Organic light emitting diode and organic light emitting device having the same

Abstract

An organic light-emitting diode (OLED) in which at least one light-emitting material layer includes a dopant having the following structure represented by Formula 1 and a fused heteroaryl host and / or an azine host, and an organic light-emitting device including the OLED. The OLED and the organic light-emitting device including the host and the dopant can improve their luminous efficiency and luminous lifetime. [Formula 1] Ir(L A ) m (L B ) n。

Description

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to and the benefit of Korean Patent Application No. 10-2021-0165807, filed in Korea on November 26, 2021, which is hereby expressly incorporated into this application in its entirety. Technical Field

[0003] The present disclosure relates to an organic light emitting diode (OLED), for example, an organic light emitting diode (OLED) having improved luminous efficiency and luminous lifetime, and an organic light emitting device including the same. Background Art

[0004] Flat panel display devices including organic light emitting diodes (OLEDs) have attracted attention as display devices that can replace liquid crystal display devices (LCDs). OLEDs can be formed to be smaller than OLEDs can be formed on flexible, transparent substrates such as plastic substrates, making it easy to realize flexible or foldable display devices. They can also be driven at lower voltages, offering superior color purity compared to LCDs.

[0005] Since fluorescent materials only use singlet exciton energy during the luminescence process, the fluorescent materials of the prior art show low luminous efficiency. In contrast, phosphorescent materials can show high luminous efficiency because they use triplet exciton energy as well as singlet exciton energy during the luminescence process. However, examples of phosphorescent materials include metal complexes, which have a short luminescence lifetime in commercial applications. Therefore, there is still a need to develop luminescent compounds or organic light-emitting diodes that can improve luminous efficiency and luminescence lifetime. Summary of the Invention

[0006] Accordingly, embodiments of the present disclosure are directed to organic light emitting diodes and organic light emitting devices that substantially obviate one or more problems due to limitations and disadvantages of the related art.

[0007] One aspect of the present disclosure is to provide an organic light emitting diode (OLED) having improved luminous efficiency and luminous lifetime. Another aspect of the present disclosure is to provide an organic light emitting device including the organic light emitting diode.

[0008] Additional features and aspects will be set forth in the description that follows, and in part will become apparent from the description, or may be learned by practice of the disclosed concepts provided herein. Other features and aspects of the disclosed concepts may be realized and attained by the structure particularly pointed out or derived from the written description, as well as the claims and drawings.

[0009] To achieve these and other aspects of the disclosed concept, as specifically and broadly described, in one aspect, the present disclosure provides an organic light emitting diode comprising: a first electrode; a second electrode facing the first electrode; and a light emitting layer disposed between the first electrode and the second electrode and comprising at least one light emitting material layer, the light emitting material layer comprising a host and a dopant, the host comprising: a first host having a structure represented by Formula 7, and a second host having a structure represented by Formula 9, the dopant comprising an organometallic compound having a structure represented by Formula 1:

[0010] in:

[0011] Formula 1 is:

[0012] [Formula 1]

[0013] Ir(L A ) m (L B ) n

[0014] In formula 1,

[0015] L A Having a structure represented by Formula 2;

[0016] L B is an auxiliary ligand having a structure represented by Formula 3;

[0017] m is 1, 2, or 3;

[0018] n is 0, 1, or 2; and

[0019] m+n is 3,

[0020] Formula 2 is:

[0021] [Formula 2]

[0022]

[0023] In formula 2,

[0024] X1 and X2 are each independently CR7 or N;

[0025] X3 to X5 are each independently CR8 or N, and at least one of X3 to X5 is CR8;

[0026] X6 to X9 are each independently CR9 or N, and at least one of X6 to X9 is CR9;

[0027] When two adjacent groups among R1 to R5, and / or

[0028] When b is an integer of 2 or greater, two adjacent R6, and / or

[0029] X3 and X4 or X4 and X5, and / or

[0030] X6 and X7, X7 and X8, or X8 and X9,

[0031] When no ring is formed,

[0032] R1 to R9 are each independently hydrogen, protium, deuterium, unsubstituted or substituted C1-C 20 Alkyl, unsubstituted or substituted C1-C 20 Heteroalkyl, unsubstituted or substituted C2-C 20 Alkenyl, unsubstituted or substituted C2-C 20 Heteroalkenyl, unsubstituted or substituted C1-C 20 Alkoxy, carboxyl, nitrile, isonitrile, sulfonamide, phosphine, unsubstituted or substituted C1-C 20 Alkylamino, unsubstituted or substituted C1-C 20 Alkylsilyl, unsubstituted or substituted C4-C 30 Alicyclic, unsubstituted or substituted C3-C 30 Heteroalicyclic, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl, and wherein when b is 2, 3 or 4, each R6 is the same as or different from each other;

[0033] Optionally,

[0034] Two adjacent groups among R1 to R5, and / or

[0035] When b is 2, 3 or 4, two adjacent R6, and / or

[0036] X3 and X4 or X4 and X5, and / or

[0037] X6 and X7, X7 and X8, or X8 and X9

[0038] further linked together directly or indirectly to form unsubstituted or substituted C4-C 20 Alicyclic, unsubstituted or substituted C3-C 20 Heteroalicyclic, unsubstituted or substituted C6-C 30aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic rings;

[0039] a is 0, 1, or 2; and

[0040] b is 0, 1, 2, 3, or 4,

[0041] Formula 3 is:

[0042] [Formula 3]

[0043]

[0044] Formula 7 is:

[0045] [Formula 7]

[0046]

[0047] In formula 7,

[0048] X is CR 43 R 44 NR 43 、R 43 P=O, O or S;

[0049] Z1 to Z4 are each independently CR 45 or N;

[0050] R 41 to R 45 are independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl,

[0051] Optionally, R 43 and R 44 further linked together directly or indirectly to form unsubstituted or substituted C6-C 30 Spiroaromatic ring, or unsubstituted or substituted C3-C 30 Spiroheteroaromatic ring,

[0052] Optionally, when p is 2, 3 or 4, two adjacent R 42 , and / or

[0053] Two adjacent R 45 Forming unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic rings,

[0054] where R 41 to R 45At least one of the C6-C 30 Aryl, unsubstituted or substituted C3-C 30 Heteroaryl, unsubstituted or substituted C6-C 30 Spiroaromatic ring, unsubstituted or substituted C3-C 30 Spiroheteroaromatic ring, unsubstituted or substituted C6-C 30 aromatic ring, and unsubstituted or substituted C3-C 30 At least one heteroaromatic ring, wherein when p is 2, 3 or 4, each R 42 Same or different from each other,

[0055] Optionally, C6-C 30 Aryl, C3-C 30 Heteroaryl, C6-C 30 Spiroaromatic ring, C3-C 30 Spiroheteroaromatic ring, C6-C 30 Aromatic ring and C3-C 30 Each substituent on the heteroaromatic ring is independently unsubstituted or further substituted with a C1-C 10 Alkyl, C6-C 30 Aryl and C3-C 30 at least one substitution in a heteroaryl group;

[0056] L1 and L2 are each independently a single bond, an unsubstituted or substituted C6-C 30 Arylene, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Arylene and unsubstituted or substituted C3-C 30 The heteroaryl groups are each independently substituted with unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic ring forms a spiro structure,

[0057] Optionally, C6-C 30 Arylene and C3-C 30 Each substituent on the heteroaryl group is independently unsubstituted or further substituted with C1-C 10 Alkyl, C6-C 30 Aryl and C3-C 30 at least one substitution in a heteroaryl group; and

[0058] p is 0, 1, 2, 3, or 4,

[0059] [Formula 9]

[0060]

[0061] In formula 9,

[0062] R 51 to R 53 Each is independently unsubstituted or substituted C6-C 30 Aryl or unsubstituted or substituted C3-C 30 Heteroaryl, where R 51 to R 53 At least one of has a structure represented by Formula 10A or Formula 10B;

[0063] Y1, Y2 and Y3 are each independently CR 54 or N, wherein at least one of Y1, Y2 and Y3 is N;

[0064] R 54 are independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each independently unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure; and

[0065] L is a single bond, unsubstituted or substituted C6-C 30 Arylene, or unsubstituted or substituted C3-C 30 Heteroaryl; optionally, unsubstituted or substituted C6-C 30 Arylene and unsubstituted or substituted C3-C 30 The heteroaryl groups are each independently substituted with unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic ring forms a spiro structure,

[0066] Formula 10A is:

[0067] [Formula 10A]

[0068]

[0069] Wherein in Formula 10A,

[0070] The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9;

[0071] R 61 to R 68 are each independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each independently unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure; and

[0072] Optionally,

[0073] R 61 to R 68 At least two adjacent groups in the group are further directly or indirectly linked together to form an unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 Heteroaromatic ring, optionally unsubstituted or substituted C6-C 30 Aromatic ring and unsubstituted or substituted C3-C 30 The heteroaromatic rings are each independently connected to an unsubstituted or substituted C6-C 20 aromatic ring, or unsubstituted or substituted C3-C 20 The heteroaromatic ring forms a spiro structure,

[0074] Formula 10B is:

[0075] [Formula 10B]

[0076]

[0077] Wherein in Formula 10B,

[0078] The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9;

[0079] R 71 is hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure;

[0080] R 72 to R 78 are each independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure; and

[0081] Optionally,

[0082] R 72 to R 78 At least two adjacent groups in the group are further directly or indirectly linked together to form an unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 Heteroaromatic ring, optionally unsubstituted or substituted C6-C 30 Aromatic ring and unsubstituted or substituted C3-C 30 The heteroaromatic rings are each independently connected to an unsubstituted or substituted C6-C 20 aromatic ring, or unsubstituted or substituted C3-C 20 The heteroaromatic rings form a spiro structure.

[0083] The light-emitting layer may include a single light-emitting portion or a plurality of light-emitting portions to form a tandem structure.

[0084] On the other hand, the present disclosure provides an organic light-emitting diode, comprising: a first electrode; a second electrode facing the first electrode; and a light-emitting layer, the light-emitting layer being arranged between the first electrode and the second electrode, the light-emitting layer comprising a first light-emitting portion arranged between the first electrode and the second electrode and comprising a blue light-emitting material layer; a second light-emitting portion arranged between the first light-emitting portion and the second electrode and comprising at least one light-emitting material layer; and a first charge generation layer arranged between the first light-emitting portion and the second light-emitting portion, wherein the at least one light-emitting material layer comprises a host and a dopant, the host comprising a first host having a structure represented by Formula 7 and a second host having a structure represented by Formula 9, and the dopant comprising an organic metal compound having a structure represented by Formula 1.

[0085] In another aspect, the present disclosure provides an organic light-emitting device, for example, an organic light-emitting display device or an organic light-emitting lighting device, comprising a substrate and the organic light-emitting diode located on the substrate.

[0086] The organometallic compound used as a dopant includes a metal atom covalently or coordinately bonded to a fused heteroaromatic ring ligand comprising at least five rings and a pyridinium ring ligand. The organometallic compound may be a heteroleptic metal complex including two different bidentate ligands coordinated to the metal atom. By combining two different bidentate ligands, the photoluminescence color purity and emission color of the metal compound can be easily controlled.

[0087] Each of a fused heteroaryl material having at least one nitrogen atom and an azine-based material having a fused heteroaryl moiety can be used as the first host and the second host in the EML, respectively. When a fused heteroaryl material having at least one nitrogen atom and / or an azine-based material having excellent electron transport properties are used together with an organometallic compound, charge and exciton energy can be rapidly transferred from the fused heteroaryl material having at least one nitrogen atom and the azine-based material to the organometallic compound. When the light-emitting layer includes an organometallic compound as a dopant and a fused heteroaryl material and / or an azine-based material as a host, the organic light-emitting diode and organic light-emitting device can reduce its driving voltage and improve its luminous efficiency and luminous lifetime.

[0088] 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 disclosed concept as claimed. BRIEF DESCRIPTION OF THE DRAWINGS

[0089] The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this application, illustrate embodiments of the disclosure and together with the description serve to explain the principle of the disclosure.

[0090] Figure 1 A schematic circuit diagram of an organic light emitting display device according to the present disclosure is shown.

[0091] Figure 2 A cross-sectional view of an organic light emitting display device as an example of an organic light emitting device according to an exemplary embodiment of the present disclosure is shown.

[0092] Figure 3 A cross-sectional view of an organic light emitting diode having a single light emitting portion according to an exemplary embodiment of the present disclosure is shown.

[0093] Figure 4 A cross-sectional view of an organic light emitting display device according to another exemplary embodiment of the present disclosure is shown.

[0094] Figure 5 A cross-sectional view of an organic light emitting diode having a double stack structure according to another exemplary embodiment of the present disclosure is shown.

[0095] Figure 6 A cross-sectional view of an organic light emitting diode having a triple stack structure according to another exemplary embodiment of the present disclosure is shown. DETAILED DESCRIPTION

[0096] Reference will now be made in detail to various aspects of the present disclosure, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numerals will be used throughout the drawings to refer to the same or like parts.

[0097] The advantages and features of the present disclosure and its implementation methods will be illustrated by the exemplary embodiments described below in conjunction with the accompanying drawings. However, the present disclosure can be embodied in different forms and should not be construed as being limited to the exemplary embodiments set forth herein. Rather, these exemplary embodiments are provided so that the present disclosure can be sufficiently thorough and complete to help those skilled in the art fully understand the scope of the present disclosure. In addition, the scope of protection of the present disclosure is defined by the claims and their equivalents.

[0098] The shapes, sizes, ratios, angles, quantities, etc. shown in the accompanying drawings to describe the various exemplary embodiments of the present disclosure are given by way of example only. Therefore, the present disclosure is not limited to the description in the accompanying drawings. Unless otherwise specified, the same or similar elements are represented by the same reference numerals throughout the specification.

[0099] In the following description, where a detailed description of related known functions or configurations may unnecessarily obscure the main points of the present disclosure, a detailed description of such known configuration functions may be omitted.

[0100] In this specification, when the terms "comprising," "having," "including," etc. are used, one or more other elements may be added unless a term such as "only" is used. Elements described in the singular are intended to include plural elements, and vice versa, unless the context clearly indicates otherwise.

[0101] When interpreting an element, the element is to be interpreted as including an error or tolerance range even in the case where an explicit description of such error or tolerance range is not provided.

[0102] In the description of various embodiments of the present disclosure, when describing a positional relationship, for example, when using “on,” “above,” “below,” “above,” “below,” “near,” “immediately adjacent,” etc. to describe the positional relationship between two parts, one or more other parts may be located between the two parts, unless more restrictive terms such as “immediately,” “directly,” or “immediately adjacent” are used. For example, when one element or layer is disposed “on” another element or layer, a third layer or element may be interposed therebetween.

[0103] When describing a temporal relationship, when the temporal order is described as, for example, "after," "subsequently," "next," or "before," discontinuities may be included unless more restrictive terms such as "just," "immediately," or "directly" are used.

[0104] Although the terms "first," "second," etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element may be referred to as a second element, and similarly, a second element may be referred to as a first element, without departing from the scope of this disclosure.

[0105] Although the terms "first," "second," A, B, (a), (b), etc. may be used herein to describe various elements, these elements should not be construed as limited by these terms, as they are not used to define a particular order, priority, or quantity of the corresponding elements. These terms are only used to distinguish one element from another.

[0106] When stating that an element or layer is “connected” to another element or layer, it means that the element or layer is not only directly connected to the other element or layer but also may be indirectly connected or adhered to the other element or layer with one or more intervening elements or layers “disposed” or “interposed” therebetween, unless otherwise specified.

[0107] The term "at least one" should be understood to include any and all combinations of one or more of the associated listed items. For example, the meaning of "at least one of a first element, a second element, and a third element" includes the combination of all three listed elements, the combination of any two of the three elements, and each individual element, the first element, the second element, and the third element.

[0108] The features of the various embodiments of the present disclosure may be coupled or combined with each other in part or in whole, and may interoperate with each other in various ways and be driven technically as will be fully understood by those skilled in the art. The embodiments of the present disclosure may be implemented independently of each other, or may be implemented together in an interdependent relationship.

[0109] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings. When reference numerals are added to the elements of each drawing, similar reference numerals may refer to similar elements even though the same elements are shown in other drawings. In addition, for ease of description, the scale of each element illustrated in the drawings may differ from the actual scale. Therefore, the illustrated elements are not limited to the specific scales they are illustrated in the drawings.

[0110] The present disclosure relates to an organic light-emitting diode (OLED), wherein at least one luminescent material layer includes an organometallic compound having advantageous optical properties and an organic compound having advantageous charge transport properties, and to an organic light-emitting device (OLED) including the OLED. These diodes and the device can reduce their driving voltage and maximize their luminous efficiency and lifetime. The OLED can be applied to OLEDs such as OLED displays or OLED lighting devices.

[0111] Figure 1 Schematic circuit diagram of an organic light emitting display device according to the present disclosure is shown. Figure 1 As shown, in the organic light-emitting display device 100, the gate lines GL, the data lines DL, and the power lines PL each cross each other to define a pixel region P. A switching thin film transistor Ts, a driving thin film transistor Td, a storage capacitor Cst, and an organic light-emitting diode D are disposed within the pixel region P. The pixel region P may include a red (R) pixel region, a green (G) pixel region, and a blue (B) pixel region. However, embodiments of the present disclosure are not limited to these examples.

[0112] A switching thin film transistor Ts is connected to a gate line GL and a data line DL. A driving thin film transistor Td and a storage capacitor Cst are connected between the switching thin film transistor Ts and a power line PL. An organic light emitting diode D is connected to the driving thin film transistor Td. When the switching thin film transistor Ts is turned on by a gate signal applied to the gate line GL, a data signal applied to the data line DL is applied to the gate electrode of the driving thin film transistor Td and one electrode of the storage capacitor Cst through the switching thin film transistor Ts.

[0113] The driving thin film transistor Td is driven by applying a voltage to the gate electrode 130 ( Figure 2) It is turned on by the data signal, so that a current proportional to the data signal is supplied from the power supply line PL to the organic light-emitting diode D through the driving thin-film transistor Td. Then, the organic light-emitting diode D emits light with a brightness proportional to the current flowing through the driving thin-film transistor Td. In this case, the storage capacitor Cst is charged with a voltage proportional to the data signal, so that the voltage of the gate in the driving thin-film transistor Td remains constant during one frame. Therefore, the organic light-emitting display device can display a desired image.

[0114] Figure 2 FIG. shows a schematic cross-sectional view of an organic light-emitting display device according to an exemplary embodiment of the present disclosure. As Figure 2 shown, the organic light-emitting display device 100 includes a substrate 102, a thin-film transistor Tr located on the substrate 102, and an organic light-emitting diode D connected to the thin-film transistor Tr. As an example, the substrate 102 may include a red pixel region, a green pixel region, and a blue pixel region, and an organic light-emitting diode D in each pixel region. Each organic light-emitting diode D emits red light, green light, or blue light, respectively, and is accordingly located in the red pixel region, the green pixel region, and the blue pixel region.

[0115] The substrate 102 may include, but is not limited to, glass, a thin flexible material, and / or polymer plastics. For example, the flexible material may be selected from, but is not limited to, polyimide (PI), polyethersulfone (PES), polyethylene naphthalate (PEN), polyethylene terephthalate (PET), polycarbonate (PC), and / or a combination thereof. The substrate 102 on which the thin-film transistor Tr and the organic light-emitting diode D are arranged forms an array substrate.

