPC, HMTPD, 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), compounds represented by formula 201, and compounds represented by formula 202:

[0123]

[0124] <Form 201>

[0125]

[0126] <Form 202>

[0127]

[0128] In equations 201 and 202,

[0129] L 201 To L 204 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0130] L 205 It can be selected from *-O-*', *-S-*', *-N(Q) 201 )-*', substituted or unsubstituted C1-C 20 alkylene groups, substituted or unsubstituted C2-C 20 alkenyl groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0131] xa1 to xa4 can each be an integer from 0 to 3 independently.

[0132] xa5 can be an integer from 1 to 10, and

[0133] R 201 To R 204 and Q 201 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

[0134] For example, R in Equation 202 201 and R 202 It can be optionally linked via a single bond, a dimethyl-methylene group, or a diphenyl-methylene group, and R in formula 202. 203 and R 204It can be optionally linked via a single bond, a dimethyl-methylene group, or a diphenyl-methylene group.

[0135] In one exemplary embodiment, in formulas 201 and 202,

[0136] L 201 To L 205 Each can be selected independently from:

[0137] Phenylidene group, pentylene group, indenyl group, naphthyl group, chamomile cycloyl group, heptylene group, adamantyl group, acenaphthene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthroline group, anthracene group, fluorenyl group, benzo[a]phenanthrene group, pyrene group, etc. Benzyl group, tetraphenyl group, puryl group, peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, rubidyl group, styrenyl group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophenyl group and pyridylyl group; and

[0138] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C1-C 10 Alkyl-substituted phenyl groups, -F-substituted phenyl groups, pentanenyl groups, indole groups, naphthyl groups, chamomile cycloyl groups, heptenyl groups, indoleyl groups, acenaphthyl groups, fluorenyl groups, spiro-difluorenyl groups, benzo[a]fluorenyl groups, dibenzo[a]fluorenyl groups, phenanthrenyl groups, anthraceneyl groups, fluoranthraceneyl groups, benzo[a]phenanthreneyl groups, pyrene groups, Benzyl group, tetraphenyl group, furanyl group, perylyl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, rutinyl group, kosyl group, ovoidyl group, thiophenyl group, furanyl group, carbazoleyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazoleyl group, dibenzocarbazoleyl group, dibenzothiophenyl group, pyridyl group, -Si(Q) 31(Q) 32 (Q) 33 ) and -N(Q 31 (Q) 32 At least one substituted phenylene group, pentylene group, indenyl group, naphthyl group, chamomile cycloyl group, heptylene group, adamantyl group, acenaphthene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenenthene group, anthracene group, fluorenyl group, benzo[a]phenanthrene group, pyrene group, etc. The following groups are listed: alkyl group, tetraphenylene group, purylene group, perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, rubidium benzoate group, styrenyl group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophenyl group, and pyridylene group.

[0139] Q 31 To Q 33 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0140] In one or more exemplary embodiments, xa1 to xa4 can each be 0, 1 or 2 independently.

[0141] In one or more exemplary embodiments, xa5 can be 1, 2, 3 or 4.

[0142] In one or more exemplary embodiments, R 201 To R 204 and Q 201 Each can be selected independently from:

[0143] Phenyl group, biphenyl group, terphenyl group, pentanenyl group, indole group, naphthyl group, chamomile cycloyl group, heptenyl group, indoleyl group, acenaphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthreneyl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthreneyl group, pyrene group, Benzyl group, tetraphenyl group, furanyl group, perylyl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, rutinyl group, kosyl group, ovoidyl group, thiophenyl group, furanyl group, carbazoleyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazoleyl group, dibenzocarbazoleyl group, dibenzothiophenyl group and pyridyl group; and

[0144] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C1-C 10 Alkyl-substituted phenyl groups, -F-substituted phenyl groups, pentanenyl groups, indole groups, naphthyl groups, chamomile cycloyl groups, heptenyl groups, indoleyl groups, acenaphthyl groups, fluorenyl groups, spiro-difluorenyl groups, benzo[a]fluorenyl groups, dibenzo[a]fluorenyl groups, phenanthrenyl groups, anthraceneyl groups, fluoranthraceneyl groups, benzo[a]phenanthreneyl groups, pyrene groups, Benzyl group, tetraphenyl group, furanyl group, perylyl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, rutinyl group, kosyl group, ovoidyl group, thiophenyl group, furanyl group, carbazoleyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazoleyl group, dibenzocarbazoleyl group, dibenzothiophenyl group, pyridyl group, -Si(Q) 31 (Q) 32 (Q) 33 ) and -N(Q 31 (Q) 32 At least one substituted phenyl group, biphenyl group, terphenyl group, pentanenyl group, indole group, naphthyl group, chamomile cycloyl group, heptenyl group, indoleyl group, acenaphthenic group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthreneyl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthreneyl group, pyreneyl group, The following groups are listed: alkyl group, tetraphenyl group, furanyl group, perylyl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, rutinyl group, kosyl group, ovoidyl group, thiophenyl group, furanyl group, carbazoleyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazoleyl group, dibenzocarbazoleyl group, dibenzothiophenyl group, and pyridyl group.

[0145] Q 31 To Q 33 Same as described above.

[0146] In one or more exemplary embodiments, R selected from Formula 201 201 To R 203 At least one of them can be independently selected from:

[0147] Fluorenyl group, spiro-difluorenyl group, carbazole group, dibenzofuranyl group and dibenzothiophenyl group; and

[0148] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C1-C 10 At least one substituted fluorenyl group, spiro-difluorenyl group, carbazole group, dibenzofuranyl group, and dibenzothiophene group selected from the following groups: alkyl-substituted phenyl group, -F-substituted phenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, carbazole group, dibenzofuranyl group, and dibenzothiophene group.

[0149] However, the exemplary embodiments of the present invention are not limited thereto.

[0150] In one or more exemplary embodiments, in formula 202, i)R 201 and R 202 It can be connected via a single key, and / or ii)R 203 and R 204 It can be connected via a single key.

[0151] In one or more exemplary embodiments, R selected from Formula 202 201 To R 204 At least one of them can be independently selected from:

[0152] Carbazolium group; and

[0153] Selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C1-C 10 At least one substituted carbazoyl group selected from the following groups: alkyl-substituted phenyl group, -F-substituted phenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, carbazoyl group, dibenzofuranyl group, and dibenzothiophenyl group.

[0154] However, the exemplary embodiments of the present invention are not limited thereto.

[0155] The compound represented by formula 201 can also be represented by formula 201A:

[0156] <Form 201A>

[0157]

[0158] In one exemplary embodiment, the compound represented by formula 201 may be represented by the following formula 201A(1), but the exemplary embodiments of the present invention are not limited thereto:

[0159] <Formula 201A(1)>

[0160]

[0161] In one exemplary embodiment, the compound represented by formula 201 may be represented by the following formula 201A-1, but the exemplary embodiments of the present invention are not limited thereto:

[0162] <Form 201A-1>

[0163]

[0164] In one exemplary embodiment, the compound represented by formula 202 can be represented by formula 202A:

[0165] <Form 202A>

[0166]

[0167] In one exemplary embodiment, the compound represented by formula 202 can be represented by formula 202A-1:

[0168] <Formula 202A-1>

[0169]

[0170] L 201 To L 203 xa1 to xa3, xa5 and R 202 To R 204 Same as described above,

[0171] R 211 and R 212 They can be independently related to R. 203 The same definition, and

[0172] R 213 To R 217 Each group can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, cyclopentyl group, cyclohexyl group, cycloheptyl group, cyclopentenyl group, cyclohexenyl group, phenyl group, biphenyl group, terphenyl group, C1-C 10 Alkyl-substituted phenyl groups, -F-substituted phenyl groups, pentanenyl groups, indole groups, naphthyl groups, chamomile cycloyl groups, heptenyl groups, indoleyl groups, acenaphthyl groups, fluorenyl groups, spiro-difluorenyl groups, benzo[a]fluorenyl groups, dibenzo[a]fluorenyl groups, phenanthrenyl groups, anthraceneyl groups, fluoranthraceneyl groups, benzo[a]phenanthreneyl groups, pyrene groups, The group includes benzo[a], tetraphenyl[b], furan[b], peryl[b], pentaphenyl[a], hexaphenyl[b], pentaphenyl[a], rutin[b], koj[b], ovoid[b], thiophen[b], furan[b], carbazo[b], indole[b], isoindole[b], benzofuran[b], benzothiophen[b], dibenzofuran[b], dibenzothiophen[b], benzocarbazo[b], dibenzocarbazo[b], dibenzothiophen[b], dibenzothiophen[b], and pyridyl[b]

[0173] The hole transport region may contain at least one compound selected from compounds HT1 to HT39, but exemplary embodiments of the present invention are not limited thereto:

[0174]

[0175]

[0176]

[0177]

[0178] The thickness of the hole transport region 130 can be approximately to approximately Within a certain range, for example, in approximately to approximately Within the range. When the hole transport region 130 includes at least one selected from the hole injection layer and the hole transport layer 132, the thickness of the hole injection layer can be approximately to approximately Within that range, and for example, in approximately to approximately Within a certain range, and the thickness of the hole transport layer 132 can be approximately... to approximately Within that range, and for example, in approximately to approximately Within these ranges, satisfactory hole transport characteristics can be obtained without a significant increase in driving voltage when the thicknesses of the hole transport region 130, the hole injection layer, and the hole transport layer 132 are within these ranges.

[0179] The emission assist layer can increase light emission efficiency by compensating for the optical resonant distance according to the wavelength of the light emitted by the emission layer, and the electron blocking layer 131 can block the flow of electrons from the electron transport region 170. The emission assist layer and the electron blocking layer 131 may contain materials as described above.

[0180] In addition to these materials, the hole transport region 130 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 130.

[0181] The charge-generating material can be, for example, a p-doped agent.

[0182] In one exemplary embodiment, the p-dopant may have a lowest unoccupied molecular orbital (LUMO) energy level of -3.5 eV or less than -3.5 eV.

[0183] p-dopers may include at least one selected from quinone derivatives, metal oxides, and compounds containing cyano groups, but exemplary embodiments of the present invention are not limited thereto.

