Organic light-emitting device and apparatus including the same

Abstract

Disclosed are an organic light-emitting device and a device including the same. The organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer further includes an emission region, a first region disposed between the first electrode and the emission region, and a second region disposed between the emission region and the second electrode; the second region includes a first layer and a second layer, both comprising organic compounds; the emission region includes a first compound, a second compound, a third compound, and a fourth compound; the first compound is a hole-transporting host compound; the second compound is an electron-transporting host compound or a bipolar host compound; and the third compound is a thermally activated delayed fluorescent compound or an organometallic complex satisfying Formula 1 described herein.

Description

Technical Field

[0001] Exemplary embodiments of the invention generally relate to an organic light emitting device and an apparatus including the same. Background Art

[0002] Organic light emitting devices are self-emitting devices that produce full-color images and also have wide viewing angles, high contrast, short response times, and excellent characteristics in terms of brightness, driving voltage, and response speed.

[0003] An example of an organic light-emitting device may include a first electrode located on a substrate, and a hole transport region, an emissive layer, an electron transport region, and a second electrode located sequentially on the first electrode. Holes provided from the first electrode can move toward the emissive layer through the hole transport region, and electrons provided from the second electrode can move toward the emissive layer through the electron transport region. Carriers such as holes and electrons recombine in the emissive layer to produce excitons. These excitons transfer from an excited state to a ground state, thereby generating light. Many existing organic light-emitting devices suffer from a shortened lifetime during operation.

[0004] The above information disclosed in this Background section is only for understanding the background of the inventive concept and therefore it may contain information that does not constitute the prior art. Summary of the Invention

[0005] Applicants have found that in organic light-emitting devices (OLEDs), when electrons cannot be efficiently injected from the electron transport region to the emission layer, charges accumulate at the interface between the emission layer and the electron transport region, thereby degrading the interface and reducing the lifetime of the organic light-emitting device.

[0006] Organic light-emitting devices and devices incorporating the same, constructed in accordance with the principles and exemplary embodiments of the present invention, have improved lifetimes due to certain defined material conditions and compositions. For example, in some exemplary embodiments, an interlayer is provided between the emissive layer and the electron transport region, or between the emissive layer and the hole transport region, or is included in the emissive layer to control the concentration and distribution of excitons in the emissive region. Electron injection can be regulated by controlling the properties and composition of the interlayer, thereby significantly and unexpectedly improving the lifetime of the organic light-emitting device by controlling the exciton concentration and distribution in the emissive layer.

[0007] Additional aspects of the inventive concepts will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the inventive concepts.

[0008] According to one aspect of the invention, an organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer disposed between the first electrode and the second electrode, wherein the organic layer further includes an emission region and a first region disposed between the first electrode and the emission region and a second region disposed between the emission region and the second electrode, the second region includes a first layer and a second layer each including an organic compound, the emission region includes a first compound, a second compound, a third compound, and a fourth compound, the first compound is a hole transport host compound, the second compound is an electron transport host compound or a bipolar host compound, the third compound is a thermally activated delayed fluorescence compound or an organic metal complex satisfying the following formula 1, the fourth compound is a fluorescent dopant, and at least one intermediate layer is disposed between the first region and the second region and includes at least one of the first compound, the second compound, and the fourth compound:

[0009] <Formula 1>

[0010] ΔE ST (C3)≤about 0.3eV,

[0011] Where, in Formula 1, ΔE ST (C3) is the lowest excited singlet energy level (E S1 (C3)) and the lowest excited triplet energy level (E T1 (C3)).

[0012] The first electrode may be an anode, the second electrode may be a cathode, the first region may be a hole transport region including a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer or any combination thereof, and the second region may be an electron transport region including a hole blocking layer, a buffer layer, an electron transport layer, an electron injection layer or any combination thereof.

[0013] The intermediate layer may be disposed between the first region and the emission region, and may have the first compound, the fourth compound, or a combination thereof.

[0014] The intermediate layer may be disposed between the second region and the emission region, and may have the second compound, the fourth compound, or a combination thereof.

[0015] The intermediate layer may be in direct contact with the emitting layer.

[0016] The emission region may include a first emission layer and a second emission layer, and the intermediate layer may be disposed between the first emission layer and the second emission layer and may include the first compound, the second compound, the fourth compound, or any combination thereof.

[0017] The first compound, the second compound, and the third compound may be different from each other.

[0018] An interval between a maximum peak wavelength of an absorption spectrum of the fourth compound and a maximum peak wavelength of an emission spectrum of the fourth compound may be about 35 nm or less.

[0019] The concentration of the fourth compound in the emission layer may be about 1 / 3 or less of the concentration of the third compound.

[0020] The first layer and the second layer may include a fifth compound and a sixth compound, respectively. The fifth compound may be different from the first compound, the second compound, and the fourth compound. The sixth compound may be different from the first compound, the second compound, and the fourth compound.

[0021] The first compound may be a compound represented by Formula 1:

[0022] <Formula 1>

[0023]

[0024] where variables are as defined herein.

[0025] VariableA 11 May be as defined herein.

[0026] The electron transport host compound may include an electron withdrawing group (EWG), and the bipolar host compound may include an EWG and an electron donating group (EDG).

[0027] The second compound may be a compound represented by one of Formula 2-1 and Formula 2-2:

[0028] <Formula 2-1>

[0029]

[0030] <Formula 2A>

[0031]

[0032] <Formula 2-2>

[0033]

[0034] In Formula 2-1, Formula 2A, and Formula 2-2, the variables are as defined herein.

[0035] The third compound may be a compound represented by one of Formula 3 and Formula 4-1 to Formula 4-3:

[0036] M 31 (L 31 ) n31 (L 32 ) n32

[0037]

[0038] <Formula 4-1>

[0039] (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41

[0040] <Formula 4-2>

[0041] (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41 -(L 42 ) a42 -(D 42 ) n42

[0042] <Formula 4-3>

[0043] (A 41 ) m41 -(L 41 ) a41 -(D 41 ) n41 -(L 42 ) a42 -(A 42 ) m42 ,

[0044] In Formula 3, Formula 3A to Formula 3D, and Formula 4-1 to Formula 4-3, the variables are as defined herein.

[0045] The third compound may be a compound represented by one of Formula 3-1 and Formula 3-2:

[0046]

[0047] In Formula 3-1 and Formula 3-2, the variables are as defined herein.

[0048] The variable D in Equations 4-1 to 4-3 41 and D 42 may all be independently as defined herein.

[0049] The fourth compound may be a compound represented by one of Formula 5(1), Formula 5(2), Formula 5(3), and Formula 501:

[0050] <Formula 5(1)>

[0051]

[0052] <Formula 5(2)>

[0053]

[0054] <Formula 5(3)>

[0055]

[0056] <Formula 501>

[0057]

[0058] Wherein, in Equations 5(1) to 5(3) and 501, the variables are as defined herein.

[0059] As disclosed herein, the first compound can be a compound in Group I; the second compound can be a compound in Group II; the third compound can be a compound in Group III-1 and Group III-2; and the fourth compound can be a compound in Group IV.

[0060] A device may include: a thin film transistor having a source electrode, a drain electrode, and an active layer; and an organic light emitting device as described above; wherein the first electrode of the organic light emitting device may be electrically connected to one of the source electrode and the drain electrode of the thin film transistor.

[0061] It is to 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 invention as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0062] The accompanying drawings illustrate exemplary embodiments of the invention and together with the description serve to explain the inventive concept. The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification.

[0063] Figure 1A is a schematic cross-sectional view of an exemplary embodiment of an organic light emitting device constructed according to the principles of the invention.

[0064] Figure 1B yes Figure 1A Schematic cross-sectional view of the organic layer between the electrodes is shown.

[0065] Figure 1C yes Figure 1B Schematic cross-sectional view of the emission region of the organic layer.

[0066] Figure 1D yes Figure 1B Schematic cross-sectional view of the hole transport region of the organic layer.

[0067] Figure 1E yes Figure 1B Schematic cross-sectional view of the electron transport region of the organic layer.

[0068] Figure 2 is a schematic cross-sectional view of another exemplary embodiment of an organic light emitting device constructed according to the principles of the invention.

[0069] Figure 3 is a schematic cross-sectional view of yet another exemplary embodiment of an organic light emitting device constructed according to the principles of the invention.

[0070] Figure 4 is a schematic cross-sectional view of yet another exemplary embodiment of an organic light emitting device constructed according to the principles of the invention.

[0071] Figure 5 is a schematic diagram of an exemplary embodiment of an apparatus incorporating an organic light emitting device constructed according to the principles of the invention. DETAILED DESCRIPTION

[0072] In the following description, for the purpose of explanation, many specific details are set forth to provide a thorough understanding of the various exemplary embodiments or implementations of the invention. As used herein, "embodiment" and "implementation" are interchangeable words that are non-limiting examples of devices or methods that employ one or more inventive concepts disclosed herein. However, it is apparent that various exemplary embodiments may be practiced without these specific details or with one or more equivalent arrangements. In other cases, in order to avoid making the various exemplary embodiments unnecessarily vague, well-known structures and devices are shown in block diagram form. In addition, various exemplary embodiments may be different, but need not be exclusive. For example, without departing from the inventive concept, the specific shape, configuration, and characteristics of an exemplary embodiment may be used or implemented in another exemplary embodiment.

[0073] Unless otherwise indicated, the exemplary embodiments shown are to be understood as providing exemplary features of varying details of some of the ways in which the inventive concept may be implemented in practice. Therefore, unless otherwise indicated, the features, components, modules, layers, films, panels, regions and / or aspects, etc. (hereinafter, individually or collectively referred to as "elements") of the various embodiments may be further combined, separated, interchanged and / or rearranged without departing from the inventive concept.

[0074] The use of cross hatching and / or shading is generally provided in the accompanying drawings to make the boundaries between adjacent elements clear. Thus, unless otherwise specified, the presence or absence of cross hatching or shading does not express or indicate any preference or requirement for the specific material, material properties, size, ratio, commonality between the elements shown and / or any other characteristics, attributes, properties, etc. of the elements. In addition, in the accompanying drawings, the size and relative size of the elements can be exaggerated for clarity and / or descriptive purposes. When the exemplary embodiment can be implemented differently, the specific process sequence can be performed in a different order than described. For example, two processes described in succession can be performed substantially simultaneously or in an order opposite to the described order. In addition, the same reference numerals represent the same elements.

[0075] When an element, layer, region or component is referred to as being "on" another element, layer, region or component, "connected to" or "bound to" another element, layer, region or component, the element, layer, region or component may be directly on, directly connected to or directly bound to the other element, layer, region or component, or there may be an intermediate element, intermediate layer, intermediate region or intermediate component. However, when an element, layer, region or component is referred to as being "directly on" another element, layer, region or component, "directly connected to" or "directly bound to" another element, layer, region or component, there are no intermediate elements, intermediate layers, intermediate regions or intermediate components. For this reason, the term "connected" may refer to a physical connection, electrical connection and / or fluid connection with or without an intermediate element. In addition, the D1 axis, D2 axis and D3 axis are not limited to the three axes of a rectangular coordinate system (such as the x-axis, the y-axis and the z-axis), but may be interpreted in a broader sense. For example, the D1 axis, the D2 axis and the D3 axis may be perpendicular to each other, or may 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" may be interpreted as only X, only Y, only Z, or any combination of two or more of X, Y, and Z, such as, for example, 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.

[0076] 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. Thus, the first element discussed below could be named a second element without departing from the disclosed teachings.

[0077] For descriptive purposes, spatially relative terms such as "under," "beneath," "beneath," "down," "over," "up," "above," "higher," "side" (e.g., as in "sidewall"), etc., may be used herein to describe the relationship of one element to another (other) element as shown in the accompanying drawings. Spatially relative terms are intended to encompass different orientations of the device in use, operation, and / or manufacture in addition to the orientation depicted in the accompanying drawings. For example, if the device in the drawings is turned over, an element described as "under" or "beneath" other elements or features would then be positioned "over" the other elements or features. Thus, the exemplary term "under" can include both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or at other orientations), and as such, the spatially relative descriptors used herein should be interpreted accordingly.

[0078] The terms used herein are for the purpose of describing specific embodiments, and are not intended to be limiting. As used herein, unless the context clearly indicates otherwise, the singular "one", "one (kind / person)" and "said (the)" are also intended to include plural forms. In addition, when the terms "comprise", "include" and / or their variations are used in this specification, the description indicates the presence of stated features, integral bodies, steps, operations, elements, components and / or their groups, but does not exclude the presence or addition of one or more other features, integral bodies, steps, operations, elements, components and / or their groups. It should also be noted that, as used herein, the terms "substantially (roughly)", "approximately" and other similar terms are used as approximate terms and are not used as degree terms, so that they are used to explain the inherent deviation of measured values, calculated values ​​and / or provided values ​​that will be recognized by those of ordinary skill in the art.

[0079] As used herein, the term "organic layer" refers to a single layer and / or multiple layers located between a first electrode and a second electrode of an organic light-emitting device. Materials included in the "organic layer" are not limited to organic materials.

[0080] Various exemplary embodiments are described herein with reference to cross-sectional views and / or exploded views that are schematic diagrams of idealized exemplary embodiments and / or intermediate structures. As such, variations in the shapes of the illustrations due to, for example, manufacturing techniques and / or tolerances are to be expected. Therefore, the exemplary embodiments disclosed herein should not necessarily be construed as limited to the specific illustrated shapes of the regions, but rather will include deviations in shape due to, for example, manufacturing. In this manner, the regions shown in the accompanying drawings may be schematic in nature, and the shapes of these regions may not reflect the actual shapes of the regions of the device, and as such, no limitation is necessarily intended.

[0081] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure is a part. Terms (such as those defined in common dictionaries) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and should not be interpreted in an idealized or overly formal sense unless expressly defined herein.

[0082] According to some exemplary embodiments of the invention, an organic light-emitting device includes: a first electrode; a second electrode facing the first electrode; and an organic layer located between the first electrode and the second electrode, wherein the organic layer also includes: an emission region including at least one emission layer; a first region located between the first electrode and the emission region; and a second region located between the emission region and the second electrode, the second region including a first layer and a second layer both including organic compounds, the emission layer including a first compound, a second compound, a third compound and a fourth compound, the first compound being a hole transport host compound, the second compound being an electron transport host compound or a bipolar host compound, the third compound being a thermally activated delayed fluorescence (TADF) compound or an organic metal complex satisfying the following formula 1, the fourth compound being a fluorescent compound, and at least one intermediate layer located between the first region and the second region and including at least one of the first compound, the second compound and the fourth compound is also positioned.

[0083] <Formula 1>

[0084] ΔE ST (C3)≤approximately 0.3 eV.

[0085] In formula 1, ΔE ST (C3) is the lowest excited singlet energy level (E S1 (C3)) and the lowest excited triplet energy level (E T1 (C3)).

[0086] In an exemplary embodiment, the first electrode is an anode, the second electrode is a cathode, the first region may include a hole transport region, the hole transport region includes a hole injection layer, a hole transport layer, an emission auxiliary layer, an electron blocking layer, or any combination thereof, and the second region may include an electron transport region, the electron transport region includes a hole blocking layer, a buffer layer, an electron transport layer, an electron injection layer, or any combination thereof.

[0087] For example, the first region may include a first hole transport layer and a second hole transport layer, wherein each of the first hole transport layer and the second hole transport layer may include an organic compound. For example, the second region may include a first electron transport layer and a second electron transport layer, wherein each of the first electron transport layer and the second electron transport layer may include an organic compound.

[0088] In one exemplary embodiment, the first layer and the second layer may be a first electron transport layer and a second electron transport layer, respectively.

[0089] In one exemplary embodiment, the intermediate layer may be located between the first region and the emission region, and may include the first compound, the fourth compound, or a combination thereof.

[0090] For example, the intermediate layer may be located between the hole transport layer and the emission layer and may include the first compound, the fourth compound, or a combination thereof.

[0091] In one exemplary embodiment, the intermediate layer may be located between the second region and the emission region, and may include the second compound, the fourth compound, or a combination thereof.

[0092] For example, the intermediate layer may be located between the electron transport layer and the emission layer and may include the second compound, the fourth compound, or a combination thereof.

[0093] In one exemplary embodiment, the intermediate layer may be in direct contact with the emitting layer.

[0094] For example, the emission region may include n emission layers, and the emission region may include n-1 intermediate layers, wherein the n emission layers and the n-1 intermediate layers may be in direct contact with each other (where n is an integer of 1 or greater). In this case, the n emission layers may all include the same material.

[0095] In one or more exemplary embodiments, the emission region may include two or more emission layers, and the intermediate layer may be in direct contact with the two or more emission layers.

[0096] In one exemplary embodiment, the emission region may include a first emission layer and a second emission layer, and the intermediate layer may be located between the first emission layer and the second emission layer and may include the first compound, the second compound, the fourth compound, or a combination thereof.

[0097] In one or more exemplary embodiments, the emission region may further include a third emission layer between the first emission layer and the second emission layer, and may include a first intermediate layer between the first emission layer and the third emission layer and a second intermediate layer between the second emission layer and the third emission layer.