[0116] A buffer layer 106 may be provided on the substrate 102. The thin-film transistor Tr may be provided on the buffer layer 106. The buffer layer 106 may be omitted. A semiconductor layer 110 is provided on the buffer layer 106. In one exemplary embodiment, the semiconductor layer 110 may include, but is not limited to, an oxide semiconductor material. In this case, a light-shielding pattern may be provided below the semiconductor layer 110, and the light-shielding pattern may prevent or reduce the incidence of light toward the semiconductor layer 110, and thereby prevent or reduce the deterioration of the semiconductor layer 110 by light. Alternatively, the semiconductor layer 110 may include polysilicon. In this case, the relative edges of the semiconductor layer 110 may be doped with impurities.

[0117] A gate insulating layer 120 including an insulating material is provided on the semiconductor layer 110. The gate insulating layer 120 may include, but is not limited to, an inorganic insulating material such as silicon oxide (SiO x , where 0 < x ≤ 2) or silicon nitride (SiN x , where 0 < x ≤ 2).

[0118] The gate electrode 130 made of a conductive material such as metal is disposed on the gate insulating layer 120 so as to correspond to the center of the semiconductor layer 110. Figure 2 When the gate insulating layer 120 is patterned over the entire area of ​​the substrate 102 as shown in FIG. 1 , the gate insulating layer 120 may be patterned in the same manner as the gate electrode 130 .

[0119] An interlayer insulating layer 140 including an insulating material is provided on the gate 130 and on the entire surface of the substrate 102. The interlayer insulating layer 140 may include, but is not limited to, silicon oxide (SiO x ) or silicon nitride (SiN x ), or an organic insulating material such as benzocyclobutene or photo-acryl.

[0120] The interlayer insulating layer 140 has a first semiconductor layer contact hole 142 and a second semiconductor layer contact hole 144 that expose or do not cover a portion of the surface closer to the opposite end than the center of the semiconductor layer 110. The first semiconductor layer contact hole 142 and the second semiconductor layer contact hole 144 are provided on opposite sides of the gate 130 and are spaced apart from the gate 130. The first semiconductor layer contact hole 142 and the second semiconductor layer contact hole 144 are formed at Figure 2 Alternatively, when the gate insulating layer 120 is patterned in the same manner as the gate electrode 130 , the first semiconductor layer contact hole 142 and the second semiconductor layer contact hole 144 are formed only in the interlayer insulating layer 140 .

[0121] A source electrode 152 and a drain electrode 154 made of a conductive material such as metal are provided on the interlayer insulating layer 140. The source electrode 152 and the drain electrode 154 are spaced apart from each other on opposite sides of the gate electrode 130. The source electrode 152 and the drain electrode 154 contact both sides of the semiconductor layer 110 through the first semiconductor layer contact hole 142 and the second semiconductor layer contact hole 144, respectively.

[0122] The semiconductor layer 110 , the gate electrode 130 , the source electrode 152 , and the drain electrode 154 constitute a thin film transistor Tr serving as a driving element. Figure 2 The thin film transistor Tr in the embodiment has a coplanar structure in which the gate 130, the source 152, and the drain 154 are arranged on the semiconductor layer 110. Alternatively, the thin film transistor Tr may have an inverted staggered structure in which the gate is arranged below the semiconductor layer and the source and drain are arranged on the semiconductor layer. In this case, the semiconductor layer may include amorphous silicon.

[0123] A gate line GL and a data line DL intersecting each other to define a pixel region P, and a switching element Ts connected to the gate line GL and the data line DL may be further formed in the pixel region P. The switching element Ts is connected to a thin film transistor Tr serving as a driving element. Furthermore, a power line PL is spaced apart from and parallel to the gate line GL or the data line DL. The thin film transistor Tr may further include a storage capacitor Cst configured to maintain a constant voltage of the gate electrode 130 within one frame.

[0124] A passivation layer 160 is disposed on the source electrode 152 and the drain electrode 154. The passivation layer 160 covers the entire thin film transistor Tr on the substrate 102. The passivation layer 160 has a flat top surface and a drain contact hole 162 that exposes or does not cover the drain electrode 154 of the thin film transistor Tr. When the drain contact hole 162 is disposed on the second semiconductor layer contact hole 144, it may be spaced apart from the second semiconductor layer contact hole 144.

[0125] The organic light emitting diode (OLED) D includes a first electrode 210 disposed on the passivation layer 160 and connected to the drain electrode 154 of the thin film transistor Tr. The OLED D further includes a light emitting layer 230 and a second electrode 220 sequentially disposed on the first electrode 210.

[0126] A first electrode 210 is provided in each pixel region. The first electrode 210 may be an anode and include a conductive material having a relatively high work function value. For example, the first electrode 210 may include, but is not limited to, a transparent conductive oxide (TCO). More specifically, the first electrode 210 may include indium tin oxide (ITO), indium zinc oxide (IZO), indium tin zinc oxide (ITZO), tin oxide (SnO), zinc oxide (ZnO), indium cerium oxide (ICO), aluminum-doped zinc oxide (AZO), and / or the like.

[0127] In one exemplary embodiment, when the organic light-emitting display device 100 is a bottom-emission type, the first electrode 210 may have a single-layer structure of TCO. Alternatively, when the organic light-emitting display device 100 is a top-emission type, a reflective electrode or reflective layer may be disposed below the first electrode 210. For example, the reflective electrode or reflective layer may include, but is not limited to, silver (Ag) or an aluminum-palladium-copper (APC) alloy. In a top-emission type OLED D, the first electrode 210 may have a triple-layer structure of ITO / Ag / ITO or ITO / APC / ITO.

[0128] In addition, a bank layer 164 is provided on the passivation layer 160 so as to cover the edge of the first electrode 210. The bank layer 164 exposes or does not cover the center of the first electrode 210 corresponding to each pixel area. The bank layer 164 may be omitted.

[0129] The light emitting layer 230 is provided on the first electrode 210. In one exemplary embodiment, the light emitting layer 230 may have a single-layer structure of a light emitting material layer (EML). Alternatively, the light emitting layer 230 may have a multi-layer structure of a hole injection layer (HIL), a hole transport layer (HTL), an electron blocking layer (EBL), an EML, a hole blocking layer (HBL), an electron transport layer (ETL), and / or an electron injection layer (EIL) (see Figure 3 、 Figure 5 ,and Figure 6 In one aspect, the light emitting layer 230 may have a single light emitting portion. Alternatively, the light emitting layer 230 may have multiple light emitting portions to form a tandem structure.

[0130] The light emitting layer 230 may include at least one host and a dopant, so that the OLED D and the organic light emitting display device may reduce their driving voltage and may improve their light emitting efficiency and light emitting lifetime.

[0131] The second electrode 220 is disposed on the substrate 102 over which the light-emitting layer 230 is disposed. The second electrode 220 may be disposed over the entire display area. The second electrode 220 may include a conductive material having a relatively low work function value compared to the first electrode 210. The second electrode 220 may be a cathode. For example, the second electrode 220 may include at least one of, but not limited to, aluminum (Al), magnesium (Mg), calcium (Ca), silver (Ag), alloys thereof such as aluminum-magnesium alloy (Al-Mg), and combinations thereof. When the organic light-emitting display device 100 is a top emission type, the second electrode 220 is relatively thin to have a light-transmitting (semi-light-transmitting) characteristic.

[0132] In addition, an encapsulation film 170 may be provided on the second electrode 220 to prevent or reduce external moisture from penetrating into the organic light emitting diode D. The encapsulation film 170 may have, but is not limited to, a laminated structure of a first inorganic insulating film 172, an organic insulating film 174, and a second inorganic insulating film 176. The encapsulation film 170 may be omitted.

[0133] A polarizing plate may be attached to the packaging film to reduce reflection of external light. For example, the polarizing plate may be a circular polarizing plate. When the organic light-emitting display device 100 is a bottom-emitting type, the polarizer may be disposed below the substrate 102. Alternatively, when the organic light-emitting display device 100 is a top-emitting type, the polarizer may be disposed on the packaging film 170. In addition, a cover window may be attached to the packaging film 170 or the polarizer. In this case, the substrate 102 and the cover window may have flexible properties, and thus the organic light-emitting display device 100 may be a flexible display device.

[0134] Next, the OLED D will be described in more detail. Figure 31 is a schematic cross-sectional view of an organic light emitting diode having a single light emitting portion according to an exemplary embodiment of the present disclosure. Figure 3 As shown, an organic light emitting diode (OLED) D1 according to the present disclosure includes a first electrode 210 and a second electrode 220 facing each other and a light emitting layer 230 disposed between the first electrode 210 and the second electrode 220. The organic light emitting display device 100 includes a red pixel region, a green pixel region, and a blue pixel region, and the OLED D1 may be disposed in the green pixel region.

[0135] In one exemplary embodiment, the light-emitting layer 230 includes a light-emitting material layer (EML) 340 disposed between the first electrode 210 and the second electrode 220. Furthermore, the light-emitting layer 230 may include at least one of a HTL 320 disposed between the first electrode 210 and the EML 340 and an ETL 360 disposed between the second electrode 220 and the EML 340. Furthermore, the light-emitting layer 230 may further include at least one of a HIL 310 disposed between the first electrode 210 and the HTL 320 and an EIL 370 disposed between the second electrode 220 and the ETL 360. Alternatively, the light-emitting layer 230 may further include a first exciton blocking layer, i.e., an EBL 330 disposed between the HTL 320 and the EML 340, and / or a second exciton blocking layer, i.e., an HBL 350 disposed between the EML 340 and the ETL 360.

[0136] The first electrode 210 may be an anode that provides holes to the EML 340. The first electrode 210 may include a conductive material having a relatively high work function value, for example, a transparent conductive oxide (TCO). In one exemplary embodiment, the first electrode 210 may include, but is not limited to, ITO, IZO, ITZO, SnO, ZnO, ICO, AZO, and / or the like.

[0137] The second electrode 220 may be a cathode that provides electrons to the EML 340. The second electrode 220 may include a conductive material having a relatively low work function value, i.e., a highly reflective material such as Al, Mg, Ca, Ag, and / or alloys thereof, and / or combinations thereof (such as Al-Mg).

[0138] The EML 340 includes a dopant 342 and a first host 344, and optionally a second host 346. A large amount of light emission may be generated at the dopant 342. The dopant 342 may be an organometallic compound that emits green light and may have a structure represented by Formula 1:

[0139] [Formula 1]

[0140] Ir(L A )m (L B ) n

[0141] Among them L A Having a structure represented by Formula 2; L B is an auxiliary ligand having a structure represented by Formula 3; m is 1, 2 or 3 and n is 0, 1 or 2, wherein m+n is 3;

[0142] [Formula 2]

[0143]

[0144] In formula 2,

[0145] X1 and X2 are each independently CR7 or N;

[0146] X3 to X5 are each independently CR8 or N, and at least one of X3 to X5 is CR8;

[0147] X6 to X9 are each independently CR9 or N, and at least one of X6 to X9 is CR9;

[0148] When two adjacent groups among R1 to R5, and / or

[0149] When b is an integer of 2 or greater, two adjacent R6, and / or

[0150] X3 and X4 or X4 and X5, and / or

[0151] X6 and X7, X7 and X8, or X8 and X9,

[0152] When no ring is formed,

[0153] R1 to R5 are each independently hydrogen, protium, deuterium, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkyl, undeuterated or deuterated unsubstituted or substituted C1-C 20 Heteroalkyl, undeuterated or deuterated unsubstituted or substituted C2-C 20 Alkenyl, undeuterated or deuterated unsubstituted or substituted C2-C 20 Heteroalkenyl, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkoxy, carboxyl, nitrile, isonitrile, sulfonamide, phosphine, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkylamino, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkylsilyl, undeuterated or deuterated unsubstituted or substituted C4-C 30 Alicyclic, undeuterated or deuterated unsubstituted or substituted C3-C 30Heteroalicyclic, undeuterated or deuterated unsubstituted or substituted C6-C 30 Aryl, or undeuterated or deuterated unsubstituted or substituted C3-C 30 heteroaryl, and wherein when b is 2, 3 or 4, each R6 is the same as or different from each other;

[0154] Optionally,

[0155] Two adjacent groups among R1 to R5, and / or

[0156] When b is 2, 3 or 4, two adjacent R6, and / or

[0157] X3 and X4 or X4 and X5, and / or

[0158] X6 and X7, or X7 and X8, or X8 and X9

[0159] further linked together directly or indirectly to form unsubstituted or substituted C4-C 20 Alicyclic, unsubstituted or substituted C3-C 20 Heteroalicyclic, unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic rings;

[0160] a is 0, 1, or 2;

[0161] b is 0, 1, 2, 3, or 4; and

[0162] a+b does not exceed 4,

[0163] [Formula 3]

[0164]

[0165] As used herein, the term "unsubstituted" refers to a hydrogen atom directly attached to a carbon atom. As used herein, "hydrogen" may refer to protium.

[0166] As used herein, "substituted" refers to the replacement of a hydrogen with a substituent. Substituents include, but are not limited to, deuterium, unsubstituted or deuterium or halogen-substituted C1-C 20 Alkyl, unsubstituted or deuterium or halogen substituted C1-C 20 Alkoxy, halogen, cyano, -CF3, hydroxyl, carboxyl, carbonyl, amino, C1-C 10 Alkylamino, C6-C 30 Arylamino, C3-C 30 Heteroarylamino, C6-C 30 Aryl, C3-C 30 Heteroaryl, nitro, hydrazine, sulfonate, C1-C 20 Alkylsilyl, C6-C30 Arylsilyl and C3-C 30 Heteroarylsilyl.

[0167] As used herein, the term "alkyl" refers to a branched or unbranched saturated hydrocarbon group having 1 to 20 carbon atoms, such as methyl, ethyl, or having 1 to 24 carbon atoms, such as methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, n-pentyl, isopentyl, sec-pentyl, neopentyl, hexyl, heptyl, octyl, nonyl, decyl, dodecyl, tetradecyl, hexadecyl, and the like.

[0168] As used herein, the term "alkenyl" is a hydrocarbon group of 2 to 20 carbon atoms containing at least one carbon-carbon double bond. An alkenyl group may be substituted with one or more substituents.

[0169] As used herein, the term "alicyclic group" or "cycloalkyl" refers to a non-aromatic carbon-based ring composed of at least three carbon atoms. Examples of alicyclic groups include, but are not limited to, cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, norbornyl, and the like. Alicyclic groups may be substituted with one or more substituents.

[0170] As used herein, the term "alkoxy" refers to a branched or unbranched alkyl group bonded through an ether linkage represented by the formula -O(-alkyl), wherein "alkyl" is as defined herein. Examples of alkoxy groups include methoxy, ethoxy, n-propoxy, isopropoxy, butoxy, and tert-butoxy, among others.

[0171] As used herein, the term "alkylamino" refers to a group represented by the formula -NH(-alkyl) or -N(-alkyl)2, wherein "alkyl" is as defined herein. Examples of alkylamino groups represented by the formula -NH(-alkyl) include, but are not limited to, methylamino, ethylamino, propylamino, isopropylamino, butylamino, isobutylamino, (sec-butyl)amino, (tert-butyl)amino, pentylamino, isopentylamino, (tert-pentyl)amino, hexylamino, and the like. Examples of alkylamino groups represented by the formula -N(-alkyl)2 include, but are not limited to, dimethylamino, diethylamino, dipropylamino, diisopropylamino, dibutylamino, diisobutylamino, di(sec-butyl)amino, di(tert-butyl)amino, dipentylamino, diisopentylamino, di(tert-pentyl)amino, dihexylamino, N-ethyl-N-methylamino, N-methyl-N-propylamino, N-ethyl-N-propylamino, and the like.

[0172] As used herein, the term "aromatic hydrocarbon" or "aryl" is well known in the art. The term includes monocyclic, monocyclic, or fused-ring polycyclic groups covalently linked to each other by bonds. Aromatic hydrocarbon groups can be unsubstituted or substituted. Examples of aromatic hydrocarbon or aryl groups include phenyl, 1-naphthyl, 2-naphthyl, 4-biphenyl, anthracenyl, and phenanthrenyl. Substituents of aromatic or aryl groups are as defined herein.

[0173] As used herein, the term "alkylsilyl" refers to any linear or branched, saturated or unsaturated acyclic alkyl group having 1 to 20 carbon atoms. Examples of alkylsilyl groups include trimethylsilyl, triethylsilyl, tert-butyldimethylsilyl, vinyldimethylsilyl, propyldimethylsilyl, triphenylsilyl, diphenylsilyl, and phenylsilyl.

[0174] As used herein, the term "halogen" refers to a fluorine, chlorine, bromine, or iodine atom.

[0175] As used herein, the term “hetero” in terms such as “heteroalkyl”, “heteroalkenyl”, “heteroalicyclic”, “heteroaromatic”, “heterocycloalkylene”, “heteroarylene”, “heteroarylalkylene”, “heteroaryl-o-xylyl”, “heterocycloalkyl”, “heteroaryl”, “heteroarylalkyl”, “heteroaryloxy”, “heteroarylamino” means that at least one carbon atom, for example, 1 to 5 carbon atoms, constituting an aliphatic chain, an alicyclic group or ring, or an aromatic group or ring is substituted with at least one heteroatom selected from the group consisting of N, O, S, and P.

[0176] As used herein, the term "heteroaromatic" or "heteroaryl" refers to a heterocycle comprising at least one heteroatom selected from N, O, and S in the ring, wherein the ring system is aromatic. The term includes monocyclic or fused-ring polycyclic groups covalently linked to each other by bonds. Heteroaromatic groups can be unsubstituted or substituted. Examples of heteroaromatic or heteroaryl groups include pyridyl, pyrrolyl, pyrazinyl, pyrimidinyl, thienyl (alternatively known as phenylthio), thiazolyl, furyl, imidazolyl, pyrazolyl, triazolyl, tetrazolyl, oxazolyl, oxadiazolyl, and thiadiazolyl.

[0177] As used herein, the term "heteroaryloxy" refers to a group represented by the formula -O-(heteroaryl), wherein "heteroaryl" is as defined herein.

[0178] In an exemplary embodiment, when R1 to R9 in Formula 2 are each independently C6-C 30 In the case of aryl, R1 to R9 can each independently be but not limited to C6-C 30 Aryl, C7-C 30 Arylalkyl, C6-C 30 Aryloxy and C6-C 30 As an example, when R1 to R9 are each independently C6-C 30In the case of an aryl group, each of R1 to R9 can independently be, but is not limited to, an unfused or fused aryl group, such as phenyl, biphenyl, terphenyl, naphthyl, anthracenyl, pentalenyl, indenyl, indeno-indenyl, heptalenyl, biphenylenyl, indacenyl, phenalenyl, phenanthrenyl, benzo-phenanthrenyl, dibenzo-phenanthrenyl, azulenyl, pyrenyl, fluoranthenyl, triphenylenyl, In some embodiments, two adjacent groups in R1 to R5 or two adjacent groups in R7 to R9 form an unfused or fused aryl group that may be substituted or unsubstituted.