[0184] In one exemplary embodiment, the p-doper may include at least one selected from the following:

[0185] Quinone derivatives, such as tetracyanoquinone dimethyl (TCNQ) or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinone dimethyl (F4-TCNQ);

[0186] Metal oxides, such as tungsten oxide or molybdenum oxide;

[0187] 1,4,5,8,9,12-hexaazatriphenylene-hexacarbamate (HAT-CN); and

[0188] The compound represented by formula 221,

[0189] However, the exemplary embodiments of the present invention are not limited thereto:

[0190]

[0191] In Equation 221,

[0192] R 221 To R 223 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, wherein the group selected from R 221 To R 223 At least one of them may independently have a C1-C group selected from cyano group, -F, -Cl, -Br, -I, or a C1-C group substituted with -F. 20 Alkyl groups, C1-C substituted with -Cl 20 Alkyl groups, C1-C substituted with -Br 20 Alkyl groups and C1-C substituted with -I 20 At least one substituent in an alkyl group.

[0193] The electron blocking material contained in the electron blocking layer 131 can satisfy 2.5 eV ≤ T1(BL) ≤ 3.5 eV, but the exemplary embodiments of the present invention are not limited thereto. When the electron blocking material is within this range, excitons can be substantially trapped in the emission layer, and the excitons can fully participate in light emission.

[0194] Electron blocking materials may include, for example, carbazole derivatives (e.g., N-phenylcarbazole, polyvinylcarbazole), fluorene-based derivatives, triphenylamine-based derivatives (e.g., N,N'-bis(3-methylphenyl)-N,N'-diphenyl-[1,1-biphenyl]-4,4'-diamine (TPD), or 4,4',4”-tris(N-carbazolyl)triphenylamine (TCTA)), N,N'-bis(naphthyl-1-yl)-N,N'-diphenyl-benzidine (NPD), 4,4'-cyclohexylenebis[N,N-bis(4-methylphenyl)aniline] (TAPC), 4,4'-bis[N,N'-(3-tolyl)amino]-3,3'-dimethylbiphenyl (HMTPD), or mCP.

[0195] Specifically, the electron blocking material may include compounds represented by Formula 4, but the exemplary embodiments of the present invention are not limited thereto:

[0196] <Formula 4>

[0197]

[0198] In Equation 4,

[0199] X 11 It can be selected from O, S, N(R) 13 ) and C(R 13 (R) 14 ),

[0200] X 12 It can be selected from single bonds, O, S, N(R) 15 ) and C(R 15 (R) 16 ),

[0201] A 11 and A 12 Each can be independently selected from C5-C. 60 Carbocyclic groups and C1-C 60 Heterocyclic groups,

[0202] R 11 To R 16 Each group can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amido group, hydrazine group, hydrazone group, substituted or unsubstituted C1-C groups. 60 Alkyl groups, substituted or unsubstituted C2-C 60 alkenyl groups, substituted or unsubstituted C2-C 60 alkynyl group, substituted or unsubstituted C1-C 60 alkoxy group, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted C1-C 60 Heteroaryl thioyl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heterocyclic groups, -Si(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) and -P(=S)(Q1)(Q2),

[0203] b11 and b12 can each be independently selected from 1, 2, 3, 4, 5, and 6, and

[0204] Q1 to Q3 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amido group, hydrazine group, hydrazone group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C 10 cycloalkenyl groups, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 aryl group, C6-C 60 aryloxy group, C6-C 60 aryl thiols, C1-C 60 heteroaryl groups, C1-C 60 heteroaryloxy groups, C1-C 60 Heteroaryl thio groups, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, biphenyl groups, and terphenyl groups.

[0205] The electron blocking layer can be composed of a single compound or can contain a mixture of two or more different compounds.

[0206] In one exemplary embodiment, the electron blocking material may be the same as the host, but the exemplary embodiments of the present invention are not limited thereto. For example, the electron blocking material may be the same as the hole transport host, but the exemplary embodiments of the present invention are not limited thereto.

[0207] In one exemplary embodiment, the thickness (D) of the electron blocking layer 131 EB ) and the thickness of the emission layer 150 (D E ) can satisfy D E ≥D EB Specifically, the thickness (D) of the electron blocking layer 131 EB ) and the thickness of the emission layer 150 (D E ) can satisfy D E >D EB However, exemplary embodiments of the present invention are not limited thereto. When the thicknesses of the electron blocking layer 131 and the emitting layer 150 are within these ranges, the desired efficiency improvement can be achieved without increasing the driving voltage of the organic light-emitting device.

[0208] In one or more exemplary embodiments, the thickness of the electron blocking layer 131 can be approximately to approximately The thickness of the electron blocking layer 131 is within this range, but the exemplary embodiments of the present invention are not limited thereto. When the thickness of the electron blocking layer 131 is within this range, the desired efficiency improvement can be achieved without increasing the driving voltage of the organic light-emitting device.

[0209] When the organic light-emitting device 10 is a full-color organic light-emitting device, the emitting layer 150 can be patterned as a red emitting layer, a green emitting layer, or a blue emitting layer, depending on the sub-pixel. In one or more exemplary embodiments, the emitting layer 150 may have a stacked structure of two or more layers selected from red, green, and blue emitting layers, wherein the two or more layers are in contact with or spaced apart from each other. In one or more exemplary embodiments, the emitting layer may contain two or more materials selected from red-emitting, green-emitting, and blue-emitting materials, wherein the two or more materials are mixed with each other in a single layer to emit white light.

[0210] The emitting layer 150 may comprise a host and a dopant. The dopant may be a phosphorescent dopant. For example, the dopant may be a delayed fluorescence dopant.

[0211] In one exemplary embodiment, the emission layer 150 may emit green fluorescence or delayed fluorescence, each having a maximum emission wavelength of about 490 nm to about 590 nm.

[0212] Based on 100 parts by weight of the main body, the amount of dopant in the emitter layer 150 can range from about 0.01 parts by weight to about 15 parts by weight, but exemplary embodiments of the present invention are not limited thereto.

[0213] The thickness of the emission layer 150 can be approximately to approximately Within a certain range, for example, in approximately to approximately Within this range, excellent light emission characteristics can be obtained without a significant increase in driving voltage when the thickness of the emitting layer 150 is within this range.

[0214] In one or more exemplary embodiments, the body may comprise a compound represented by the following formula 301:

[0215] <Formula 301>

[0216] [Ar 301 ] xb11 -[(L 301 ) xb1 -R 301 ] xb21

[0217] In Equation 301,

[0218] Ar 301 C5-C can be substituted or unsubstituted. 60 The carbocyclic group is either substituted or unsubstituted C1-C. 60 Heterocyclic groups,

[0219] xb11 can be 1, 2, or 3.

[0220] L 301 It can be selected from substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0221] xb1 can be an integer from 0 to 5.

[0222] R 301It can be selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amido group, hydrazine group, hydrazone group, substituted or unsubstituted C1-C. 60 Alkyl groups, substituted or unsubstituted C2-C 60 alkenyl groups, substituted or unsubstituted C2-C 60 alkynyl group, substituted or unsubstituted C1-C 60 alkoxy group, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, 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 ) and -P(=O)(Q 301 (Q) 302 ),

[0223] xb21 can be an integer from 1 to 5, and

[0224] Q 301 To Q 303 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups are used, but exemplary embodiments of the present invention are not limited thereto.

[0225] In one exemplary embodiment, Ar in Formula 301 301 You can choose from:

[0226] Naphthalene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthrene group, anthracene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, Groups, tetraphenyl groups, furan groups, perylene groups, pentaphenyl groups, indene-anthracene groups, dibenzofuran groups, and dibenzothiophene groups; and

[0227] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q) 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 At least one substituted naphthyl group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenatene group, anthracene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, Groups, tetraphenyl groups, furan groups, perylene groups, pentaphenyl groups, indene-anthracene groups, dibenzofuran groups, and dibenzothiophene groups, and

[0228] Q 31 To Q 33 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups are used, but exemplary embodiments of the present invention are not limited thereto.

[0229] In Equation 301, when xb11 is two or greater than two, there are two or more Ar. 301 It can be connected via a single key.

[0230] In one or more exemplary embodiments, the compound represented by formula 301 may be represented by formula 301-1 or formula 301-2:

[0231] <Formula 301-1>

[0232]

[0233] <Formula 301-2>

[0234]

[0235] In equations 301-1 to 301-2,

[0236] A 301 To A 304 Each group can independently be a phenyl group, naphthyl group, phenanthrene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, etc. Groups, pyridine groups, pyrimidine groups, indene groups, fluorene groups, spiro-difluorene groups, benzo[a]fluorene groups, dibenzo[a]fluorene groups, indole groups, carbazole groups, benzo[a]carbazole groups, dibenzo[a]carbazole groups, furan groups, benzo[a]furan groups, dibenzo[a]furan groups, naphthofuran groups, benzo[a]naphthofuran groups, dinaphthofuran groups, thiophene groups, benzo[a]thiophene groups, dibenzo[a]thiophene groups, naphtho[a]thiophene groups, benzo[a]naphtho[a]thiophene groups, and dinaphtho[a]thiophene groups.

[0237] X 301 It can be O, S or N-[(L 304 ) xb4 -R 304 ],

[0238] R 311 To R 314 Each group can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q) 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 ),

[0239] xb22 and xb23 can each be 0, 1, or 2 independently.

[0240] L 301 xb1, R 301 and Q 31 To Q 33 Same as described above,

[0241] L 302 To L 304 They can be independently related to L 301 The same definition

[0242] xb2 to xb4 can each be independently identical to the definition of xb1, and

[0243] R 302 To R 304 They can be independently related to R. 301 The definitions are the same.