[0098] In one exemplary embodiment, the first compound, the second compound, and the third compound may be different from each other.

[0099] In one exemplary embodiment, an interval between a maximum peak wavelength of an absorption spectrum of the fourth compound and a maximum peak wavelength of an emission spectrum of the fourth compound is about 35 nm or less.

[0100] The concentration of the fourth compound in the emission layer may be about 1 / 3 or less of the concentration of the third compound. When the concentration of the fourth compound exceeds about 1 / 3 of the concentration of the third compound, it is difficult to maintain charge balance due to hole traps and charge transfer delay in the emission layer, thereby deteriorating lifespan characteristics.

[0101] In one exemplary embodiment, the first layer and the second layer may include a fifth compound and a sixth compound, respectively, wherein the fifth compound may be different from the first, second, and fourth compounds, and the sixth compound may be different from the first, second, and fourth compounds.

[0102] For example, the fifth compound is an electron transport material used in an electron transport region as described below.For example, the sixth compound is an electron transport material used in an electron transport region as described below.

[0103] In one exemplary embodiment, the first compound may be represented by the following Formula 1:

[0104] <Formula 1>

[0105]

[0106] In formula 1,

[0107] X 11 Can be selected from O, S, N (R 19 ) and C(R 19 )(R 20 ),

[0108] R 11 to R 20 Can be independently selected from: *-(L 11 ) a11 -A 11 The groups represented by hydrogen, deuterium, C1-C 60 Alkyl groups, π-electron-deficient nitrogen-free cyclic groups (πelectron-deficient nitrogen-free cyclic groups), -C(Q1)(Q2)(Q3), -Si(Q1)(Q2)(Q3), -B(Q1)(Q2) and -N(Q1)(Q2);

[0109] Substitutions are from deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one selected from

[0110] A π-electron-poor nitrogen-free ring group substituted with at least one of the following groups: a deuterium-substituted ring group, a C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is a nitrogen-free ring group having a poor π electron content of at least one selected from

[0111] L 11 It may be selected from: a π-electron-poor nitrogen-free ring group, -C(Q1)(Q2)-, -Si(Q1)(Q2)-, -B(Q1)- and -N(Q1)-; and

[0112] Substitutions are from deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a nitrogen-free ring group having a poor π electron content of at least one selected from

[0113] a11 can be selected from 1, 2 and 3,

[0114] A 11 It can be selected from: a π-electron-poor nitrogen-free ring group;

[0115] Substitutions are from deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one selected from

[0116] A π-electron-poor nitrogen-free ring group substituted with a deuterium, a C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is a π-electron-poor nitrogen-free ring group of at least one selected from

[0117] R 11 to R 20 Any two or more groups thereof are optionally linked to each other to form one selected from the following: a π-electron-poor nitrogen-free ring group; and a substituted group selected from deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one selected from

[0118] For example, R in Formula 1 11 to R 20 At least one of them can be *-(L 11 ) a11 -A 11 Represents the group.

[0119] For example, R in Formula 111 to R 20 Can be independently selected from: *-(L 11 ) a11 -A 11 The groups represented by hydrogen, deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, alkyl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q1)(Q2)(Q3), -Si(Q1)(Q2)(Q3), -B(Q1)(Q2) and -N(Q1)(Q2);

[0120] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1,1-D-Isopropyl-2-Methyl ...

[0121] phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, benzophenone, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl and dinaphthothiophenyl: all substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl-1-piperidinyl, ...

[0122] For example, L in Equation 1 11 It can be selected from: phenylene, naphthylene, phenanthrenyl, anthrylene, fluoranthenyl, benzo[9,10]phenanthrenyl, phenanthrenyl, pyrenyl, pyrenyl, alkyl, perylene, fluorenylene, carbazolylene, dibenzofuranylene, dibenzothiophenylene, -C(Q1)(Q2)- and -Si(Q1)(Q2)-; and

[0123] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ) is at least one selected from phenylene, naphthylene, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthryl, phenanthrenyl, pyrenyl, pyrenyl, yl, perylene, fluorenylene, carbazolylene, dibenzofuranyl and dibenzothiophenylene.

[0124] In one exemplary embodiment, L in Formula 1 11It may be selected from: phenylene, fluorenylene, carbazolylene, dibenzofuranylene, dibenzothiophenylene, -C(Q1)(Q2)- and -Si(Q1)(Q2)-; and

[0125] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ) is at least one selected from phenylene, fluorenylene, carbazolyl, dibenzofuranyl and dibenzothiophenylene.

[0126] For example, a11 in Formula 1 can be 1 or 2.

[0127] For example, A in Formula 1 11 It can be selected from: phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl-1-piperidinyl, ...

[0128] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1,1-D-Isopropyl-2-Methyl ...

[0129] phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, benzophenone, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl and dinaphthothiophenyl: all substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl-1-piperidinyl, ...

[0130] In one exemplary embodiment, A in Formula 1 11 It may be selected from: phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl and dibenzothiophenyl;

[0131] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ) is at least one selected from phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl and dibenzothiophenyl; and

[0132] Phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl and dibenzothiophenyl groups, all substituted with at least one selected from the following groups: 20 Alkyl, phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, -C(Q 21 )(Q 22 )(Q 23 ) and -Si(Q 21 )(Q 22 )(Q 23 ) is at least one selected from phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl and dibenzothiophenyl.

[0133] In one or more exemplary embodiments, A in Formula 1 11 The following formula 8-1 can be used to

[0134] One of the expressions in Equation 8-5 is:

[0135]

[0136] In formula 8-1 to formula 8-5,

[0137] X 81 Can be selected from O, S, N (R 89 ) and C(R 89 )(R 90 ),

[0138] R 81 to R 90 can be independently selected from hydrogen, deuterium, C1-C 20 alkyl, phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl and dibenzothiophenyl, and

[0139] * indicates the binding site with the adjacent atom.

[0140] In one exemplary embodiment, the first compound may be represented by one of the following Formulas 1-1 to 1-15:

[0141]

[0142] In Formulas 1-1 to 1-15,

[0143] L 11 、a11、A 11 and R 11 to R 20 are the same as those defined in Formula 1, and

[0144] R 11a 、R 11b、R 12a 、R 12b 、R 13a 、R 13b 、R 14a 、R 14b 、R 15a 、R 15b 、R 16a 、R 16b 、R 17a 、R 17b 、R 18a and R 18b Combined with R in formula 1 11 to R 20 The same definition.

[0145] In one exemplary embodiment, the electron transport host compound may include an electron withdrawing group (EWG), and

[0146] The bipolar host compound may include an EWG and an electron donating group (EDG).

[0147] For example, EWG can include π electron-deficient nitrogen-containing rings, -F, -Cl, -Br, -I, cyano, and C1-C 60 At least one selected from the alkyl group, the C1-C 60 The alkyl group is substituted with at least one selected from -F, -Cl, -Br, -I, and a cyano group, and the EDG may include at least one selected from a carbazole group and an amine group (or amino group).

[0148] In one exemplary embodiment, the second compound may be represented by one of Formula 2-1 and Formula 2-2:

[0149] <Formula 2-1>

[0150]

[0151] <Formula 2A>

[0152]

[0153] <Formula 2-2>

[0154]

[0155] In Formula 2-1, Formula 2A, and Formula 2-2,

[0156] Y1 can be selected from a single bond, -O-, -S-, -C(R 24 )(R 25 )-、-N(R24 )-、-Si(R 24 )(R 25 )-, -C(=O)-, -S(=O)2-, -B(R 24 )-、-P(R 24 )- and -P(=O)(R 24 )-,

[0157] k1 can be 0 or 1,

[0158] CY 21 and CY 22 Can be independently C5-C 60 Carbocyclic or C1-C 60 heterocyclic group,

[0159] L 21 To L 27 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0160] Ar 21 to Ar 27 can be independently selected from the group represented by formula 2A, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group,

[0161] Ar 21 to Ar 23 At least one of may be a group represented by Formula 2A,

[0162] a21 to a27 may each independently be an integer from 0 to 3,

[0163] b21 to b27 may each independently be an integer from 1 to 8,

[0164] c21 and c22 may each independently be an integer from 1 to 20,

[0165] c23 can be an integer from 1 to 5,

[0166] n21 and n22 may each independently be an integer from 1 to 8,

[0167] X 21 To X 23 can all independently be C or N,

[0168] When X 21 To X 23 When each is C, from R 21 to R 23 At least one selected from -F, cyano, or a C1-C1-substituted group substituted with at least one selected from -F and cyano 60 alkyl,

[0169] X 24 To X 26 can be independently C(R 26 ) or N,

[0170] From X 24 To X 26 At least one of the selected ones may be N,

[0171] R 21 to R 26 Can be independently selected from *-(L 27 ) a27 -(Ar 27 ) b27 , hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60Heteroaryl, substituted or unsubstituted C1-C 60 Heteroaryloxy, substituted or unsubstituted C1-C 60 heteroarylthio group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) and -P(=O)(Q1)(Q2),

[0172] Ar 21 to Ar 27 and R 21 to R 26 Any two or more groups therein may be optionally linked to each other to form a substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group,

[0173] * indicates the binding site with the adjacent atom, and

[0174] From the substituted C5-C 60 Carbocyclic, substituted C1-C 60 Heterocyclic, substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkynyl, substituted C1-C 60 Alkoxy, substituted C3-C 10 Cycloalkyl, substituted C1-C 10 Heterocycloalkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocycloalkenyl, substituted C6-C 60 Aryl, substituted C6-C 60 Aryloxy, substituted C6-C 60 Arylthio, substituted C1-C 60 Heteroaryl, substituted C1-C 60 Heteroaryloxy, substituted C1-C 60 At least one substituent selected from the group consisting of the heteroarylthio group, the substituted monovalent non-aromatic condensed polycyclic group and the substituted monovalent non-aromatic condensed heteropolycyclic group may be selected from the group consisting of:

[0175] Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0176] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0177] C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups;

[0178] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and

[0179] -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 ),

[0180] Among them, Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, monovalent non-aromatic condensed heteropolycyclic groups, biphenyl groups, and terphenyl groups.

[0181] In one exemplary embodiment, CY in Formula 2-1 21 and CY 22 Each of the following groups may be independently selected from phenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, benzothiazolyl, benzoxazolyl, isobenzoxazolyl, benzodiazepine, benzophenone ...

[0182] In one exemplary embodiment, CY in Formula 2-1 21 and CY 22 Each of the groups may be independently selected from phenyl, naphthyl, fluorenyl, carbazolyl, pyridyl, phenanthroline, azafluorenyl and azacarbazolyl.

[0183] In one exemplary embodiment, L in Formula 2-1, Formula 2A, and Formula 2-2 21 To L 27 Each of the following may be independently selected from: phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthrylene, fluoranthenylene, benzo[9,10]phenanthrenylene, py ... phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene, and azacarbazolylene; and

[0184] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyridyl azinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, azacarbazolyl, -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 ),-C(=O)(Q 31 )、-S(=O)2(Q 31 ) and -P(=O)(Q 31 )(Q 32) is at least one of phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, pyrenylene, pyrenylene phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene , pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene and azacarbazolylene,

[0185] Among them, Q 31 To Q 33 Can be independently selected from C1-C 10 Alkyl, C1-C 10 Alkoxy, phenyl, substituted C1-C 10 Alkyl groups include phenyl, biphenyl, terphenyl and naphthyl.

[0186] In one exemplary embodiment, Ar in Formula 2-1, Formula 2A, and Formula 2-2 21 to Ar 27 may be each independently a group represented by one selected from Formula 5-1 to Formula 5-26 and Formula 6-1 to Formula 6-55, and from Ar 21 to Ar 23 At least one selected from may be a group represented by one selected from Formula 6-1 to Formula 6-55:

[0187]

[0188]

[0189]

[0190]

[0191] In Formulas 5-1 to 5-26 and 6-1 to 6-55,

[0192] Y 31 and Y 32can be independently O, S, C (Z 34 )(Z 35 )、N(Z 34 ) or Si(Z 34 )(Z 35 ),

[0193] Z 31 , Z 32 , Z 34 and Z 35 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkenyl, C1-C 20 Alkynyl, C1-C 20 alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, phenanthrenyl, anthracenyl, perylenyl, pyridyl, pyrimidinyl, carbazolyl and triazinyl,

[0194] e2 can be 1 or 2,

[0195] e3 is an integer from 1 to 3,

[0196] e4 is an integer from 1 to 4,

[0197] e5 is an integer from 1 to 5,

[0198] e6 can be an integer from 1 to 6,

[0199] e7 can be an integer from 1 to 7,

[0200] e9 can be an integer from 1 to 9, and

[0201] * indicates the binding site with the adjacent atom.

[0202] In one exemplary embodiment, R in Formula 2-1, Formula 2A, and Formula 2-2 21 to R 26 Can be independently selected from: *-(L 27 ) a27 -(Ar 27 ) b27 , hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, C1-C 20 Alkyl, C1-C 20Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, naphthyl, fluorenyl, spirobifluorenyl, spirofluorene benzofluorenyl, benzofluorenyl, dibenzofluorenyl, pyrenyl, phenanthenyl, phenanthenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrrolyl, thienyl, furanyl, thiolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl, isoindolyl, indazolyl, purinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridine phenyl, phenanthroline, phenazinyl, benzimidazolyl, benzofuranyl, benzothienyl, benzothiorolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothienyl, dibenzothiorolyl, carbazolyl, benzocarbazolyl, dibenzocarbazolyl, thiadiazolyl, imidazopyridinyl, imidazopyrimidinyl, oxazolopyridinyl, thiazolopyridinyl, benzonaphthyridinyl, azafluorenyl, azaspirobifluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothienyl, azadibenzothiorolyl, biphenyl, and terphenyl; and

[0203] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, naphthyl, fluorenyl, spirobifluorenyl, spirofluorene benzofluorenyl, benzofluorenyl, dibenzofluorenyl, pyrenyl, phenanthenyl, phenanthenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrrolyl, thienyl, furanyl, thiolyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl, isoindolyl, indazolyl, purinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridine phenyl, phenanthroline, phenazinyl, benzimidazolyl, benzofuranyl, benzothienyl, benzothiophene, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothienyl, dibenzothiophene, carbazolyl, benzocarbazolyl, dibenzocarbazolyl, thiadiazolyl, imidazopyridinyl, imidazopyrimidinyl, oxazolopyridinyl, thiazopyridinyl, benzonaphthyridinyl, azafluorenyl, azaspirobifluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothienyl, azadibenzothiophene, biphenyl and terphenyl. at least one of cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, naphthyl, fluorenyl, spirobifluorenyl, spirofluorene benzofluorenyl, benzofluorenyl, dibenzofluorenyl, pyrenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrrolyl, thienyl, furanyl, thirol, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrazinyl, pyrimidinyl, pyridazinyl, indolyl, isoindolyl, indazolyl, purinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, benzofuranyl, benzothienyl, benzothiorolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, dibenzofuranyl, dibenzothienyl, dibenzothiorolyl, carbazolyl, benzocarbazolyl, dibenzocarbazolyl, thiadiazolyl, imidazopyridyl, imidazopyrimidyl, oxazolopyridyl, thiazolopyridyl, benzonaphthyridinyl, azafluorenyl, azaspirobifluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothienyl, azadibenzothiorolyl, biphenyl and terphenyl.