[0179] Alternatively, when R1 to R9 in Formula 2 are each independently C3-C 30 In the case of heteroaryl, R1 to R9 can each independently be but not limited to C3-C 30 Heteroaryl, C4-C 30 Heteroarylalkyl, C3-C 30 Heteroaryloxy and C3-C 30 As an example, when R1 to R9 can each independently be C3-C 30In the case of heteroaryl, each of R1 to R9 may independently include, but is not limited to, unfused or fused heteroaryl, such as pyrrolyl, pyridyl, pyrimidinyl, pyrazinyl, pyridazinyl, triazinyl, tetrazinyl, imidazolyl, pyrazolyl, indolyl, isoindolyl, indazolyl, indolizinyl, pyrrolidinyl, carbazolyl, benzocarbazolyl, dibenzocarbazolyl, indolocarbazolyl, indenocarbazolyl, benzofuran-carbazolyl, benzothiophene-carbazolyl, carbolyl, quinolyl, isoquinolyl, phthalazinyl, quinoxalinyl, cinnamyl, quinazolinyl, quinolyl, purinyl, benzoquinolyl, benzoisoquinolyl, benzoquinazolinyl, benzoquinoxalinyl, acridinyl, phenazinyl, phenoxazinyl, phenothiazinyl, phenanthrolinyl, piperidinyl, phenanthridinyl, pteridinyl, naphthyridinyl, furanyl, pyranyl, oxazinyl, oxazolyl, oxadiazolyl, triazolyl, dioxanyl, benzofuranyl, dibenzofuranyl, thienyl, xanthene, chromenyl, isochromenyl, thiazinyl, thienyl, benzo-thienyl, dibenzothienyl, difurylpyrazinyl, benzofuranyl-dibenzofuranyl, benzothienyl-benzothienyl, benzothienyl-dibenzothienyl, benzothienyl-benzofuranyl, benzothienyl-dibenzofuranyl, xanthene-linked spiroacridinyl, at least one C1-C 10 Alkyl substituted dihydroacridinyl, and N-substituted spirofluorenyl. Unfused or fused aryl groups may be substituted or unsubstituted.

[0180] As an example, each of the aryl or heteroaryl groups of R1 to R9 can be composed of 1 to 3 aromatic rings or heteroaromatic rings. When the number of the aromatic or heteroaromatic rings of R1 to R9 becomes more than four, the conjugated structure in the whole molecule becomes too long. Therefore, the organometallic compound may have an overly narrow energy band gap. For example, each of the aryl or heteroaryl groups of R1 to R9 can independently include but is not limited to phenyl, biphenyl, naphthyl, anthracenyl, pyrrolyl, triazinyl, imidazolyl, pyrazolyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, furyl, benzofuranyl, dibenzofuranyl, thienyl, benzothienyl, dibenzothienyl, carbazolyl, acridinyl, carbolinyl, phenazinyl, phenoxazinyl or phenothiazinyl.

[0181] In an exemplary embodiment, the alkyl, heteroalkyl, alkenyl, heteroalkenyl, alkoxy, alkylamino, alkylsilyl, alicyclic, heteroalicyclic, aryl, and heteroaryl groups of R1 to R9 can each be independently unsubstituted or substituted with halogen, C1-C 10 Alkyl, C4-C 20 Alicyclic, C3-C 20 Heteroalicyclic, C6-C 20 Aryl and C3-C 20 In some embodiments, a C4-C5 group formed by two adjacent groups in R1 to R6, two adjacent R8, and / or two adjacent R9 is substituted by at least one of heteroaryl groups.20 Alicyclic, C3-C 20 Heteroalicyclic, C6-C 30 Aromatic ring and C3-C 30 Each of the heteroaromatic rings may independently be unsubstituted or substituted with at least one C1-C 10 Alkyl substitution.

[0182] Alternatively, two adjacent groups among R1 to R6, two adjacent R8, and two adjacent R9 may form an unsubstituted or substituted C4-C 30 Alicyclic (e.g., C5-C 10 Alicyclic), unsubstituted or substituted C3-C 30 Heteroalicyclic (e.g., C3-C 10 Heteroalicyclic), unsubstituted or substituted C6-C 30 Aromatic rings (e.g., C6-C 20 aromatic ring), or unsubstituted or substituted C3-C 30 Heteroaromatic rings (e.g., C3-C 20 The alicyclic ring, heteroalicyclic ring, aromatic ring and heteroaromatic ring formed by two adjacent groups among R1 to R6, two adjacent R8, and two adjacent R9 are not limited to specific rings. For example, the aromatic ring or heteroaromatic ring formed by these groups may include but is not limited to each of which is unsubstituted or replaced by at least one C1-C 10 Alkyl-substituted benzene ring, pyridine ring, indole ring, pyran ring, or fluorene ring. In some embodiments, the aromatic ring or heteroaromatic ring formed by two adjacent groups in R1 to R6, two adjacent R8, or two adjacent R9 can form an unsubstituted or substituted fused aromatic ring or heteroaromatic ring. The definitions of fused aromatic ring and fused heteroaromatic ring are the same as above.

[0183] The organometallic compound having a structure represented by Formula 1 has a heteroaryl ligand composed of at least five rings. The organometallic compound can have a rigid chemical conformation, which prevents its conformation from rotating during luminescence. Consequently, a good luminescence lifetime can be maintained. The organometallic compound can also have a specific photoluminescence emission range, thereby improving its color purity.

[0184] In one exemplary embodiment, each of m and n in Formula 1 may be 1 or 2. When the organometallic compound may be a heteroleptic metal complex including two different bidentate ligands coordinated to the central metal atom, the photoluminescence color purity and emission color of the organometallic compound may be easily controlled by combining the two different bidentate ligands. Furthermore, the color purity and emission peak of the organometallic compound may be controlled by introducing various substituents into each ligand. Alternatively, in Formula 1, m may be 3 and n may be 0. As an example, the organometallic compound having the structure represented by Formula 1 may emit green light and may improve the luminous efficiency of an organic light-emitting diode.

[0185] As an example, in Formula 2, X1 is CR7, X2 is CR7 or N, X3 to X5 are each independently CR8, and X6 to X9 are each independently CR9. That is, each of X1 and X3 to X9 can independently be an unsubstituted or substituted carbon atom.

[0186] In an exemplary embodiment, when a is 1 or 2, the phenyl group in Formula 2 may be connected to the meta position of the pyridine ring coordinated to the metal atom, and each of X1 and X3 to X9 in Formula 2 may independently be an unsubstituted or substituted carbon atom. A It may have the following structure represented by Formula 4A or Formula 4B:

[0187] [Formula 4A]

[0188]

[0189] [Formula 4B]

[0190]

[0191] Wherein, in Formula 4A and Formula 4B,

[0192] Each of R1 to R6 and b is as defined in Formula 2;

[0193] When d is an integer of 2 or greater, two adjacent R 13 , and / or

[0194] When e is an integer of 2 or greater, two adjacent R 14 ,

[0195] When no ring is formed,

[0196] R 11 to R 14 are each independently hydrogen, protium, deuterium, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkyl, undeuterated or deuterated unsubstituted or substituted C1-C 20 Heteroalkyl, undeuterated or deuterated unsubstituted or substituted C2-C 20 Alkenyl, undeuterated or deuterated unsubstituted or substituted C2-C 20 Heteroalkenyl, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkoxy, carboxyl, nitrile, isonitrile, sulfonamide, phosphine, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkylamino, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkylsilyl, undeuterated or deuterated unsubstituted or substituted C4-C 30Alicyclic, undeuterated or deuterated unsubstituted or substituted C3-C 30 Heteroalicyclic, undeuterated or deuterated unsubstituted or substituted C6-C 30 Aryl, or undeuterated or deuterated unsubstituted or substituted C3-C 30 heteroaryl;

[0197] Optionally,

[0198] When d is 2 or 3 and e is 2, 3 or 4,

[0199] When d is 2 or 3, two adjacent R 13 , and / or

[0200] When e is 2, 3 or 4, two adjacent R 14

[0201] further linked together directly or indirectly to form unsubstituted or substituted C4-C 20 Alicyclic, unsubstituted or substituted C3-C 20 Heteroalicyclic, unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic rings;

[0202] c is 0 or 1;

[0203] d is 0, 1, 2, or 3; and

[0204] e is 0, 1, 2, 3 or 4.

[0205] In another exemplary embodiment, when a is 1 or 2, the phenyl group in Formula 2 may be connected to the para position of the pyridine ring coordinated to the metal atom, and each of X1 and X3 to X9 in Formula 2 may independently be an unsubstituted or substituted carbon atom. A It may have the following structure represented by Formula 4C or Formula 4D:

[0206] [Formula 4C]

[0207]

[0208] [Formula 4D]

[0209]

[0210] Wherein in Formula 4C and Formula 4D,

[0211] Each of R1 to R6 and b is as defined in Formula 2;

[0212] When d is an integer of 2 or greater, two adjacent R 13 , and / or

[0213] When e is an integer of 2 or greater, two adjacent R 14 ,

[0214] When no ring is formed,

[0215] R 11 to R 14 are each independently hydrogen, protium, deuterium, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkyl, undeuterated or deuterated unsubstituted or substituted C1-C 20 Heteroalkyl, undeuterated or deuterated unsubstituted or substituted C2-C 20 Alkenyl, undeuterated or deuterated unsubstituted or substituted C2-C 20 Heteroalkenyl, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkoxy, carboxyl, nitrile, isonitrile, sulfonamide, phosphine, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkylamino, undeuterated or deuterated unsubstituted or substituted C1-C 20 Alkylsilyl, undeuterated or deuterated unsubstituted or substituted C4-C 30 Alicyclic, undeuterated or deuterated unsubstituted or substituted C3-C 30 Heteroalicyclic, undeuterated or deuterated unsubstituted or substituted C6-C 30 Aryl, or undeuterated or deuterated unsubstituted or substituted C3-C 30 heteroaryl;

[0216] Optionally,

[0217] When d is 2 or 3, two adjacent R 13 , and / or

[0218] When e is 2, 3 or 4, two adjacent R 14

[0219] further linked together directly or indirectly to form unsubstituted or substituted C4-C 20 Alicyclic, unsubstituted or substituted C3-C 20 Heteroalicyclic, unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic rings;

[0220] c is 0 or 1;

[0221] d is 0, 1, 2, or 3; and

[0222] e is 0, 1, 2, 3 or 4.

[0223] In an exemplary embodiment, R1 to R6 and R in Formulae 4A to 4D are 11 to R 14 Each of the alkyl, heteroalkyl, alkenyl, heteroalkenyl, alkoxy, alkylamino, alkylsilyl, alicyclic, heteroalicyclic, aryl and heteroaryl groups may independently be unsubstituted or substituted with deuterium, tritium, halogen, C1-C 10 Alkyl, C4-C 20 Alicyclic, C3-C 20 Heteroalicyclic, C6-C 20 Aryl and C3-C 20 In some embodiments, two adjacent groups among R1 to R6 in Formula 4A to Formula 4D, two adjacent R 13 and two adjacent R 14 The formed C4-C 20 Alicyclic, C3-C 20 Heteroalicyclic, C6-C 30 Aromatic ring and C3-C 30 Each of the heteroaromatic rings may independently be unsubstituted or substituted with at least one C1-C 10 Alkyl substitution.

[0224] In another exemplary embodiment, L as an auxiliary ligand B It can be a phenyl-pyridin-based ligand or an acetylacetonate-based ligand. As an example, L B It may have, but is not limited to, the structure represented by Formula 5A or Formula 5B below:

[0225] [Formula 5A]

[0226]

[0227] [Formula 5B]

[0228]

[0229] Wherein in Formula 5A and Formula 5B,

[0230] R 21 、R 22 and R 31 to R 33 are each independently hydrogen, protium, deuterium, unsubstituted or substituted C1-C 20 Alkyl, unsubstituted or substituted C1-C 20 Heteroalkyl, unsubstituted or substituted C2-C 20 Alkenyl, unsubstituted or substituted C2-C 20 Heteroalkenyl, unsubstituted or substituted C1-C 20 Alkoxy, carboxyl, nitrile, isonitrile, sulfonamide, phosphine, unsubstituted or substituted C1-C20 Alkylamino, unsubstituted or substituted C1-C 20 Alkylsilyl, unsubstituted or substituted C4-C 30 Alicyclic, unsubstituted or substituted C3-C 30 Heteroalicyclic, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl,

[0231] Optionally,

[0232] When f is 2, 3 or 4, two adjacent R 21 , and / or

[0233] When g is 2, 3 or 4, two adjacent R 22 , and / or

[0234] R 31 and R 32 , or R 32 and R 33

[0235] further linked together directly or indirectly to form unsubstituted or substituted C4-C 20 Alicyclic, unsubstituted or substituted C3-C 20 Heteroalicyclic, unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic ring; and

[0236] f and g are each 0, 1, 2, 3 or 4.

[0237] R 21 to R 22 and R 31 to R 33 Substituents or R 21 to R 22 、R 31 and R 32 , and / or R 32 and R 33 The formed ring may be the same as the substituent or ring described in Formula 2. In an exemplary embodiment, the organometallic compound having the structure represented by Formula 1 to Formula 5B may be selected from, but not limited to, the following organometallic compound represented by Formula 6:

[0238] [Formula 6]

[0239]

[0240]

[0241]

[0242]

[0243]

[0244]

[0245]

[0246]

[0247]

[0248]

[0249]

[0250]

[0251]

[0252]

[0253]

[0254]

[0255]

[0256]

[0257]

[0258] The organometallic compound having any one of the structures represented by Formula 4A to Formula 6 includes a heteroaryl ligand consisting of at least 5 rings, so it can have a rigid chemical conformation. The organometallic compound can improve its color purity and luminescence life because it can maintain a stable chemical conformation during the luminescence process. In addition, since the organometallic compound can be a metal complex with a bidentate ligand, the luminescent color purity and luminescent color can be easily controlled. Therefore, by applying the organometallic compound having the structure represented by Formula 1 to Formula 6 to the light-emitting layer, the organic light-emitting diode can have a beneficial luminous efficiency.

[0259] The first host 344 may be a p-type host having relatively favorable hole affinity characteristics. The first host 344 may be a fused heteroaryl organic compound having a structure represented by Formula 7 below:

[0260] [Formula 7]

[0261]

[0262] In formula 7,

[0263] X is CR 43 R 44 NR 43 、R 43 P=O, O or S;

[0264] Z1 to Z4 are each independently CR 45 or N;

[0265] R 41 to R 45 are each independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl,

[0266] Optionally, R 43 and R 44 further linked together directly or indirectly to form unsubstituted or substituted C6-C 30 Spiroaromatic ring, or unsubstituted or substituted C3-C 30 Spiroheteroaromatic ring,

[0267] Optionally, when p is 2, 3 or 4, two adjacent R 42 , and / or

[0268] Two adjacent R 45 Forming unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 heteroaromatic rings,

[0269] where R 41 to R 45 At least one of the C6-C 30 Aryl, unsubstituted or substituted C3-C 30 Heteroaryl, unsubstituted or substituted C6-C 30 Spiroaromatic ring, unsubstituted or substituted C3-C 30 Spiroheteroaromatic ring, unsubstituted or substituted C6-C 30 aromatic ring, and unsubstituted or substituted C3-C 30 At least one heteroaromatic ring, wherein when p is 2, 3 or 4, each R 42 Same or different from each other,

[0270] Optionally, C6-C 30 Aryl, C3-C 30 Heteroaryl, C6-C30 Spiroaromatic ring, C3-C 30 Spiroheteroaromatic ring, C6-C 30 Aromatic ring and C3-C 30 Each substituent on the heteroaromatic ring is independently unsubstituted or further substituted with a C1-C 10 Alkyl, C6-C 30 Aryl and C3-C 30 at least one substitution in a heteroaryl group;

[0271] L1 and L2 are each independently a single bond, an unsubstituted or substituted C6-C 30 Arylene, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Arylene and unsubstituted or substituted C3-C 30 The heteroaryl groups are each independently substituted with unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic ring forms a spiro structure,

[0272] Optionally, C6-C 30 Arylene and C3-C 30 Each substituent on the heteroaryl group is independently unsubstituted or further substituted with C1-C 10 Alkyl, C6-C 30 Aryl and C3-C 30 at least one substitution in a heteroaryl group; and

[0273] p is 0, 1, 2, 3 or 4.

[0274] In one exemplary aspect, R 41 to R 45 The aryl, heteroaryl, spiro aromatic ring, spiroheteroaromatic ring, aromatic ring and heteroaromatic ring represented by L1 and L2, and each of the arylene and heteroarylene groups represented by L1 and L2 may be independently unsubstituted or replaced by C1-C 10 Alkyl, C6-C 30 Aryl and C3-C 30 At least one of the heteroaryl groups is substituted. 41 -R 45 Each of the aryl and heteroaryl groups of the substituents on L1 and L2 may be independently unsubstituted or replaced by C1-C 10 Alkyl, C6-C 30 Aryl and C3-C 30 At least one of the heteroaryl groups is further substituted.

[0275] As an example, each of Z1 to Z4 in Formula 7 can independently be CR 45In this case, the core of the organic compound having the structure of Formula 7 includes a carbazole moiety. Alternatively, three of Z1 to Z4 in Formula 7 may independently be CR 45 , and another one of Z1 to Z4 in Formula 7 may be N. In this case, the core of the organic compound having the structure of Formula 7 includes a carboline moiety. 41 to R 45 The aryl group and heteroaryl group of each of may be the same as the aryl group and heteroaryl group described in Formula 2.

[0276] In one exemplary embodiment, R in Formula 7 41 to R 45 At least one of, for example, R 41 、R 42 and R 45 At least one of the alkyl radicals may be a carbazolyl group, a carbolyl group, an acridinyl group, an acridoyl group, a phenazinyl group, a phenoxazinyl group, a phenothiazinyl group, a dibenzofuranyl group and / or a dibenzothiophenyl group, each of which may be independently unsubstituted or substituted with an unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, and unsubstituted or substituted C3-C 30 More specifically, each of the carbazolyl, carbolyl, acridinyl, acridoyl, phenazinyl, phenoxazinyl, phenothiazinyl, dibenzofuranyl and / or dibenzothiophenyl groups may independently be unsubstituted or substituted with at least one of phenyl, indolocarbazolyl and indenocarbazolyl, each of which may be unsubstituted or substituted with an unsubstituted or unsubstituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, and unsubstituted or substituted C3-C 30 At least one of the heteroaryl groups is substituted. For example, 42 and R 45 Each of the aryl and heteroaryl groups of each of can be independently attached to, but not limited to, the 3-position of the carbazole and carboline moieties of the core.

[0277] In another exemplary embodiment, R 42 Two adjacent groups and / or two adjacent R 45 Each of the aromatic rings and heteroaromatic rings formed may independently include, but are not limited to, a benzene ring, a pyridine ring, an indene ring, an indole ring, and a fluorene ring, each of which may independently be unsubstituted or substituted with an unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, and unsubstituted or substituted C3-C 30For example, each of the aromatic and heteroaromatic rings can be independently formed by, but not limited to, substituents at the 2- and 3-positions of the carbazole or carboline moiety of the core.

[0278] In yet another exemplary embodiment, X in Formula 7 may be CR 43 R 44 , O or S. For example, the organic compound having the structure of Formula 7 may have, but is not limited to, an indenocarbazole core, an indenocarboline core, a benzofuran-carbazole core, a benzofuran-carboline core, a benzothiophene-carbazole core or a benzothiophene-carboline core.

[0279] Alternatively, when R in Equation 7 43 and R 44 When forming a spiral structure, R 43 and R 44 It may have, but is not limited to, a spirofluorene ring, an indenofluorene ring, and an indolefluorene ring, each of which may be unsubstituted or substituted with an unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, and unsubstituted or substituted C3-C 30 At least one substitution in the heteroaryl group.