[0244] For example, in Equations 301, 301-1, and 301-2, L 301 To L 304 Each can be selected independently from:

[0245] Phenylidene group, naphthyl group, fluorenelidene group, spiro-difluorenelidene group, benzo[a]fluorenelidene group, dibenzo[a]fluorenelidene group, phenanthrenelidene group, anthracenelidene group, fluorenethracene group, benzo[a]phenanthrenelidene group, pyrene group, etc. Perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, thiophene group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophene group, pyridinyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiazolyl diazolyl group, oxadiazolyl group , pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolineyl group, isoquinolineyl group, benzoquinolineyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinoxalinyl group, phenanthrene-pyridinyl group, acridineyl group, phenanthrene-pyridinyl group, benzimidazoleyl group, isobenzothiazolyl group, benzimidazoleyl group, isobenzoxazoleyl group, isobenzoxazoleyl group, triazoleyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and zazacarbazolyl group; and

[0246] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, triphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthrene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group Pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinazolinyl group, phenanthridineyl group, acridineyl group, phenanthroxolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, azacarbazolyl group, -Si(Q) 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 At least one substituted phenylene group, naphthylene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthrene group, anthracene group, fluorenyl anthracene group, benzo[a]phenanthrene group, pyrene group, etc. Perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, thiophene group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophene group, pyridinyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiazolyl diazolyl group, oxadiazolyl group The following groups are listed: pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolineyl group, isoquinolineyl group, benzo[a]quinolineyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinoxalinyl group, phenanthrene-pyridinyl group, acridineyl group, phenanthrene-pyridinyl group, benzimidazoleyl group, isobenzothiazolyl group, benzimidazoleyl group, isobenzoxazoleyl group, isobenzoxazoleyl group, triazoleyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and zazacarbazolyl group.

[0247] Q 31 To Q 33 Same as described above.

[0248] In one exemplary embodiment, R in Formulas 301, 301-1, and 301-2 301 To R 304 Each can be selected independently from:

[0249] Phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthryl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthryl group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group Pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinazolinyl group, cyclophosphinyl group, phenanthridineyl group, acridineyl group, phenanthroxolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and azacarbazolyl group; and

[0250] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, triphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthrene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group Pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinazolinyl group, phenanthridineyl group, acridineyl group, phenanthroxolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, azacarbazolyl group, -Si(Q) 31 (Q) 32 (Q) 33 -N(Q) 31 (Q)32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 At least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthryl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthryl group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group Pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinazolinyl group, cyclophosphinyl group, phenanthridineyl group, acridineyl group, phenanthroxolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group and azacarbazolyl group, and

[0251] Q 31 To Q 33 Same as described above.

[0252] In one or more exemplary embodiments, the body may include an alkaline earth metal complex. For example, the body may be selected from Be complexes (e.g., compound H55), Mg complexes, and Zn complexes.

[0253] The main body may include at least one selected from 9,10-bis(2-naphthyl)anthracene (ADN), 2-methyl-9,10-bis(naphthyl-2-yl)anthracene (MADN), 9,10-bis-(2-naphthyl)-2-tert-butyl-anthracene (TBADN), 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP), 1,3-bis-9-carbazolylbenzene (mCP), 1,3,5-tris(carbazolyl-9-yl)benzene (TCP) and compounds H1 to H55, but exemplary embodiments of the present invention are not limited thereto:

[0254]

[0255]

[0256]

[0257] In one exemplary embodiment, the body may include at least one selected from silicon-containing compounds (e.g., BCPDS, etc.) and phosphine oxide-containing compounds (e.g., POPCPA, etc.).

[0258] However, the exemplary embodiments of the present invention are not limited thereto. In one exemplary embodiment, the body may include only one compound, or two or more different compounds (e.g., the body comprises BCPDS and POPCPA).

[0259] Dopants can emit thermally activated delayed fluorescence or fluorescence.

[0260] Specifically, the dopant can further satisfy Equation 3:

[0261] Equation 3

[0262] │S1(D)–T1(D)│≤0.5eV.

[0263] In equation 3,

[0264] T1(D) is the lowest excited triplet energy level of the dopant, and

[0265] S1(D) is the lowest excited singlet state energy level of the dopant.

[0266] When the dopant satisfies Equation 3, it can emit thermally activated delayed fluorescence or green fluorescence even at room temperature. Specifically, when the dopant satisfies Equation 3, it can emit green light.

[0267] More specifically, the dopant can satisfy |S1(D)–T1(D)|≤0.3eV, but the exemplary embodiments of the present invention are not limited thereto.

[0268] In one or more exemplary embodiments, the dopant may not contain metal atoms. That is, the dopant is different from a phosphorescent emitter that contains metal atoms.

[0269] For example, a dopant can have a DA-type structure that includes an electron-donating group (D) and an electron-accepting group (A).

[0270] In one exemplary embodiment, the dopant may have a DAD-type structure or an ADA-type structure.

[0271] In addition, fluorescent dopants may include arylamine compounds or styreneamine compounds.

[0272] Fluorescent dopants may include compounds represented by the following formula 501:

[0273] <Form 501>

[0274]

[0275] In Equation 501,

[0276] Ar 501 C5-C can be substituted or unsubstituted. 60 The carbocyclic group is either substituted or unsubstituted C1-C. 60 Heterocyclic groups,

[0277] L 501 To L 503 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0278] xd1 to xd3 can each be an integer from 0 to 3 independently.

[0279] R 501 and R 502 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, and

[0280] xd4 can be an integer from 1 to 6.

[0281] In one exemplary implementation, Ar in Formula 501 501 You can choose from:

[0282] Naphthalene group, heptadene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthrene group, anthracene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, Groups, tetraphenyl groups, furan groups, perylene groups, pentaphenyl groups, indene-anthracene groups, and indene-phenanthrene groups; and

[0283] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 At least one substituted naphthyl group selected from alkoxy group, phenyl group, biphenyl group, triphenyl group and naphthyl group, heptadene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthracene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Groups, tetraphenyl group, styrene group, perylene group, pentaphenyl group, indene-anthracene group and indene-phenanthrene group.

[0284] In one or more exemplary embodiments, L in Formula 501 501 To L 503 Each can be selected independently from:

[0285] Phenylidene group, naphthyl group, fluorenelidene group, spiro-difluorenelidene group, benzo[a]fluorenelidene group, dibenzo[a]fluorenelidene group, phenanthrenelidene group, anthracenelidene group, fluorenethracene group, benzo[a]phenanthrenelidene group, pyrene group, etc. Perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, thiophene group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophene group, and pyridylene group; and

[0286] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, triphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthrene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, At least one substituted phenylene group, naphthylene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, benzo[a]fluorene group, phenanthrene group, anthracene group, fluorene-anthrene group, benzo[a]phenanthrene group, pyrene group, benzo[a]fluorene group, benzo[a]fluorene group, phenanthrene group, phenanthrene group, phenanthrene group, phenanthrene group, pyrene group, benzo[a]fluorene group, benzo[a]fluorene group, benzo[a]fluorene group, phenanthrene group, phenanthrene group, pyrene group, benzo[a]fluorene group, benzo[a]fluorene group, benzo[a]fluorene group, phenanthrene group, benzo[a]phenanthrene group, pyrene group, benzo[a]fluorene group, benzo[a]fluorene group, benzo[a]fluorene group, benzo[a]pyrene ...pyrene group, benzo[a]fluorene group, benzo[a]pyrene group, benzo[a]fluorene group, benzo[a]pyrene group, benzo[a]fluorene group, benzo[a]pyrene group, benzo[a]pyrene group, benzo[a]pyrene group, benzo[a]pyrene group, benzo[a]pyrene group Perylyl group, perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, thiophene group, furanyl group, carbazoyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazoyl group, dibenzocarbazoyl group, dibenzothiophene group, and pyridylyl group.

[0287] In one or more exemplary embodiments, R in Formula 501 501 and R 502 Each can be selected independently from:

[0288] Phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthryl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthryl group, pyrene group, Peryl group, peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thienyl group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophenyl group, dibenzofuranyl group, dibenzothiophenyl group, benzocarbazole group, dibenzocarbazole group, dibenzothiophenyl group and pyridyl group; and

[0289] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, triphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthrene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group and -Si(Q) 31 (Q) 32 (Q) 33 At least one substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthryl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthryl group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group and pyridyl group, and

[0290] Q 31 To Q 33 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0291] In one or more exemplary embodiments, xd4 in Formula 501 can be 2, but the exemplary embodiments of the present invention are not limited thereto.

[0292] For example, fluorescent dopants can be selected from compounds FD1 to FD22:

[0293]

[0294]

[0295]

[0296] In one or more exemplary embodiments, the fluorescent dopant may be selected from the following compounds, but the exemplary embodiments of the present invention are not limited thereto:

[0297]

[0298]

[0299] The electron transport region 170 may have i) a single-layer structure comprising a single layer of a single material, ii) a single-layer structure comprising a single layer of multiple different materials, or iii) a multi-layer structure comprising multiple layers of multiple different materials.

[0300] The electron transport region 170 may include at least one selected from a buffer layer, a hole blocking layer 171, an electronic control layer, an electron transport layer 172, and an electron injection layer, but exemplary embodiments of the present invention are not limited thereto.

[0301] For example, the electron transport region 170 may have an electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, a buffer layer / electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, a hole blocking layer / electron control layer / electron transport layer / electron injection layer structure, or a hole blocking layer / buffer layer / electron transport layer / electron injection layer structure, wherein for each structure, the constituent layers are stacked sequentially from the emitter layer 150. However, the exemplary embodiments of the present invention are not limited thereto.

[0302] The hole-blocking material contained in the hole-blocking layer 171 can satisfy 2.5 eV ≤ T1(BL) ≤ 3.5 eV, but the exemplary embodiments of the present invention are not limited to this. When the hole-blocking material is within this range, excitons can be substantially trapped in the emission layer, and the excitons in the emission layer can fully participate in light emission.

[0303] The hole-blocking material can be represented by Equation 5, but the exemplary embodiments of the present invention are not limited thereto:

[0304] <Formula 5>

[0305]

[0306] In Equation 5,

[0307] X 21 It can be N or C(R) 21 ), X 22 It can be N or C(R) 22 ), X 23 It can be N or C(R) 23 ), X 24 It can be N or C(R) 24 ), X 25 It can be N or C(R) 25 ), and X 26 It can be N or C(R) 26 ), of which X 21 To X 26 At least one of them can be N,

[0308] R 21 To R 26 Each can be independently selected from hydrogen, deuterium, substituted or unsubstituted C6-C. 60 aryl group, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, and

[0309] Selected from R 21 To R 26 At least one of them can be independently selected from substituted or unsubstituted C6-C. 60 aryl group, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

[0310] In one exemplary embodiment, the hole-blocking material may be selected from compounds 21 to 27, but the exemplary embodiments of the present invention are not limited thereto:

[0311]

[0312]

[0313] Hole-blocking layer 171 may be composed of a single compound or may contain a mixture of two or more different compounds.