[0204] In one exemplary embodiment, the third compound may be represented by one selected from Formula 3 and Formula 4-1 to Formula 4-3:

[0205] <Formula 3>

[0206] M 31 (L 31 ) n31 (L 32) n32

[0207]

[0208] <Formula 4-1>

[0209] (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41

[0210] <Formula 4-2>

[0211] (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41 -(L 42 ) a42 -(D 42 ) n42

[0212] <Formula 4-3>

[0213] (A 41 ) m41 -(L 41 ) a41 -(D 41 ) n41 -(L 42 ) a42 -(A 42 ) m42 ,

[0214] In Formula 3, Formula 3A to Formula 3D, and Formula 4-1 to Formula 4-3,

[0215] M 31 can be selected from the first period transition metals, the second period transition metals and the third period transition metals of the periodic table,

[0216] L 31 It may be a ligand represented by one selected from Formula 3A to Formula 3D,

[0217] L 32 can be selected from monodentate ligands, bidentate ligands and tridentate ligands,

[0218] n31 can be 1 or 2,

[0219] n32 may be selected from 0, 1, 2, 3 and 4,

[0220] A 31 To A 34Can be independently selected from C5-C 30 Carbocyclic and C1-C 30 heterocyclic group,

[0221] T 31 to T 34 can be independently selected from single bonds, double bonds, *-O-*', *-S-*', *-C(=O)-*', *-S(=O)-*', *-C(R 35 )(R 36 )-*'、*-C(R 35 )=C(R 36 )-*'、*-C(R 35 )=*'、*-Si(R 35 )(R 36 )-*'、*-B(R 35 )-*'、*-N(R 35 )-*' and *-P(R 35 )-*',

[0222] k31 to k34 can be independently selected from 1, 2 and 3,

[0223] Y 31 To Y 34 can be independently selected from single bonds, *-O-*', *-S-*', *-C(R 37 )(R 38 )-*'、*-Si(R 37 )(R 38 )-*'、*-B(R 37 )-*'、*-N(R 37 )-*' and *-P(R 37 )-*',

[0224] *1, *2, *3 and *4 all indicate the same 31 The binding site,

[0225] R 31 to R 38 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 Heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -C(Q1)(Q2)(Q3), -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), wherein R 31 to R 38 can be optionally linked to each other to form a substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group,

[0226] b31 to b34 may each independently be an integer from 0 to 10,

[0227] A 41 and A 42 can be independently selected from: a π-electron-poor nitrogen-containing ring group, -C(R 41 )(R 42 )(R 43 )、-Si(R 41 )(R 42 )(R 43 )、-B(R 41 )(R 42 ) and -N(R 41 )(R 42 );

[0228] Substitutions are from deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-containing ring, -C(R 41 )(R 42 )(R 43 )、-Si(R 41 )(R 42 )(R 43 )、-B(R 41 )(R 42 ) and -N(R 41 )(R 42 ) is a π-electron-poor nitrogen-containing ring group of at least one selected from

[0229] A nitrogen-containing ring group having a poor π electron content and substituted with at least one selected from the following groups: 60 Alkyl groups, π-electron-poor nitrogen-containing ring groups, -C(R 41 )(R 42 )(R 43 )、-Si(R 41 )(R 42 )(R 43 )、-B(R 41 )(R 42 ) and -N(R 41 )(R 42 ) is a nitrogen-containing ring group containing at least one of the poor π electrons selected from

[0230] R 41 to R 43 can each independently optionally be connected to L via *-(z)-*' 41 or L 42 , to form C5-C 30 Carbocyclic and C1-C 30 heterocyclic group,

[0231] z can be selected from single bonds, O, S, N(R 44 )、Se、Si(R 44 )(R 45 ) and C(R 44 )(R 45 ),

[0232] R 41 to R 45 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -C(Q1)(Q2)(Q3), -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),

[0233] m41 and m42 can be independently selected from 1, 2 and 3,

[0234] D 41 and D 42 They may be independently selected from: -F, cyano, π-electron-poor nitrogen-free ring groups, C(=O)-containing groups, P(=O)-containing groups and P(=S)-containing groups;

[0235] All are substituted with deuterium, -F, cyano, C1-C 60 At least one selected from an alkyl group and a π-electron-poor nitrogen-free ring group, a π-electron-poor nitrogen-free ring group, a C(═O)-containing group, a P(═O)-containing group, and a P(═S)-containing group;

[0236] C1-C ... 60 Alkyl groups and π-electron-poor nitrogen-free ring groups;

[0237] A π-electron-poor nitrogen-free ring group, a C(═O)-containing group, a P(═O)-containing group, and a P(═S)-containing group, all substituted with at least one selected from the following groups: a deuterium-containing group, -F, a cyano group, a C1-C 60 C1-C1 of at least one selected from an alkyl group and a π-electron-poor nitrogen-free ring group 60 Alkyl groups and π-electron-poor nitrogen-free ring groups;

[0238] are substituted with at least one selected from the following groups 60 Alkyl and π-electron-poor nitrogen-free ring groups: substituted with deuterium, -F, cyano, C1-C 60 at least one selected from an alkyl group and a π-electron-poor nitrogen-free ring group; and

[0239] are substituted with at least one selected from the following groups 60 Alkyl and π-electron-poor nitrogen-free ring group: C1-C ... 60 Alkyl groups and π-electron-poor nitrogen-free ring groups,

[0240] n41 and n42 can be independently selected from 1, 2 and 3,

[0241] L 41 and L 42 can be independently substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group,

[0242] a41 and a42 can be independently selected from 0, 1, 2 and 3, and

[0243] Substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkynyl, substituted C1-C 60 Alkoxy, substituted C3-C 10 Cycloalkyl, substituted C1-C 10 Heterocycloalkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocycloalkenyl, substituted C6-C 60 Aryl, substituted C6-C 60 Aryloxy, substituted C6-C 60 Arylthio, substituted C1-C 60 Heteroaryl, substituted monovalent non-aromatic condensed polycyclic group, substituted monovalent non-aromatic condensed heteropolycyclic group, substituted C5-C 60 Carbocyclic and substituted C1-C 60 At least one substituent in the heterocyclic group may be selected from:

[0244] Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0245] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C60 Heteroarylthio, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0246] C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups;

[0247] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q22 )(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 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and

[0248] -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 ),

[0249] Among them, Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl group and terphenyl group.

[0250] For example, M in Equation 3 31 It can be selected from platinum (Pt), palladium (Pd), copper (Cu), silver (Ag), gold (Au), rhodium (Rh), iridium (Ir), ruthenium (Ru), osmium (Os), titanium (Ti), zirconium (Zr), hafnium (Hf), europium (Eu), terbium (Tb) and thulium (Tm).

[0251] In one exemplary embodiment, M in Formula 3 31 It can be selected from Pt and Ir.

[0252] For example, A in Formula 3A to Formula 3D 31 To A 34 each independently may be: i) a first ring; ii) a second ring; iii) a condensed ring in which two or more first rings are condensed with each other; iv) a condensed ring in which two or more second rings are condensed with each other; or v) a condensed ring in which one or more first rings and one or more second rings are condensed with each other,

[0253] wherein the first ring is selected from cyclopentyl, cyclopentenyl, cyclopentadienyl, furyl, thienyl, pyrrolyl, a borole group, a phosphole group, thiolyl, germoleyl, group), selenophenyl, oxazolyl, dihydrooxazolyl, isoxazolyl, dihydroisoxazolyl, oxadiazolyl, dihydrooxadiazolyl, isoxadiazolyl, dihydroisoxadiazolyl, oxatriazolyl, dihydrooxatriazolyl, isoxatriazolyl, dihydroisoxatriazolyl, thiazolyl, dihydrothiazolyl, isothiazolyl, dihydroisothiazolyl, thiadiazolyl, dihydrothiadiazolyl, isothiadiazolyl, dihydroisothiadiazolyl, thiatriazolyl, dihydrothiatriazolyl, isothiatriazolyl, dihydroisothiatriazolyl, pyrazolyl, dihydropyrazolyl, imidazolyl, dihydroimidazolyl, triazolyl, dihydrotriazolyl, tetrazolyl, dihydrotetrazolyl, azathiarolyl, diazathiarolyl and triazathiarolyl, and

[0254] The second ring can be selected from cyclohexyl, cyclohexenyl, cyclohexadienyl, adamantyl, norbornyl, norbornenyl, phenyl, pyridyl, dihydropyridyl, tetrahydropyridyl, pyrimidinyl, dihydropyrimidinyl, tetrahydropyrimidinyl, pyrazinyl, dihydropyrazinyl, tetrahydropyrazinyl, pyridazinyl, dihydropyridazinyl, tetrahydropyridazinyl and triazinyl.

[0255] In one exemplary embodiment, A in Formula 3A to Formula 3D 31 To A 34 can be independently selected from phenyl, naphthyl, anthracenyl, phenanthrenyl, benzo[9,10]phenanthrenyl, pyrenyl, yl, furyl, thienyl, thiaryl, indenyl, fluorenyl, benzofuranyl, dibenzofuranyl, benzothienyl, dibenzothienyl, benzothiaryl, dibenzothiaryl, indolyl, carbazolyl, indenopyridinyl, indolopyridinyl, benzofuropyridinyl, benzothienopyridinyl, benzothiarrolopyridinyl, indenopyrimidinyl, indolopyrimidinyl, benzofuropyrimidinyl, benzothienopyrimidinyl, benzothiarrolopyrimidinyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phthalide oxazolyl, phenanthrolinyl, pyrrolyl, pyrazolyl, imidazolyl, dihydroimidazolyl, triazolyl, dihydrotriazolyl, oxazolyl, dihydrooxazolyl, isoxazolyl, thiazolyl, dihydrothiazolyl, isothiazolyl, oxadiazolyl, dihydrooxadiazolyl, thiadiazolyl, dihydrothiadiazolyl, benzopyrazolyl, benzimidazolyl, dihydrobenzimidazolyl, imidazopyridinyl, imidazopyrimidinyl, imidazopyrazinyl, benzoxazolyl, dihydrobenzoxazolyl, benzothiazolyl, dihydrobenzothiazolyl, benzoxadiazolyl, dihydrobenzoxadiazolyl, benzothiadiazolyl, and dihydrobenzothiadiazolyl.

[0256] For example, T in Formula 3A to Formula 3D 31 to T 34 can be independently selected from single bonds, double bonds, *-O-*', *-S-*', *-C(R 35 )(R 36 )-*' and *-N(R 35 )-*'.

[0257] For example, Y in Formula 3A to Formula 3D 31 To Y 34 and *-S-*' may each be independently selected from a single bond, *-O-*' and *-S-*'.

[0258] For example, R in Formula 3A to Formula 3D 31 to R 38 can be independently selected from: hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, C1-C 20 Alkyl and C1-C 20alkoxy;

[0259] Phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, quinazolinyl, azafluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothiophenyl, diazafluorenyl, diazacarbazolyl, diazadibenzofuranyl, and diazadibenzothiophenyl; and

[0260] All are substituted with deuterium, -F, -Cl, -Br, -I, cyano, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, a phenyl group, a biphenyl group, a terphenyl group, a naphthiophene group, a phenanthrenyl group, ... yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, quinazolinyl, azafluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothiophenyl, diazafluorenyl, diazacarbazolyl, diazadibenzofuranyl, and diazadibenzothiophenyl; and

[0261] -B(Q1)(Q2) and -N(Q1)(Q2), and

[0262] Q1 and Q2 can be independently selected from hydrogen, deuterium and C1-C 20 alkyl;

[0263] Phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, quinazolinyl, azafluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothiophenyl, diazafluorenyl, diazacarbazolyl, diazadibenzofuranyl, and diazadibenzothiophenyl; and

[0264] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, a phenyl group, a biphenyl group, a terphenyl group, a naphthiophene group, a phenanthrenyl group, ... thiophenyl, dibenzofuranyl, dibenzothiophene, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophene, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophene, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, quinazolinyl, azafluorenyl, azacarbazolyl, azadibenzofuranyl, azadibenzothiophene, diazafluorenyl, diazacarbazolyl, diazadibenzofuranyl and diazadibenzothiophene.

[0265] In one exemplary embodiment, R in Formulas 3A to 3D 31 to R 38 can be independently selected from: hydrogen, deuterium, -F, -Cl, -Br, -I, cyano, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, methoxy, ethoxy, propoxy and butoxy;

[0266] Phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1,1-D-Hydroxy-2,1-Dibenzo-1-Yl,1-D-Hydroxy-1,1-Dibenzo-1-Yl,1-D-Hydroxy-2 ...

[0267] are substituted with deuterium, -F, -Cl, -Br, -I, cyano, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, methoxy, ethoxy, propoxy, butoxy, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, at least one selected from the group consisting of phenyl, biphenyl, terphenyl, naphthyl, phenanthryl, benzo[9,10] ... 1-Hydroxy-1,1-D-X-Yl ...

[0268] -B(Q1)(Q2) and -N(Q1)(Q2), and

[0269] Q1 and Q2 can be independently selected from hydrogen, deuterium, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl and tert-butyl;

[0270] Phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy, ...

[0271] are substituted with deuterium, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, at least one selected from the group consisting of phenyl, biphenyl, terphenyl, naphthyl, phenanthryl, benzo[9,10] ... 1-Hydroxy-1-Methyl-2-thiophene-1-ol, ...

[0272] In one exemplary embodiment, the third compound may be represented by one selected from the following Formula 3-1 and Formula 3-2:

[0273]

[0274] In formula 3-1 and formula 3-2,

[0275] X 31 To X 40 may be independently selected from N and C, and

[0276] The remaining components can all be understood by referring to their corresponding descriptions provided herein.

[0277] In formula 3-1 and formula 3-2, X 31 and X 32 Can be independently A31 A ring member, and X 33 To X 40 You can also refer to the combination of formula 3-1 and formula 3-2, X 31 and X 32 Description provided to understand.

[0278] For example, D in Equations 4-1 to 4-3 41 and D 42 and (iii) and (iv) may each independently be a group represented by Formula 12:

[0279] <Formula 12>

[0280]

[0281] In formula 12,

[0282] X 121 Can be selected from O, S, N (R 123 ) and C(R 123 )(R 124 ),

[0283] X 122 Can be selected from single bond, O, S, N(R 125 ) and C(R 125 )(R 126 ),

[0284] A 121 and A 122 It can be a π-electron-poor nitrogen-free ring group,

[0285] R 121 to R 126 Can be independently selected from: binding site, hydrogen, deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 );as well as

[0286] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is at least one selected from phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl ... 123 and R 124 can be optionally linked to each other to form a π-electron-poor nitrogen-free ring group, R 125 and R 126 can be optionally linked to each other to form a π-electron-poor nitrogen-free ring group, and from R 121 to R 126 At least one of the selected ones is a binding site, and

[0287] b121 and b122 can be independently selected from 1, 2, 3, 4, 5 and 6,

[0288] Among them, Q 21 To Q 23 and Q 31 To Q 33 Same as described above.

[0289] For example, A in Formula 4-1 to Formula 4-3 41 and A 42 can be independently selected from: -F, cyano, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, quinazolinyl, -B(R 41 )(R 42 ) and groups represented by formula 13-1 and formula 13-2;

[0290] All are substituted with deuterium, -F, cyano, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, benzophenone, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dibenzofuranyl, dinaphthothiophenyl, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazine at least one selected from the group consisting of pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl and quinazolinyl;

[0291] each of the C1-C1-C1-D substituted with at least one selected from -F, cyano, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, and quinazolinyl groups; 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl-1-piperidinyl, ...

[0292] pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl and quinazolinyl, all substituted with at least one selected from the group consisting of deuterium, -F, cyano, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, at least one C1-C1 selected from the group consisting of benzophenone, benzothiophene, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophene, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophene, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, and quinazolinyl. 20Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, and quinazolinyl;

[0293] are substituted with at least one selected from the following groups 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, benzophenone, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl and dinaphthothiophenyl: all substituted with deuterium, -F, cyano, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, benzophenone, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dibenzofuranyl, dinaphthothiophenyl, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl at least one selected from the group consisting of pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl and quinazolinyl; and

[0294] are substituted with at least one selected from the following groups 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-C 1-C 2-d substituted 1 ... 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, benzophenone, benzofluorenyl, fluorenyl, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl and dinaphthothiophenyl:

[0295]

[0296] In Equations 13-1 and 13-2,

[0297] A 41 To A 43 Can be independently selected from C5-C 30 Carbocyclic and C1-C 30 heterocyclic group,

[0298] R 42 and R 441 to R 443 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -C(Q1)(Q2)(Q3), -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),

[0299] b441 to b443 may each independently be an integer from 0 to 10,

[0300] Z 41 and Z 42 Same as described in conjunction with z, and

[0301] * indicates the binding site with the adjacent atom.

[0302] For example, A in Equation 13-1 and Equation 13-2 41 To A 43 can be independently selected from phenyl, naphthyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo [9, 10] phenanthrenyl, phenanthrenyl, pyrenyl, 1-Hydroxy, ...

[0303] For example, R in Equation 13-1 and Equation 13-2 42 and R 441 to R 443 can be independently selected from: hydrogen, deuterium, -F, cyano, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridinyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, and quinazolinyl; and

[0304] All are substituted with deuterium, -F, cyano, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, at least one C1-C1 selected from the group consisting of benzophenone, benzothiophene, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophene, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophene, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, and quinazolinyl. 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, pyrazolyl, imidazolyl, triazolyl, oxazolyl, isoxazolyl, oxadiazolyl, isoxadiazolyl, thiazolyl, isothiazolyl, thiadiazolyl, isothiadiazolyl, pyridyl, pyrazinyl, pyridazinyl, pyrimidinyl, triazinyl, quinolyl, isoquinolyl, naphthyridinyl, quinoxalinyl, and quinazolinyl, and

[0305] b441 to b443 can each be independently selected from 1, 2, 3, 4, 5 and 6.

[0306] For example, L in Formula 4-1 to Formula 4-3 41 and L 42 can be independently selected from: phenylene, naphthylene, phenanthrenyl, anthrylene, fluoranthenyl, benzo[9,10]phenanthrenyl, phenanthrenyl, pyrenyl, pyrenyl, alkyl, perylene, fluorenylene, carbazolylene, dibenzofuranylene, dibenzothiophenylene, -C(Q1)(Q2)- and -Si(Q1)(Q2)-; and

[0307] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33) is at least one selected from phenylene, naphthylene, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthryl, phenanthrenyl, pyrenyl, pyrenyl, ylene, perylene, fluorenylene, carbazolylene, dibenzofuranylene and dibenzothiophenylene,

[0308] Among them, Q1, Q2 and Q 31 To Q 33 Same as described above.