[0280] More specifically, the first body 344 may include at least one of the following organic compounds represented by Formula 8, or may be selected from, but not limited to, the following organic compounds represented by Formula 8:

[0281] [Formula 8]

[0282]

[0283]

[0284]

[0285] The EML 340 may further include a second body 346 and the first body 344. The second body 346 may be an n-type body having relatively favorable electron affinity. The second body 346 may include an azine-based organic compound having a structure represented by Formula 9 below:

[0286] [Formula 9]

[0287]

[0288] In formula 9,

[0289] R 51 to R 53 Each is independently unsubstituted or substituted C6-C 30 Aryl or unsubstituted or substituted C3-C30 Heteroaryl, where R 51 to R 53 At least one of has a structure represented by Formula 10A or Formula 10B;

[0290] Y1, Y2 and Y3 are each independently CR 54 or N, wherein at least one of Y1, Y2 and Y3 is N;

[0291] R 54 are independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each independently unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure; and

[0292] L is a single bond, unsubstituted or substituted C6-C 30 Arylene, or unsubstituted or substituted C3-C 30 Heteroaryl; optionally, unsubstituted or substituted C6-C 30 Arylene and unsubstituted or substituted C3-C 30 The heteroaryl groups are each independently substituted with unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic ring forms a spiro structure,

[0293] Formula 10A is:

[0294] [Formula 10A]

[0295]

[0296] Wherein in Formula 10A,

[0297] The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9;

[0298] R 61 to R 68 are independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30Heteroaryl groups are each independently unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure; and

[0299] Optionally,

[0300] R 61 to R 68 At least two adjacent groups in the group are further directly or indirectly linked together to form an unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 Heteroaromatic ring, optionally unsubstituted or substituted C6-C 30 Aromatic ring and unsubstituted or substituted C3-C 30 The heteroaromatic rings are each independently connected to an unsubstituted or substituted C6-C 20 aromatic ring, or unsubstituted or substituted C3-C 20 The heteroaromatic ring forms a spiro structure,

[0301] Formula 10B is:

[0302] [Formula 10B]

[0303]

[0304] Wherein in Formula 10B,

[0305] The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9;

[0306] R 71 is hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30 Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure;

[0307] R 72 to R 78 are each independently hydrogen, protium, deuterium, tritium, unsubstituted or substituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, optionally unsubstituted or substituted C6-C 30Aryl and unsubstituted or substituted C3-C 30 Heteroaryl groups are each unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 The heteroaromatic rings form a spiro structure; and

[0308] Optionally,

[0309] R 72 to R 78 At least two adjacent groups in the group are further directly or indirectly linked together to form an unsubstituted or substituted C6-C 30 aromatic ring, or unsubstituted or substituted C3-C 30 Heteroaromatic ring, optionally unsubstituted or substituted C6-C 30 Aromatic ring and unsubstituted or substituted C3-C 30 The heteroaromatic rings are each independently connected to an unsubstituted or substituted C6-C 20 aromatic ring, or unsubstituted or substituted C3-C 20 The heteroaromatic rings form a spiro structure.

[0310] In an exemplary embodiment, R 51 to R 54 、R 61 to R 68 、R 71 to R 78 Each of the aryl and heteroaryl groups of L, and / or each of the arylene and heteroarylene groups of L may be independently unsubstituted or replaced by C1-C 10 Alkyl, C1-C 10 Alkylsilyl, C6-C 20 Arylsilyl, C6-C 20 Aryl and C3-C 20 At least one of the heteroaryl groups is substituted, or with C6-C 20 Aromatic ring or C3-C 20 The heteroaromatic rings form a spiro structure.

[0311] As an example, the azine moiety or L in Formula 9 as the second host 346 may be connected to, but is not limited to, the 3-position of the carbazole moiety in Formula 10A and / or Formula 10B. For example, two groups at positions 2 and 3 and / or positions 6 and 7 of the carbazole moiety in Formulas 10A and 10B may form an aromatic ring and / or a heteroaromatic ring, but are not limited thereto.

[0312] In some embodiments, R in Formula 10A and Formula 10B 61 to R 68 and / or R 72 to R 78The aromatic ring or heteroaromatic ring formed by two adjacent groups in the group may include, but is not limited to, a benzene ring, a naphthalene ring, an anthracene ring, a pyridine ring, a furan ring, a thiophene ring, an indene ring, an indole ring, a benzofuran ring, and a benzothiophene ring, each of which may be independently unsubstituted or replaced by C1-C 10 Alkyl, C6-C 20 Aryl and C3-C 20 At least one of the heteroaryl groups is substituted. As examples, such aromatic rings or heteroaromatic rings may include an indene ring, an indole ring, a benzofuran ring, and a benzothiophene ring, each of which may be unsubstituted or substituted with these groups.

[0313] R in Formula 10B 71 It may include, but is not limited to, phenyl groups that are unsubstituted or substituted with at least one phenyl group.

[0314] In one exemplary embodiment, R in Formula 9 53 It can have formula 10A or formula 10B. Alternatively, R in formula 9 51 and / or R 52 It may have Formula 10A or Formula 10B.

[0315] R in Formula 9 51 to R 53 The aryl group and heteroaryl group not having the structure represented by Formula 10A or Formula 10B may include the aryl group and heteroaryl group described in Formula 2. For example, R not having the structure represented by Formula 10A or Formula 10B 51 to R 53 Each of them may independently include phenyl, naphthyl, pyridyl and carbazolyl, each of which may be unsubstituted or replaced by C1-C 10 Alkyl, C6-C 20 Aryl and C3-C 20 At least one heteroaryl group is substituted.

[0316] The arylene and heteroarylene groups in Formula 9 may include divalent bridging groups corresponding to the aryl and heteroaryl groups described in Formula 2. For example, the arylene and heteroarylene groups may include, but are not limited to, phenylene, naphthylene, and pyridylene groups, each of which may be independently unsubstituted or substituted with at least one aryl group such as phenyl, naphthyl, anthracenyl, and phenanthrenyl. In an exemplary embodiment, the second host 346 may be selected from, but not limited to, an organic compound represented by the following Formula 11:

[0317] [Equation 11]

[0318]

[0319]

[0320]

[0321]

[0322] The content of the host including the first host 344 and the second host 346 in the EML 340 may be, but is not limited to, approximately 50 wt% to approximately 90 wt%, such as approximately 80 wt% to approximately 95 wt%, based on the total weight of the components in the EML 340. The content of the dopant 342 in the EML 340 may be, but is not limited to, approximately 1 wt% to 10 wt%, such as approximately 5 wt% to 20 wt%, based on the total weight of the components in the EML 340. When the EML 340 includes the first host 344 and the second host 346, the first host 344 and the second host 346 may be mixed, but is not limited to, having a weight ratio between approximately 4:1 and approximately 1:4, such as a weight ratio between approximately 3:1 and approximately 1:3. As an example, the EML 340 may have a thickness of, but is not limited to, approximately 100 nm to approximately 500 nm.

[0323] The HIL 310 is disposed between the first electrode 210 and the HTL 320 and may improve the interface properties between the inorganic first electrode 210 and the organic HTL 320. In one exemplary embodiment, the HIL 310 may include, but is not limited to: 4,4',4"-tris(3-methylphenylamino)triphenylamine (MTDATA), 4,4',4"-tris(N,N-diphenyl-amino)triphenylamine (NATA), 4,4',4"-tris(N-(naphthalen-1-yl)-N-phenyl-amino)triphenylamine (1T-NATA), 4,4',4"-tris(N-(naphthalen-2-yl)-N-phenyl-amino)triphenylamine (2T-NATA), copper phthalocyanine (CuPc), tris(4-carbazol-9-yl-phenyl)amine (TCTA), N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4"-diamine (NPB; NPD), 1,4,5,8,9,11-hexaazatriphenylamine hexacarbonitrile (dipyrazino[2,3-f:2'3'-h]quinoxaline-2,3,6,7,10,11-hexacarbonitrile; HAT-CN), 1,3,5-tris[4-(diphenylamino)phenyl]benzene (TDAPB), poly(3,4-ethylenedioxythiophene)polystyrenesulfonate (PEDOT / PSS), 2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane (F4TCNQ), N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, N,N'-diphenyl-N,N'-bis[4-(N,N'-diphenylamino)phenyl]benzidine (NPNPB), and / or combinations thereof.

[0324] As an example, the HIL 310 may have a thickness of, but is not limited to, about 50 nm to about 150 nm. Depending on the characteristics of the OLED D1, the HIL 310 may be omitted.

[0325] The HTL 320 is disposed adjacent to the EML 340 between the first electrode 210 and the EML 340. In one exemplary embodiment, the HTL 320 may include, but is not limited to: N,N'-diphenyl-N,N'-bis(3-methylphenyl)-1,1'-biphenyl-4,4'-diamine (TPD), NPB (NPD), N,N'-bis[4-[bis(3-methylphenyl)amino]phenyl]-N,N'-diphenyl-[1,1'-biphenyl]-4,4'-diamine (DNTPD), 4,4'-bis(N-carbazolyl)-1,1'-biphenyl (CBP), poly[N,N'-bis(4-tert-butyl)-N,N'-bis(phenyl)-biphenyl diamine] (Poly-TPD), poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4'-(N-(4-secondary butylphenyl)diphenylamine))] (TFB), 1, 1-bis(4-(N,N'-di(p-tolyl)amino)phenyl)cyclohexane (TAPC), 3,5-bis(9H-carbazol-9-yl)-N,N-diphenylaniline (DCDPA), N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, N-(biphenyl-4-yl)-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)biphenyl-4-amine, N-([1,1'-biphenyl]-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, a spiro-fluorene compound having a structure represented by the following Formula 12, and / or a combination thereof:

[0326] [Equation 12]

[0327]

[0328] The ETL 360 and the EIL 370 may be sequentially laminated between the EML 340 and the second electrode 220. The ETL 360 includes a material having high electron mobility, and thus may stably provide electrons to the EML 340 through rapid electron transport.

[0329] In an exemplary embodiment, the ETL 360 may include, but is not limited to, at least one of the following compounds: oxadiazole compounds, triazole compounds, phenanthroline compounds, benzoxazole compounds, benzothiazole compounds, benzimidazole compounds, triazine compounds, and / or the like.

[0330] As an example, ETL 360 may include, but is not limited to, tris-(8-hydroxyquinolinol)aluminum (Alq3), bis(2-methyl-8-quinolinol-N1,O8)-(1,1'-biphenyl-4-phenol)aluminum (BAlq), lithium quinolate (Liq), 2-biphenyl-4-yl-5-(4-tert-butylphenyl)-1,3,4-oxadiazole (PBD), spiro-PBD, 1,3,5-tris(N-phenylbenzimidazol-2-yl)benzene (TPBi), 4,7-diphenyl-1,10-phenanthroline (Bphen), 2,9-bis(naphthalen-2-yl)4,7-diphenyl-1,10-phenanthroline (NBphen), 2,9-dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP), 3-(4-biphenyl)-4-phenyl-5-tert-butylphenyl-1,2,4-triazole (TAZ) ), 4-(naphthalene-1-yl)-3,5-diphenyl-4H-1,2,4-triazole (NTAZ), 1,3,5-tris(p-pyridin-3-yl-phenyl)benzene (TpPyPB), 2,4,6-tris(3'-(pyridin-3-yl)biphenyl-3-yl)1,3,5-triazine (TmPPPyTz), poly[9,9-bis(3'-(N,N-dimethyl)-N-ethylammonium )-propyl)-2,7-fluorene]-alt-2,7-(9,9-dioctylfluorene)] (PFNBr), tris(phenylquinoxaline) (TPQ), diphenyl-4-triphenylsilyl-phenylphosphine oxide (TSPO1), 2-[4-(9,10-di-2-naphthalen-2-yl-2-anthracen-2-yl)phenyl]1-phenyl-1H-benzimidazole (ZADN), and / or combinations thereof.

[0331] The EIL 370 is disposed between the second electrode 220 and the ETL 360 and can improve the physical properties of the second electrode 220, thereby enhancing the lifespan of the OLED D1. In one exemplary embodiment, the EIL 370 may include, but is not limited to, alkali metal halides or alkaline earth metal halides such as LiF, CsF, NaF, BaF2, and / or the like, and / or organometallic compounds such as Liq, lithium benzoate, lithium stearate, and / or the like. Each of the ETL 360 and the EIL 370 can independently have a thickness of, but is not limited to, approximately 100 nm to approximately 400 nm. Alternatively, the EIL 370 may be omitted.

[0332] In an alternative aspect, the electron transport material and the electron injection material can be mixed to form a single ETL-EIL. The electron transport material and the electron injection material can be mixed, but are not limited to, in a weight ratio of about 4:1 to about 1:4, such as about 2:1 to about 1:2.

[0333] When holes are transferred to the second electrode 220 via the EML 340 and / or electrons are transferred to the first electrode 210 via the EML 340, the OLED D1 may have a short lifespan and reduced luminous efficiency. To prevent or reduce these phenomena, the OLED D1 according to this aspect of the present disclosure may have at least one exciton blocking layer adjacent to the EML 340.

[0334] For example, the OLED D1 may include an EBL 330 between the HTL 320 and the EML 340 to control, prevent, or reduce electron transfer. In one exemplary embodiment, the EBL 330 may include, but is not limited to, TCTA, tris[4-(diethylamino)phenyl]amine, N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, TAPC, MTDATA, 1,3-bis(carbazol-9-yl)benzene (mCP), 3,3'-bis(N-carbazolyl)-1,1'-biphenyl (mCBP), CuPc, DNTPD, TDAPB, DCDPA, 2,8-bis(9-phenyl-9H-carbazol-3-yl)dibenzo[b,d]thiophene, and / or combinations thereof.

[0335] In addition, the OLED D1 may further include an HBL 350 as a second exciton blocking layer between the EML 340 and the ETL 360 so that holes cannot be transferred from the EML 340 to the ETL 360. In one exemplary embodiment, the HBL 350 may include, but is not limited to, at least one of oxadiazole-based compounds, triazole-based compounds, phenanthroline-based compounds, benzoxazole-based compounds, benzothiazole-based compounds, benzimidazole-based compounds, and triazine-based compounds, each of which can be used in the ETL 360.

[0336] For example, the HBL 350 may include a compound having a relatively low HOMO energy level compared to the light-emitting material in the EML 340. The HBL 350 may include, but is not limited to, Alq3, BAlq, Liq, PBD, spiro-PBD, BCP, bis-4,5-(3,5-di-3-pyridylphenyl)-2-methylpyrimidine (B3PYMPM), bis[2-(diphenylphosphino)phenyl]ether oxide (DPEPO), 9-(6-(9H-carbazol-9-yl)pyridin-3-yl)-9H-3,9'-biscarbazole, TSPO1, and / or combinations thereof.

[0337] Since the organometallic compounds having structures represented by Formulas 1 to 6 have a rigid chemical conformation, they can maintain a stable chemical conformation during luminescence, exhibiting beneficial color purity and luminescence lifetime. Changing the structure of the bidentate ligand and the substituents of the ligand allows the organometallic compound to control its luminescent color.

[0338] In addition, the EML 340 may further include a first host 344 having favorable hole transport properties and a second host 346 having favorable electron transport properties. Since charges and exciton energy are quickly transferred from the first host 344 of the fused heteroaryl compound having at least one nitrogen atom and the second host 346 of the azine-based compound to the dopant 342, the OLED D1 can reduce its driving voltage and improve its luminous efficiency and luminous lifetime.

[0339] In the above exemplary embodiment, the OLED and the organic light emitting display device include a single light emitting portion emitting green. Alternatively, the OLED may include a plurality of light emitting portions (see Figure 5 and Figure 6 ), at least one of which includes a dopant 342, a first host 344 and an optional second host 346.

[0340] In another exemplary embodiment, the organic light emitting display device may realize full colors including white. Figure 4 A schematic cross-sectional view illustrating an organic light emitting display device according to another exemplary embodiment of the present disclosure is shown.

[0341] like Figure 4 As shown, the organic light-emitting display device 400 includes a first substrate 402 that defines each of a red pixel region RP, a green pixel region GP, ​​and a blue pixel region BP, a second substrate 404 facing the first substrate 402, a thin film transistor Tr located on the first substrate 402, an OLED D disposed between the first substrate 402 and the second substrate 404 and emitting white (W) light, and a color filter layer 480 disposed between the OLED D and the second substrate 404.

[0342] Each of the first substrate 402 and the second substrate 404 may include, but is not limited to, glass, flexible materials, and / or polymer plastics. For example, each of the first substrate 402 and the second substrate 404 may be made of PI, PES, PEN, PET, PC, and / or a combination thereof. The first substrate 402 on which the thin film transistors Tr and the OLED D are arranged forms an array substrate.

[0343] A buffer layer 406 may be provided on the first substrate 402. A thin film transistor Tr is provided on the buffer layer 406, corresponding to each of the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP. The buffer layer 406 may be omitted.

[0344] The semiconductor layer 410 is provided on the buffer layer 406. The semiconductor layer 410 may be made of an oxide semiconductor material or polysilicon or may include an oxide semiconductor material or polysilicon.

[0345] The gate insulating layer 420 is provided on the semiconductor layer 410. The gate insulating layer 420 includes an insulating material, for example, an inorganic insulating material such as silicon oxide (SiO x , where 0 < x ≤ 2) or silicon nitride (SiN x , where 0 < x ≤ 2).

[0346] The gate 430 made of a conductive material such as metal is provided on the gate insulating layer 420 so as to correspond to the center of the semiconductor layer 410. The interlayer insulating layer 440 is provided on the gate 430. The interlayer insulating layer 440 includes an insulating material, for example, an inorganic insulating material such as SiO x or SiN x , or an organic insulating material such as benzocyclobutene or photo-acryl.

[0347] The interlayer insulating layer 440 has a first semiconductor layer contact hole 442 and a second semiconductor layer contact hole 444 that expose or do not cover a part of the surface closer to the opposite end than the center of the semiconductor layer 410. The first semiconductor layer contact hole 442 and the second semiconductor layer contact hole 444 are provided on opposite sides of the gate 430 and are spaced apart from the gate 430.

[0348] The source electrode 452 and the drain electrode 454 made of a conductive material such as metal or including a conductive material such as metal are provided on the interlayer insulating layer 440. The source electrode 452 and the drain electrode 454 are spaced apart from each other with respect to the gate 430. The source electrode 452 and the drain electrode 454 contact both sides of the semiconductor layer 410 through the first semiconductor layer contact hole 442 and the second semiconductor layer contact hole 444, respectively.

[0349] The semiconductor layer 410, the gate 430, the source electrode 452, and the drain electrode 454 constitute a thin film transistor Tr serving as a driving element.

[0350] Although Figure 4 not shown in, the gate line GL and the data line DL that cross each other to define the pixel region P, and the switching element Ts connected to the gate line GL and the data line DL may be further formed in the pixel region P. The switching element Ts is connected to the thin film transistor Tr serving as a driving element. In addition, the power supply line PL is spaced apart in parallel from the gate line GL or the data line DL, and the thin film transistor Tr may further include a storage capacitor Cst configured to constantly hold the voltage of the gate 430 within one frame.

[0351] The passivation layer 460 is disposed on the source electrode 452 and the drain electrode 454, covering the entire thin film transistor Tr on the first substrate 402. The passivation layer 460 has a drain contact hole 462 that exposes or does not cover the drain electrode 454 of the thin film transistor Tr.

[0352] The OLED D is positioned on the passivation layer 460 , and includes a first electrode 510 connected to the drain electrode 454 of the thin film transistor Tr, a second electrode 520 facing the first electrode 510 , and a light emitting layer 530 disposed between the first and second electrodes 510 and 520 .