[0314] In one exemplary embodiment, the hole-blocking material may be the same as the host, but the exemplary embodiments of the present invention are not limited thereto. For example, the hole-blocking material may be the same as the electron transport host, but the exemplary embodiments of the present invention are not limited thereto.

[0315] In one exemplary embodiment, the thickness (D) of the hole blocking layer 171 is... HB ) and the thickness of the emission layer 150 (D E ) can satisfy D E ≥D HB Specifically, the thickness (D) of the hole blocking layer 171 HB ) and the thickness of the emission layer 150 (D E ) can satisfy D E >D HB However, exemplary embodiments of the present invention are not limited thereto. When the thicknesses of the hole blocking layer 171 and the emitting layer 150 are within these ranges, the desired efficiency improvement can be achieved without increasing the driving voltage of the organic light-emitting device.

[0316] In one or more exemplary embodiments, the thickness of the hole blocking layer 171 can be approximately to approximately The thickness of the hole blocking layer 171 is within this range, but the exemplary embodiments of the present invention are not limited thereto. When the thickness of the hole blocking layer 171 is within this range, the desired efficiency improvement effect can be obtained without increasing the driving voltage of the organic light-emitting device.

[0317] The electron transport region 170 (e.g., a buffer layer, hole blocking layer 171, electron control layer, or electron transport layer 172 in the electron transport region) may contain a metal-free compound with a nitrogen-containing ring that has at least one π electron depleted.

[0318] "A nitrogen-containing ring with depleted π electrons" refers to a C1-C ring with at least one *-N=*' moiety as the cyclic part. 60 Heterocyclic groups.

[0319] For example, a "π-electron depleted nitrogen-containing ring" can be i) a 5- to 7-membered heterocyclic group having at least one *-N=*' moiety, ii) a heteropolycyclic group wherein two or more 5- to 7-membered heterocyclic groups each having at least one *-N=*' moiety are fused together, or iii) at least one of the 5- to 7-membered heterocyclic groups each having at least one *-N=*' moiety is combined with at least one C5-C 60 A heterocyclic group with fused carbocyclic groups.

[0320] Examples of nitrogen-containing rings that are depleted of π electrons include, but are not limited to, imidazoles, pyrazoles, thiazoles, isothiazoles, oxazoles, isoxazoles, pyridines, pyrazines, pyrimidines, pyridazines, indazoles, purines, quinoline, isoquinoline, benzoquinoline, phthalazines, naphthidine, quinoxaline, quinazoline, cyclophosphine, phenanthridine, acridine, phenanthridine, phenazine, benzimidazole, isobenzothiazole, benzoxazole, isobenzoxazole, triazoles, tetraazoles, oxadiazoles, triazines, thiadiazoles, imidazopyridines, imidazopyrimidines, and azacarbazoles.

[0321] For example, electron transport region 170 may contain a compound represented by formula 601:

[0322] <Formula 601>

[0323] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21

[0324] In Equation 601,

[0325] Ar 601 C5-C can be substituted or unsubstituted. 60The carbocyclic group is either substituted or unsubstituted C1-C. 60 Heterocyclic groups,

[0326] xe11 can be 1, 2, or 3.

[0327] L 601 It can be selected from substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0328] xe1 can be an integer from 0 to 5.

[0329] R 601 It can be selected from substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups, -Si(Q 601 (Q) 602 (Q) 603 -C(=O)(Q) 601 -S(=O)2(Q) 601 ) and -P(=O)(Q 601 (Q) 602 ),as well as

[0330] Q 601 To Q 603 Each can be independently C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, or naphthyl groups, and

[0331] xe21 can be an integer from 1 to 5.

[0332] In one exemplary implementation, xe11 quantity of Ar 601 and the number of R in xe21 601 At least one of them may contain a nitrogen-containing ring that has depleted π electrons.

[0333] In one exemplary implementation, Ar in Formula 601 601 You can choose from:

[0334] Phenyl group, naphthyl group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthrene group, anthracene group, fluoranthene group, benzo[a]phenanthrene group, pyrene group, Groups, tetraphenyl group, styrene group, perylene group, pentaphenyl group, indene-anthracene group, dibenzofuran group, dibenzothiophene group, carbazole group, imidazole group, pyrazole group, thiazole group, isothiazole group, oxazole group, isoxazole group, pyridine group, pyrazine group, pyrimidine group, pyridazine group, indazole group, purine group, quinoline group, isoquinoline group, benzoquinoline group, phthalazine group, naphthidine group, quinoxaline group, quinazolinoline group, cyclophosphine group, phenanthridine group, acridine group, phenanthrene-rhein group, phenazine group, benzimidazole group, isobenzothiazole group, benzoxazole group, isobenzoxazole group, triazole group, tetraazole group, oxadiazole group, triazine group, thiadiazole group, imidazopyridine group, imidazopyrimidine group and azacarbazole group; and

[0335] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q) 31 (Q) 32 (Q) 33 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 At least one substituted phenyl group, naphthyl group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthracene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Groups, tetraphenyl, styrene, perylene, pentaphenyl, indene-anthracene, dibenzofuran, dibenzothiophene, carbazole, imidazole, pyrazole, thiazole, isothiazole, oxazole, isoxazole, pyridine, pyrazine, pyrimidine, pyridazine, indazole, purine, quinoline, isoquinoline, benzoquinoline, phthalazine, naphthidine, quinoxaline, quinazolin, cinnamic acid, phenanthridine, acridine, phenanthrene-rhein, phenazine, benzimidazole, isobenzothiazole, benzoxazole, isobenzoxazole, triazole, tetraazole, oxadiazole, triazine, thiadiazole, imidazopyridine, imidazopyrimidine, and azacarbazole, and

[0336] Q 31 To Q 33 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0337] When xe11 in equation 601 is two or greater than two, there are two or more Ar... 601 It can be connected via a single key.

[0338] In one or more exemplary embodiments, Ar in Formula 601 601 It can be an anthracene group.

[0339] In one or more exemplary embodiments, the compound represented by formula 601 may be represented by formula 601-1:

[0340] <Formula 601-1>

[0341]

[0342] In Equation 601-1,

[0343] X 614 It can be N or C(R) 614 ), X 615 It can be N or C(R) 615 ), and X 616 It can be N or C(R) 616 ), of which X 614 To X 616 At least one of them can be N,

[0344] L 611 To L 613 They can be independently related to L 601 The same definition

[0345] xe611 to xe613 can each be independently identical to the definition regarding xe1.

[0346] R 611 To R 613 They can be independently related to R. 601 The same definition, and

[0347] R 614 To R 616 Each group can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0348] In one exemplary embodiment, L in Formula 601 and Formula 601-1 601 and L 611 To L 613 Each can be selected independently from:

[0349] Phenylidene group, naphthyl group, fluorenelidene group, spiro-difluorenelidene group, benzo[a]fluorenelidene group, dibenzo[a]fluorenelidene group, phenanthrenelidene group, anthracenelidene group, fluorenethracene group, benzo[a]phenanthrenelidene group, pyrene group, etc. Perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, thiophene group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophene group, pyridinyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiazolyl diazolyl group, oxadiazolyl group , pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolineyl group, isoquinolineyl group, benzoquinolineyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinoxalinyl group, phenanthrene-pyridinyl group, acridineyl group, phenanthrene-pyridinyl group, benzimidazoleyl group, isobenzothiazolyl group, benzimidazoleyl group, isobenzoxazoleyl group, isobenzoxazoleyl group, triazoleyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and zazacarbazolyl group; and

[0350] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, triphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthrene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinoline At least one substituted phenylene group, naphthidyl group, quinoxalinyl group, quinazolinyl group, phenanthrynyl group, acridineyl group, phenanthrolineyl group, phenazinyl group, benzimidazole group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazole group, tetrazolyl group, imidazopyridyl group, imidazopyrimidyl group, and azacarbazolyl group, naphthylene group, fluorene group, spiro-difluorene group, benzo[a]fluorene group, dibenzo[a]fluorene group, phenanthrene group, anthracene group, fluorenyl anthracene group, benzo[a]phenanthrene group, pyrene group, etc., selected from the following groups: phenylene group, naphthylene group, naphthylene group, benzo[a]phenanthrene group, pyrene group, etc. Perylene group, pentaphenylene group, hexaphenylene group, pentaphenylene group, thiophene group, furanyl group, carbazolyl group, indoleyl group, isoindoleyl group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazolyl group, dibenzocarbazolyl group, dibenzothiophene group, pyridinyl group, imidazolyl group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiazolyl diazolyl group, oxadiazolyl group The following groups are listed: pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolineyl group, isoquinolineyl group, benzo[a]quinolineyl group, phthalazinyl group, naphthidyl group, quinoxalinyl group, quinoxalinyl group, phenanthrene-pyridinyl group, acridineyl group, phenanthrene-pyridinyl group, benzimidazoleyl group, isobenzothiazolyl group, benzimidazoleyl group, isobenzoxazoleyl group, isobenzoxazoleyl group, triazoleyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and zazacarbazolyl group.

[0351] However, the exemplary embodiments of the present invention are not limited thereto.

[0352] In one or more exemplary embodiments, xe1 and xe611 to xe613 in Formula 601 and Formula 601-1 can each be 0, 1 or 2 independently.