[0309] In one exemplary embodiment, L in Formula 4-1 to Formula 4-3 41 and L 42 may be independently selected from: phenylene, fluorenylene, carbazolylene, dibenzofuranylene, dibenzothiophenylene, -C(Q1)(Q2)- and -Si(Q1)(Q2)-; and

[0310] All are substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, -C(Q 31 )(Q 32 )(Q 33 ) and -Si(Q 31 )(Q 32 )(Q 33 ) is at least one selected from phenylene, fluorenylene, carbazolyl, dibenzofuranyl and dibenzothiophenylene,

[0311] Among them, Q1, Q2 and Q 31 To Q 33 Same as described above.

[0312] In one exemplary embodiment, the fourth compound may be represented by one of Formula 5(1), Formula 5(2), Formula 5(3), and Formula 501:

[0313] <Formula 5(1)>

[0314]

[0315] <Formula 5(2)>

[0316]

[0317] <Formula 5(3)>

[0318]

[0319] <Formula 501>

[0320]

[0321] In equations 5(1) to 5(3),

[0322] Y 51 To Y 53 can all independently be N, B or P,

[0323] X 51 To X 55 can be independently a single bond, O, S, N(R 55 )、B(R 55 )、C(R 55 )(R 56 ) or Si(R 55 )(R 56 ),

[0324] X 56 N, C (R 55 ) or Si(R 55 ),

[0325] m51 and m54 can each independently be 0, 1 or 2, wherein when m51 is 0, A 51 and A 52 Not connected to each other, when m54 is 0, A 53 and A 54 Not connected to each other,

[0326] A 51 To A 55 Can be independently C5-C 60 Carbocyclic or C1-C 60 heterocyclic group,

[0327] R 51 to R 60 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -C(=O)(Q1), -N(Q1)(Q2), -P(=O)(Q1)(Q2) and -S(=O)2(Q1)(Q2),

[0328] In formula 501,

[0329] Ar 501 It can be substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group,

[0330] L 501 To L 503 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0331] xd1 to xd3 may each independently be an integer from 0 to 3,

[0332] R 501 and R 502 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, a51 to a54 and a60 may each independently be 0 to 10,

[0333] xd4 can be an integer from 1 to 6, and

[0334] Substituted C5-C 60 Carbocyclic, substituted C1-C 60 Heterocyclic, substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkynyl, substituted C1-C 60 Alkoxy, substituted C3-C 10 Cycloalkyl, substituted C1-C 10 Heterocycloalkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocycloalkenyl, substituted C6-C 60 Aryl, substituted C6-C 60 Aryloxy, substituted C6-C 60 Arylthio, substituted C1-C 60 Heteroaryl, substituted C1-C 60 Heteroaryloxy, substituted C1-C 60 Heteroarylthio, substituted monovalent non-aromatic condensed polycyclic group, substituted monovalent non-aromatic condensed heteropolycyclic group, substituted C3-C 10 Cycloalkylene, substituted C1-C 10 Heterocycloalkylene, substituted C3-C 10 Cycloalkenylene, substituted C1-C 10 Heterocycloalkenylene, substituted C6-C 60 Arylene, substituted C1-C 60 At least one substituent in the heteroarylene group, the substituted divalent non-aromatic condensed polycyclic group, and the substituted divalent non-aromatic condensed heteropolycyclic group may be selected from the group consisting of:

[0335] Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0336] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0337] C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups;

[0338] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and

[0339] -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 ),

[0340] Among them, Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, monovalent non-aromatic condensed heteropolycyclic groups, biphenyl groups, and terphenyl groups.

[0341] In an exemplary embodiment, the first compound may be selected from the compounds in Group I,

[0342] The second compound may be selected from the compounds in Group II,

[0343] The third compound is selected from the compounds in Group III-1 and Group III-2, and

[0344] The fourth compound may be selected from the compounds in Group IV:

[0345] <Group I>

[0346]

[0347] <Group II>

[0348]

[0349]

[0350] <Group III-1>

[0351]

[0352] <Group III-2>

[0353]

[0354] <Group IV>

[0355]

[0356] The first compound and the second compound may be substantially non-luminescent.

[0357] For example, the third compound and the fourth compound can emit light.

[0358] For example, the third compound may be a thermally activated delayed fluorescence (TADF) compound and may be a TADF emitter.

[0359] For example, the third compound may be a phosphorescent metal complex and may be a phosphorescent emitter.

[0360] The third compound may have a maximum emission wavelength of about 450 nm to about 550 nm, but exemplary embodiments are not limited thereto.

[0361] In detail, the third compound in the emission layer may receive energy from the formed excitons and emit blue delayed fluorescence or blue phosphorescence without directly participating in the formation of the excitons.

[0362] By including the above-described intermediate layer between the hole transport region and the emission layer, between the electron transport region and the emission layer, or within the emission layer, exciton delocalization in which excitons are dispersed is achieved, resulting in improved efficiency and longer lifetime.

[0363] In addition, since the electron transport region may further include two or more organic layers, the electron movement speed may be easily adjusted to achieve a balance between holes and electrons, thereby reducing the driving current and increasing the driving lifespan.

[0364] In addition, since the emission layer contains the first compound (hole transport compound), the second compound (electron transport compound), the third compound (ΔE ST ≤ approximately 0.3 eV) and a fourth compound (fluorescent dopant), so energy transfer to the dopant can be easily achieved, and due to the high fluorescence mechanism, efficiency can be improved and a triplet exciton bondage effect can be obtained.

[0365] Typically, when electrons cannot be efficiently injected from the electron transport region into the emissive layer, charge accumulates at the interface between the emissive layer and the electron transport region, causing interface degradation. Conversely, when holes cannot be efficiently injected from the hole transport region into the emissive layer, charge accumulates at the interface between the emissive layer and the hole transport region, causing interface degradation. As a result, the lifespan of the organic light-emitting device is reduced.

[0366] Because the second compound is essentially a compound containing an electron-transporting group, the second compound can be easily used to adjust the electron-transporting properties of the organic light-emitting device. Because the first compound is essentially a compound containing a hole-transporting group, the first compound can be easily used to adjust the hole-transporting properties of the organic light-emitting device. In this way, the charge balance in the emissive layer of the organic light-emitting device can be optimized.

[0367] An amount of the first compound in the emission layer is in a range of about 10 wt % to about 90 wt % based on the total weight of the emission layer.

[0368] An amount of the second compound in the emission layer may be in a range of about 10 wt % to about 90 wt % based on the total weight of the emission layer.

[0369] The amount of the third compound in the emission layer may be less than or equal to the amount of the first compound and the amount of the second compound.

[0370] The amount of the fourth compound in the emission layer may be less than or equal to the amount of the first compound and the amount of the second compound.

[0371] The amount of the third compound in the emission layer may be greater than or equal to the amount of the fourth compound.

[0372] An amount of the fourth compound in the emission layer may be in a range of about 0.1 wt % to about 5 wt % based on the total weight of the emission layer.

[0373] The amount of the fourth compound may be in the range of about 0.01 parts by weight to about 30 parts by weight based on 100 parts by weight of the sum of the amount of the first compound and the amount of the second compound.

[0374] When the first compound, the second compound, the third compound, and the fourth compound are within these ranges, an organic light emitting device having both improved efficiency and improved lifespan may be provided.

[0375] In one exemplary embodiment, the emission layer may include a first compound, a second compound, a third compound, and a fourth compound.

[0376] Figures 1A to 1E Description

[0377] Figure 1A is a schematic cross-sectional view of an exemplary embodiment of an organic light emitting device constructed according to the principles of the invention. Figure 1B yes Figure 1A Schematic cross-sectional view of the organic layer between the electrodes is shown. Figure 1C yes Figure 1B Schematic cross-sectional view of the emission region of the organic layer. Figure 1D yes Figure 1B Schematic cross-sectional view of the hole transport region of the organic layer. Figure 1E yes Figure 1B Schematic cross-sectional view of the electron transport region of the organic layer.

[0378] Figure 1A 1 is a schematic diagram of an organic light emitting device 10 according to some exemplary embodiments. The organic light emitting device 10 includes a first electrode 110, an organic layer 150, and a second electrode 200.

[0379] In the following, we will combine Figures 1A to 1E A structure of an organic light emitting device 10 and a method of manufacturing the organic light emitting device 10 according to some exemplary embodiments are described.

[0380] First electrode 110

[0381] exist Figures 1A to 1E In the embodiment, a substrate may be additionally located below the first electrode 110 or above the second electrode 200. The substrate may be a glass substrate or a plastic substrate, both of which have excellent mechanical strength, thermal stability, transparency, surface flatness, ease of handling, and waterproofness.

[0382] The first electrode 110 may be formed by depositing or sputtering a material on a substrate for forming the first electrode 110. When the first electrode 110 is an anode, the material for forming the first electrode 110 may be selected from materials having a high work function to facilitate hole injection.

[0383] The first electrode 110 may be a reflective electrode, a semi-transmissive electrode, or a transmissive electrode. When the first electrode 110 is a transmissive electrode, the material used to form the first electrode 110 may be selected from indium tin oxide (ITO), indium zinc oxide (IZO), tin oxide (SnO2), zinc oxide (ZnO), and any combination thereof, but exemplary embodiments 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 110 may be selected from magnesium (Mg), silver (Ag), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), and any combination thereof, but exemplary embodiments are not limited thereto.

[0384] The first electrode 110 may have a single-layer structure or a multi-layer structure including two or more layers. For example, the first electrode 110 may have a three-layer structure of ITO / Ag / ITO, but the structure of the first electrode 110 is not limited thereto.

[0385] Organic layer 150

[0386] The organic layer 150 is positioned on the first electrode 110. The organic layer 150 may include an emission region 160.

[0387] The organic layer 150 may further include a first region 140 (eg, hole transport region 140 ) between the first electrode 110 and the emission region 160 and a second region 180 (eg, electron transport region 180 ) between the emission region 160 and the second electrode 200 .

[0388] The hole transport region 140 in the organic layer 150

[0389] The hole transport region 140 may have: i) a single layer structure including a single layer including a single material; ii) a single layer structure including a single layer including a plurality of different materials; or iii) a multilayer structure having a plurality of layers including a plurality of different materials.

[0390] The hole transport region 140 may include at least one layer selected from a hole injection layer 142 , a hole transport layer 144 , an emission auxiliary layer 146 , and an electron blocking layer 148 .

[0391] For example, the hole transport region 140 may have a single-layer structure or a multi-layer structure, wherein the single-layer structure includes a single layer containing a plurality of different materials, and the multi-layer structure has a hole injection layer / hole transport layer structure, a hole injection layer / hole transport layer / emission assisting layer structure, a hole injection layer / emission assisting layer structure, a hole transport layer / emission assisting layer structure or a hole injection layer / hole transport layer / emission assisting layer structure, wherein, for each structure, the constituent layers are stacked sequentially from the first electrode 110 in the order stated, but the structure of the hole transport region 140 is not limited thereto.

[0392] The hole transport region 140 may include 4,4',4"-tris[phenyl(m-tolyl)amino]triphenylamine (m-MTDATA), 1-N,1-N-bis[4-(diphenylamino)phenyl]-4-N,4-N-diphenylbenzene-1,4-diamine (TDATA), 4,4',4"-tris[2-naphthyl(phenyl)amino]triphenylamine (2-TNATA), N,N'-di(1-naphthyl)-N,N'-diphenyl-(1,1'-biphenyl) -4,4'-diamine (NPB or NPD), N4,N4'-di(naphthalene-2-yl)-N4,N4'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (β-NPB), N,N'-bis(3-methylphenyl)-N,N'-diphenylbenzidine (TPD), N,N'-bis(3-methylphenyl)-N,N'-diphenyl-9,9-spirobifluorene-2,7-diamine (spiro-TPD), N2,N7-di(1-naphthyl)-N2 ,N7-diphenyl-9,9'-spirobi[9H-fluorene]-2,7-diamine (spiro-NPB), N,N'-di(1-naphthyl)-N,N'-diphenyl-2,2'-dimethyl-(1,1'-biphenyl)-4,4'-diamine (methylated NPB), 4,4'-cyclohexylidenebis[N,N-bis(4-methylphenyl)aniline] (TAPC), N,N,N',N'-tetrakis(3-methylphenyl)-2,2'-dimethylbenzidine (HMTPD) , 4,4',4"-tris(N-carbazolyl)triphenylamine (TCTA), polyaniline / dodecylbenzenesulfonic acid (PANI / DBSA), poly(3,4-ethylenedioxythiophene) / poly(4-styrenesulfonate) (PEDOT / PSS), polyaniline / camphorsulfonic acid (PANI / CSA), polyaniline / poly(4-styrenesulfonate) (PANI / PSS), a compound represented by Formula 201, and a compound represented by Formula 202:

[0393]

[0394] <Formula 201>

[0395]

[0396] <Formula 202>

[0397]

[0398] In Equations 201 and 202,

[0399] L 201 To L 204 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0400] L 205 Can be selected from *-O-*', *-S-*', *-N(Q 201 )-*', substituted or unsubstituted C1-C 20 Alkylene, substituted or unsubstituted C2-C 20 Alkenylene, substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0401] xa1 to xa4 may each independently be an integer from 0 to 3,

[0402] xa5 can be an integer from 1 to 10, and

[0403] R 201 to R 204 and Q 201 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl group, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group.

[0404] For example, in Equation 202, R 201 and R 202 may optionally be linked to each other via a single bond, a dimethyl-methylene group or a diphenyl-methylene group, and R 203 and R 204 They may optionally be linked to one another via single bonds, dimethyl-methylene or diphenyl-methylene groups.

[0405] In one exemplary embodiment, in Equation 201 and Equation 202,

[0406] L 201 To L 205 Can be independently selected from:

[0407] Phenylene, cyclopentadienylene, indenylene, naphthylene, azulenylene, heptalenylene, indacenylene, acenaphthenylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, phenanth ... phenylene, tetraphenylene, perylenene, pentaphenylene, hexaphenylene, pentaphenylene, rubinylene, camphenylene, ovophene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothienylene, dibenzofuranylene, dibenzothienylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothioylene, and pyridylene; and

[0408] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10 Alkyl phenyl, phenyl substituted with -F, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, tetraphenyl, peryl, peryl, pentaphenyl, hexaphenyl, pentacene, rubinyl, camphenyl, ovalenyl, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ) is at least one selected from the group consisting of phenylene, pentalene, indenylene, naphthylene, azulenylene, heptalene, indacenylene, acenaphthenylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, pyrenylene phenylene, tetraphenylene, perylenene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, rubidinylene, coronenylidene, ovophenenylidene, thienylene, furanylene, carbazolylene, indolylene, isoindolylene, benzofuranylene, benzothienylene, dibenzofuranylene, dibenzothienylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothioylene and pyridylene,

[0409] Among them, Q 31 To Q 33 Can be independently selected from C1-C 10 Alkyl, C1-C 10 Alkoxy, phenyl, biphenyl, terphenyl and naphthyl.

[0410] In one or more exemplary embodiments, xa1 to xa4 may each independently be 0, 1, or 2.

[0411] In one or more exemplary embodiments, xa5 may be 1, 2, 3, or 4.

[0412] In one or more exemplary embodiments, R 201 to R 204 and Q 201 Each of the following groups may be independently selected from: phenyl, biphenyl, terphenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, tetracene, perylenyl, pentaphenyl, hexacenyl, pentacene, rubinyl, camphenyl, oophenyl, thienyl, furanyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzosilyl, and pyridyl; and

[0413] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10 Alkyl phenyl, phenyl substituted with -F, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, tetraphenyl, peryl, peryl, pentaphenyl, hexaphenyl, pentacene, rubinyl, camphenyl, ovalenyl, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, -Si(Q 31 )(Q 32 )(Q 33 ) and -N(Q 31 )(Q 32 ) is at least one selected from phenyl, biphenyl, terphenyl, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, tetraphenyl, perylenyl, pentaphenyl, hexaphenyl, pentacene, rubinyl, camphenyl, oophenyl, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiorol and pyridyl,

[0414] Among them, Q 31 To Q 33 Same as described above.

[0415] In one or more exemplary embodiments, from R in Equation 201 201 to R 203 At least one of the selected ones can be independently selected from:

[0416] Fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl; and

[0417] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10 phenyl of an alkyl group, phenyl substituted with -F, naphthyl, fluorenyl, spirobifluorenyl, carbazolyl, dibenzofuranyl, and dibenzothiophenyl, but exemplary embodiments are not limited thereto.

[0418] In one or more exemplary embodiments, in Formula 202, i) R 201 and R 202 may be linked to each other via a single bond, and / or ii) R 203 and R 204 can be connected to each other via a single bond.

[0419] In one or more exemplary embodiments, R in Equation 202 201 to R 204 Can be independently selected from:

[0420] carbazolyl; and

[0421] Substitutions include deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10 A phenyl group of an alkyl group, a phenyl group substituted with -F, a naphthyl group, a fluorenyl group, a spirobifluorenyl group, a carbazolyl group, a dibenzofuranyl group, and a carbazolyl group of at least one selected from the group consisting of a dibenzothiophenyl group, but exemplary embodiments are not limited thereto.