[0353] The first electrode 510 formed for each pixel region RP, GP, or BP may be an anode and may include a conductive material having a relatively high work function value. For example, the first electrode 510 may include, but is not limited to, ITO, IZO, ITZO, SnO, ZnO, ICO, AZO, and / or the like. Alternatively, a reflective electrode or reflective layer may be disposed below the first electrode 510. For example, the reflective electrode or reflective layer may include, but is not limited to, Ag or an APC alloy.

[0354] The bank layer 464 is disposed on the passivation layer 460 so as to cover the edge of the first electrode 510. The bank layer 464 exposes or does not cover the center of the first electrode 510 corresponding to each of the red pixel RP, the green pixel GP, and the blue pixel BP. The bank layer 464 may be omitted.

[0355] The light emitting layer 530, which may include a light emitting portion, is disposed on the first electrode 510. Figure 5 and Figure 6 As shown, the light emitting layer 530 may include a plurality of light emitting portions 600, 700, 700' and 800 and at least one charge generation layer 680 and 780. Each of the light emitting portions 600, 700, 700' and 800 includes at least one light emitting material layer and may further include a HIL, HTL, EBL, HBL, ETL and / or EIL.

[0356] The second electrode 520 may be disposed on the substrate 402 over which the light emitting layer 530 may be disposed. The second electrode 520 may be disposed over the entire display area and may include a conductive material having a relatively low work function value compared to the first electrode 510, and may be a cathode. For example, the second electrode 520 may include, but is not limited to, Al, Mg, Ca, Ag, alloys thereof, and / or combinations thereof, such as Al-Mg.

[0357] Since in the organic light emitting display device 400 according to the second embodiment of the present disclosure, light emitted from the light emitting layer 530 is incident on the color filter layer 480 through the second electrode 520 , the second electrode 520 has a thin thickness so that the light can be transmitted.

[0358] The color filter layer 480 is disposed on the OLED D and includes a red color filter pattern 482, a green color filter pattern 484, and a blue color filter pattern 486, each of which is disposed corresponding to a red pixel RP, a green pixel GP, and a blue pixel BP, respectively. Figure 4 Not shown in FIG, the color filter layer 480 may be attached to the OLED D through an adhesive layer. Alternatively, the color filter layer 480 may be directly disposed on the OLED D.

[0359] In addition, an encapsulation film may be provided on the second electrode 520 to prevent or reduce external moisture from penetrating into the OLED D. The encapsulation film may have, but is not limited to, a laminated structure including a first inorganic insulating film, an organic insulating film, and a second inorganic insulating film ( Figure 2 176 in). In addition, a polarizing plate can be attached to the second substrate 404 to reduce reflection of external light. For example, the polarizing plate can be a circular polarizing plate.

[0360] exist Figure 4 In the embodiment of the present invention, light emitted from the OLED D is transmitted through the second electrode 520, and the color filter layer 480 is provided on the OLED D. Alternatively, light emitted from the OLED D is transmitted through the first electrode 510, and the color filter layer 480 can be provided between the OLED D and the first substrate 402. In addition, a color conversion layer can be formed or provided between the OLED D and the color filter layer 480. The color conversion layer may include a red conversion layer, a green conversion layer, and a blue conversion layer, which are provided for each pixel (RP, GP, and BP) to convert white (W) light into each of red, green, and blue light, respectively. Alternatively, the organic light-emitting display device 400 may include a color conversion film instead of the color filter layer 480.

[0361] As described above, white (W) light emitted from the OLED D is transmitted through the red filter pattern 482, the green filter pattern 484, and the blue filter pattern 486, each of which is arranged corresponding to the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP, respectively, so that red light, green light, and blue light are displayed in the red pixel region RP, the green pixel region GP, ​​and the blue pixel region BP, respectively.

[0362] Figure 5 FIG. 1 shows a schematic cross-sectional view of an organic light emitting diode having a series structure of two light emitting portions. Figure 5As shown, the OLED D2 according to an exemplary embodiment of the present disclosure includes a first electrode 510 and a second electrode 520, and a light-emitting layer 530 disposed between the first electrode 510 and the second electrode 520. The light-emitting layer 530 includes a first light-emitting portion 600 disposed between the first electrode 510 and the second electrode 520, a second light-emitting portion 700 disposed between the first light-emitting portion 600 and the second electrode 520, and a charge generation layer (CGL) 680 disposed between the first light-emitting portion 600 and the second light-emitting portion 700.

[0363] The first electrode 510 may be an anode and may include a conductive material having a relatively high work function value, such as TCO. For example, the first electrode 510 may include, but is not limited to, ITO, IZO, ITZO, SnO, ZnO, ICO, AZO, and / or the like. The second electrode 520 may be a cathode and may include a conductive material having a relatively low work function value. For example, the second electrode 520 may include, but is not limited to, Al, Mg, Ca, Ag, alloys thereof, and / or combinations thereof, such as Al-Mg.

[0364] The first light-emitting portion 600 includes a first EML (EML1) 640. The first light-emitting portion 600 may further include at least one of a HIL 610 disposed between the first electrode 510 and the EML1 640, a first HTL (HTL1) 620 disposed between the HIL 610 and the EML1 640, and a first ETL (ETL1) 660 disposed between the EML1 640 and the CGL 680. Alternatively, the first light-emitting portion 600 may further include a first EBL (EBL1) 630 disposed between the HTL1 620 and the EML1 640, and / or a first HBL (HBL1) 650 disposed between the EML1 640 and the ETL1 660.

[0365] The second light-emitting portion 700 includes a second EML (EML2) 740. The second light-emitting portion 700 may further include at least one of a second HTL (HTL2) 720 disposed between the CGL 680 and the EML2 740, a second ETL (ETL2) 760 disposed between the second electrode 520 and the EML2 740, and an EIL 770 disposed between the second electrode 520 and the ETL2 760. Alternatively, the second light-emitting portion 700 may further include a second EBL (EBL2) 730 disposed between the HTL2 720 and the EML2 740, and / or a second HBL (HBL2) 750 disposed between the EML2 740 and the ETL2 760.

[0366] At least one of EML1 640 and EML2 740 may include a dopant 742, a first host 744, and / or a second host 746 to emit green or yellow-green. The other of EML1 640 and EML2 740 may emit blue, so that OLED D2 may achieve white (W) emission. Hereinafter, OLED D2 in which EML2 740 emits green or yellow-green will be described in detail.

[0367] The HIL 610 is disposed between the first electrode 510 and the HTL1 620 and can improve the interface characteristics between the inorganic first electrode 510 and the organic HTL1 620. In one exemplary embodiment, the HIL 610 may include, but is not limited to, MTDATA, NATA, 1T-NATA, 2T-NATA, CuPc, TCTA, NPB (NPD), HAT-CN, TDAPB, PEDOT / PSS, F4TCNQ, N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, NPNPB, and / or a combination thereof. Depending on the characteristics of the OLED D2, the HIL 610 may be omitted.

[0368] Each of HTL1 620 and HTL2 720 may include, but is not limited to, TPD, NPB (NPD), DNTPD, CBP, Poly-TPD, TFB, TAPC, DCDPA, N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, N-(biphenyl-4-yl)-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)biphenyl-4-amine, N-([1,1'-biphenyl]-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, a spiro-fluorene compound represented by Formula 12, and / or combinations thereof.

[0369] Each of ETL1 660 and ETL2 760 facilitates electron transport in each of the first light-emitting portion 600 and the second light-emitting portion 700. For example, each of ETL1 660 and ETL2 760 may independently include, but is not limited to, at least one of an oxadiazole compound, a triazole compound, a phenanthroline compound, a benzoxazole compound, a benzothiazole compound, a benzimidazole compound, a triazine compound, and / or the like. For example, each of ETL1 660 and ETL2 770 may independently include, but is not limited to, Alq3, BAlq, Liq, PBD, spiro-PBD, TPBi, Bphen, NBphen, BCP, TAZ, NTAZ, TpPyPB, TmPPPyTz, PFNBr, TPQ, TSPO1, ZADN, and / or combinations thereof.

[0370] The EIL 770 is disposed between the second electrode 520 and the ETL2 760 and can improve the physical properties of the second electrode 520, thereby increasing the lifespan of the OLED D2. In one exemplary embodiment, the EIL 770 may include, but is not limited to, alkali metal halides or alkaline earth metal halides such as LiF, CsF, NaF, BaF2, and / or the like, and / or organometallic compounds such as Liq, lithium benzoate, lithium stearate, and / or the like.

[0371] Each of EBL1 630 and EBL2 730 may independently include, but is not limited to, TCTA, tris[4-(diethylamino)phenyl]amine, N-(biphenyl-4-yl)-9,9-dimethyl-N-(4-(9-phenyl-9H-carbazol-3-yl)phenyl)-9H-fluoren-2-amine, TAPC, MTDATA, mCP, mCBP, CuPc, DNTPD, TDAPB, DCDPA, 2,8-bis(9-phenyl-9H-carbazol-3-yl)dibenzo[b,d]thiophene, and / or combinations thereof.

[0372] Each of HBL1 650 and HBL2 750 may include, but is not limited to, at least one of oxadiazole compounds, triazole compounds, phenanthroline compounds, benzoxazole compounds, benzothiazole compounds, benzimidazole compounds, and triazine compounds, each of which may be used in ETL1 660 and ETL2 760. For example, each of HBL1 650 and HBL2 750 may each independently include, but is not limited to, Alq3, BAlq, Liq, PBD, spiro-PBD, BCP, B3PYMPM, DPEPO, 9-(6-(9H-carbazol-9-yl)pyridin-3-yl)-9H-3,9′-biscarbazole, TSPO1, and / or combinations thereof.

[0373] The CGL 680 is disposed between the first light-emitting portion 600 and the second light-emitting portion 700. The CGL 680 includes an N-type CGL (N-CGL) 685 disposed adjacent to the first light-emitting portion 600 and a P-type CGL (P-CGL) 690 disposed adjacent to the second light-emitting portion 700. The N-CGL 685 injects electrons into the EML1 640 of the first light-emitting portion 600, and the P-CGL 690 injects holes into the EML2 740 of the second light-emitting portion 700.

[0374] N-CGL 685 may be an organic layer doped with alkali metals such as Li, Na, K, and Cs and / or alkaline earth metals such as Mg, Sr, Ba, and Ra. The host in N-CGL 685 may include, but is not limited to, Bphen and / or MTDATA. The content of the alkali metal or alkaline earth metal in N-CGL 685 may be between about 0.01 wt% and about 30 wt% based on the total weight of the components in N-CGL 685.

[0375] P-CGL 690 may include, but is not limited to, a selection of WO x 、MoO x , V2O5 and a combination thereof and / or an organic material selected from the group consisting of NPD, HAT-CN, F4TCNQ, TPD, N,N,N',N'-tetranaphthylbenzidine (TNB), TCTA, N,N'-dioctyl-3,4,9,10-perylene dicarboximide (PTCDI-C8) and / or a combination thereof.

[0376] The EML1 640 may be a blue EML. In this case, the EML1 640 may be a blue EML, a sky blue EML, or a dark blue EML. The EML1 640 may include a blue host and a blue dopant.

[0377] For example, the blue host may include, but is not limited to, mCP, 9-(3-(9H-carbazol-9-yl)phenyl)-9H-carbazol-3-carbonitrile (mCP-CN), mCBP, CBP-CN, 9-(3-(9H-carbazol-9-yl)phenyl)-3-(diphenylphosphinyl)-9H-carbazol (mCPPO1), 3,5-bis(9H-carbazol-9-yl)biphenyl (Ph-mCP), TSPO1, 9-(3'-(9H-carbazol-9-yl)-[1,1'-biphenyl]-1,1'-diphenylphosphinyl]-9H-carbazol-3-carbonitrile ...

[0014] The invention relates to bis(2-methylphenyl)diphenylsilane (UGH-1), 1,4-bis(triphenylsilyl)benzene (UGH-2), 1,3-bis(triphenylsilyl)benzene (UGH-3), 9,9-spirobifluoren-2-yl-diphenyl-phosphine oxide (SPPO1), 9,9'-(5-(triphenylsilyl)-1,3-phenylene)bis(9H-carbazole) (SimCP), and / or combinations thereof.

[0378] The blue dopant may include at least one of a blue phosphorescent material, a blue fluorescent material, and a blue delayed fluorescent material. As an example, the blue dopant may include, but is not limited to, perylene, 4,4'-bis[4-(di-p-tolylamino)phenyl]biphenyl (DPAVBi), 4-(di-p-tolylamino)-4-4'-[(di-p-tolylamino)phenyl]stilbene (DPAVB), 4,4'-bis[4-(diphenylamino)phenyl]biphenyl (BDAVBi), 2,7-bis(4-diphenylamino)phenyl)-9,9-heterocyclic fluorene (spiro-DPAVB), and 4,4'-bis[4-(diphenylamino)phenyl]biphenyl (BDAVBi). VBi), [1,4-bis[2-[4-[N,N-di(p-tolyl)amino]phenyl]vinyl]benzene (DSB), 1-4-bis-[4-(N,N-diphenyl)amino]phenylvinylbenzene (DSA), 2,5,8,11-tetra-tert-butylperylene (TBPe), bis(2-(2-hydroxyphenyl)-pyridinium)beryllium (Bepp2), 9-(9-phenylcarbazol-3-yl)-10-(naphthalen-1-yl)anthracene (PCAN), methyl-tris(1- mer-Tris(1-phenyl-3-methylimidazolin-2-ylidene-C,C(2)'iridium(III,mer-Ir(pmi)3), fac-Tris(1,3-diphenyl-benzimidazolin-2-ylidene-C,C(2)'iridium(III) benzimidazolin-2-ylidene-C,C(2)'iridium(III,fac-Ir(dpbic)3), bis(3,4,5-trifluoro-2-(2-pyridyl)phenyl-(2-carboxypyridyl)iridium(III) (Ir(tfpd)2pic), tris(2-(4,6-difluorophenyl)pyridine)iridium(III) (Ir(Fppy)3), bis[2-(4,6-difluorophenyl)pyridine-C 2 ,N](picolinate)iridium(III) (FIrpic), and / or combinations thereof.

[0379] EML2 740 may include a lower EML (first layer) 740A disposed between EBL2 730 and HBL2 750, and an upper EML (second layer) 740B disposed between the lower EML 740A and the HBL2 750. One of the lower EML 740A and the upper EML 740B may emit red, and the other of the lower EML 740A and the upper EML 740B may emit green. Hereinafter, EML2 740, in which the lower EML 740A emits red and the upper EML 740B emits green, will be described in detail.

[0380] The lower EML 740A may include a red host and a red dopant. The red host may include, but is not limited to, mCP-CN, CBP, mCBP, mCP, DPEPO, 2,8-bis(diphenylphosphoryl)dibenzothiophene (PPT), 1,3,5-tris[(3-pyridyl)-phenol-3-yl]benzene (TmPyPB), 2,6-bis(9H-carbazol-9-yl)pyridine (PYD-2Cz), 2,8-bis(9H-carbazol-9-yl)dibenzothiophene (DCzDBT), 3',5'-bis(carbazol-9-yl)pyridine (PYD-2Cz ... )-[1,1'-biphenyl]-3,5-dicarbonitrile (DCzTPA), 4'-(9H-carbazole-9-yl)biphenyl-3,5-dicarbonitrile (4'-(9H-carbazole-9-yl)biphenyl-3,5-dicarbonitrile (pCzB-2CN), 3'-(9H-carbazole-9-yl)biphenyl-3,5-dicarbonitrile (mCzB-2CN), TSPO1, 9-(9-phenyl-9H-carbazole-6-yl)-9H-carbazole (CCP), 4-(3-(triphenylphosphine)-1,4-dicarbazole-1,4-dicarbazole-2,4-dicarbazole-3,5-dicarbonitrile (pCzB-2CN), 3'-(9H-carbazole-9-yl)biphenyl-3,5-dicarbonitrile (mCzB-2CN), TSPO1, 9-(9-phenyl-9H-carbazole-6-yl)-9H-carbazole (CCP), phenyl-2-yl)phenyl)dibenzo[b,d]thiophene, 9-(4-(9H-carbazol-9-yl)phenyl)-9H-3,9'-biscarbazole, 9-(3-(9H-carbazol-9-yl)phenyl)-9H-3,9'-biscarbazole, 9-(6-(9H-carbazol-9-yl)pyridin-3-yl)-9H-3,9'-biscarbazole), 9,9'-diphenyl-9H,9'H-3,3'-biscarbazole (BCzPh), 1,3,5-tris(carbazole- 9-yl)benzene (TCP), TCTA, 4,4'-bis(carbazol-9-yl)-2,2'-dimethylbiphenyl (CDBP), 2,7-bis(carbazol-9-yl)-9,9-dimethylfluorene (DMFL-CBP), 2,2',7,7'-tetra(carbazol-9-yl)-9,9-spirofluorene (Spiro-CBP), 3,6-bis(carbazol-9-yl)-9-(2-ethyl-hexyl)-9H-carbazole (TCz1), and / or combinations thereof.

[0381] The red dopant may include at least one of a red phosphorescent material, a red fluorescent material, and a red delayed fluorescent material. As an example, the red dopant may include, but is not limited to, [bis(2-(4,6-dimethyl)phenylquinoline)](2,2,6,6-tetramethylheptane-3,5-dionato)iridium(III), bis[2-(4-n-hexylphenyl)quinoline](acetylacetonato)iridium(III) (Hex-Ir(phq)2(acac)), tris[2-(4-n-hexylphenyl)quinoline]iridium(III) (Hex-Ir(phq)3), tris[2-phenyl-4-methylquinoline]iridium(III) (Ir(Mphq)3), bis(2-phenylquinoline)(2,2,6,6-tetramethylheptene-3,5-dionato)iridium(III) (Ir(dpm)PQ2), bis(phenylisoquinoline)(2,2,6,6-tetramethylheptene-3,5-dionato)iridium(III) (Ir(dpm)(piq )2), (bis[(4-n-hexylphenyl)isoquinolinato](acetylacetonate)iridium(III))(Hex-Ir(piq)2(acac)), tris[2-(4-n-hexylphenyl)quinolinato]iridium(III))(Hex-Ir(piq)3), tris(2-(3-methylphenyl)-7-methyl-quinolinato)iridium(Ir(dmpq)3), bis[2-(2-methylphenyl)-7-methyl-quinolinato](acetylacetonate)iridium(III))(Ir(dmpq)2(acac)), bis[2-(3,5-dimethylphenyl)-4-methyl-quinolinato](acetylacetonate)iridium(III))(Ir(mphmq)2(acac)), tris(dibenzoylmethane)mono(1,10-phenanthroline)europium(III))(Eu(dbm)3(phen)), and / or combinations thereof.

[0382] The upper EML 740B may include a dopant 742, a first host 744, and / or a second host 746. The dopant 742 is an organic metal compound of a green phosphorescent material having a structure represented by Formulas 1 to 6. The first host 744 is a fused heteroaryl compound having at least one nitrogen atom and a p-type host having a structure represented by Formulas 7 to 8. The second host 746 is an azine-based organic compound having an n-type host having a structure represented by Formulas 9 to 11.