[0353] In one or more exemplary embodiments, R in Formula 601 and Formula 601-1 601 and R 611 To R 613 Each can be selected independently from:

[0354] Phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthryl group, anthraceneyl group, fluoranthraceneyl group, benzo[a]phenanthryl group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridinyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group Groups, including pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinazolinyl group, cyclophosphinyl group, phenanthridineyl group, acridineyl group, phenanthroxolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and azacarbazolyl group;

[0355] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, triphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[a]fluorenyl group, dibenzo[a]fluorenyl group, phenanthrene group, anthracene group, fluoranthracene group, benzo[a]phenanthrene group, pyrene group, Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group, pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinoline The following groups are substituted with at least one of the following groups: phthalazinyl group, naphthidyl group, quinoxalinyl group, quinazolinyl group, phenanthrynyl group, acridineyl group, phenanthrolineyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridyl group, imidazopyrimidyl group, and azacarbazolyl group; a substituted phenyl group, biphenyl group, terphenyl group, naphthyl group, fluorenyl group, spiro-difluorenyl group, benzo[fluorenyl]fluorenyl group, dibenzo[fluorenyl]fluorenyl group, phenanthrene group, anthraceneyl group, fluoranthraceneyl group, benzo[phenanthreneyl]pyrene group. Peryl group, pentaphenyl group, hexaphenyl group, pentaphenyl group, thiophene group, furanyl group, carbazole group, indole group, isoindole group, benzofuranyl group, benzothiophene group, dibenzofuranyl group, dibenzothiophene group, benzocarbazole group, dibenzocarbazole group, dibenzothiophene group, pyridyl group, imidazole group, pyrazolyl group, thiazolyl group, isothiazolyl group, oxazolyl group, isoxazolyl group, thiadiazolyl group, oxadiazolyl group Pyrazinyl group, pyrimidinyl group, pyridazinyl group, triazinyl group, quinolinyl group, isoquinolinyl group, benzoquinolinyl group, phthalazinyl group, naphridinyl group, quinoxalinyl group, quinazolinyl group, cyclophosphinyl group, phenanthridineyl group, acridineyl group, phenanthroxolinyl group, phenazinyl group, benzimidazolyl group, isobenzothiazolyl group, benzoxazolyl group, isobenzoxazolyl group, triazolyl group, tetrazolyl group, imidazopyridinyl group, imidazopyrimidinyl group, and azacarbazolyl group; and

[0356] -S(=O)2(Q 601 ) and -P(=O)(Q 601 (Q) 602 ),as well as

[0357] Q 601 and Q 602 Same as described above.

[0358] The electron transport region 170 may contain at least one compound selected from compounds ET1 to ET36, but exemplary embodiments of the present invention are not limited thereto:

[0359]

[0360]

[0361]

[0362]

[0363] In one or more exemplary embodiments, the electron transport region 170 may comprise at least one selected from 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), Alq3, BAlq, 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ), and NTAZ.

[0364]

[0365] In one exemplary embodiment, the electron transport region 170 may contain a phosphine oxide-containing compound (e.g., TSPO1, etc.), but the exemplary embodiments of the present invention are not limited thereto. In one exemplary embodiment, the phosphine oxide-containing compound may be used in the hole blocking layer 171 in the electron transport region 170, but the exemplary embodiments of the present invention are not limited thereto.

[0366] The thickness of the buffer layer, hole blocking layer 171, or electronic control layer can each be approximately [missing information]. to approximately Within a certain range, for example, in approximately to approximately Within these ranges, excellent hole blocking or electronic control characteristics can be obtained without a significant increase in driving voltage when the thickness of the buffer layer, hole blocking layer 171, or electronic control layer is within these ranges.

[0367] The thickness of electron transport layer 172 can be approximately to approximately Within a certain range, for example, in approximately to approximately Within the aforementioned range, when the thickness of the electron transport layer 172 is within the aforementioned range, the electron transport layer 172 can have satisfactory electron transport characteristics without a significant increase in driving voltage.

[0368] In addition to the materials described above, the electron transport region 170 (e.g., the electron transport layer 172 in the electron transport region 170) may further comprise a metallic material.

[0369] The metal-containing material may include at least one selected from alkali metal complexes and alkaline earth metal complexes. Alkali metal complexes may contain metal ions selected from Li, Na, K, Rb, and Cs ions, and alkaline earth metal complexes may contain metal ions selected from Be, Mg, Ca, Sr, and Ba ions. The ligand coordinated to the metal ion of the alkali metal or alkaline earth metal complex may be selected from hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthrene, and cyclopentadiene, but the exemplary embodiments of the present invention are not limited thereto.

[0370] For example, metal-containing materials may include Li complexes. Li complexes may include, for example, compounds ET-D1 (lithium hydroxyquinoline, LiQ) or ET-D2:

[0371]

[0372] The electron transport region 170 may include an electron injection layer that facilitates the injection of electrons from the second electrode 190. The electron injection layer may be in direct contact with the second electrode 190.

[0373] The electron injection layer can have i) a single-layer structure comprising a single layer containing a single material, ii) a single-layer structure comprising a single layer containing multiple different materials, or iii) a multi-layer structure comprising multiple layers containing multiple different materials.

[0374] The electron injection layer may contain alkali metals, alkaline earth metals, rare earth metals, alkali metal compounds, alkaline earth metal compounds, rare earth metal compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof.

[0375] The alkali metal can be selected from Li, Na, K, Rb, and Cs. In one exemplary embodiment, the alkali metal can be Li, Na, or Cs. In one or more exemplary embodiments, the alkali metal can be Li or Cs, but the exemplary embodiments of the present invention are not limited thereto.

[0376] Alkaline earth metals can be selected from Mg, Ca, Sr and Ba.

[0377] Rare earth metals can be selected from Sc, Y, Ce, Tb, Yb and Gd.

[0378] The alkali metal compounds, alkaline earth metal compounds, and rare earth metal compounds may be selected from oxides and halides (e.g., fluorides, chlorides, bromides, or iodides) of alkali metals, alkaline earth metals, and rare earth metals.

[0379] The alkali metal compounds may be selected from alkali metal oxides, such as Li2O, Cs2O, or K2O, and alkali metal halides, such as LiF, NaF, CsF, KF, LiI, NaI, CsI, or KI. In one exemplary embodiment, the alkali metal compounds may be selected from LiF, Li2O, NaF, LiI, NaI, CsI, and KI, but the exemplary embodiments of the inventive concept are not limited thereto.

[0380] The alkaline earth metal compounds may be selected from alkaline earth metal oxides, such as BaO, SrO, CaO, Ba x Sr 1-x O(0 < x < 1) or Ba x Ca 1-x O(0 < x < 1). In one exemplary embodiment, the alkaline earth metal compounds may be selected from BaO, SrO, and CaO, but the exemplary embodiments of the inventive concept are not limited thereto.

[0381] The rare earth metal compounds may be selected from YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, and TbF3. In one exemplary embodiment, the rare earth metal compounds may be selected from YbF3, ScF3, TbF3, YbI3, ScI3, and TbI3, but the exemplary embodiments of the inventive concept are not limited thereto.

[0382] The alkali metal complexes, alkaline earth metal complexes, and rare earth metal complexes may contain ions of alkali metals, alkaline earth metals, and rare earth metals as described above, and the ligands coordinated to the metal ions of the alkali metal complexes, alkaline earth metal complexes, or rare earth metal complexes may be selected from hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyl oxazole, hydroxyphenyl thiazole, hydroxyphenyl oxadiazole, hydroxyphenyl thiadiazole, hydroxyphenyl pyridine, hydroxyphenyl benzimidazole, hydroxyphenyl benzothiazole, bipyridine, phenanthroline, and cyclopentadiene, but the exemplary embodiments of the inventive concept are not limited thereto.

[0383] The electron injection layer may consist of alkali metals, alkaline earth metals, rare earth metals, alkali metal compounds, alkaline earth metal compounds, rare earth metal compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof, as described above. In one or more exemplary embodiments, the electron injection layer may further comprise an organic material. When the electron injection layer further comprises an organic material, the alkali metals, alkaline earth metals, rare earth metals, alkali metal compounds, alkaline earth metal compounds, rare earth metal compounds, alkali metal complexes, alkaline earth metal complexes, rare earth metal complexes, or any combination thereof may be uniformly or non-uniformly dispersed in the matrix comprising the organic material.

[0384] The thickness of the electron injection layer can be approximately to approximately Within a certain range, for example, in approximately to approximately Within the range described above, when the thickness of the electron injection layer is within this range, the electron injection layer can have satisfactory electron injection characteristics without a significant increase in driving voltage.

[0385] As described above, the organic light-emitting device 10 may include a first auxiliary layer 160, and the organic light-emitting device 20 may include a first auxiliary layer 160 and a second auxiliary layer 140.

[0386] The first auxiliary layer 160 may contain the first compound. When the host material contained in the emitter layer 150 and the first compound are identical, the first auxiliary layer 160 is composed solely of the first compound. For example, the first auxiliary layer 160 may be composed solely of the first compound.

[0387] The first compound can be represented by one of formulas 1 to 3:

[0388] <Formula 1>

[0389] [Ar1] a1 -[(L1) a11 -R1] a21

[0390] <Formula 2>

[0391]

[0392] <Formula 3>

[0393]

[0394] In equations 1 to 3,

[0395] Ar1 can be substituted or unsubstituted C5-C. 60 The carbocyclic group is either substituted or unsubstituted C1-C. 60Heterocyclic groups,

[0396] a1 can be 1, 2, or 3.

[0397] L1 and L 11 To L 14 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0398] L 15 It can be selected from *-O-*', *-S-*', *-N(Q) 11 )-*', substituted or unsubstituted C1-C 20 alkylene groups, substituted or unsubstituted C2-C 20 alkenyl groups, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted divalent nonaromatic fused polycyclic groups, and substituted or unsubstituted divalent nonaromatic fused heterocyclic groups.

[0399] a11 can be an integer from 0 to 5.

[0400] b11 to b14 can each be an integer from 0 to 3 independently.

[0401] b15 can be an integer from 1 to 10.

[0402] R1 can be selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amido group, hydrazine group, hydrazone group, substituted or unsubstituted C1-C 60 Alkyl groups, substituted or unsubstituted C2-C 60 alkenyl groups, substituted or unsubstituted C2-C 60alkynyl group, substituted or unsubstituted C1-C 60 alkoxy group, substituted or unsubstituted C3-C 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, substituted or unsubstituted monovalent non-aromatic fused heterocyclic groups, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1), and -P(=O)(Q1)(Q2),

[0403] R 11 To R 14 and Q 11 Each can be independently selected from substituted or unsubstituted C3-C. 10 Cycloalkyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkyl groups, substituted or unsubstituted C3-C 10 Cycloalkenyl groups, substituted or unsubstituted C1-C 10 Heterocyclic alkenyl groups, substituted or unsubstituted C6-C 60 aryl group, substituted or unsubstituted C6-C 60 aryloxy group, substituted or unsubstituted C6-C 60 aryl thioyl groups, substituted or unsubstituted C1-C 60 Heteroaryl groups, substituted or unsubstituted monovalent nonaromatic fused polycyclic groups, and substituted or unsubstituted monovalent nonaromatic fused heterocyclic groups.