[0422] In one or more exemplary embodiments, the compound represented by Formula 201 may be represented by the following Formula 201A:

[0423] <Formula 201A>

[0424]

[0425] In one or more exemplary embodiments, the compound represented by Formula 201 may be represented by the following Formula 201A(1), but exemplary embodiments are not limited thereto:

[0426] <Formula 201A(1)>

[0427]

[0428] In one or more exemplary embodiments, the compound represented by Formula 201 may be represented by the following Formula 201A-1, but exemplary embodiments are not limited thereto:

[0429] <Formula 201A-1>

[0430]

[0431] In one or more exemplary embodiments, the compound represented by Formula 202 may be represented by the following Formula 202A:

[0432] <Formula 202A>

[0433]

[0434] In one or more exemplary embodiments, the compound represented by Formula 202 may be represented by the following Formula 202A-1:

[0435] <Formula 202A-1>

[0436]

[0437] In Formula 201A, Formula 201A(1), Formula 201A-1, Formula 202A, and Formula 202A-1,

[0438] L 201 To L 203 , xa1 to xa3, xa5 and R 202 to R 204 Same as described above,

[0439] R 211 and R 212 Combined with the description R 203 The same, and

[0440] R 213 to R 217 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, cyclopentyl, cyclohexyl, cycloheptyl, cyclopentenyl, cyclohexenyl, phenyl, biphenyl, terphenyl, substituted C1-C 10 Alkyl phenyl, phenyl substituted with -F, pentalenyl, indenyl, naphthyl, azulenyl, heptalenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, benzothiophene, dibenzofuranyl, dibenzothiophene, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, and pyridyl.

[0441] The hole transport region 140 may include at least one compound selected from Compound HT1 to Compound HT39, but the compound to be included in the hole transport region 140 is not limited thereto:

[0442]

[0443]

[0444]

[0445]

[0446] The thickness of the hole transport region 140 may be about to approximately (For example, approximately to approximately When the hole transport region 140 includes at least one selected from the hole injection layer 142 and the hole transport layer 144, the thickness of the hole injection layer 142 may be in the range of about to approximately (For example, approximately to approximately ), the thickness of the hole transport layer 144 may be in the range of about to approximately (For example, approximately to approximately When the thicknesses of the hole transport region 140, the hole injection layer 142, and the hole transport layer 144 are within these ranges, satisfactory hole transport characteristics can be obtained without significantly increasing the driving voltage.

[0447] The emission assisting layer 146 can improve luminous efficiency by compensating the optical resonance distance according to the wavelength of light emitted by the emission region 160, and the electron blocking layer 148 can block the flow of electrons from the electron transport region 180. The emission assisting layer 146 and the electron blocking layer 148 may include the materials described above.

[0448] p-dopant

[0449] In addition to these materials, the hole transport region 140 may further include a charge generation material for improving conductive properties. The charge generation material may be dispersed in the hole transport region 140 uniformly or non-uniformly.

[0450] The charge generating material may be, for example, a p-dopant.

[0451] In one exemplary embodiment, the p-dopant may have a lowest unoccupied molecular orbital (LUMO) energy level of approximately −3.5 eV or less.

[0452] The p-dopant may include at least one selected from quinone derivatives, metal oxides, and cyano-containing compounds, but exemplary embodiments are not limited thereto.

[0453] For example, the p-dopant may include at least one selected from the following compounds: a quinone derivative such as tetracyanoquinodimethane (TCNQ) or 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4-TCNQ);

[0454] Metal oxides, such as tungsten oxide or molybdenum oxide;

[0455] 1,4,5,8,9,12-Hexaazatriphenylene-hexanitrile (HAT-CN); and

[0456] A compound represented by the following formula 221,

[0457] However, exemplary embodiments are not limited thereto:

[0458] <hat-cn>

[0459]

[0460] <f4-tcnq>

[0461]

[0462] <Formula 221>

[0463]

[0464] In formula 221,

[0465] R 221 to R 223 can be independently selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C1-C 60 Heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group and substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, wherein R 221 to R 223 At least one selected from cyano, -F, -Cl, -Br, -I, C1-C substituted with -F 20 Alkyl, C1-C substituted with -Cl 20 Alkyl, C1-C substituted with -Br 20 Alkyl and C1-C substituted with -I 20 At least one substituent selected from the group consisting of:

[0466] Emission region 160 in organic layer 150

[0467] When the organic light-emitting device 10 is a full-color organic light-emitting device, the emission region 160 may be patterned into a red emission layer, a green emission layer, or a blue emission layer according to the sub-pixel. In one or more exemplary embodiments, the emission region 160 may have a stacked structure of two or more layers selected from a red emission layer, a green emission layer, and a blue emission layer, wherein the two or more layers are in contact with each other or separated from each other. In one or more exemplary embodiments, the emission region 160 may include two or more materials selected from a red light-emitting material, a green light-emitting material, and a blue light-emitting material, wherein the two or more materials are mixed with each other in a single layer to emit white light.

[0468] Reference Figure 1C In one exemplary embodiment, the emission region 160 may include a first emission layer 162 and a second emission layer 166, and the intermediate layer 164 may be located between the first emission layer 162 and the second emission layer 166 and may include the first compound, the second compound, the fourth compound, or a combination thereof as described above. In some exemplary embodiments, the intermediate layer 164 may be located between the first region 140 and the emission region 160 and may include the first compound, the fourth compound, or a combination thereof. For example, the intermediate layer 164 may be located between the hole transport layer 144 and the emission region 160 and may include the first compound, the fourth compound, or a combination thereof. In another exemplary embodiment, the intermediate layer 164 may be located between the second region 180 and the emission region 160 and may include the second compound, the fourth compound, or a combination thereof.

[0469] The thickness of the emission region 160 may be approximately to approximately (For example, approximately to approximately When the thickness of the emission region 160 is within this range, excellent light emitting characteristics can be obtained without significantly increasing the driving voltage.

[0470] The electron transport region 180 in the organic layer 150

[0471] The electron transport region 180 may have: i) a single layer structure including a single layer including a single material; ii) a single layer structure including a single layer including a plurality of different materials; or iii) a multilayer structure having a plurality of layers including a plurality of different materials.

[0472] The electron transport region 180 may include at least one layer selected from a buffer layer 182, a hole blocking layer 184, an electron control layer 186, an electron transport layer 188, and an electron injection layer 194, but exemplary embodiments are not limited thereto. In the illustrated embodiment, the electron transport region 180 may further include a first layer 190 and a second layer 192, both of which contain an organic compound as described above. However, in other exemplary embodiments, each of the first layer 190 and the second layer 192 may independently be a buffer layer 182, a hole blocking layer 184, an electron control layer 186, an electron transport layer 188, and an electron injection layer 194, or a sublayer of one or more of the buffer layer 182, the hole blocking layer 184, the electron control layer 186, the electron transport layer 188, and the electron injection layer 194.

[0473] For example, the electron transport region 180 may have an electron transport layer / electron injection layer structure, a hole blocking layer / electron transport layer / electron injection layer structure, an electron control layer / electron transport layer / electron injection layer structure, or a buffer layer / electron transport layer / electron injection layer structure, wherein for each structure, the constituent layers are sequentially stacked in the order stated from the emission region 160. However, exemplary embodiments of the structure of the electron transport region 180 are not limited thereto.

[0474] The electron transport region 180 (eg, the buffer layer 182 , the hole blocking layer 184 , the electron control layer 186 , or the electron transport layer 188 in the electron transport region 180 ) may include a metal-free compound including at least one π-electron-poor nitrogen-containing ring.

[0475] "π-electron-poor nitrogen-containing ring" means a C1-C2-N3 ... 60 Heterocyclic group.

[0476] For example, the “π-electron-poor nitrogen-containing ring” may be: i) a 5-membered to 7-membered heteromonocyclic group having at least one *-N=*' moiety; ii) a heteropolycyclic group in which two or more 5-membered to 7-membered heteromonocyclic groups, each having at least one *-N=*' moiety, are condensed with each other; or iii) a heteropolycyclic group in which at least one of the 5-membered to 7-membered heteromonocyclic groups, each having at least one *-N=*' moiety, is condensed with at least one C5-C 60 A carbocyclic condensed heteropolycyclic group.

[0477] Examples of the π-electron-poor nitrogen-containing ring include an imidazole ring, a pyrazole ring, a thiazole ring, an isothiazole ring, an oxazole ring, an isoxazole ring, a pyridine ring, a pyrazine ring, a pyrimidine ring, a pyridazine ring, an indazole ring, a purine ring, a quinoline ring, an isoquinoline ring, a benzoquinoline ring, a phthalazine ring, a naphthidine ring, a quinoxaline ring, a quinazoline ring, a cinnoline ring, a phenanthridine ring, an acridine ring, a phenanthroline ring, a phenazine ring, a benzimidazole ring, an isobenzothiazole ring, a benzoxazole ring, an isobenzoxazole ring, a triazole ring, a tetrazole ring, an oxadiazole ring, a triazine ring, a thiadiazole ring, an imidazopyridine ring, an imidazopyrimidine ring, and an azacarbazole ring, but exemplary embodiments are not limited thereto.

[0478] For example, the electron transport region 180 may include a compound represented by the following Formula 601:

[0479] <Formula 601>

[0480] [Ar 601 ] xe11 -[(L 601 ) xe1 -R 601 ] xe21 .

[0481] In Equation 601,

[0482] Ar 601 It can be substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group,

[0483] xe11 can be 1, 2 or 3,

[0484] L 601 Can be selected from substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group,

[0485] xe1 can be an integer from 0 to 5,

[0486] R 601 Can be selected from substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 Heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 601 )(Q 602 )(Q 603 ),-C(=O)(Q 601 )、-S(=O)2(Q 601 ) and -P(=O)(Q 601 )(Q 602 ),

[0487] Q 601 To Q 603 Can be independently C1-C 10 Alkyl, C1-C 10 alkoxy, phenyl, biphenyl, terphenyl or naphthyl, and

[0488] xe21 can be an integer from 1 to 5.

[0489] In one exemplary embodiment, xe11 numbers of Ar 601 and xe21 numbers of R 601 At least one of the may include a π-electron-poor nitrogen-containing ring.

[0490] In one exemplary embodiment, Ar in Formula 601 601 Can be selected from:

[0491] Phenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, benzothiazolyl, benzoxazolyl, isobenzoxazolyl, benzodiazolyl, benzophenanthrenyl, benzophenanthrenyl, benzophenanthridin ...

[0492] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, -Si(Q 31 )(Q 32 )(Q 33 )、-S(=O)2(Q 31 ) and -P(=O)(Q 31 )(Q 32 ) is at least one selected from phenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenalenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, benzophenone ...

[0493] Among them, Q 31 To Q 33 Can be independently selected from C1-C 10 Alkyl, C1-C 10 Alkoxy, phenyl, biphenyl, terphenyl and naphthyl.

[0494] When xe11 in Formula 601 is 2 or greater, two or more Ar 601 can be connected to each other via a single bond.

[0495] In one or more exemplary embodiments, Ar in Formula 601 601 It may be anthracene.

[0496] In one or more exemplary embodiments, the compound represented by Formula 601 may be represented by the following Formula 601-1:

[0497] <Formula 601-1>

[0498]

[0499] In formula 601-1,

[0500] X 614 Can be N or C(R 614 ), X 615 Can be N or C(R 615 ), X 616 Can be N or C(R 616 ), and from X 614 To X 616 At least one of the selected ones may be N,

[0501] L 611 To L 613 Can be independently combined with L 601 Same as described,

[0502] xe611 to xe613 can each independently be the same as described in conjunction with xe1,

[0503] R 611 to R 613 Can independently bind to R 601 Same as described, and

[0504] R 614 to R 616 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl and naphthyl.

[0505] In one exemplary embodiment, L in Equation 601 601 and L in formula 601-1 611 To L 613 Can be independently selected from:

[0506] Phenylene, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthracenylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, phenanthrenylene phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinylene, pyridazinylene, triazinylene, quinolinylene, isoquinolinylene, benzoquinolinylene, phthalazinylene, naphthyridinylene, quinoxalinylene, quinazolinylene, cinnolinylene, phenanthridinylene, acridinylene, phenanthrolinylene, phenazinylene, benzimidazolylene, isobenzothiazolylene, benzoxazolylene, isobenzoxazolylene, triazolylene, tetrazolylene, imidazopyridinylene, imidazopyrimidinylene, and azacarbazolylene; and

[0507] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazine at least one selected from the group consisting of phenylene, naphthylene, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl and azacarbazolyl, naphthylene, fluorenylene, spirobifluorenylene, benzofluorenylene, dibenzofluorenylene, phenanthrenylene, anthrylene, fluoranthenylene, benzo[9,10]phenanthrenylene, pyrenylene, pyrenylene phenylene, perylene, pentaphenylene, hexaphenylene, pentaphenylene, thienylene, furylene, carbazolylene, indolylene, isoindolylene, benzofurylene, benzothiophenylene, dibenzofurylene, dibenzothiophenylene, benzocarbazolylene, dibenzocarbazolylene, dibenzothiophenylene, pyridylene, imidazolylene, pyrazolylene, thiazolylene, isothiazolylene, oxazolylene, isoxazolylene, thiadiazolylene, oxadiazolylene, pyrazinylene, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl, but exemplary embodiments are not limited thereto.

[0508] In one or more exemplary embodiments, xe1 in Formula 601 and xe611 to xe613 in Formula 601-1 may each independently be 0, 1, or 2.

[0509] In one or more exemplary embodiments, R in Equation 601 601 and R in formula 601-1 611 to R 613 Can be independently selected from:

[0510] Phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl , pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl;

[0511] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 20 Alkyl, C1-C 20 Alkoxy, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothienyl, dibenzofuranyl, dibenzothienyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalide at least one selected from the group consisting of oxazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl and azacarbazolyl, phenyl, biphenyl, terphenyl, naphthyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, phenyl, peryl, pentaphenyl, hexaphenyl, pentacene, thienyl, furyl, carbazolyl, indolyl, isoindolyl, benzofuranyl, benzothiophenyl, dibenzofuranyl, dibenzothiophenyl, benzocarbazolyl, dibenzocarbazolyl, dibenzothiophenyl, pyridyl, imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, thiadiazolyl, oxadiazolyl, pyrazinyl, pyrimidinyl, pyridazinyl, triazinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl; and

[0512] -S(=O)2(Q 601 ) and -P(=O)(Q 601 )(Q 602 ),

[0513] Among them, Q 601 and Q 602 Same as described above.

[0514] The electron transport region 180 may include at least one compound selected from compound ET1 to compound ET36, but exemplary embodiments are not limited thereto:

[0515]

[0516]

[0517]

[0518]

[0519] In one or more exemplary embodiments, the electron transport region 180 may include at least one compound selected from 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 4,7-diphenyl-1,10-phenanthroline (Bphen), tris(8-hydroxyquinolinolato)aluminum (Alq3), bis(8-hydroxy-2-methylquinolinolato)-(4-phenylphenoxy)aluminum (BAlq), 3-(biphenyl-4-yl)-5-(4-tert-butylphenyl)-4-phenyl-4H-1,2,4-triazole (TAZ), 4-naphthalene-1-yl-3,5-diphenyl-1,2,4-triazole (NTAZ), and diphenyl(4-(triphenylsilyl)phenyl)phosphine oxide (TSPO1):

[0520]

[0521] The thickness of the buffer layer 182, the hole blocking layer 184, and the electron control layer 186 can each be independently about to approximately (For example, approximately to approximately When the thicknesses of the buffer layer 182, the hole blocking layer 184, and the electron control layer 186 are within these ranges, excellent hole blocking characteristics or excellent electron control characteristics may be obtained without significantly increasing the driving voltage.

[0522] The thickness of the electron transport region 180 may be about to approximately (For example, approximately to approximately When the thickness of the electron transport region 180 is within the range described above, the electron transport region 180 may have satisfactory electron transport characteristics without significantly increasing the driving voltage.

[0523] In addition to the materials described above, the electron transport region 180 (eg, the electron transport layer 188 in the electron transport region 180 ) may further include a metal-containing material.

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

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

[0526]

[0527] The electron transport region 180 may include an electron injection layer 194 that facilitates injection of electrons from the second electrode 200. The electron injection layer 194 may directly contact the second electrode 200.

[0528] The electron injection layer 194 may have: i) a single-layer structure including a single layer containing a single material; ii) a single-layer structure including a single layer containing a plurality of different materials; or iii) a multi-layer structure having a plurality of layers including a plurality of different materials.

[0529] The electron injection layer 194 may include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof.

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

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

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

[0533] The alkali metal 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.

[0534] The alkali metal compound 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 an exemplary embodiment, the alkali metal compound may be selected from LiF, Li2O, NaF, LiI, NaI, CsI, and KI, but the exemplary embodiments are not limited thereto.

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

[0536] The rare earth metal compound may be selected from YbF3, ScF3, Sc2O3, Y2O3, Ce2O3, GdF3, and TbF3. In an exemplary embodiment, the rare earth metal compound may be selected from YbF3, ScF3, TbF3, YbI3, ScI3, and TbI3, but the exemplary embodiments are not limited thereto.