[0383] As an example, the content of the host, including the first host 744 and the second host 746, in the upper EML 740B may be, but is not limited to, between approximately 50 wt% and approximately 99 wt%, such as between approximately 80 wt% and approximately 95 wt%, based on the total weight of the components in the upper EML 740B. The content of the dopant in the upper EML 740B may be, but is not limited to, between approximately 1 wt% and approximately 50 wt%, such as between approximately 5 wt% and approximately 20 wt%, based on the total weight of the components in the upper EML 740B. When the upper EML 740B includes the first host 744 and the second host 746, the first host 744 and the second host 746 may be mixed in a weight ratio of, but is not limited to, approximately 4:1 to approximately 1:4, such as approximately 3:1 to approximately 1:3.

[0384] Alternatively, the EML2 740 may further include an intermediate light emitting material layer (third layer, Figure 6 740C in).

[0385] OLED D2 according to an exemplary embodiment of the present disclosure has a tandem structure. At least one EML includes a dopant 742 having favorable luminescent properties, and a first host 744 and / or a second host 746 having favorable charge and energy transfer properties. By combining the dopant 742, which has a rigid chemical conformation and facilitates adjustment of luminescent color, with the first host 744 and / or the second host 746 having favorable luminescent properties, OLED D2 can reduce its driving voltage and improve its luminous efficiency and luminous lifetime.

[0386] An OLED may have three or more light-emitting sections to form a tandem structure. Figure 6 : shows a schematic cross-sectional view of an organic light emitting diode according to another exemplary embodiment of the present disclosure. Figure 6 As shown, the OLED D3 includes a first electrode 510 and a second electrode 520 facing each other, and a light-emitting layer 530' disposed between the first electrode 510 and the second electrode 520. The light-emitting layer 530' includes a first light-emitting portion 600 disposed between the first electrode 510 and the second electrode 520, a second light-emitting portion 700' disposed between the first light-emitting portion 600 and the second electrode 520, a third light-emitting portion 800 disposed between the second light-emitting portion 700' and the second electrode 520, a first charge generation layer (CGL1) 680 disposed between the first light-emitting portion 600 and the second light-emitting portion 700', and a second charge generation layer (CGL2) 780 disposed between the second light-emitting portion 700' and the third light-emitting portion 800.

[0387] The first light-emitting portion 600 includes a first EML (EML1) 640. The first light-emitting portion 600 may further include at least one of a HIL 610 disposed between the first electrode 510 and the EML1 640, a first HTL (HTL1) 620 disposed between the HIL 610 and the EML1 640, and a first ETL (ETL1) 660 disposed between the EML1 640 and the CGL 680. Alternatively, the first light-emitting portion 600 may further include a first EBL (EBL1) 630 disposed between the HTL1 620 and the EML1 640, and / or a first HBL (HBL1) 650 disposed between the EML1 640 and the ETL1 660.

[0388] The second light-emitting portion 700′ includes a second EML (EML2) 740′. The second light-emitting portion 700′ may further include at least one of a second HTL (HTL2) 720 disposed between the CGL1 680 and the EML2 740′, and a second ETL (ETL2) 760 disposed between the second electrode 520 and the EML2 740′. Alternatively, the second light-emitting portion 700′ may further include a second EBL (EBL2) 730 disposed between the HTL2 720 and the EML2 740′, and / or a second HBL (HBL2) 750 disposed between the EML2 740′ and the ETL2 760.

[0389] The third light-emitting portion 800 includes a third EML (EML3) 840. The third light-emitting portion 800 may further include at least one of a third HTL (HTL3) 820 disposed between the CGL 2780 and the EML3 840, a third ETL (ETL3) 860 disposed between the second electrode 520 and the EML3 840, and an EIL 870 disposed between the second electrode 520 and the ETL3 860. Alternatively, the third light-emitting portion 800 may further include a third EBL (EBL3) 830 disposed between the HTL3 820 and the EML3 840, and / or a third HBL (HBL3) 850 disposed between the EML3 840 and the ETL3 860.

[0390] At least one of EML1 640, EML2 740', and EML3 840 may include a dopant 742, a first host 744, and / or a second host 746 to emit green or yellow-green. Furthermore, another of EML1 640, EML2 740', and EML3 840 emits blue, so that OLED D3 can achieve white emission. Hereinafter, the OLED that emits green or yellow-green from EML2 740' will be described in detail.

[0391] CGL1 680 is disposed between the first light-emitting section 600 and the second light-emitting section 700', and CGL2 780 is disposed between the second light-emitting section 700' and the third light-emitting section 800. CGL1 680 includes a first N-type CGL (N-CGL1) 685 disposed adjacent to the first light-emitting section 600 and a first P-type CGL (P-CGL1) 690 disposed adjacent to the second light-emitting section 700'. CGL2 780 includes a second N-type CGL (N-CGL2) 785 disposed adjacent to the second light-emitting section 700' and a second P-type CGL (P-CGL2) 790 disposed adjacent to the third light-emitting section 800. Each of N-CGL1 685 and N-CGL2 785 injects electrons into EML1 640 of the first light-emitting section 600 and EML2 740' of the second light-emitting section 700', respectively. Each of the P-CGL1 690 and the P-CGL2 790 injects holes into the EML2 740 ′ of the second light emitting portion 700 ′ and the EML3 840 of the third light emitting portion 800 , respectively.

[0392] Each of EML1 640 and EML3 840 may be independently a blue EML. In this case, each of EML1 640 and EML3 840 may be independently a blue EML, a sky blue EML, or a dark blue EML. Each of EML1 640 and EML3 840 may independently include a blue host and a blue dopant. Each of the blue host and the blue dopant may be as shown in FIG. Figure 5 The blue host and blue dopant are each the same. For example, the blue dopant may include at least one of a blue phosphorescent material, a blue fluorescent material, and a blue delayed fluorescent material. Alternatively, the blue dopant in EML1 640 may be the same as or different from the blue dopant in EML3 840 in terms of color and / or luminous efficiency.

[0393] EML2 740' may include a lower EML (first layer) 740A disposed between EBL2 730 and HBL2 750, and an upper EML (second layer) 740B disposed between the lower EML 740A and HBL2 750. Optionally, an intermediate EML (third layer) 740C is disposed between the lower EML 740A and the upper EML 740B. One of the lower EML 740A and the upper EML 740B may emit red, and the other of the lower EML 740A and the upper EML 740B may emit green. Hereinafter, EML2 740', in which the lower EML 740A emits red and the upper EML 740B emits green, will be described in detail.

[0394] The lower EML 740A may include a red host and a red dopant. Each of the red host and the red dopant may be Figure 5The red host and the red dopant are each the same. For example, the red dopant may include at least one of a red phosphorescent material, a red fluorescent material, and a red delayed fluorescent material.

[0395] The upper EML 740B may include a dopant 742, a first host 744, and / or a second host 746. The dopant 742 is an organic metal compound of a green phosphorescent material having a structure represented by Formulas 1 to 6. The first host 744 is a fused heteroaryl compound having at least one nitrogen atom and a p-type host having a structure represented by Formulas 7 to 8. The second host 746 is an azine-based organic compound having an n-type host having a structure represented by Formulas 9 to 11.

[0396] As an example, the content of the host, including the first host 744 and the second host 746, in the upper EML 740B may be, but is not limited to, between approximately 50 wt% and approximately 99 wt%, such as between approximately 80 wt% and approximately 95 wt%, based on the total weight of the components in the upper EML 740B. The content of the dopant in the upper EML 740B may be, but is not limited to, between approximately 1 wt% and approximately 50 wt%, such as between approximately 5 wt% and approximately 20 wt%, based on the total weight of the components in the upper EML 740B. When the upper EML 740B includes the first host 744 and the second host 746, the first host 744 and the second host 746 may be mixed in a weight ratio of, but is not limited to, approximately 4:1 to approximately 1:4, such as approximately 3:1 to approximately 1:3.

[0397] The intermediate EML 740C may be a yellow-green EML and may include a yellow-green host and a yellow-green dopant. As an example, the yellow-green host may be the same as the red host. The yellow-green dopant may include at least one of a yellow-green phosphorescent material, a yellow-green fluorescent material, and a yellow-green delayed fluorescent material. The intermediate EML 740C may be omitted.

[0398] In OLED D3, at least one EML includes a dopant 742 having favorable luminescence properties, a first host 744, and / or a second host 746. Dopant 742 can maintain a stable chemical conformation during the luminescence process. OLED D3, including dopant 742 having favorable luminescence properties and first host 744 and / or second host 746, can achieve white light emission with improved luminescence efficiency and lifetime.

[0399] Synthesis Example 1: Synthesis of Compound 1

[0400] (1) Synthesis of Intermediate A-1

[0401] [Reaction formula 1-1]

[0402]

[0403] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-2 (2.27 g, 20 mmol), tetrakis(triphenylphosphine)palladium(0) (Pd(PPh3)4, 1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed with stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate A-1 (6.05 g, yield: 95%).

[0404] (2) Synthesis of intermediate I-1

[0405] [Reaction formula 1-2]

[0406]

[0407] Compound SM-3 (3.10 g, 20 mmol), IrCl3 (2.39 g, 8.0 mmol), and a mixed solvent of ethoxyethanol (90 mL) and water (30 mL) were added to a 250 mL round-bottom flask. The solution was then stirred at 130°C for 16 hours. After the reaction was complete, the solution was cooled to room temperature, and methanol was added to the solution to facilitate filtration of the resulting solid under reduced pressure to obtain intermediate I-1 (9.56 g, yield: 89%) as a solid.

[0408] (3) Synthesis of intermediate I-2

[0409] [Reaction formula 1-3]

[0410]

[0411] Intermediate I-1 (5.16 g, 4.8 mmol), silver trifluoromethanesulfonate (AgOTf, 3.6 g, 14.3 mmol), and dichloromethane were added to a 1000 mL round-bottom flask. The solution was then stirred at room temperature for 16 hours. After the reaction was complete, the solution was filtered through celite to remove the solid. The solvent was removed by distillation under reduced pressure to obtain intermediate I-2 (6.03 g, yield: 88%) as a solid.

[0412] (4) Synthesis of Compound 1

[0413] [Reaction formula 1-4]

[0414]

[0415] Under a nitrogen atmosphere, intermediate A-1 (1.11 g, 3.5 mmol), intermediate I-2 (2.15 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130 ° C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 1 (2.01 g, yield: 82%).

[0416] Synthesis Example 2: Synthesis of Compound 2

[0417] (1) Synthesis of intermediate B-1

[0418] [Reaction formula 2-1]

[0419]

[0420] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-4 (2.54 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate B-1 (6.17 g, yield: 93%).

[0421] (2) Synthesis of Compound 2

[0422] [Reaction formula 2-2]

[0423]

[0424] Under a nitrogen atmosphere, intermediate B-1 (1.16 g, 3.5 mmol), intermediate I-2 (2.15 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130 ° C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 2 (2.02 g, yield: 81%).

[0425] Synthesis Example 3: Synthesis of Compound 16

[0426] (1) Synthesis of intermediate C-1

[0427] [Reaction formula 3-1]

[0428]

[0429] Under a nitrogen atmosphere, compound SM-5 (7.34 g, 20 mmol), compound SM-2 (2.27 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate C-1 (5.66 g, yield: 93%).

[0430] (2) Synthesis of Compound 16

[0431] [Reaction formula 3-2]

[0432]

[0433] Under a nitrogen atmosphere, intermediate C-1 (1.12 g, 3.5 mmol), intermediate I-2 (2.15 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130 ° C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 16 (2.02 g, yield: 81%).

[0434] Synthesis Example 4: Synthesis of Compound 17

[0435] (1) Synthesis of intermediate D-1

[0436] [Reaction formula 4-1]

[0437]

[0438] Under a nitrogen atmosphere, compound SM-5 (7.34 g, 20 mmol), compound SM-4 (2.54 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate D-1 (5.86 g, yield: 88%).

[0439] (2) Synthesis of compound 17

[0440] [Reaction Formula 4-2]

[0441]

[0442] Under a nitrogen atmosphere, intermediate D-1 (1.17 g, 3.5 mmol), intermediate I-2 (2.15 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130 ° C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 17 (2.25 g, yield: 90%).

[0443] Synthesis Example 5: Synthesis of Compound 27

[0444] (1) Synthesis of intermediate E-1

[0445] [Reaction Formula 5-1]

[0446]

[0447] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-6 (4.08 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate E-1 (7.34 g, yield: 90%).

[0448] (2) Synthesis of Compound 27

[0449] [Reaction Formula 5-2]

[0450]

[0451] Under a nitrogen atmosphere, intermediate E-1 (1.43 g, 3.5 mmol), intermediate I-2 (2.15 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130 ° C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 27 (2.45 g, yield: 90%).

[0452] Synthesis Example 6: Synthesis of Compound 32

[0453] (1) Synthesis of intermediate F-1

[0454] [Reaction formula 6-1]

[0455]

[0456] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-7 (4.24 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate F-1 (7.67 g, yield: 92%).

[0457] (2) Synthesis of intermediate J-1

[0458] [Reaction formula 6-2]

[0459]

[0460] Compound SM-8 (3.38 g, 20 mmol), IrCl3 (2.39 g, 8.0 mmol), and a mixed solvent of ethoxyethanol (90 mL) and water (30 mL) were added to a 250 mL round-bottom flask. The solution was then stirred at 130°C for 16 hours. After the reaction was complete, the solution was cooled to room temperature, and methanol was added to the solution to facilitate filtration of the resulting solid under reduced pressure to obtain Intermediate J-1 (4.07 g, yield: 90%) as a solid.

[0461] (3) Synthesis of intermediate J-2

[0462] [Reaction formula 6-3]

[0463]

[0464] Intermediate J-1 (5.16 g, 4.8 mmol), silver trifluoromethanesulfonate (AgOTf, 3.6 g, 14.3 mmol), and dichloromethane were added to a 1000 mL round-bottom flask. The solution was then stirred at room temperature for 16 hours. After the reaction was complete, the solution was filtered through celite to remove solids. The solvent was removed by distillation under reduced pressure to obtain intermediate J-2 (6.03 g, yield: 88%) as a solid.

[0465] (4) Synthesis of compound 32

[0466] [Reaction formula 6-4]

[0467]

[0468] Under a nitrogen atmosphere, intermediate F-1 (1.46 g, 3.5 mmol), intermediate J-2 (2.23 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by distillation under reduced pressure. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 32 (2.47 g, yield: 87%).

[0469] Synthesis Example 7: Synthesis of Compound 34

[0470] (1) Synthesis of intermediate G-1

[0471] [Reaction Formula 7-1]

[0472]

[0473] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-9 (4.24 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate G-1 (7.53 g, yield: 91%).

[0474] (2) Synthesis of compound 34

[0475] [Reaction Formula 7-2]

[0476]

[0477] Under a nitrogen atmosphere, intermediate G-1 (1.45 g, 3.5 mmol), intermediate J-2 (2.23 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130 ° C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 34 (2.26 g, yield: 80%).

[0478] Synthesis Example 8: Synthesis of Compound 35

[0479] (1) Synthesis of intermediate H-1

[0480] [Reaction formula 8-1]

[0481]

[0482] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-10 (4.14 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. The organic layer was extracted with chloroform and washed with water. Water was removed with anhydrous MgSO4, the dried organic layer was filtered, and the organic solvent was removed under reduced pressure. The crude product was then purified by column chromatography to obtain intermediate H-1 (7.83 g, yield: 95%).

[0483] (2) Synthesis of compound 35

[0484] [Reaction formula 8-2]

[0485]

[0486] Under a nitrogen atmosphere, intermediate H-1 (1.44 g, 3.5 mmol), intermediate J-2 (2.23 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 35 (2.28 g, yield: 81%).

[0487] Synthesis Example 9: Synthesis of Compound 136

[0488] (1) Synthesis of Intermediate A-2

[0489] [Reaction formula 9-1]

[0490]

[0491] Intermediate A-1 (6.36 g, 20 mmol), IrCl3 (2.39 g, 8.0 mmol), and a mixed solvent of ethoxyethanol (90 mL) and water (30 mL) were added to a 250 mL round-bottom flask. The solution was then stirred at 130°C for 16 hours. After the reaction was complete, the solution was cooled to room temperature, and methanol was added to the solution to facilitate filtration of the resulting solid under reduced pressure to obtain Intermediate A-2 (5.53 g, yield: 80%) as a solid.

[0492] (2) Synthesis of Intermediate A-3

[0493] [Reaction formula 9-2]

[0494]

[0495] Intermediate A-2 (8.29 g, 4.8 mmol), silver trifluoromethanesulfonate (AgOTf, 3.6 g, 14.3 mmol), and dichloromethane were added to a 1000 mL round-bottom flask. The solution was then stirred at room temperature for 16 hours. After the reaction was complete, the solution was filtered through celite to remove the solid. The solvent was removed by distillation under reduced pressure to obtain Intermediate A-3 (7.99 g, yield: 80%) as a solid.

[0496] (3) Synthesis of Compound 136

[0497] [Reaction formula 9-3]

[0498]

[0499] Under a nitrogen atmosphere, compound L-1 (0.54 g, 3.5 mmol), intermediate A-3 (3.12 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 136 (2.46 g, yield: 80%).

[0500] Synthesis Example 10: Synthesis of Compound 137

[0501] [Reaction formula 10]

[0502]

[0503] Under a nitrogen atmosphere, compound L-2 (0.35 g, 3.5 mmol), intermediate A-3 (3.12 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 137 (2.22 g, yield: 80%).

[0504] Synthesis Example 11: Synthesis of Compound 141

[0505] (1) Synthesis of intermediate C-2

[0506] [Reaction formula 11-1]

[0507]

[0508] Intermediate C-1 (6.36 g, 20 mmol), IrCl3 (2.39 g, 8.0 mmol), and a mixed solvent of ethoxyethanol (90 mL) and water (30 mL) were added to a 250 mL round-bottom flask. The solution was then stirred at 130°C for 16 hours. After the reaction was complete, the solution was cooled to room temperature, and methanol was added to the solution to facilitate filtration of the resulting solid under reduced pressure to obtain Intermediate C-2 (5.32 g, yield: 77%) as a solid.

[0509] (2) Synthesis of intermediate C-3

[0510] [Reaction formula 11-2]

[0511]

[0512] Intermediate C-2 (8.29 g, 4.8 mmol), silver trifluoromethanesulfonate (AgOTf, 3.6 g, 14.3 mmol), and dichloromethane were added to a 1000 mL round-bottom flask. The solution was then stirred at room temperature for 16 hours. After the reaction was complete, the solution was filtered through celite to remove solids. The solvent was removed by distillation under reduced pressure to obtain intermediate C-3 (7.29 g, yield: 72%) as a solid.

[0513] (3) Synthesis of Compound 141

[0514] [Reaction formula 11-3]

[0515]

[0516] Under a nitrogen atmosphere, compound L-1 (0.54 g, 3.5 mmol), intermediate C-3 (3.13 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 141 (2.45 g, yield: 83%).

[0517] Synthesis Example 12: Synthesis of Compound 142

[0518] (1) Synthesis of intermediate D-2

[0519] [Reaction formula 12-1]

[0520]

[0521] Intermediate D-1 (6.64 g, 20 mmol), IrCl3 (2.39 g, 8.0 mmol), and a mixed solvent of ethoxyethanol (90 mL) and water (30 mL) were added to a 250 mL round-bottom flask. The solution was then stirred at 130°C for 16 hours. After the reaction was complete, the solution was cooled to room temperature, and methanol was added to the solution to facilitate filtration of the resulting solid under reduced pressure to obtain Intermediate D-2 (5.71 g, yield: 80%) as a solid.