[0404] a21 can be an integer from 1 to 5, and

[0405] Q1 to Q3 can each be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0406] For example, Ar1 can be selected from carbazole group, benzocarbazole group, dibenzocarbazole group, indole group, benzoindole group, dibenzoindole group, triazine group, furan group, acridine group, phenoxazine group, and phenothiazine group; and

[0407] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 20 Alkyl groups, C1-C 20 Alkoxy group, phenyl group, biphenyl group, terphenyl group, naphthyl group, -Si(Q) 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 At least one substituted carbazole group, benzo[a]carbazole group, dibenzo[a]carbazole group, indole group, benzo[a]indole group, dibenzo[a]indole group, triazine group, furan group, acridine group, phenoxazine group, and phenothiazine group, and

[0408] Q 31 To Q 33 Each can be independently selected from C1-C 10 Alkyl groups, C1-C 10 Alkoxy groups, phenyl groups, biphenyl groups, terphenyl groups, and naphthyl groups.

[0409] The second auxiliary layer 140 may contain the second compound. When the main component contained in the emitter layer 150 is the same as the second compound, the second auxiliary layer 140 may be composed solely of the second compound. For example, the second auxiliary layer 140 may be composed solely of the second compound.

[0410] The second compound can be the same as the one defined for the first compound.

[0411] The second electrode 190 can be disposed on an organic layer having such a structure. The second electrode 190 can be a cathode, which is an electron injection electrode, and in this respect, the material used to form the second electrode 190 can be selected from metals, alloys, conductive compounds and combinations thereof having relatively low work function.

[0412] The second electrode 190 may contain at least one selected from lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ITO, and IZO, but the exemplary embodiments of the present invention are not limited thereto. The second electrode 190 may be a transmission electrode, a semi-transmission electrode, or a reflection electrode.

[0413] The second electrode 190 may have a single-layer structure or a multi-layer structure including two or more layers.

[0414] Organic light-emitting devices 10 and 20 may each further include a capping layer in the direction in which light is extracted. The capping layer can increase the external light-emitting efficiency according to the principle of constructive interference.

[0415] The coating layer can be an organic coating layer containing organic materials, an inorganic coating layer containing inorganic materials, or a composite coating layer containing both organic and inorganic materials.

[0416] The capping layer may comprise at least one material selected from carbocyclic compounds, heterocyclic compounds, amine-based compounds, porphyrin derivatives, phthalocyanine derivatives, naphthalenephthalocyanine derivatives, alkali metal complexes, and alkaline earth metal complexes. The carbocyclic compounds, heterocyclic compounds, and amine-based compounds may optionally be substituted with substituents containing at least one element selected from O, N, S, Se, Si, F, Cl, Br, and I.

[0417] In one exemplary embodiment, the coating layer may contain an amine-based compound.

[0418] In one or more exemplary embodiments, the covering layer may comprise a compound represented by formula 201 or formula 202.

[0419] In one or more exemplary embodiments, the covering layer may comprise compounds selected from compounds HT28 to HT33 and compounds CP1 to CP5, but the exemplary embodiments conceived in this invention are not limited thereto:

[0420]

[0421] In the above text, we have already discussed... Figure 1 and Figure 2 An organic light-emitting device according to an exemplary embodiment has been described. However, the exemplary embodiments conceived in this invention are not limited thereto.

[0422] The layers constituting the hole transport region, the emission layer, and the electron transport region can be formed in specific areas using one or more suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing, and laser-induced thermal imaging.

[0423] When the layers constituting the hole transport region, the emitter layer, and the electron transport region are formed by vacuum deposition, by considering the materials to be included in the layers to be formed and the structure of the layers to be formed, deposition temperatures of approximately 100°C to approximately 500°C and approximately 10 -8 To about 10 -3 The vacuum degree and about to approximately Deposition was carried out at a deposition rate of [missing information].

[0424] When the layer constituting the hole transport region, the emitter layer, and the layer constituting the electron transport region are formed by spin coating, spin coating can be performed at a coating speed of about 2,000 rpm to about 5,000 rpm and a heat treatment temperature of about 80°C to 200°C, taking into account the material to be included in the layer to be formed and the structure of the layer to be formed.

[0425] As used in this article, the term "C1-C" 60 "alkyl group" refers to a straight-chain or branched monovalent group of an aliphatic saturated hydrocarbon having 1 to 60 carbon atoms, and examples include methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, and hexyl groups. In some embodiments, C1-C 60 Alkyl groups can be C1-C 30 Alkyl groups, C1-C 20 alkyl groups or C1-C 10 Alkyl groups. As used in this document, "C1-C..." 60 "alkylene group" refers to a group that has a C1-C2 bond structure. 60 Divalent groups with the same structure as alkyl groups.

[0426] As used in this article, the term "C2-C" 60 "Alkenyl group" refers to the group located at C2-C. 60 An alkyl group is a hydrocarbon group having at least one carbon-carbon double bond at its middle or end, and examples include vinyl groups, propenyl groups, and butenyl groups. In some embodiments, C2-C 60 The alkenyl group can be C2-C 30 alkenyl groups, C2-C 20 alkenyl groups or C2-C 10 Alkenyl group. As used in this article, "C2-C"60 "Ideinyl group" refers to a group that has a C2-C... 60 Divalent groups with the same structure as alkenyl groups.

[0427] As used in this article, the term "C2-C" 60 "Alkyne group" refers to the group located at C2-C. 60 The alkyl group has at least one carbon-carbon triple bond at its middle or end, and examples include ethynyl and propynyl groups. In some embodiments, C2-C 60 The alkynyl group can be C2-C 30 alkynyl group, C2-C 20 alkynyl group or C2-C 10 Alkynyl group. As used in this article, "C2-C" 60 "Imyynyl group" refers to a group that has a C2-C... 60 A divalent group with the same structure as the alkynyl group.

[0428] As used in this article, the term "C1-C" 60 "Alkoxy group" refers to the group consisting of -OA 101 (where A) 101 For C1-C 60 Alkyl groups are monovalent groups, and examples of them include methoxy groups, ethoxy groups and isopropoxy groups.

[0429] As used in this article, the term "C3-C" 10 "Cycloalkyl group" refers to a monocyclic saturated hydrocarbon group having 3 to 10 carbon atoms, and examples include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, and cycloheptyl groups. As used herein, the term "C3-C" is also relevant. 10 "Cycloalkylene group" refers to a group that has a C3-C6 bond structure. 10 A divalent group with the same structure as a cycloalkyl group.

[0430] As used in this article, the term "C1-C" 10 "Heterocyclic alkyl group" refers to a monovalent monocyclic group having at least one heteroatom selected from N, O, Si, P, and S as the cyclic atom (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) and 1 to 10 carbon atoms, and examples include 1,2,3,4-oxatriazole alkyl groups, tetrahydrofuranyl groups, and tetrahydrothiophenyl groups. The term "C1-C" as used herein is also used. 10 "Heterocyclic alkyl groups" refers to groups with C1-C2 groups. 10 Divalent groups with the same structure as heterocyclic alkyl groups.

[0431] As used in this article, the term "C3-C" 10"Cycloalkenyl group" refers to a monovalent monocyclic group having 3 to 10 carbon atoms and at least one carbon-carbon double bond in its ring and lacking aromaticity, and examples include cyclopentenyl, cyclohexenyl, and cycloheptenyl groups. As used herein, the term "C3-C" is also relevant. 10 "Iridyl group" refers to a group that has a C3-C6 bond structure. 10 A divalent group with the same structure as the cycloalkenyl group.

[0432] As used in this article, the term "C1-C" 10 A "heterocyclic alkenyl group" refers to a monovalent monocyclic group having at least one heteroatom (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) selected from N, O, Si, P and S as cyclic atoms, 1 to 10 carbon atoms, and at least one carbon double bond in its ring. C1-C 10 Non-limiting examples of heterocyclic alkenyl groups include 4,5-dihydro-1,2,3,4-oxatriazolyl, 2,3-dihydrofuranyl, and 2,3-dihydrothiophenyl groups. As used herein, the term "C1-C..." 10 "Heterocyclic alkenyl group" refers to a group that has a C1-C2 bond structure. 10 A divalent group with the same structure as a heterocyclic alkenyl group.

[0433] As used in this article, the term "C6-C" 60 "Aryl group" refers to a monovalent group having a carbocyclic aromatic system containing 6 to 60 carbon atoms, and the C6-C group used in this article... 60 A aryl group is a divalent group that has a carbocyclic aromatic system containing 6 to 60 carbon atoms. (C6-C) 60 Non-limiting examples of aryl groups include phenyl groups, naphthyl groups, anthracene groups, phenanthrene groups, pyrene groups, and... Base group. In some embodiments, C6-C 60 The aryl group can be C6-C. 30 aryl group, C6-C 18 aryl group or C6-C 12 Aryl group. When C6-C 60 aryl groups and C6-C 60 When each of the aryl groups comprises two or more rings, the rings may be fused together.

[0434] As used in this article, the term "C1-C" 60 "Heteroaryl group" refers to a monovalent group having a carbocyclic aromatic system containing at least one heteroatom selected from N, O, Si, P, and S as a cyclic atom other than 1 to 60 carbon atoms (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms). As used herein, the term "C1-C..."60 A "hybrid aryl group" refers to a divalent group having a carbocyclic aromatic system containing at least one heteroatom selected from N, O, Si, P, and S (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) as cyclic atoms other than 1 to 60 carbon atoms. C1-C 60 Non-limiting examples of heteroaryl groups include pyridinyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, and isoquinolinyl groups. In some embodiments, C1-C 60 The heteroaryl group can be C1-C 30 heteroaryl groups, C1-C 18 heteroaryl groups or C1-C 12 Heteroaryl groups. In some embodiments, C1-C 60 The heteroaryl group can be C1-C 30 heteroaryl groups, C1-C 18 heteroaryl groups or C1-C 12 Hypoaryl group. When C1-C 60 heteroaryl groups and C1-C 60 When each of the heteroaryl groups comprises two or more rings, the rings can be fused together.

[0435] As used in this article, the term "C6-C" 60 "Aryloxy group" refers to -OA 102 (where A) 102 For C6-C 60 Aryl groups), and the C6-C used in this article 60 Aryl thio group represents -SA 103 (where A) 103 For C6-C 60 (aryl group).