[0537] The alkali metal complex, alkaline earth metal complex and rare earth metal complex may include ions of alkali metal, alkaline earth metal and rare earth metal as described above, and the ligand coordinated with the metal ion of the alkali metal complex, the metal ion of the alkaline earth metal complex or the metal ion of the rare earth metal complex may be selected from hydroxyquinoline, hydroxyisoquinoline, hydroxybenzoquinoline, hydroxyacridine, hydroxyphenanthridine, hydroxyphenyloxazole, hydroxyphenylthiazole, hydroxyphenyloxadiazole, hydroxyphenylthiadiazole, hydroxyphenylpyridine, hydroxyphenylbenzimidazole, hydroxyphenylbenzothiazole, bipyridine, phenanthroline and cyclopentadiene, but exemplary embodiments are not limited thereto.

[0538] The electron injection layer 194 may be composed of an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof as described above (or include an alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof as described above). In one or more exemplary embodiments, the electron injection layer 194 may also include an organic material. When the electron injection layer 194 also includes an organic material, the alkali metal, an alkaline earth metal, a rare earth metal, an alkali metal compound, an alkaline earth metal compound, a rare earth metal compound, an alkali metal complex, an alkaline earth metal complex, a rare earth metal complex, or any combination thereof may be uniformly or non-uniformly dispersed in a matrix including an organic material.

[0539] The thickness of the electron injection layer 194 can be about to approximately (For example, approximately to approximately When the thickness of the electron injection layer 194 is within the range described above, the electron injection layer 194 may have satisfactory electron injection characteristics without significantly increasing the driving voltage.

[0540] Second electrode 200

[0541] The second electrode 200 may be located on the organic layer 150 having such a structure. The second electrode 200 may be a cathode serving as an electron injection electrode. In this regard, a material for forming the second electrode 200 may be selected from metals, alloys, conductive compounds, and combinations thereof having a relatively low work function.

[0542] The second electrode 200 may include at least one selected from lithium (Li), silver (Ag), magnesium (Mg), aluminum (Al), aluminum-lithium (Al-Li), calcium (Ca), magnesium-indium (Mg-In), magnesium-silver (Mg-Ag), ITO, and IZO, but the exemplary embodiment is not limited thereto. The second electrode 200 may be a transmissive electrode, a semi-transmissive electrode, or a reflective electrode.

[0543] The second electrode 200 may have a single-layer structure or a multi-layer structure including two or more layers.

[0544] Figures 2 to 4 Description

[0545] Figure 2 is a schematic cross-sectional view of another exemplary embodiment of an organic light emitting device constructed according to the principles of the invention. Figure 3 is a schematic cross-sectional view of yet another exemplary embodiment of an organic light emitting device constructed according to the principles of the invention. Figure 4 is a schematic cross-sectional view of yet another exemplary embodiment of an organic light emitting device constructed according to the principles of the invention.

[0546] Reference Figure 2 , the organic light emitting device 20 includes a first capping layer 210, a first electrode 110, an organic layer 150, and a second electrode 200 sequentially stacked in the order stated. Figure 3 , the organic light emitting device 30 includes a first electrode 110, an organic layer 150, a second electrode 200, and a second capping layer 220 sequentially stacked in the order stated. Figure 4 , the organic light emitting device 40 includes a first capping layer 210 , a first electrode 110 , an organic layer 150 , a second electrode 200 , and a second capping layer 220 , which are sequentially stacked in the stated order.

[0547] about Figures 2 to 4 , the first electrode 110, the organic layer 150 and the second electrode 200 can be combined by referring to Figures 1A to 1E Understand the description given.

[0548] In the organic layer 150 of each of the organic light-emitting devices 20 and 40, light generated in the emission region 160 may pass through the first electrode 110 and the first capping layer 210 toward the outside, wherein the first electrode 110 may be a semi-transmissive electrode or a transmissive electrode. In the organic layer 150 of each of the organic light-emitting devices 30 and 40, light generated in the emission region 160 may pass through the second electrode 200 and the second capping layer 220 toward the outside, wherein the second electrode 200 may be a semi-transmissive electrode or a transmissive electrode.

[0549] The first capping layer 210 and the second capping layer 220 may improve external light emitting efficiency according to the principle of constructive interference.

[0550] The first capping layer 210 and the second capping layer 220 may each independently be an organic capping layer including an organic material, an inorganic capping layer including an inorganic material, or a composite capping layer including an organic material and an inorganic material.

[0551] At least one selected from the first capping layer 210 and the second capping layer 220 may each independently include at least one material selected from carbocyclic compounds, heterocyclic compounds, amine compounds, porphyrin derivatives, phthalocyanine derivatives, naphthalocyanine derivatives, alkali metal complexes, and alkaline earth metal complexes. The carbocyclic compounds, heterocyclic compounds, and amine compounds may optionally be substituted with a substituent containing at least one element selected from O, N, S, Se, Si, F, Cl, Br, and I. In one exemplary embodiment, at least one selected from the first capping layer 210 and the second capping layer 220 may each independently include an amine compound.

[0552] In one exemplary embodiment, at least one selected from the first capping layer 210 and the second capping layer 220 may each independently include the compound represented by Formula 201 or the compound represented by Formula 202.

[0553] In one or more exemplary embodiments, at least one selected from the first capping layer 210 and the second capping layer 220 may each independently include a compound selected from Compound HT28 to Compound HT33 and Compound CP1 to Compound CP5, but exemplary embodiments are not limited thereto.

[0554]

[0555] In the above, it has been combined Figures 1A to 4 The organic light emitting device according to the embodiment is described, but exemplary embodiments are not limited thereto.

[0556] The layers constituting the hole transport region 140, the emission region 160, and the electron transport region 180 may be formed in specific regions by using one or more suitable methods selected from vacuum deposition, spin coating, casting, Langmuir-Blodgett (LB) deposition, inkjet printing, laser printing, and laser induced thermal imaging.

[0557] When the layers constituting the hole transport region 140, the emission region 160, and the electron transport region 180 are formed by vacuum deposition, the deposition temperature may be between about 100° C. and about 500° C., and the deposition temperature may be between about 100° C. and about 100° C., by considering the materials to be included in the layers and the structures of the layers to be formed. -8 Up to about 10 -3 Torr vacuum and approx. / second to approximately Vacuum deposition was performed at a deposition rate of 1000 Å / s.

[0558] When the layers constituting the hole transport region 140, the emission region 160, and the electron transport region 180 are formed by spin coating, the spin coating may be performed at a coating speed of about 2000 rpm to about 5000 rpm and at a heat treatment temperature of about 80°C to about 200°C by considering the materials to be included in the layer to be formed and the structure of the layer to be formed.

[0559] equipment

[0560] Figure 5 is a schematic diagram of an exemplary embodiment of an apparatus incorporating an organic light emitting device constructed according to the principles of the invention.

[0561] Reference Figure 5 , the device 300 includes a thin film transistor 310 having a source electrode 320, a drain electrode 340, and an active layer 330. In the illustrated embodiment, the first electrode 110 of the organic light-emitting device 10 is electrically connected to one of the source electrode 320 and the drain electrode 340. In other exemplary embodiments, other organic light-emitting devices such as the organic light-emitting device 20, the organic light-emitting device 30, and / or the organic light-emitting device 40 may be used instead of the organic light-emitting device 10.

[0562] Organic light emitting devices can be included in a variety of devices.

[0563] The thin film transistor 310 may further include a gate electrode, a gate insulating layer, and the like.

[0564] The active layer 330 may include crystalline silicon, amorphous silicon, an organic semiconductor, an oxide semiconductor, or the like, but exemplary embodiments are not limited thereto.

[0565] The device 300 may further include a sealing portion for sealing the organic light-emitting device 10. The sealing portion may allow an image to be transmitted from the organic light-emitting device 10 and may prevent external air and moisture from penetrating into the organic light-emitting device 10. The sealing portion may be a sealing substrate including a transparent glass or plastic substrate. The sealing portion may be a thin-film encapsulation layer including multiple organic layers and / or multiple inorganic layers. When the sealing portion is a thin-film encapsulation layer, the entire device may be flexible.

[0566] For example, the device 300 may be a lighting device, an authentication device, or an electronic device.

[0567] The light emitting device can be used as various displays, light sources, etc.

[0568] The authentication device may be, for example, a biometric authentication device for authenticating an individual by using biometric information of a living body, such as a fingertip, a pupil, etc. The authentication device may further include a biometric information collector in addition to the organic light emitting device.

[0569] The electronic device can be applied to personal computers (e.g., mobile personal computers), mobile phones, digital cameras, electronic notepads, electronic dictionaries, electronic game consoles, medical equipment (e.g., electronic thermometers, blood pressure monitors, blood glucose meters, pulse measuring devices, pulse wave measuring devices, electrocardiogram (ECG) displays, ultrasonic diagnostic devices, or endoscope displays), fish finders, various measuring instruments, meters (e.g., meters for vehicles, aircraft, and ships), projectors, etc., but exemplary embodiments are not limited thereto.

[0570] General Definition of Substituents

[0571] As used herein, the term "π-electron-poor nitrogen-containing cyclic group" refers to a cyclic group having at least one *-N=*' moiety, non-limiting examples of which include imidazolyl, pyrazolyl, thiazolyl, isothiazolyl, oxazolyl, isoxazolyl, pyridinyl, pyrazinyl, pyridazinyl, pyrimidinyl, indazolyl, purinyl, quinolyl, isoquinolyl, benzoquinolyl, phthalazinyl, naphthyridinyl, quinoxalinyl, quinazolinyl, cinnolinyl, phenanthridinyl, acridinyl, phenanthrolinyl, phenazinyl, benzimidazolyl, isobenzothiazolyl, benzoxazolyl, isobenzoxazolyl, triazolyl, tetrazolyl, oxadiazolyl, triazinyl, thiadiazolyl, imidazopyridinyl, imidazopyrimidinyl, and azacarbazolyl.

[0572] The π-electron-poor nitrogen-free cyclic group may be: i) a 5- to 7-membered cyclic group or heterocyclic group having no *-N=*' moiety; ii) a polycyclic group or heteropolycyclic group in which two or more of the 5- to 7-membered cyclic groups or heterocyclic groups having no *-N=*' moiety are condensed with each other; or iii) a 5- to 7-membered monocyclic group or heteromonocyclic group in which at least one of the 5- to 7-membered monocyclic group or heteromonocyclic group having no *-N=*' moiety is condensed with at least one C5-C 60 A polycyclic or heterocyclic group condensed with a carbocyclic group. For example, the π-electron-poor nitrogen-free ring group can be selected from phenyl, heptalenyl, indenyl, naphthyl, azulenyl, indacenyl, acenaphthenyl, fluorenyl, spirobifluorenyl, benzofluorenyl, dibenzofluorenyl, phenanthrenyl, phenanthrenyl, anthracenyl, fluoranthenyl, benzo[9,10]phenanthrenyl, pyrenyl, The present invention also includes but is not limited to benzophenone, benzothiophene, benzofuryl, benzothiophene, benzocarbazolyl, dibenzocarbazolyl, dibenzofuryl, dibenzothiophene, dibenzothiophene sulfone, carbazolyl, dibenzothiophene, indenocarbazolyl, indolocarbazolyl, benzofuranocarbazolyl, benzothiophenocarbazolyl, thienodicarbazolyl, triindolophenyl, and groups represented by Formula 13-1 and Formula 13-2, but exemplary embodiments are not limited thereto.

[0573] As used herein, the term "transition metals of the first period of the periodic table" refers to elements of the d-block of period 4 of the periodic table, non-limiting examples of which include scandium (Sc), titanium (Ti), vanadium (V), chromium (Cr), manganese (Mn), iron (Fe), cobalt (Co), nickel (Ni), copper (Cu), and zinc (Zn).

[0574] As used herein, the term "transition metals of the second period of the periodic table" refers to elements of the d-block of period 5 of the periodic table, non-limiting examples of which include yttrium (Y), zirconium (Zr), niobium (Nb), molybdenum (Mo), technetium (Tc), ruthenium (Ru), rhodium (Rh), palladium (Pd), silver (Ag), and cadmium (Cd).

[0575] As used herein, the term "transition metals of the third period of the periodic table" refers to elements of the d-block and f-block of period 6 of the periodic table, non-limiting examples of which include lanthanum (La), samarium (Sm), europium (Eu), terbium (Tb), thulium (Tm), ytterbium (Yb), lutetium (Lu), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir), platinum (Pr), gold (Au), and mercury (Hg).

[0576] As used herein, the term "C1-C 60 "Alkyl" refers to a linear or branched aliphatic saturated hydrocarbon monovalent group having 1 to 60 carbon atoms, examples of which include methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl and hexyl. As used herein, the term "C1-C 60 "Alkylene" refers to a group having a C1-C 60 Alkyl corresponds to a divalent group of the structure.

[0577] As used herein, the term "C2-C 60 "Alkenyl" refers to a C2-C 60 The term "C2-C4" as used herein refers to a hydrocarbon group having at least one carbon-carbon double bond in the middle or at the end of the alkyl group, examples of which include vinyl, propenyl, and butenyl. 60 "Alkenylene" refers to a group having a C2-C 60 Alkenyl corresponds to a divalent group of the structure.

[0578] As used herein, the term "C2-C 60 "Alkynyl" refers to a C2-C 60 The term "C2-C4" as used herein is a hydrocarbon group having at least one carbon-carbon triple bond in the middle or at the end of the alkyl group, examples of which include ethynyl and propynyl. 60 "Alkyne" refers to a group having a C2-C 60 Alkynyl corresponds to a divalent group of the structure.

[0579] As used herein, the term "C1-C 60 "Alkoxy" refers to 101 (Among them, A 101 C1-C 60 The monovalent group represented by an alkyl group is exemplified by a methoxy group, an ethoxy group, and an isopropoxy group.

[0580] As used herein, the term "C3-C 10 "Cycloalkyl" refers to a monovalent saturated hydrocarbon monocyclic group having 3 to 10 carbon atoms, examples of which include cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl and cycloheptyl. As used herein, the term "C3-C 10 "Cycloalkylene" refers to a group having a C3-C 10 Cycloalkyl corresponds to a divalent group of the structure.

[0581] As used herein, the term "C1-C 10 "Heterocycloalkyl" refers to a monovalent saturated monocyclic group having at least one heteroatom selected from N, O, Si, P and S as a ring atom and 1 to 10 carbon atoms, examples of which include 1,2,3,4-oxatriazolidinyl, tetrahydrofuranyl and tetrahydrothienyl. As used herein, the term "C1-C 10 "Heterocycloalkylene" refers to a group having a C1-C 10 Heterocycloalkyl corresponds to a divalent group of the structure.

[0582] The term "C3-C 10 "Cycloalkenyl" refers to a monovalent monocyclic group having 3 to 10 carbon atoms and at least one carbon-carbon double bond in its ring and not having aromaticity, examples of which include cyclopentenyl, cyclohexenyl and cycloheptenyl. As used herein, the term "C3-C 10 "Cycloalkenylene" refers to a group having a C3-C 10 Cycloalkenyl corresponds to a divalent group of the structure.

[0583] As used herein, the term "C1-C 10 The term "heterocycloalkenyl" refers to a monovalent monocyclic group having at least one heteroatom selected from N, O, Si, P and S as a ring atom, 1 to 10 carbon atoms and at least one double bond in its ring. 10 Examples of heterocycloalkenyl groups include 4,5-dihydro-1,2,3,4-oxatriazolyl, 2,3-dihydrofuranyl, and 2,3-dihydrothienyl. As used herein, the term "C1-C 10 "Heterocycloalkenylene" refers to a group having a C1-C 10 Heterocycloalkenyl corresponds to a divalent group of the structure.

[0584] As used herein, the term "C6-C 60 "Aryl" refers to a monovalent group having a carbocyclic aromatic system containing 6 to 60 carbon atoms. The term "C6-C 60 "Arylene" refers to a divalent group having a carbocyclic aromatic system containing 6 to 60 carbon atoms. 60 Examples of aryl groups include phenyl, naphthyl, anthracenyl, phenanthrenyl, pyrenyl, and When C6-C 60 Aryl and C6-C 60 When the arylene groups each include two or more rings, the two or more rings may be condensed with each other.

[0585] As used herein, the term "C1-C 60 "Heteroaryl" refers to a monovalent group having a heterocyclic aromatic system having at least one heteroatom selected from N, O, Si, P and S as a ring atom in addition to 1 to 60 carbon atoms. As used herein, the term "C1-C 60 "Heteroarylene" refers to a divalent group having a heterocyclic aromatic system having at least one heteroatom selected from N, O, Si, P and S as a ring atom in addition to 1 to 60 carbon atoms. 60 Examples of heteroaryl groups include pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, quinolinyl, and isoquinolinyl. 60 Heteroaryl and C1-C 60 When each heteroarylene group includes two or more rings, the two or more rings may be condensed with each other.

[0586] As used herein, the term "C6-C 60 "Aryloxy" refers to -OA 102 (Among them, A 102 C6-C 60 Aryl), the term "C6-C 60 "Arylthio" refers to -SA 103 (Among them, A 103 C6-C 60 aryl).

[0587] As used herein, the term "C1-C 60 "Heteroaryloxy" refers to -OA 104 (Among them, A 104 C1-C 60 heteroaryl), the term "C1-C 60 "Heteroarylthio" refers to -SA 105 (Among them, A 105 C1-C 60 heteroaryl).