[0522] (2) Synthesis of intermediate D-3

[0523] [Reaction formula 12-2]

[0524]

[0525] Intermediate D-2 (8.58 g, 4.8 mmol), silver trifluoromethanesulfonate (AgOTf, 3.6 g, 14.3 mmol), and dichloromethane were added to a 1000 mL round-bottom flask. The solution was then stirred at room temperature for 16 hours. After the reaction was complete, the solution was filtered through celite to remove solids. The solvent was removed by distillation under reduced pressure to obtain intermediate D-3 (7.09 g, yield: 69%) as a solid.

[0526] (3) Synthesis of Compound 142

[0527] [Reaction formula 12-3]

[0528]

[0529] Under a nitrogen atmosphere, compound L-2 (0.35 g, 3.5 mmol), intermediate D-3 (3.21 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was completed, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by reduced pressure distillation. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 142 (2.12 g, yield: 74%).

[0530] Synthesis Example 13: Synthesis of Compound 147

[0531] (1) Synthesis of intermediate E-2

[0532] [Reaction formula 13-1]

[0533]

[0534] Intermediate E-1 (8.16 g, 20 mmol), IrCl3 (2.39 g, 8.0 mmol), and a mixed solvent of ethoxyethanol (90 mL) and water (30 mL) were added to a 250 mL round-bottom flask. The solution was then stirred at 130°C for 16 hours. After the reaction was complete, the solution was cooled to room temperature, and methanol was added to the solution to facilitate filtration of the resulting solid under reduced pressure to obtain Intermediate E-2 (7.26 g, yield: 87%) as a solid.

[0535] (2) Synthesis of intermediate E-3

[0536] [Reaction formula 13-2]

[0537]

[0538] Intermediate E-2 (10.0 g, 4.8 mmol), silver trifluoromethanesulfonate (AgOTf, 3.6 g, 14.3 mmol), and dichloromethane were added to a 1000 mL round-bottom flask. The solution was then stirred at room temperature for 16 hours. After the reaction was complete, the solution was filtered through celite to remove solids. The solvent was removed by distillation under reduced pressure to obtain intermediate E-3 (8.91 g, yield: 76%) as a solid.

[0539] (3) Synthesis of Compound 147

[0540] [Reaction formula 13-3]

[0541]

[0542] Under a nitrogen atmosphere, compound L-2 (0.35 g, 3.5 mmol), intermediate E-3 (3.36 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was complete, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by distillation under reduced pressure. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 147 (2.59 g, yield: 78%).

[0543] Synthesis Example 14: Synthesis of Compound 148

[0544] [Reaction formula 14]

[0545]

[0546] Under a nitrogen atmosphere, compound L-1 (0.54 g, 3.5 mmol), intermediate E-3 (3.36 g, 3.0 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 100 mL round-bottom flask. The solution was then stirred at 130°C for 48 hours. After the reaction was complete, the organic layer was extracted with dichloromethane and washed with distilled water, and the solvent was removed by distillation under reduced pressure. The crude product was purified by column chromatography (eluent: toluene and hexane) to obtain compound 148 (2.96 g, yield: 85%).

[0547] Synthesis Example 15: Synthesis of Compound 251

[0548] [Reaction formula 15]

[0549]

[0550] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate A-1 (1.11 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135 ° C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 251 (2.31 g, yield: 91%).

[0551] Synthesis Example 16: Synthesis of Compound 252

[0552] [Reaction formula 16]

[0553]

[0554] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate E-1 (1.43 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135 ° C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 252 (2.61 g, yield: 93%).

[0555] Synthesis Example 17: Synthesis of Compound 253

[0556] (1) Synthesis of intermediate K-1

[0557] [Reaction formula 17-1]

[0558]

[0559] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-11 (3.79 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane, and washed with excess water. The moisture was removed with anhydrous magnesium sulfate, the dried organic layer was filtered, and the filtrate was concentrated under reduced pressure. The concentrate was purified by column chromatography to obtain intermediate K-1 (7.26 g, yield 92%).

[0560] (2) Synthesis of Compound 253

[0561] [Reaction formula 17-2]

[0562]

[0563] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate K-1 (1.38 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135 ° C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 253 (2.55 g, yield: 92%).

[0564] Synthesis Example 18: Synthesis of Compound 254

[0565] (1) Synthesis of intermediate M-1

[0566] [Reaction formula 18-1]

[0567]

[0568] Under a nitrogen atmosphere, compound SM-1 (7.34 g, 20 mmol), compound SM-12 (4.26 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane, and washed with excess water. The moisture was removed with anhydrous magnesium sulfate, the dried organic layer was filtered, and the filtrate was concentrated under reduced pressure. The concentrate was purified by column chromatography to obtain intermediate M-1 (7.04 g, yield 94%).

[0569] (2) Synthesis of Compound 254

[0570] [Reaction formula 18-2]

[0571]

[0572] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate M-1 (1.43 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135 ° C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 254 (2.55 g, yield: 89%).

[0573] Synthesis Example 19: Synthesis of Compound 255

[0574] (1) Synthesis of intermediate N-1

[0575] [Reaction 19-1]

[0576]

[0577] Under a nitrogen atmosphere, compound SM-13 (8.47 g, 20 mmol), compound SM-11 (3.79 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane, and washed with excess water. The moisture was removed with anhydrous magnesium sulfate, the dried organic layer was filtered, and the filtrate was concentrated under reduced pressure. The concentrate was purified by column chromatography to obtain intermediate N-1 (8.11 g, yield 90%).

[0578] (2) Synthesis of Compound 255

[0579] [Reaction 19-2]

[0580]

[0581] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate N-1 (1.58 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135°C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 255 (2.55 g, yield: 87%).

[0582] Synthesis Example 20: Synthesis of Compound 256

[0583] (1) Synthesis of intermediate O-1

[0584] [Reaction formula 20-1]

[0585]

[0586] Under a nitrogen atmosphere, compound SM-13 (8.47 g, 20 mmol), compound SM-14 (3.79 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane, and washed with excess water. The moisture was removed with anhydrous magnesium sulfate, the dried organic layer was filtered, and the filtrate was concentrated under reduced pressure. The concentrate was purified by column chromatography to obtain intermediate O-1 (8.20 g, yield 91%).

[0587] (2) Synthesis of Compound 256

[0588] [Reaction formula 20-2]

[0589]

[0590] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate K-1 (1.38 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135°C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 256 (2.55 g, yield: 92%).

[0591] Synthesis Example 21: Synthesis of Compound 257

[0592] (1) Synthesis of intermediate P-1

[0593] [Reaction formula 21-1]

[0594]

[0595] Under a nitrogen atmosphere, compound SM-15 (9.47 g, 20 mmol), compound SM-14 (3.79 g, 20 mmol), Pd(PPh3)4 (1.2 g, 1 mmol), K2CO3 (8.3 g, 60 mmol), and a mixed solvent of toluene (200 mL) and water (50 mL) were added to a 500 mL round-bottom flask. The solution was then heated and refluxed under stirring for 12 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane, and washed with excess water. The moisture was removed with anhydrous magnesium sulfate, the dried organic layer was filtered, and the filtrate was concentrated under reduced pressure. The concentrate was then purified by column chromatography to obtain intermediate P-1 (7.84 g, yield 87%).

[0596] (2) Synthesis of Compound 257

[0597] [Reaction formula 21-2]

[0598]

[0599] Under a nitrogen atmosphere, intermediate J-2 (2.23 g, 3.0 mmol), intermediate P-1 (1.58 g, 3.5 mmol), and a mixed solvent of 2-ethoxyethanol (40 mL) and DMF (40 mL) were added to a 150 mL round-bottom flask. The solution was then stirred at 135 ° C for 18 hours. After the reaction was completed, the solution was cooled to room temperature, the organic layer was extracted with dichloromethane and washed with distilled water, and the moisture was removed with anhydrous magnesium sulfate. The filtrate was treated under reduced pressure to obtain a crude product. The crude product was then purified by column chromatography (eluent: vinyl acetate: hexane, volume ratio of 25:75) to obtain compound 257 (2.67 g, yield: 91%).

[0600] Example 1 (Ex. 1) Fabrication of OLED

[0601] An organic light-emitting diode was fabricated by incorporating GHH1 of Formula 8 as the first host, GEH1 of Formula 11 as the second host, and Compound 251 of Synthesis Example 15 as a dopant into an emitting material layer (EML). A glass substrate coated with a thin film of ITO (100 nm) was washed and ultrasonically cleaned with solvents such as isopropyl alcohol and acetone, and then dried in an oven at 100°C. The substrate was transferred to a vacuum chamber to deposit the light-emitting layer. Subsequently, at about 5-7×10 -7 The light-emitting layer and cathode were deposited by evaporation from a heated boat under a temperature of 1000 0.5 °C. The deposition rate was set to The order is as follows:

[0602] Hole injection layer (HIL) (hereinafter referred to as HI-1 (NPNPB), thickness 100 nm); hole transport layer (HTL) (hereinafter referred to as HT-1, thickness 350 nm); EML (host (first host: second host = 7:3 weight ratio, 90 wt%), dopant (compound 251, 10 wt%), 30 nm); ETL (hereinafter referred to as ET-1 (ZADN), thickness 350 nm); EIL (Liq, thickness 200 nm); and cathode (Al, thickness 100 nm).

[0603] Example 2-12: Fabrication of OLED

[0604] OLEDs were manufactured using the same procedure and the same materials as in Example 1, except that GEH2 (about Ex. 2), GEH3 (about Ex. 3), GEH4 (about Ex. 4), GEH5 (about Ex. 5), GEH6 (about Ex. 6), GEH7 (about Ex. 7), GEH8 (about Ex. 8), GEH9 (about Ex. 9), GEH10 (about Ex. 10), GEH11 (about Ex. 11), and GEH12 (about Ex. 12) of Formula 11 were used as the second host in the EML instead of GEH1.

[0605] Comparative Example 1 (Ref. 1): Production of OLED

[0606] OLEDs were fabricated using the same procedure and materials as in Example 1, except that 4,4′-bis(N-carbazolyl)-1,1′-biphenyl (CBP, 90 wt %) was used as the sole host in the EML instead of GHH1 and GEH1.

[0607] The HIL material (HI-1), HTL material (HT-1), CBP, ETL material (ET-1), and EIL material (Liq) are shown below:

[0608]

[0609] Test Example 1: Measurement of OLED Light Emitting Characteristics

[0610] The 9 mm 2 Each OLED in the light-emitting area was connected to an external power supply. The luminescence characteristics of all OLEDs were then evaluated at room temperature using a constant current source (KEITHLEY) and a photometer PR650. Specifically, at a current density of 10 mA / cm 2 The driving voltage (V), external quantum efficiency (EQE, relative value) and the time period for the luminance to decrease from the initial luminance to 95% (LT95, relative value) were measured. The measurement results are shown in Table 1 below.

[0611] Table 1: Light-emitting characteristics of OLEDs

[0612]

[0613] As shown in Table 1, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0614] Example 13: Fabrication of OLED

[0615] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH2 of Formula 8 was used as the first host in the EML instead of GHH1.

[0616] Example 14-24: Fabrication of OLED

[0617] OLEDs were manufactured using the same procedure and the same materials as in Example 13, except that GEH2 (for Ex. 14), GEH3 (for Ex. 15), GEH4 (for Ex. 16), GEH5 (for Ex. 17), GEH6 (for Ex. 18), GEH7 (for Ex. 19), GEH8 (for Ex. 20), GEH9 (for Ex. 21), GEH10 (for Ex. 22), GEH11 (for Ex. 23) and GEH12 (for Ex. 24) of Formula 11 were used as the second host in the EML instead of GEH1.

[0618] Test Example 2: Measurement of OLED Light Emitting Characteristics

[0619] The optical characteristics of each of the OLEDs manufactured in Examples 13 to 24 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 2 below.

[0620] Table 2: Light-emitting characteristics of OLEDs

[0621]

[0622]

[0623] As shown in Table 2, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0624] Example 25: Fabrication of OLED

[0625] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH3 of Formula 8 was used as the first host in the EML instead of GHH1.

[0626] Examples 26-36: Fabrication of OLEDs

[0627] OLEDs were manufactured using the same procedure and the same materials as in Example 25, except that GEH2 (for Ex. 26), GEH3 (for Ex. 27), GEH4 (for Ex. 28), GEH5 (for Ex. 29), GEH6 (for Ex. 30), GEH7 (for Ex. 31), GEH8 (for Ex. 32), GEH9 (for Ex. 33), GEH10 (for Ex. 34), GEH11 (for Ex. 35) and GEH12 (for Ex. 36) of Formula 11 were used as the second host in the EML instead of GEH1.

[0628] Test Example 3: Measurement of OLED Light Emitting Characteristics

[0629] The optical characteristics of each of the OLEDs manufactured in Examples 25 to 36 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 3 below.

[0630] Table 3: Light-emitting characteristics of OLEDs

[0631]

[0632]

[0633] As shown in Table 3, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0634] Example 37: Fabrication of OLED

[0635] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH4 of Formula 8 was used as the first host in the EML instead of GHH1.

[0636] Examples 38-48: Fabrication of OLEDs

[0637] OLEDs were manufactured using the same procedure and the same materials as in Example 37, except that GEH2 (for Ex. 38), GEH3 (for Ex. 39), GEH4 (for Ex. 40), GEH5 (for Ex. 41), GEH6 (for Ex. 42), GEH7 (for Ex. 43), GEH8 (for Ex. 44), GEH9 (for Ex. 45), GEH10 (for Ex. 46), GEH11 (for Ex. 47) and GEH12 (for Ex. 48) of Formula 11 were used as the second host in the EML instead of GEH1.

[0638] Test Example 4: Measurement of OLED Light Emitting Characteristics

[0639] The optical characteristics of each of the OLEDs manufactured in Examples 37 to 48 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 4 below.

[0640] Table 4: Light-emitting characteristics of OLEDs

[0641]

[0642]

[0643] As shown in Table 4, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0644] Example 49: Fabrication of OLED

[0645] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH5 of Formula 8 was used as the first host in the EML instead of GHH1.

[0646] Examples 50-60: Fabrication of OLEDs

[0647] OLEDs were manufactured using the same procedure and the same materials as in Example 49, except that GEH2 (for Ex. 50), GEH3 (for Ex. 51), GEH4 (for Ex. 52), GEH5 (for Ex. 53), GEH6 (for Ex. 54), GEH7 (for Ex. 55), GEH8 (for Ex. 56), GEH9 (for Ex. 57), GEH10 (for Ex. 58), GEH11 (for Ex. 59) and GEH12 (for Ex. 60) of Formula 11 were used as the second host in the EML instead of GEH1.

[0648] Test Example 5: Measurement of OLED Light Emitting Characteristics

[0649] The optical characteristics of each of the OLEDs manufactured in Examples 49 to 60 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 5 below.

[0650] Table 5: Light-emitting characteristics of OLEDs

[0651]

[0652]

[0653] As shown in Table 5, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0654] Example 61: Fabrication of OLED

[0655] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH6 of Formula 8 was used as the first host in the EML instead of GHH1.

[0656] Examples 62-72: Fabrication of OLEDs

[0657] OLEDs were manufactured using the same procedure and the same materials as in Example 61, except that GEH2 (for Ex. 62), GEH3 (for Ex. 63), GEH4 (for Ex. 64), GEH5 (for Ex. 65), GEH6 (for Ex. 66), GEH7 (for Ex. 67), GEH8 (for Ex. 68), GEH9 (for Ex. 69), GEH10 (for Ex. 70), GEH11 (for Ex. 71) and GEH12 (for Ex. 72) of Formula 11 were used as the second host in the EML instead of GEH1.

[0658] Test Example 6: Measurement of OLED Light Emitting Characteristics

[0659] The optical characteristics of each of the OLEDs manufactured in Examples 61 to 72 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 6 below.

[0660] Table 6: Light-emitting characteristics of OLEDs

[0661]

[0662]

[0663] As shown in Table 6, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95) has been greatly improved.

[0664] Example 73: Fabrication of OLED

[0665] An OLED was manufactured using the same procedure and materials as in Example 1, except that GHH7 of Formula 8 was used as the first host in the EML instead of GHH1.

[0666] Examples 74-84: Fabrication of OLEDs

[0667] OLEDs were manufactured using the same procedure and the same materials as in Example 73, except that GEH2 (for Ex. 74), GEH3 (for Ex. 75), GEH4 (for Ex. 76), GEH5 (for Ex. 77), GEH6 (for Ex. 78), GEH7 (for Ex. 79), GEH8 (for Ex. 80), GEH9 (for Ex. 81), GEH10 (for Ex. 82), GEH11 (for Ex. 83) and GEH12 (for Ex. 84) of Formula 11 were used as the second host in the EML instead of GEH1.

[0668] Test Example 7: Measurement of OLED Light Emitting Characteristics

[0669] The optical characteristics of each of the OLEDs manufactured in Examples 73 to 84 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 7 below.

[0670] Table 7: Light-emitting characteristics of OLEDs

[0671]

[0672]

[0673] As shown in Table 7, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0674] Example 85: Fabrication of OLED

[0675] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH8 of Formula 8 was used as the first host in the EML instead of GHH1.

[0676] Examples 86-96: Fabrication of OLEDs

[0677] OLEDs were manufactured using the same procedure and the same materials as in Example 85, except that GEH2 (for Ex. 86), GEH3 (for Ex. 87), GEH4 (for Ex. 88), GEH5 (for Ex. 89), GEH6 (for Ex. 90), GEH7 (for Ex. 91), GEH8 (for Ex. 92), GEH9 (for Ex. 93), GEH10 (for Ex. 94), GEH11 (for Ex. 95) and GEH12 (for Ex. 96) of Formula 11 were used as the second host in the EML instead of GEH1.

[0678] Test Example 8: Measurement of OLED Light Emitting Characteristics

[0679] The optical characteristics of each of the OLEDs manufactured in Examples 85 to 96 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 8 below.

[0680] Table 8: Light-emitting characteristics of OLEDs

[0681]

[0682]

[0683] As shown in Table 8, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0684] Example 97: Fabrication of OLED

[0685] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH9 of Formula 8 was used as the first host in the EML instead of GHH1.

[0686] Examples 98-108: Fabrication of OLEDs

[0687] OLEDs were manufactured using the same procedure and the same materials as in Example 97, except that GEH2 (for Ex. 98), GEH3 (for Ex. 99), GEH4 (for Ex. 100), GEH5 (for Ex. 101), GEH6 (for Ex. 102), GEH7 (for Ex. 103), GEH8 (for Ex. 104), GEH9 (for Ex. 105), GEH10 (for Ex. 106), GEH11 (for Ex. 107) and GEH12 (for Ex. 108) of Formula 11 were used as the second host in the EML instead of GEH1.

[0688] Test Example 9: Measurement of OLED Light Emitting Characteristics

[0689] The optical characteristics of each of the OLEDs manufactured in Examples 97 to 108 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 9 below.

[0690] Table 9: Light-emitting characteristics of OLEDs

[0691]

[0692] As shown in Table 9, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0693] Example 109: Fabrication of OLED

[0694] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH10 of Formula 8 was used as the first host in the EML instead of GHH1.

[0695] Examples 110-120: Fabrication of OLEDs

[0696] OLEDs were manufactured using the same procedure and the same materials as in Example 109, except that GEH2 (for Ex. 110), GEH3 (for Ex. 111), GEH4 (for Ex. 112), GEH5 (for Ex. 113), GEH6 (for Ex. 114), GEH7 (for Ex. 115), GEH8 (for Ex. 116), GEH9 (for Ex. 117), GEH10 (for Ex. 118), GEH11 (for Ex. 119), and GEH12 (for Ex. 120) of Formula 11 were used as the second host in the EML instead of GEH1.