[0436] As used herein, the term "monovalent nonaromatic fused polycyclic group" refers to a monovalent group (e.g., having 8 to 60 carbon atoms, such as 8 to 30, 8 to 20, or 8 to 12 carbon atoms) that has two or more rings fused together, has only carbon atoms as cyclic atoms, and is not aromatic throughout its molecular structure. A detailed example of a monovalent nonaromatic fused polycyclic group is the fluorenyl group. 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.

[0437] As used herein, the term "monovalent nonaromatic fused heterocyclic group" refers to a monovalent group (e.g., having 1 to 60 carbon atoms, such as 1 to 30, 1 to 20, or 1 to 12 carbon atoms) having two or more rings fused together, having at least one heteroatom selected from N, O, Si, P, and S (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4, or 5 heteroatoms) as a cyclic atom in addition to carbon atoms, and not being aromatic throughout its molecular structure. An example of a monovalent nonaromatic fused heterocyclic group is the carbazoyl group. 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.

[0438] As used in this article, the term "C5-C" 60 A "carbocyclic group" refers to a monocyclic or polycyclic group having 5 to 60 carbon atoms, where the cyclic atom is only a carbon atom. For example, the term "C5-C" as used herein... 60 "Carbocyclic group" refers to either an aromatic carbocyclic group or a non-aromatic carbocyclic group. C5-C 60 The carbocyclic group can be a ring, such as benzene; a monovalent group, such as a phenyl group; or a divalent group, such as a phenylene group. In one or more exemplary embodiments, according to the connection to C5-C 60 The number of substituents in the carbocyclic group, C5-C 60 The carbon ring group can be a trivalent group or a tetravalent group.

[0439] As used in this article, the term "C1-C" 60 "Heterocyclic group" refers to a group that has a cyclic structure similar to C5-C6. 60 A group with the same structure as a carbocyclic group, but in addition to carbon (the number of carbon atoms can range from 1 to 60), it uses at least one heteroatom selected from N, O, Si, P and S (e.g., 1 to 5 or 1 to 3 heteroatoms, such as 1, 2, 3, 4 or 5 heteroatoms) as the cyclic atom.

[0440] In this specification, C5-C is replaced. 60 Carbocyclic groups, substituted C1-C 60 Heterocyclic groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocyclic alkyl groups, substituted C3-C 10 Cycloalkylene groups, substituted C1-C 10 Heterocyclic alkenyl groups, substituted C6-C 60 arylene groups, substituted C1-C 60 Heteroaryl groups, substituted divalent nonaromatic fused polycyclic groups, substituted divalent nonaromatic fused heterocyclic groups, substituted C1-C60 Alkyl groups, substituted C2-C 60 alkenyl groups, substituted C2-C 60 alkynyl group, substituted C1-C 60 alkoxy groups, substituted C3-C 10 Cycloalkyl groups, substituted C1-C 10 Heterocyclic alkyl groups, substituted C3-C 10 Cycloalkenyl groups, substituted C1-C 10 Heterocyclic alkenyl groups, substituted C6-C 60 aryl group, substituted C6-C 60 aryloxy groups, substituted C6-C 60 aryl thiols, substituted C1-C 60 The heteroaryl group, the substituted monovalent non-aromatic fused polycyclic group, and at least one substituent of the substituted monovalent non-aromatic fused heterocyclic group can each be independently selected from:

[0441] Deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl groups and C1-C 60 Alkoxy group;

[0442] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C 10 cycloalkenyl groups, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 aryl group, C6-C 60 aryloxy group, C6-C 60 aryl thiols, C1-C 60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -Si(Q) 11 (Q) 12 (Q) 13 -N(Q) 11 (Q) 12 -B(Q) 11 (Q) 12 -C(=O)(Q) 11 -S(=O)2(Q) 11 ) and -P(=O)(Q 11 (Q)12 At least one substituted C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl groups and C1-C 60 Alkoxy group;

[0443] C3-C 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C 10 cycloalkenyl groups, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 aryl group, C6-C 60 aryloxy group, C6-C 60 aryl thiols, C1-C 60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heterocyclic groups;

[0444] Each group is selected from deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 60 Alkyl groups, C2-C 60 alkenyl groups, C2-C 60 alkynyl group, C1-C 60 alkoxy group, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C 10 cycloalkenyl groups, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 aryl group, C6-C 60 aryloxy group, C6-C 60 aryl thiols, C1-C 60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, monovalent non-aromatic fused heterocyclic groups, -Si(Q) 21 (Q) 22 (Q) 23 -N(Q) 21 (Q) 22 -B(Q) 21 (Q) 22 -C(=O)(Q) 21 -S(=O)2(Q) 21 ) and -P(=O)(Q 21 (Q) 22 At least one substituted C3-C 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C10 cycloalkenyl groups, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 aryl group, C6-C 60 aryloxy group, C6-C 60 aryl thiols, C1-C 60 Heteroaryl groups, monovalent non-aromatic fused polycyclic groups, and monovalent non-aromatic fused heterocyclic groups; and

[0445] -Si(Q 31 (Q) 32 (Q) 33 -N(Q) 31 (Q) 32 -B(Q) 31 (Q) 32 -C(=O)(Q) 31 -S(=O)2(Q) 31 ) and -P(=O)(Q 31 (Q) 32 ),as well as

[0446] Q 11 To Q 13 Q 21 To Q 23 and Q 31 To Q 33 Each group can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl group, cyano group, nitro group, amidine group, hydrazine group, hydrazone group, C1-C 60 Alkyl group, C2-C 60 alkenyl group, C2-C 60 alkynyl group, C1-C 60 Alkoxy group, C3-C 10 Cycloalkyl groups, C1-C 10 Heterocyclic alkyl groups, C3-C 10 Cycloalkenyl group, C1-C 10 Heterocyclic alkenyl groups, C6-C 60 Aryl group, C1-C 60 A heteroaryl group, a monovalent non-aromatic fused polycyclic group, a monovalent non-aromatic fused heterocyclic group, a C1-C group substituted with at least one of deuterium, -F and cyano groups. 60 The alkyl group is a C6-C group substituted with at least one of a deuterium, -F, or cyano group. 60 Aryl groups, biphenyl groups, and terphenyl groups.

[0447] As used herein, the term "Ph" refers to a phenyl group, "Me" refers to a methyl group, "Et" refers to an ethyl group, and "ter-Bu" or "Bu" refers to a ter-Bu group. t "" refers to the tert-butyl group, and the term "OMe" as used herein refers to the methyl methacrylate group.

[0448] As used in this article, the term "biphenyl group" refers to a "phenyl group substituted with a phenyl group." In other words, a "biphenyl group" is a group with a C6-C6 bond. 60 The aryl group is a substituted phenyl group.

[0449] As used in this article, the term "terphenyl group" refers to a "phenyl group substituted with a biphenyl group." In other words, a "terphenyl group" is a phenyl group with a C6-C substituted group. 60 C6-C substituted with aryl group 60 The aryl group is a substituted phenyl group.

[0450] As used in this article, * and *', unless otherwise defined, refer to the connection site with the adjacent atom in the corresponding formula.

[0451] The organic light-emitting device according to the exemplary embodiments will be described in detail below with reference to the embodiments.

[0452] Evaluation Example 1: Measurement of the lowest excited triplet level (T1)

[0453] The lowest excited triplet energy levels (T1) of the host, first compound, and second compound were measured using a DFT method with a structurally optimized Gaussian procedure at the level of B3LYP / 6-31G(d,p), and the results are shown in Table 1 below.

[0454] Table 1

[0455] Material T1(eV) Main body (CBP) 2.65 First compound 2.50 Second compound 2.57

[0456] Example 1

[0457] As both the substrate and anode, a material manufactured by Corning Inc. with a 15Ω / cm² surface area will be used. 2 The ITO glass substrate was cut into 50mm × 50mm × 0.5mm dimensions, ultrasonically treated with isopropanol and pure water for 5 minutes each, and then cleaned by exposure to ultraviolet light and ozone for 30 minutes. The resulting glass substrate was then loaded onto a vacuum deposition apparatus.

[0458] 2-TNATA was vacuum deposited onto an ITO glass substrate to form a structure with... A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0459] CBP is vacuum-deposited onto the hole transport layer to form a structure with An electron blocking layer of a certain thickness.

[0460] CBP (body) and 4CzIPN (dopant) were co-deposited on the electron blocking layer at a weight ratio of 80:20 to form a layer with... The thickness of the emission layer.

[0461] The first compound is vacuum-deposited onto the emitter layer to form a structure with... The first auxiliary layer has a thickness of [missing information].

[0462] TPBi is vacuum deposited on the first auxiliary layer to form a structure with A hole-blocking layer of a certain thickness.

[0463] Alq3 was vacuum deposited onto a hole-blocking layer to form a structure with An electron transport layer of a certain thickness was formed. LiQ was vacuum-deposited onto the electron transport layer to create a layer with... An electron-injected layer of a certain thickness was formed, and Al was vacuum-deposited to form a layer with [missing information]. A cathode of a certain thickness is used to complete the fabrication of an organic light-emitting device.

[0464]

[0465] Example 2

[0466] As the substrate and anode, a material manufactured by Corning will have a 15Ω / cm² surface temperature coefficient. 2 The ITO glass substrate was cut into 50mm × 50mm × 0.5mm dimensions, ultrasonically treated with isopropanol and pure water for 5 minutes each, and then cleaned by exposure to ultraviolet light and ozone for 30 minutes. The resulting glass substrate was then loaded onto a vacuum deposition apparatus.

[0467] 2-TNATA was vacuum deposited onto an ITO glass substrate to form a structure with... A hole injection layer of a certain thickness is formed, and NPB is vacuum deposited on the hole injection layer to form a layer with [missing information]. A hole transport layer of a certain thickness.

[0468] CBP is vacuum-deposited onto the hole transport layer to form a structure with An electron blocking layer of a certain thickness.

[0469] The second compound was vacuum-deposited onto the electron blocking layer to form a structure with... A second auxiliary layer of varying thickness.

[0470] CBP (body) and 4CzIPN (dopant) were co-deposited on the second auxiliary layer at a weight ratio of 80:20 to form a layer with... The thickness of the emission layer.