[0588] As used herein, the term "monovalent non-aromatic condensed polycyclic group" refers to a monovalent group having two or more rings condensed with each other, having only carbon atoms (e.g., having 8 to 60 carbon atoms) as ring atoms, and having no aromaticity in its entire molecular structure. A detailed example of a monovalent non-aromatic condensed polycyclic group is a fluorenyl group. As used herein, the term "divalent non-aromatic condensed polycyclic group" refers to a divalent group having a structure corresponding to a monovalent non-aromatic condensed polycyclic group.

[0589] As used herein, the term "monovalent non-aromatic condensed heteropolycyclic group" refers to a monovalent group having two or more rings condensed with each other, at least one heteroatom selected from N, O, Si, P, and S as a ring-forming atom other than carbon atoms (e.g., having 1 to 60 carbon atoms), and having no aromaticity in its entire molecular structure. A detailed example of a monovalent non-aromatic condensed heteropolycyclic group is a carbazolyl group. As used herein, the term "divalent non-aromatic condensed heteropolycyclic group" refers to a divalent group having a structure corresponding to a monovalent non-aromatic condensed heteropolycyclic group.

[0590] As used herein, the term "C5-C 60 "Carbocyclic group" refers to a monocyclic or polycyclic group consisting of 5 to 60 carbon atoms and including only carbon atoms as ring atoms. 60 The carbocyclic group may be an aromatic carbocyclic group or a non-aromatic carbocyclic group. 60 The carbocyclic group can be a ring (such as benzene), a monovalent group (such as phenyl) or a divalent group (such as phenylene). In one or more exemplary embodiments, the carbonyl group is connected to a C5-C 60 The number of substituents of the carbocyclic group, C5-C 60 The carbocyclic group may be a trivalent group or a tetravalent group.

[0591] As used herein, the term "C1-C 60 "Heterocyclic group" refers to a group having C5-C 60 The carbocyclic group corresponds to the structure of the group.

[0592] As used herein, the substituted C5-C 60 Carbocyclic, substituted C1-C 60 Heterocyclic, substituted C1-C 20 Alkylene, substituted C2-C 20 Alkenylene, substituted C3-C 10 Cycloalkylene, substituted C1-C 10 Heterocycloalkylene, substituted C3-C 10 Cycloalkenylene, substituted C1-C 10 Heterocycloalkenylene, substituted C6-C 60 Arylene, substituted C1-C 60 Heteroarylene, substituted divalent non-aromatic condensed polycyclic group, substituted divalent non-aromatic condensed heteropolycyclic group, substituted C1-C 60 Alkyl, substituted C2-C 60 Alkenyl, substituted C2-C 60 Alkynyl, substituted C1-C 60 Alkoxy, substituted C3-C 10 Cycloalkyl, substituted C1-C 10 Heterocycloalkyl, substituted C3-C 10 Cycloalkenyl, substituted C1-C 10 Heterocycloalkenyl, substituted C6-C 60 Aryl, substituted C6-C 60 Aryloxy, substituted C6-C 60 Arylthio, substituted C1-C 60 Heteroaryl, substituted C1-C 60 Heteroaryloxy, substituted C1-C 60 At least one substituent selected from the group consisting of the heteroarylthio group, the substituted monovalent non-aromatic condensed polycyclic group and the substituted monovalent non-aromatic condensed heteropolycyclic group may be selected from the group consisting of:

[0593] Deuterium (-D), -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0594] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) selected from at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy;

[0595] C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups;

[0596] are substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) selected from at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and

[0597] -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 ),

[0598] Among them, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 can be independently selected from hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 heteroarylthio group, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, C1-C ... 60 Alkyl, C6-C8 substituted with at least one selected from deuterium, -F and cyano 60 Aryl, biphenyl and terphenyl.

[0599] As used herein, the term "Ph" refers to a phenyl group, as used herein, the term "Me" refers to a methyl group, as used herein, the term "Et" refers to an ethyl group, as used herein, the term "tert-Bu" or "Bu" refers to a phenyl group. t ” refers to tert-butyl, and the term “OMe” as used herein refers to methoxy.

[0600] As used herein, the term "biphenyl" refers to a "phenyl group substituted with a phenyl group." In other words, a "biphenyl group" is a group having C6-C 60 A phenyl group substituted with an aryl group as a substituent.

[0601] As used herein, the term "terphenyl" refers to a "phenyl group substituted with a biphenyl group". In other words, a "terphenyl group" is a group having a C6-C 60 C6-C 60 A phenyl group substituted with an aryl group as a substituent.

[0602] The terms "hydrogen" and "deuterium" refer to their respective atoms and the corresponding atomic radicals, and the terms "-F, -Cl, -Br and -I" refer to the atomic radicals of fluorine, chlorine, bromine and iodine, respectively.

[0603] As used herein, the term "atom" may refer to an element or its corresponding group of atoms bonded to one or more other atoms.

[0604] As used herein, a substituent of a monovalent group (eg, alkyl) may also independently be a substituent of a corresponding divalent group (eg, alkylene).

[0605] Unless otherwise defined, * and *' as used herein refer to the binding sites to adjacent atoms in the corresponding formula.

[0606] Hereinafter, the phrase "using B instead of A" used in the description examples means that the same molar equivalent of B is used instead of A.

[0607] Example

[0608] Example 1

[0609] As the anode, an ITO substrate was cut into a size of 50 mm × 50 mm × 0.5 mm, ultrasonically treated with acetone, isopropyl alcohol, and pure water for 15 minutes each, and then cleaned by exposure to ultraviolet light and ozone for 30 minutes. The ITO substrate was then provided to a vacuum deposition device.

[0610] Compound HT1 was vacuum deposited on an ITO substrate to form a hole injection layer having a thickness of 120 nm, compound 1-3 was vacuum deposited on the hole injection layer to form a hole transport layer having a thickness of 5 nm, compound 1-3 was vacuum deposited on the hole transport layer to form an intermediate layer having a thickness of 5 nm, and compound 1-3, compound 2-16, compound 3-11 and compound 4-1 were co-deposited on the intermediate layer at a weight ratio of 62.6:26.9:10:0.5 to form an emission layer having a thickness of 30 nm. Compound ET1 was vacuum deposited on the emission layer to form a first electron transport layer having a thickness of 5 nm, and compound ET2 and LiQ were co-deposited on the first electron transport layer at a weight ratio of 5:5 to form a second electron transport layer having a thickness of 20 nm. Yb was vacuum deposited on the second electron transport layer to form an electron injection layer having a thickness of 1 nm. Mg and Ag were co-deposited on the electron injection layer at a weight ratio of 5:5 to form a cathode having a thickness of 10 nm, thereby completing the manufacture of an organic light emitting device.

[0611]

[0612] Example 2

[0613] An organic light emitting device was manufactured in the same manner as in Example 1, except that Compound 2-16 was deposited on the emission layer to form an intermediate layer having a thickness of 5 nm instead of forming the intermediate layer on the hole transport layer.

[0614] Example 3

[0615] An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 1-3, Compound 2-16, Compound 3-11 and Compound 4-1 were co-deposited on the hole transport layer in a weight ratio of 62.6:26.9:10:0.5 to form a first emission layer having a thickness of 13 nm, instead of forming an intermediate layer on the hole transport layer, Compound 1-3 was vacuum-deposited on the first emission layer to form an intermediate layer having a thickness of 4 nm, and Compound 1-3, Compound 2-16, Compound 3-11 and Compound 4-1 were co-deposited on the intermediate layer in a weight ratio of 62.6:26.9:10:0.5 to form a second emission layer having a thickness of 13 nm.

[0616] Example 4

[0617] An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 4-12 was used instead of Compound 1-3 when forming the intermediate layer.

[0618] Example 5

[0619] An organic light-emitting device was manufactured in the same manner as in Example 2, except that Compound 4-12 was used instead of Compound 2-16 when forming the intermediate layer.

[0620] Example 6

[0621] An organic light-emitting device was manufactured in the same manner as in Example 3, except that Compound 4-12 was used instead of Compound 1-3 when forming the intermediate layer.

[0622] Comparative Example 1

[0623] An organic light emitting device was manufactured in the same manner as in Example 1, except that the intermediate layer was not formed.

[0624] Comparative Example 2

[0625] An organic light-emitting device was manufactured in the same manner as in Example 3, except that 2-methyl-9,10-di(2-naphthyl)anthracene (MADN), a TADF dopant (2-(4-(11,11-dimethylindeno[1,2-b]carbazole-5(11H)-yl)phenyl)benzo[d]thiazole) and a fluorescent dopant (2,6,8,11-tetra-tert-butylperylene) were co-deposited on the first emission layer in a weight ratio of 70:27:3 to form an intermediate layer having a thickness of 20 nm, instead of forming the intermediate layer of Example 3.

[0626] MADN: HOMO-5.9eV, LUMO-2.56eV, E S1 -3.34eV,E T1 -2.52eV

[0627] TADF dopant: HOMO-5.7eV, LUMO-2.99eV, E S1 -2.71eV,E T1 -2.66eV

[0628] Fluorescent dopant: HOMO 5.44eV, LUMO 2.74eV, E S1 -2.7eV,E T1 -2.6eV,FWHM30nm.

[0629] Comparative Example 3

[0630] An organic light-emitting device was manufactured in the same manner as in Example 1, except that Compound 2-16 was deposited on the emission layer to form an intermediate layer having a thickness of 5 nm instead of forming the intermediate layer on the hole transport layer, and the first electron transport layer and the second electron transport layer were not formed on the intermediate layer.

[0631] Comparative Example 4

[0632] An organic light-emitting device was manufactured in the same manner as in Example 1, except that compound 2-16 was deposited on the emission layer to form an intermediate layer having a thickness of 5 nm instead of forming the intermediate layer on the hole transport layer, and when forming the emission layer, compound 1-3, compound 2-16 and compound 3-11 were co-deposited on the hole transport layer in a weight ratio of 63:27:10 to form an emission layer having a thickness of 30 nm.

[0633] Evaluation Example 1

[0634] The luminance was measured at 10 mA / cm by using a source measure unit sold under the trade name Keithley SMU236 by Tektronix, Inc. of Beaverton, Oregon, and a luminance meter sold under the trade name PR650 by Konica Minolta Co., Ltd. of Tokyo, Japan. 2 The lifetime and driving voltage of the organic light-emitting devices manufactured according to Examples 1 to 6 and Comparative Examples 1 to 4 were measured at a current density of 100 Å, and the results are shown in Table 1. The lifetime represents the amount of time that elapses when the luminance is 90% of the initial luminance (100%). The lifetime was measured based on Comparative Example 1 as 100%.

[0635] Table 1

[0636] life Driving voltage Comparative Example 1 100％ 5.0V Comparative Example 2 95％ 5.2V Comparative Example 3 105％ 4.8V Comparative Example 4 110％ 5.1V Example 1 120％ 4.7V Example 2 135％ 4.5V Example 3 130％ 4.5V Example 4 120％ 5.2V Example 5 130％ 5.3V Example 6 125％ 5.0V

[0637] Referring to Table 1, it is confirmed that the organic light-emitting devices manufactured according to Examples 1 to 6 have unexpectedly and significantly improved lifespans compared to the organic light-emitting devices manufactured according to Comparative Examples 1 to 4, and the organic light-emitting devices manufactured according to Examples 1 to 3 have lower driving voltages compared to the organic light-emitting devices manufactured according to Comparative Examples 1 to 4.

[0638] According to the principles and exemplary embodiments of the invention, when an organic light-emitting device includes an intermediate layer located between an emission layer and an electron transport region or between an emission layer and a hole transport region, or includes an intermediate layer located in the emission layer, the organic light-emitting device can have a significantly and unexpectedly improved lifetime by controlling the concentration and distribution of excitons in the emission layer.

[0639] Although certain exemplary embodiments and implementations have been described herein, other embodiments and modifications will be apparent from this description. Accordingly, the inventive concept is not limited to such embodiments, but rather to the broader scope of the appended claims and various obvious modifications and equivalent arrangements that will be apparent to those skilled in the art. < / hat-cn>

Claims

1. An organic light-emitting device, comprising: a first electrode; a second electrode facing the first electrode; as well as an organic layer disposed between the first electrode and the second electrode, The organic layer further includes an emission region, a first region disposed between the first electrode and the emission region, and a second region disposed between the emission region and the second electrode. the second region includes a first layer and a second layer both containing an organic compound, The emission region includes a first compound, a second compound, a third compound and a fourth compound, The first compound is a hole transport host compound, The second compound is an electron transport host compound or a bipolar host compound, The third compound is a thermally activated delayed fluorescent compound or an organic metal complex that satisfies the following formula 1: The fourth compound is a fluorescent dopant, and At least one intermediate layer is disposed between the first region and the emitting region and includes the first compound, the fourth compound, or a combination thereof, or At least one intermediate layer is disposed between the second region and the emitting region and includes the second compound, the fourth compound, or a combination thereof: <Formula 1> △E ST (C3)≤0.3eV In formula 1, △E ST (C3) is the difference between the lowest excited singlet energy level and the lowest excited triplet energy level of the third compound.

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

3. The organic light-emitting device according to claim 1, wherein The intermediate layer is in direct contact with the emission region. The organic light-emitting device according to claim 1 , wherein: The first compound, the second compound, and the third compound are different from each other. The organic light-emitting device according to claim 1 , wherein: An interval between a maximum peak wavelength of an absorption spectrum of the fourth compound and a maximum peak wavelength of an emission spectrum of the fourth compound is 35 nm or less. The organic light-emitting device according to claim 1 , wherein: A concentration of the fourth compound in the emission region is 1 / 3 or less of a concentration of the third compound.

7. The organic light-emitting device according to claim 1, wherein The first layer and the second layer include a fifth compound and a sixth compound, respectively, The fifth compound is different from the first compound, the second compound, and the fourth compound, and The sixth compound is different from the first compound, the second compound, and the fourth compound.

8. The organic light emitting device according to claim 1, wherein The first compound is a compound represented by Formula 1: <Formula 1> In formula 1, X 11 O, S, N (R 19 ) or C(R 19 )(R 20 ), R 11 to R 20 Are independent of each other as: *-(L 11 ) a11 -A 11 , hydrogen, deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring group, -C(Q1)(Q2)(Q3), -Si(Q1)(Q2)(Q3), -B(Q1)(Q2) or -N(Q1)(Q2); Substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one of A π-electron-poor nitrogen-free ring group substituted with at least one of the following groups: independently substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is a π-electron-poor nitrogen-free ring group of at least one of L 11 for: a π-electron-poor nitrogen-free ring group, -C(Q1)(Q2)-, -Si(Q1)(Q2)-, -B(Q1)-, or -N(Q1)-; and Substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one of a11 is 1, 2, or 3, A 11 for: π-electron-poor nitrogen-free ring groups; Substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one of A π-electron-poor nitrogen-free ring group substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) is a π-electron-poor nitrogen-free ring group of at least one of R 11 to R 20 Any two or more groups thereof are optionally linked to each other to form: a nitrogen-free π-electron-poor ring group; or a ring group substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-free ring, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) is a π-electron-poor nitrogen-free ring group of at least one of Among them, Q1 to Q3, Q 21 To Q 23 and Q 31 To Q 33 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, or a terphenyl group.

9. The organic light-emitting device according to claim 8, wherein A 11 for: are independently optionally substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 31 )(Q 32 )(Q 33 )、-Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) and -N(Q 31 )(Q 32 ) of at least one of phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl-1-piperidinyl, ... phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-C 1-D ... 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -C(Q 21 )(Q 22 )(Q 23 )、-Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) of at least one of phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl and dinaphthothiophenyl, Among them, Q 21 To Q 23 and Q 31 To Q 33 has the meaning given in claim 8.