[0471] The first compound is vacuum-deposited onto the emitter layer to form a structure with... The first auxiliary layer has a thickness of [missing information].

[0472] TPBi is vacuum deposited on the first auxiliary layer to form a structure with A hole-blocking layer of a certain thickness.

[0473] Alq3 was vacuum deposited onto a hole-blocking layer to form a structure with An electron transport layer of a certain thickness was formed. LiQ was vacuum-deposited onto the electron transport layer to create a layer with... An electron-injected layer of a certain thickness was formed, and Al was vacuum-deposited to form a layer with [missing information]. A cathode of a certain thickness is used to complete the fabrication of an organic light-emitting device.

[0474] Comparative Example 1

[0475] In addition to vacuum depositing CBP and Alq3 at a weight ratio of 50:50 on the emitter layer to form a structure with... Apart from the first auxiliary layer of a certain thickness, the organic light-emitting device is manufactured in the same manner as in Example 1.

[0476] Comparative Example 2

[0477] The organic light-emitting device is manufactured in the same manner as in Example 1, except that the hole blocking layer is not arranged on the first auxiliary layer.

[0478] Comparative Example 3

[0479] The organic light-emitting device is manufactured in the same manner as in Example 1, except that the first auxiliary layer is not arranged on the emitting layer.

[0480] Evaluation Example 2

[0481] The driving voltage, current efficiency, and lifespan of the organic light-emitting devices manufactured according to Examples 1 and 2, and Comparative Examples 1 to 3, were measured using a Keithley SMU 236 and a luminance meter PR650, and the results are shown in Table 2 and... Figure 3 middle.

[0482] Table 2

[0483]

[0484] From Table 2 and Figure 3 It was confirmed that, compared with the organic light-emitting devices of Comparative Examples 1 to 3, the organic light-emitting devices of Examples 1 and 2 have higher efficiency and longer service life.

[0485] An organic light-emitting device comprising a host and a first compound satisfying the minimum excitation triplet energy level relationship, and an auxiliary layer containing the first compound disposed between an emission layer and a hole-blocking layer, can have a long lifespan and high efficiency.

[0486] While certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Therefore, the inventive concept is not limited to such embodiments, but rather to the broader scope of the claims and the various obvious modifications and equivalent arrangements that will be apparent to those skilled in the art.

Claims

1. An organic light emitting device comprising: a first electrode; a second electrode facing the first electrode; an organic layer including an emission layer disposed between the first electrode and the second electrode, and an electron transport zone between the second electrode and the emission layer; and a first auxiliary layer disposed between the emission layer and the electron transport zone, wherein the electron transport zone includes a hole blocking layer between the second electrode and the first auxiliary layer, wherein the electron transport zone includes an electron transport layer between the second electrode and the hole blocking layer, wherein the first auxiliary layer is present at an interface between the emission layer and the hole blocking layer, wherein the emission layer is in direct contact with the first auxiliary layer, the first auxiliary layer blocks excitons generated in the emission layer from moving to the electron transport zone without participating in light emission, wherein the emission layer contains a host, and the first auxiliary layer is composed of only a first compound, the organic light emitting device satisfies Equation 1, <Equation 1> T1(C1) ≤ T1(H), wherein, in Equation 1, T1(C1) is a lowest excited triplet energy level of the first compound, and T1(H) is a lowest excited triplet energy level of the host. 2.The organic light emitting device of claim 1, wherein T1(H) is 3.0 eV or less. 3.The organic light emitting device of claim 1, wherein the organic light emitting device further includes a hole transport zone between the first electrode and the emission layer, and the hole transport zone contains a hole transport material. 4.The organic light emitting device of claim 3, wherein the hole transport zone includes an electron blocking layer. 5.The organic light emitting device of claim 4, wherein the organic light emitting device further includes a second auxiliary layer between the electron blocking layer and the emission layer, and the second auxiliary layer contains a second compound and satisfies Equation 2, <Equation 2> T1(C2) ≤ T1(H), wherein, in Equation 2, T1(C2) is a lowest excited triplet energy level of the second compound, and T1(H) is a lowest excited triplet energy level of the host; wherein, when the host and the second compound are the same as each other, the second auxiliary layer is composed of only the second compound. 6.The organic light emitting device of claim 5, wherein the emission layer is in direct contact with the second auxiliary layer. 7.The organic light emitting device of claim 1, wherein the organic light emitting device further includes a hole transport zone between the first electrode and the emission layer, the hole transport zone includes an electron blocking layer, the host is a mixed host including a hole transport host and an electron transport host, the hole transport host is distributed in a side of the emission layer closer to the electron blocking layer, and the electron transport host is distributed in a side of the emission layer closer to the hole blocking layer. 8.The organic light emitting device of claim 1, wherein the first compound is represented by one selected from Formula 2 and Formula 3: <Formula 2> <Formula 3> ， wherein, in Formula 2 and Formula 3, L 11 to L 14 each independently selected from substituted or unsubstituted C3-C 10 cycloalkylene groups, substituted or unsubstituted C1-C 10 heterocycloalkylene groups, substituted or unsubstituted C3-C 10 cycloalkenylene groups, substituted or unsubstituted C1-C 10 heterocycloalkenylene groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 heteroarylene groups, substituted or unsubstituted bivalent non-aromatic fused polycyclic groups and substituted or unsubstituted bivalent non-aromatic fused heteropolycyclic groups, L 15 selected from -O- '、 -S- '、 -N(Q 11 )- ' a substituted or unsubstituted C1-C 20 alkylene group, a substituted or unsubstituted C2-C 20 alkenylene group, a substituted or unsubstituted C3-C 10 cycloalkylene group, a substituted or unsubstituted C1-C 10 heterocycloalkylene group, a substituted or unsubstituted C3-C 10 cycloalkenylene group, a substituted or unsubstituted C1-C 10 heterocycloalkenylene group, a substituted or unsubstituted C6-C 60 arylene group, a substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted bivalent non-aromatic fused polycyclic group and a substituted or unsubstituted bivalent non-aromatic fused heteropolycyclic group, b11 to b14 are each independently an integer of 0 to 3, b15 is an integer of 1 to 10, R 11 to R 14 and Q 11 are each independently selected from the group consisting of substituted or unsubstituted C3-C 10 cycloalkyl groups, substituted or unsubstituted C1-C 10 heterocycloalkyl groups, substituted or unsubstituted C3-C 10 cycloalkenyl groups, substituted or unsubstituted C1-C 10 heterocycloalkenyl groups, substituted or unsubstituted C6-C 60 aryl groups, substituted or unsubstituted C6-C 60 aryloxy groups, substituted or unsubstituted C6-C 60 arylthio groups, substituted or unsubstituted C1-C 60 heteroaryl groups, substituted or unsubstituted monovalent non-aromatic fused polycyclic groups, and substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic groups.

9. A display device comprising: a thin film transistor including a source electrode, a drain electrode, and an active layer; and An organic light emitting device comprising: a first electrode; a second electrode facing the first electrode; an organic layer including an emission layer disposed between the first electrode and the second electrode, and an electron transport zone between the second electrode and the emission layer; and a first auxiliary layer disposed between the emission layer and the electron transport zone, wherein the electron transport zone includes a hole blocking layer between the second electrode and the first auxiliary layer, wherein the electron transport zone includes an electron transport layer between the second electrode and the hole blocking layer, wherein the first auxiliary layer is present at an interface between the emission layer and the hole blocking layer, wherein the emission layer is in direct contact with the first auxiliary layer, the first auxiliary layer blocks excitons generated in the emission layer from moving to the electron transport zone without participating in light emission, wherein the emission layer contains a host, and the first auxiliary layer is composed of only a first compound, and the organic light emitting device satisfies Equation 1, <Equation 1> T1(C1) ≤ T1(H), wherein, in Equation 1, T1(C1) is a lowest excited triplet energy level of the first compound, and T1(H) is a lowest excited triplet energy level of the host; wherein the first electrode of the organic light emitting device is electrically connected to one of the source electrode and the drain electrode of the thin film transistor.

10. The display device of claim 9, wherein the first compound is represented by one selected from Formula 2 and Formula 3: <Formula 2> <Formula 3> ， wherein, in Formula 2 and Formula 3, L 11 to L 14 each independently selected from substituted or unsubstituted C3-C 10 cycloalkylene groups, substituted or unsubstituted C1-C 10 heterocycloalkylene groups, substituted or unsubstituted C3-C 10 cycloalkenylene groups, substituted or unsubstituted C1-C 10 heterocycloalkenylene groups, substituted or unsubstituted C6-C 60 arylene groups, substituted or unsubstituted C1-C 60 heteroarylene groups, substituted or unsubstituted bivalent non-aromatic fused polycyclic groups and substituted or unsubstituted bivalent non-aromatic fused heteropolycyclic groups, L 15 selected from -O- '、 -S- '、 -N(Q 11 )- ' a substituted or unsubstituted C1-C 20 alkylene group, a substituted or unsubstituted C2-C 20 alkenylene group, a substituted or unsubstituted C3-C 10 cycloalkylene group, a substituted or unsubstituted C1-C 10 heterocycloalkylene group, a substituted or unsubstituted C3-C 10 cycloalkenylene group, a substituted or unsubstituted C1-C 10 heterocycloalkenylene group, a substituted or unsubstituted C6-C 60 arylene group, a substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted bivalent non-aromatic fused polycyclic group and a substituted or unsubstituted bivalent non-aromatic fused heteropolycyclic group, b11 to b14 are each independently an integer of 0 to 3, b15 is an integer of 1 to 10, R 11 to R 14 and Q 11 each independently is selected from the group consisting of a substituted or unsubstituted C3-C 10 cycloalkyl group, a substituted or unsubstituted C1-C 10 heterocycloalkyl group, a substituted or unsubstituted C3-C 10 cycloalkenyl group, a substituted or unsubstituted C1-C 10 heterocycloalkenyl group, a substituted or unsubstituted C6-C 60 aryl group, a substituted or unsubstituted C6-C 60 aryloxy group, a substituted or unsubstituted C6-C 60 aralkyl group, a substituted or unsubstituted C1-C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic fused polycyclic group, and a substituted or unsubstituted monovalent non-aromatic fused heteropolycyclic group.

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