10. The organic light emitting device according to claim 1, wherein The electron transport host compound includes an electron withdrawing group, and The bipolar host compound includes an electron-withdrawing group and an electron-donating group. The organic light-emitting device according to claim 1 , wherein: The second compound is a compound represented by one of Formula 2-1 and Formula 2-2: <Formula 2-1> <Formula 2A> <Formula 2-2> Among them, in Formula 2-1, Formula 2A and Formula 2-2, Y1 is a single bond, -O-, -S-, -C(R 24 )(R 25 )-、-N(R 24 )-、-Si(R 24 )(R 25 )-、-C(=O)-、 -S(=O)2-、-B(R 24 )-、-P(R 24 )-or-P(=O)(R 24 )-, k1 is 0 or 1, CY 21 and CY 22 are independently C5-C 60 Carbocyclic or C1-C 60 heterocyclic group, L 21 To L 27 are independently substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 a heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, or a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, Ar 21 to Ar 27 are independently a group represented by formula 2A, a substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C1-C 60 heteroaryl, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, or a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, Ar 21 to Ar 23 At least one of them is a group represented by Formula 2A, a21 to a27 are each independently 0, 1, 2 or 3, b21 to b27 are each independently 1, 2, 3, 4, 5, 6, 7 or 8, c21 and c22 are each independently an integer from 1 to 20, c23 is an integer from 1 to 5, n21 and n22 are each independently an integer from 1 to 8, X 21 To X 23 are independently C or N, When X 21 To X 23 When each of the 21 to R 23 At least one of them is independently -F, cyano or a C1-C1-substituted group having at least one of -F and cyano 60 alkyl, X 24 To X 26 are independently C(R 26 ) or N, X 24 To X 26 At least one of them is N, R 21 to R 26 are independently *-(L 27 ) a27 -(Ar 27 ) b27 , hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 Heteroaryl, substituted or unsubstituted C1-C 60 Heteroaryloxy, substituted or unsubstituted C1-C 60 heteroarylthio group, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q1)(Q2)(Q3), -N(Q1)(Q2), -B(Q1)(Q2), -C(=O)(Q1), -S(=O)2(Q1) or -P(=O)(Q1)(Q2), Ar 21 to Ar 27 and R 21 to R 26 Any two or more groups therein may be optionally linked to each other to form a substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group, The substituted C5-C 60 Carbocyclic group, the substituted C1-C 60 Heterocyclic group, the substituted C1-C 60 Alkyl, the substituted C2-C 60 Alkenyl, the substituted C2-C 60 Alkynyl, the substituted C1-C 60 Alkoxy, the substituted C3-C 10 Cycloalkyl, the substituted C1-C 10 Heterocycloalkyl, the substituted C3-C 10 Cycloalkenyl, the substituted C1-C 10 Heterocycloalkenyl, the substituted C6-C 60 Aryl, the substituted C6-C 60 Aryloxy, the substituted C6-C 60 Arylthio, the substituted C1-C 60 Heteroaryl, the substituted C1-C 60 Heteroaryloxy, the substituted C1-C 60 At least one substituent among the heteroarylthio group, the substituted monovalent non-aromatic condensed polycyclic group, and the substituted monovalent non-aromatic condensed heteropolycyclic group is: Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; are independently substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) of at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; are each independently optionally substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) of at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 )和-P(=O)(Q 31 )(Q 32 ), Among them, Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, biphenyl group or terphenyl group, and * indicates the binding site with the adjacent atom.

12. The organic light emitting device according to claim 1, wherein The third compound is a compound represented by one of Formula 3 and Formula 4-1 to Formula 4-3: <Formula 3> M 31 (L 31 ) n31 (L 32 ) n32 <Formula 4-1> (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41 <Formula 4-2> (D 41 ) n41 -(L 41 ) a41 -(A 41 ) m41 -(L 42 ) a42 -(D 42 ) n42 <Formula 4-3> (A 41 ) m41 -(L 41 ) a41 -(D 41 ) n41 -(L 42 ) a42 -(A 42 ) m42 , Among them, in Formula 3, Formula 3A to Formula 3D and Formula 4-1 to Formula 4-3, M 31 is a transition metal of the first period, a transition metal of the second period or a transition metal of the third period of the periodic table, L 31 is a ligand represented by one of Formulas 3A to 3D, L 32 is a monodentate ligand, a bidentate ligand or a tridentate ligand, n 31 is 1 or 2, n 32 is 0, 1, 2, 3, or 4, A 31 To A 34 are independently C5-C 30 Carbocyclic or C1-C 30 heterocyclic group, T 31 to T 34 are independently a single bond, a double bond, *-O-*', *-S-*', *-C(=O)-*', *-S(=O)-*', *-C(R 35 )(R 36 )-*′、*-C(R 35 )=C(R 36 )-*′、*-C(R 35 )=*′、*-Si(R 35 )(R 36 )-*′、*-B(R 35 )-*′、*-N(R 35 )-*′ or *-P(R 35 )-*′, k31 to k34 are each independently 1, 2 or 3, Y 31 To Y 34 are independently a single bond, *-O-*', *-S-*', *-C(R 37 )(R 38 )-*'、*-Si(R 37 )(R 38 )-*′、*-B(R 37 )-*′、*-N(R 37 )-*' or *-P(R 37 )-*', *1, *2, *3 and *4 are independent of each other and represent 31 The binding site, R 31 to R 38 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 Heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -C(Q1)(Q2)(Q3), -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) or -P(=S)(Q1)(Q2), wherein R 31 to R 38 are optionally linked to each other to form a substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group, b31 to b34 are each independently an integer from 0 to 10, A 41 and A 42 are independently of each other: π-electron-poor nitrogen-containing ring groups, -C(R 41 )(R 42 )(R 43 )、-Si(R 41 )(R 42 )(R 43 )、-B(R 41 )(R 42 ) or -N(R 41 )(R 42 ); Substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-containing ring, -C(R 41 )(R 42 )(R 43 )、-Si(R 41 )(R 42 )(R 43 )、-B(R 41 )(R 42 ) and -N(R 41 )(R 42 ) is a π-electron-poor nitrogen-containing ring group of at least one of A π-electron-poor nitrogen-containing ring group substituted with at least one of the following groups: each independently substituted with deuterium, C1-C 60 Alkyl, π-electron-poor nitrogen-containing ring, -C(R 41 )(R 42 )(R 43 )、-Si(R 41 )(R 42 )(R 43 )、-B(R 41 )(R 42 ) and -N(R 41 )(R 42 ) is a π-electron-poor nitrogen-containing ring group of at least one of R 41 to R 43 are independently optionally via *-(z 41 )-*' connected to L 41 or L 42 To form C5-C 30 Carbocyclic or C1-C 30 heterocyclic group, z 41 For single bond, O, S, N(R 44 )、Se、Si(R 44 )(R 45 ) or C(R 44 )(R 45 ), R 41 to R 45 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amino, amidino, hydrazine, hydrazone, carboxylic acid or its salt, sulfonic acid or its salt, phosphate or its salt, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -C(Q1)(Q2)(Q3), -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), or -P(=S)(Q1)(Q2), m 41 and m 42 are independently 1, 2 or 3, D 41 and D 42 are independently of each other: -F, cyano, a π-electron-poor nitrogen-free ring group, a C(═O)-containing group, a P(═O)-containing group, or a P(═S)-containing group; are independently substituted with deuterium, -F, cyano, C1-C 60 At least one of an alkyl group and a π-electron-poor nitrogen-free ring group, a π-electron-poor nitrogen-free ring group, a C(═O)-containing group, a P(═O)-containing group, or a P(═S)-containing group; The C1-C ... 60 Alkyl or π-electron-poor nitrogen-free ring group; a nitrogen-free π-electron-poor ring group, a C(═O)-containing group, a P(═O)-containing group or a P(═S)-containing group, each of which is independently substituted with at least one of the following groups: a deuterium-containing group, a -F-containing group, a cyano group, a C1-C 60 A C1-C12-C16-C17-C18-C19-C19-C18 ... 60 Alkyl groups and π-electron-poor nitrogen-free ring groups; are independently substituted with at least one of the following groups 60 Alkyl or π-electron-poor nitrogen-free ring group: each independently substituted with deuterium, -F, cyano, C1-C 60 at least one of an alkyl group and a π-electron-poor nitrogen-free ring group; and are independently substituted with at least one of the following groups 60 Alkyl or π-electron-poor nitrogen-free ring group: each independently substituted with at least one of -F, cyano and π-electron-poor nitrogen-free ring group C1-C 60 Alkyl groups and π-electron-poor nitrogen-free ring groups, n 41 and n 42 are independently 1, 2 or 3, L 41 and L 42 are independently substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group, a 41 and a 42 are independently 0, 1, 2 or 3, and The substituted C1-C 60 Alkyl, the substituted C2-C 60 Alkenyl, the substituted C2-C 60 Alkynyl, the substituted C1-C 60 Alkoxy, the substituted C3-C 10 Cycloalkyl, the substituted C1-C 10 Heterocycloalkyl, the substituted C3-C 10 Cycloalkenyl, the substituted C1-C 10 Heterocycloalkenyl, the substituted C6-C 60 Aryl, the substituted C6-C 60 Aryloxy, the substituted C6-C 60 Arylthio, the substituted C1-C 60 Heteroaryl, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed heteropolycyclic group, the substituted C5-C 60 The carbocyclic group and the substituted C1-C 60 At least one substituent in the heterocyclic group is: Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; are independently substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) of at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; are independently substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) of at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 Heteroarylthio groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 )和-P(=O)(Q 31 )(Q 32 ), Among them, Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, C1-C 60 Heteroaryloxy, C1-C 60 a heteroarylthio group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, or a terphenyl group.

13. The organic light emitting device according to claim 12, wherein: The third compound is a compound represented by one of Formula 3-1 and Formula 3-2: Among them, in formula 3-1 and formula 3-2, X 31 To X 40 are independently N or C, A 31 -A 34 、Y 31 -Y 34 、M 31 、T 31 -T 33 、R 32 -R 34 、L 32 、k 31 -k 33 、n 31 -n 32 and b 32 -b 34 The term "has the meaning given in claim 12".

14. The organic light emitting device according to claim 12, wherein: D in Formula 4-1 to Formula 4-3 41 and D 42 are each independently a group represented by the following formula 12: <Formula 12> In formula 12, X 121 O, S, N (R 123 ) or C(R 123 )(R 124 ), X 122 For single bond, O, S, N(R 125 ) or C(R 125 )(R 126 ), A 121 and A 122 Each of the is a π-electron-poor nitrogen-free ring group, R 121 to R 126 are independently of each other: Binding site, hydrogen, deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -Si(Q 31 )(Q 32 )(Q 33 )、-B(Q 31 )(Q 32 ) or -N(Q 31 )(Q 32 );or are independently substituted with deuterium, C1-C 20 Alkyl, phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, yl, fluoranthene, fluorenyl, carbazolyl, dibenzofuranyl, dibenzothiophenyl, benzofluorenyl, benzocarbazolyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzofluorenyl, dibenzocarbazolyl, dinaphthofuranyl, dinaphthothiophenyl, -Si(Q 21 )(Q 22 )(Q 23 )、-B(Q 21 )(Q 22 ) and -N(Q 21 )(Q 22 ) of at least one of phenyl, biphenyl, terphenyl, naphthyl, phenanthrenyl, benzo[9,10]phenanthrenyl, 1-Hydroxy-1-Methyl ... 123 and R 124 are optionally linked to each other to form a π-electron-poor nitrogen-free ring group, R 125 and R 126 are optionally connected to each other to form a π-electron-poor nitrogen-free ring group, and R 121 to R 126 At least one of them is a binding site, and b121 and b122 are each independently 1, 2, 3, 4, 5 or 6, and Among them, Q 21 To Q 23 and Q 31 To Q 33 has the meaning given in claim 8.

15. The organic light emitting device according to claim 1, wherein The fourth compound is a compound represented by one of Formula 5(1), Formula 5(2), Formula 5(3) and Formula 501: <Formula 5(1)> <Formula 5(2)> <Formula 5(3)> <Formula 501> Among them, in formula 5 (1) to formula 5 (3), Y 51 To Y 53 are independently N, B or P, X 51 To X 55 are independently single bonds, O, S, N(R 55 )、B(R 55 )、C(R 55 )(R 56 ) or Si(R 55 )(R 56 ), X 56 N, C (R 55 ) or Si(R 55 ), m51 and m54 are each independently 0, 1 or 2. When m51 is 0, A 51 and A 52 are not connected to each other, and when m54 is 0, A 53 and A 54 Not connected to each other, A 51 To A 55 are independently C5-C 60 Carbocyclic or C1-C 60 heterocyclic group, R 51 to R 60 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, substituted or unsubstituted C1-C 60 Alkyl, substituted or unsubstituted C2-C 60 Alkenyl, substituted or unsubstituted C2-C 60 Alkynyl, substituted or unsubstituted C1-C 60 Alkoxy, substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, -Si(Q1)(Q2)(Q3), -B(Q1)(Q2), -C(=O)(Q1), -N(Q1)(Q2), -P(=O)(Q1)(Q2) or -S(=O)2(Q1)(Q2), a51 to a54 and a60 are each independently 0 to 10, Wherein, in formula 501, Ar 501 is substituted or unsubstituted C5-C 60 Carbocyclic or substituted or unsubstituted C1-C 60 heterocyclic group, L 501 To L 503 are independently substituted or unsubstituted C3-C 10 Cycloalkylene, substituted or unsubstituted C1-C 10 Heterocycloalkylene, substituted or unsubstituted C3-C 10 Cycloalkenylene, substituted or unsubstituted C1-C 10 Heterocycloalkenylene, substituted or unsubstituted C6-C 60 Arylene, substituted or unsubstituted C1-C 60 heteroarylene group, a substituted or unsubstituted divalent non-aromatic condensed polycyclic group, and a substituted or unsubstituted divalent non-aromatic condensed heteropolycyclic group, xd1 to xd3 are each independently 0, 1, 2 or 3, R 501 and R 502 are independently substituted or unsubstituted C3-C 10 Cycloalkyl, substituted or unsubstituted C1-C 10 Heterocycloalkyl, substituted or unsubstituted C3-C 10 Cycloalkenyl, substituted or unsubstituted C1-C 10 Heterocycloalkenyl, substituted or unsubstituted C6-C 60 Aryl, substituted or unsubstituted C6-C 60 Aryloxy, substituted or unsubstituted C6-C 60 Arylthio, substituted or unsubstituted C1-C 60 heteroaryl, a substituted or unsubstituted monovalent non-aromatic condensed polycyclic group, or a substituted or unsubstituted monovalent non-aromatic condensed heteropolycyclic group, xd4 is 1, 2, 3, 4, 5, or 6, and The substituted C5-C 60 Carbocyclic group, the substituted C1-C 60 Heterocyclic group, the substituted C1-C 60 Alkyl, the substituted C2-C 60 Alkenyl, the substituted C2-C 60 Alkynyl, the substituted C1-C 60 Alkoxy, the substituted C3-C 10 Cycloalkyl, the substituted C1-C 10 Heterocycloalkyl, the substituted C3-C 10 Cycloalkenyl, the substituted C1-C 10 Heterocycloalkenyl, the substituted C6-C 60 Aryl, the substituted C6-C 60 Aryloxy, the substituted C6-C 60 Arylthio, the substituted C1-C 60 Heteroaryl, the substituted C1-C 60 Heteroaryloxy, the substituted C1-C 60 Heteroarylthio, the substituted monovalent non-aromatic condensed polycyclic group, the substituted monovalent non-aromatic condensed heteropolycyclic group, the substituted C3-C 10 Cycloalkylene, the substituted C1-C 10 Heterocycloalkylene, the substituted C3-C 10 Cycloalkenylene, the substituted C1-C 10 Heterocycloalkenylene, the substituted C6-C 60 Arylene, the substituted C1-C 60 At least one substituent in the heteroarylene group, the substituted divalent non-aromatic condensed polycyclic group, and the substituted divalent non-aromatic condensed heteropolycyclic group is: Deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; are independently substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 11 )(Q 12 )(Q 13 )、-N(Q 11 )(Q 12 )、-B(Q 11 )(Q 12 ),-C(=O)(Q 11 )、-S(=O)2(Q 11 ) and -P(=O)(Q 11 )(Q 12 ) of at least one of C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl and C1-C 60 alkoxy; C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; are independently substituted with deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl, monovalent non-aromatic condensed polycyclic group, monovalent non-aromatic condensed heteropolycyclic group, -Si(Q 21 )(Q 22 )(Q 23 )、-N(Q 21 )(Q 22 )、-B(Q 21 )(Q 22 ),-C(=O)(Q 21 )、-S(=O)2(Q 21 ) and -P(=O)(Q 21 )(Q 22 ) of at least one of C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C6-C 60 Aryloxy, C6-C 60 Arylthio, C1-C 60 Heteroaryl groups, monovalent non-aromatic condensed polycyclic groups, and monovalent non-aromatic condensed heteropolycyclic groups; and -Si(Q 31 )(Q 32 )(Q 33 )、-N(Q 31 )(Q 32 )、-B(Q 31 )(Q 32 )、-C(=O)(Q 31 )、-S(=O)2(Q 31 )和-P(=O)(Q 31 )(Q 32 ), Among them, Q1 to Q3, Q 11 To Q 13 , Q 21 To Q 23 and Q 31 To Q 33 are independently hydrogen, deuterium, -F, -Cl, -Br, -I, hydroxyl, cyano, nitro, amidino, hydrazine, hydrazone, C1-C 60 Alkyl, C2-C 60 Alkenyl, C2-C 60 Alkynyl, C1-C 60 Alkoxy, C3-C 10 Cycloalkyl, C1-C 10 Heterocycloalkyl, C3-C 10 Cycloalkenyl, C1-C 10 Heterocycloalkenyl, C6-C 60 Aryl, C1-C 60 a heteroaryl group, a monovalent non-aromatic condensed polycyclic group, a monovalent non-aromatic condensed heteropolycyclic group, a biphenyl group, or a terphenyl group.

16. The organic light emitting device according to claim 1, wherein The first compound is a compound in Group I, The second compound is a compound in Group II, The third compound is a compound in Group III-1 and Group III-2, and The fourth compound is a compound in Group IV: <Group I> <Group II> <Group III-1> <Group III-2> <Group IV> 17. A device comprising: A thin film transistor comprising a source electrode, a drain electrode and an active layer; and the organic light-emitting device according to any one of claims 1 to 16, The first electrode of the organic light-emitting device is electrically connected to one of the source electrode and the drain electrode of the thin film transistor.

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