[0697] Test Example 10: Measurement of OLED Light Emitting Characteristics

[0698] The optical characteristics of each of the OLEDs manufactured in Examples 109 to 120 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 10 below.

[0699] Table 10: Light-emitting characteristics of OLEDs

[0700]

[0701] As shown in Table 10, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0702] Example 121: Fabrication of OLED

[0703] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH11 of Formula 8 was used as the first host in the EML instead of GHH1.

[0704] Examples 122-132: Fabrication of OLEDs

[0705] OLEDs were manufactured using the same procedure and the same materials as in Example 121, except that GEH2 (for Ex. 122), GEH3 (for Ex. 123), GEH4 (for Ex. 124), GEH5 (for Ex. 125), GEH6 (for Ex. 126), GEH7 (for Ex. 127), GEH8 (for Ex. 128), GEH9 (for Ex. 129), GEH10 (for Ex. 130), GEH11 (for Ex. 131), and GEH12 (for Ex. 132) of Formula 11 were used as the second host in the EML instead of GEH1.

[0706] Test Example 11: Measurement of OLED Light Emitting Characteristics

[0707] The optical characteristics of each of the OLEDs manufactured in Examples 121 to 132 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 11 below.

[0708] Table 11: Light-emitting characteristics of OLEDs

[0709]

[0710] As shown in Table 11, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0711] Example 133: Fabrication of OLED

[0712] An OLED was fabricated using the same procedure and materials as in Example 1, except that GHH12 of Formula 8 was used as the first host in the EML instead of GHH1.

[0713] Examples 134-144: Fabrication of OLEDs

[0714] OLEDs were manufactured using the same procedure and the same materials as in Example 133, except that GEH2 (for Ex. 134), GEH3 (for Ex. 135), GEH4 (for Ex. 136), GEH5 (for Ex. 137), GEH6 (for Ex. 138), GEH7 (for Ex. 139), GEH8 (for Ex. 140), GEH9 (for Ex. 141), GEH10 (for Ex. 142), GEH11 (for Ex. 143), and GEH12 (for Ex. 144) of Formula 11 were used as the second host in the EML instead of GEH1.

[0715] Test Example 12: Measurement of OLED Light Emitting Characteristics

[0716] The optical characteristics of each of the OLEDs manufactured in Examples 133 to 144 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 12 below.

[0717] Table 12: Light-emitting characteristics of OLEDs

[0718]

[0719] As shown in Table 12, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0720] Example 145: Fabrication of OLED

[0721] An OLED was manufactured using the same procedure and materials as in Example 1, except that Compound 252 synthesized in Synthesis Example 16 was used as a dopant in the EML instead of Compound 251.

[0722] Examples 146-150: Fabrication of OLEDs

[0723] OLEDs were fabricated using the same procedure and materials as in Example 145, except that GEH2 (for Ex. 146), GEH3 (for Ex. 147), GEH4 (for Ex. 148), GEH5 (for Ex. 149), and GEH6 (for Ex. 150) of Formula 11 were used as the second host in the EML instead of GEH1.

[0724] Example 151: Fabrication of OLED

[0725] An OLED was manufactured using the same procedure and materials as in Example 145, except that GHH2 of Formula 8 was used as the first host in the EML instead of GHH1.

[0726] Examples 152-156: Fabrication of OLEDs

[0727] OLEDs were fabricated using the same procedure and materials as in Example 151, except that GEH2 (for Ex. 152), GEH3 (for Ex. 153), GEH4 (for Ex. 154), GEH5 (for Ex. 155), and GEH6 (for Ex. 156) of Formula 11 were used as the second host in the EML instead of GEH1.

[0728] Comparative Example 2 (Ref. 2): OLED Manufacturing

[0729] OLEDs were fabricated using the same procedure and materials as in Example 145, except that CBP (90 wt %) was used as the sole host in the EML instead of GHH1 and GEH1.

[0730] Test Example 13: Measurement of OLED Light Emitting Characteristics

[0731] The optical characteristics of each of the OLEDs manufactured in Examples 145 to 156 and Comparative Example 2 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 13 below.

[0732] Table 13: Light-emitting characteristics of OLEDs

[0733]

[0734]

[0735] As shown in Table 13, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0736] Example 157: Fabrication of OLED

[0737] An OLED was manufactured using the same procedure and materials as in Example 145, except that GHH3 of Formula 8 was used as the first host in the EML instead of GHH1.

[0738] Examples 158-162: Fabrication of OLEDs

[0739] OLEDs were manufactured using the same procedure and the same materials as in Example 157, except that GEH2 (for Ex. 158), GEH3 (for Ex. 159), GEH4 (for Ex. 160), GEH5 (for Ex. 161), and GEH6 (for Ex. 162) of Formula 11 were used as the second host in the EML instead of GEH1.

[0740] Example 163: Fabrication of OLED

[0741] An OLED was manufactured using the same procedure and the same materials as in Example 145, except that GHH4 of Formula 8 was used as the first host in the EML instead of GHH1.

[0742] Examples 164-168: Fabrication of OLEDs

[0743] OLEDs were manufactured using the same procedure and the same materials as in Example 163, except that GEH2 (for Ex. 164), GEH3 (for Ex. 165), GEH4 (for Ex. 166), GEH5 (for Ex. 167), and GEH6 (for Ex. 168) of Formula 11 were used as the second host in the EML instead of GEH1.

[0744] Test Example 14: Measurement of OLED Light Emitting Characteristics

[0745] The optical characteristics of each of the OLEDs manufactured in Examples 157 to 168 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 14 below.

[0746] Table 14: Light-emitting characteristics of OLEDs

[0747]

[0748] As shown in Table 14, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0749] Example 169: Fabrication of OLED

[0750] An OLED was manufactured using the same procedure and materials as in Example 145, except that GHH5 of Formula 8 was used as the first host in the EML instead of GHH1.

[0751] Examples 170-174: Fabrication of OLEDs

[0752] OLEDs were manufactured using the same procedure and the same materials as in Example 169, except that GEH2 (for Ex. 170), GEH3 (for Ex. 171), GEH4 (for Ex. 172), GEH5 (for Ex. 173), and GEH6 (for Ex. 174) of Formula 11 were used as the second host in the EML instead of GEH1.

[0753] Example 175: Fabrication of OLED

[0754] An OLED was fabricated using the same procedure and materials as in Example 145, except that GHH6 of Formula 8 was used as the first host in the EML instead of GHH1.

[0755] Examples 176-180: Fabrication of OLEDs

[0756] OLEDs were manufactured using the same procedure and the same materials as in Example 175, except that GEH2 (for Ex. 176), GEH3 (for Ex. 177), GEH4 (for Ex. 178), GEH5 (for Ex. 179), and GEH6 (for Ex. 180) of Formula 11 were used as the second host in the EML instead of GEH1.

[0757] Test Example 15: Measurement of OLED Light Emitting Characteristics

[0758] The optical characteristics of each of the OLEDs manufactured in Examples 169 to 180 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 15 below.

[0759] Table 15: Light-emitting characteristics of OLEDs

[0760]

[0761] As shown in Table 15, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0762] Example 181: Fabrication of OLED

[0763] An OLED was manufactured using the same procedure and materials as in Example 1, except that Compound 253 synthesized in Synthesis Example 17 was used as a dopant in the EML instead of Compound 251.

[0764] Examples 182-186: Fabrication of OLEDs

[0765] OLEDs were manufactured using the same procedure and the same materials as in Example 181, except that GEH2 (for Ex. 182), GEH3 (for Ex. 183), GEH4 (for Ex. 184), GEH5 (for Ex. 185), and GEH6 (for Ex. 186) of Formula 11 were used as the second host in the EML instead of GEH1.

[0766] Example 187: Fabrication of OLED

[0767] An OLED was manufactured using the same procedure and materials as in Example 181, except that GHH2 of Formula 8 was used as the first host in the EML instead of GHH1.

[0768] Examples 188-192: Fabrication of OLEDs

[0769] OLEDs were fabricated using the same procedure and materials as in Example 187, except that GEH2 (for Ex. 188), GEH3 (for Ex. 189), GEH4 (for Ex. 190), GEH5 (for Ex. 191), and GEH6 (for Ex. 192) of Formula 11 were used as the second host in the EML instead of GEH1.

[0770] Comparative Example 3 (Ref. 3): OLED Manufacturing

[0771] OLEDs were fabricated using the same procedure and materials as in Example 181, except that CBP (90 wt %) was used as the sole host in the EML instead of GHH1 and GEH1.

[0772] Test Example 16: Measurement of OLED Light Emitting Characteristics

[0773] The optical characteristics of each of the OLEDs manufactured in Examples 181 to 192 and Comparative Example 3 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 16 below.

[0774] Table 16: Light-emitting characteristics of OLEDs

[0775]

[0776] As shown in Table 16, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0777] Example 193: Fabrication of OLED

[0778] An OLED was manufactured using the same procedure and materials as in Example 181, except that GHH3 of Formula 8 was used as the first host in the EML instead of GHH1.

[0779] Examples 194-198: Fabrication of OLEDs

[0780] OLEDs were manufactured using the same procedure and the same materials as in Example 193, except that GEH2 (for Ex. 194), GEH3 (for Ex. 195), GEH4 (for Ex. 196), GEH5 (for Ex. 197), and GEH6 (for Ex. 198) of Formula 11 were used as the second host in the EML instead of GEH1.

[0781] Example 199: Fabrication of OLED

[0782] An OLED was manufactured using the same procedure and materials as in Example 181, except that GHH4 of Formula 8 was used as the first host in the EML instead of GHH1.

[0783] Examples 200-204: Fabrication of OLEDs

[0784] OLEDs were fabricated using the same procedure and materials as in Example 199, except that GEH2 (for Ex. 200), GEH3 (for Ex. 201), GEH4 (for Ex. 202), GEH5 (for Ex. 203), and GEH6 (for Ex. 204) of Formula 11 were used as the second host in the EML instead of GEH1.

[0785] Test Example 17: Measurement of OLED Light Emitting Characteristics

[0786] The optical characteristics of each of the OLEDs manufactured in Examples 193 to 204 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 17 below.

[0787] Table 17: Light-emitting characteristics of OLEDs

[0788]

[0789]

[0790] As shown in Table 17, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0791] Example 205: Fabrication of OLED

[0792] An OLED was fabricated using the same procedure and materials as in Example 181, except that GHH5 of Formula 8 was used as the first host in the EML instead of GHH1.

[0793] Examples 206-210: Fabrication of OLEDs

[0794] OLEDs were fabricated using the same procedure and materials as in Example 205, except that GEH2 (for Ex. 206), GEH3 (for Ex. 207), GEH4 (for Ex. 208), GEH5 (for Ex. 209), and GEH6 (for Ex. 210) of Formula 11 were used as the second host in the EML instead of GEH1.

[0795] Example 211: Fabrication of OLED

[0796] An OLED was manufactured using the same procedure and materials as in Example 181, except that GHH6 of Formula 8 was used as the first host in the EML instead of GHH1.

[0797] Examples 212-216: Fabrication of OLEDs

[0798] OLEDs were manufactured using the same procedure and the same materials as in Example 211, except that GEH2 (for Ex. 212), GEH3 (for Ex. 213), GEH4 (for Ex. 214), GEH5 (for Ex. 215), and GEH6 (for Ex. 216) of Formula 11 were used as the second host in the EML instead of GEH1.

[0799] Test Example 18: Measurement of OLED Light Emitting Characteristics

[0800] The optical characteristics of each of the OLEDs manufactured in Examples 205 to 216 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 18 below.

[0801] Table 18: Light-emitting characteristics of OLEDs

[0802]

[0803]

[0804] As shown in Table 18, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0805] Example 217: Fabrication of OLED

[0806] An OLED was manufactured using the same procedure and materials as in Example 1, except that Compound 254 synthesized in Synthesis Example 18 was used as a dopant in the EML instead of Compound 251.

[0807] Examples 218-222: Fabrication of OLEDs

[0808] OLEDs were manufactured using the same procedure and the same materials as in Example 217, except that GEH2 (for Ex. 218), GEH3 (for Ex. 219), GEH4 (for Ex. 220), GEH5 (for Ex. 221), and GEH6 (for Ex. 222) of Formula 11 were used as the second host in the EML instead of GEH1.

[0809] Example 223: Fabrication of OLED

[0810] An OLED was fabricated using the same procedure and materials as in Example 217, except that GHH2 of Formula 8 was used as the first host in the EML instead of GHH1.

[0811] Examples 224-228: Fabrication of OLEDs

[0812] OLEDs were manufactured using the same procedure and the same materials as in Example 223, except that GEH2 (for Ex. 224), GEH3 (for Ex. 225), GEH4 (for Ex. 226), GEH5 (for Ex. 227), and GEH6 (for Ex. 228) of Formula 11 were used as the second host in the EML instead of GEH1.

[0813] Comparative Example 4 (Ref. 4): Production of OLED

[0814] OLEDs were fabricated using the same procedure and materials as in Example 217, except that CBP (90 wt %) was used as the sole host in the EML instead of GHH1 and GEH1.

[0815] Test Example 19: Measurement of OLED Light Emitting Characteristics

[0816] The optical characteristics of each of the OLEDs manufactured in Examples 217 to 228 and Comparative Example 4 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 19 below.

[0817] Table 19: Light-emitting characteristics of OLEDs

[0818]

[0819] As shown in Table 19, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0820] Example 229: Fabrication of OLED

[0821] An OLED was manufactured using the same procedure and materials as in Example 217, except that GHH3 of Formula 8 was used as the first host in the EML instead of GHH1.

[0822] Examples 230-234: Fabrication of OLEDs

[0823] OLEDs were manufactured using the same procedure and the same materials as in Example 229, except that GEH2 (for Ex. 230), GEH3 (for Ex. 231), GEH4 (for Ex. 232), GEH5 (for Ex. 233), and GEH6 (for Ex. 234) of Formula 11 were used as the second host in the EML instead of GEH1.

[0824] Example 235: Fabrication of OLED

[0825] An OLED was manufactured using the same procedure and materials as in Example 217, except that GHH4 of Formula 8 was used as the first host in the EML instead of GHH1.

[0826] Examples 236-240: Fabrication of OLEDs

[0827] OLEDs were manufactured using the same procedure and materials as in Example 235, except that GEH2 (for Ex. 236), GEH3 (for Ex. 237), GEH4 (for Ex. 238), GEH5 (for Ex. 239), and GEH6 (for Ex. 240) of Formula 11 were used as the second host in the EML instead of GEH1.

[0828] Test Example 20: Measurement of OLED Light Emitting Characteristics

[0829] The optical characteristics of each of the OLEDs manufactured in Examples 229 to 240 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 20 below.

[0830] Table 20: Light-emitting characteristics of OLEDs

[0831]

[0832] As shown in Table 20, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0833] Example 241: Fabrication of OLED

[0834] An OLED was manufactured using the same procedure and materials as in Example 217, except that GHH5 of Formula 8 was used as the first host in the EML instead of GHH1.

[0835] Examples 242-246: Fabrication of OLEDs

[0836] OLEDs were manufactured using the same procedure and the same materials as in Example 241, except that GEH2 (for Ex. 242), GEH3 (for Ex. 243), GEH4 (for Ex. 244), GEH5 (for Ex. 245), and GEH6 (for Ex. 246) of Formula 11 were used as the second host in the EML instead of GEH1.

[0837] Example 247: Fabrication of OLED

[0838] An OLED was fabricated using the same procedure and materials as in Example 217, except that GHH6 of Formula 8 was used as the first host in the EML instead of GHH1.

[0839] Examples 248-252: Fabrication of OLEDs

[0840] OLEDs were manufactured using the same procedure and the same materials as in Example 247, except that GEH2 (for Ex. 248), GEH3 (for Ex. 249), GEH4 (for Ex. 250), GEH5 (for Ex. 251), and GEH6 (for Ex. 252) of Formula 11 were used as the second host in the EML instead of GEH1.

[0841] Test Example 21: Measurement of OLED Light Emitting Characteristics

[0842] The optical characteristics of each of the OLEDs manufactured in Examples 241 to 252 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 21 below.

[0843] Table 21: Light-emitting characteristics of OLEDs

[0844]

[0845] As shown in Table 21, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0846] Example 253: Fabrication of OLED

[0847] An OLED was manufactured using the same procedure and materials as in Example 1, except that Compound 255 synthesized in Synthesis Example 19 was used as a dopant in the EML instead of Compound 251.

[0848] Examples 254-258: Fabrication of OLEDs

[0849] OLEDs were fabricated using the same procedure and materials as in Example 253, except that GEH2 (for Ex. 254), GEH3 (for Ex. 255), GEH4 (for Ex. 256), GEH5 (for Ex. 257), and GEH6 (for Ex. 258) of Formula 11 were used as the second host in the EML instead of GEH1.

[0850] Example 259: Fabrication of OLED

[0851] An OLED was fabricated using the same procedure and materials as in Example 253, except that GHH2 of Formula 8 was used as the first host in the EML instead of GHH1.

[0852] Examples 260-264: Fabrication of OLEDs

[0853] OLEDs were manufactured using the same procedure and the same materials as in Example 259, except that GEH2 (for Ex. 260), GEH3 (for Ex. 261), GEH4 (for Ex. 262), GEH5 (for Ex. 263), and GEH6 (for Ex. 264) of Formula 11 were used as the second host in the EML instead of GEH1.

[0854] Comparative Example 5 (Ref. 5): OLED Manufacturing

[0855] OLEDs were fabricated using the same procedure and materials as in Example 253, except that CBP (90 wt %) was used as the sole host in the EML instead of GHH1 and GEH1.

[0856] Test Example 22: Measurement of OLED Light Emitting Characteristics

[0857] The optical characteristics of each of the OLEDs manufactured in Examples 253 to 264 and Comparative Example 5 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 22 below.

[0858] Table 22: Luminous properties of OLEDs

[0859]

[0860]

[0861] As shown in Table 22, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0862] Example 265: Fabrication of OLED

[0863] An OLED was fabricated using the same procedure and materials as in Example 253, except that GHH3 of Formula 8 was used as the first host in the EML instead of GHH1.

[0864] Examples 266-270: Fabrication of OLEDs

[0865] OLEDs were manufactured using the same procedure and the same materials as in Example 265, except that GEH2 (for Ex. 266), GEH3 (for Ex. 267), GEH4 (for Ex. 268), GEH5 (for Ex. 269), and GEH6 (for Ex. 270) of Formula 11 were used as the second host in the EML instead of GEH1.

[0866] Example 271 (Ex. 271): Fabrication of OLED

[0867] An OLED was fabricated using the same procedure and materials as in Example 253, except that GHH4 of Formula 8 was used as the first host in the EML instead of GHH1.

[0868] Examples 272-276: Fabrication of OLEDs

[0869] OLEDs were manufactured using the same procedure and the same materials as in Example 271, except that GEH2 (for Ex. 272), GEH3 (for Ex. 273), GEH4 (for Ex. 274), GEH5 (for Ex. 275), and GEH6 (for Ex. 276) of Formula 11 were used as the second host in the EML instead of GEH1.

[0870] Test Example 23: Measurement of OLED Light Emitting Characteristics

[0871] The optical characteristics of each of the OLEDs manufactured in Examples 265 to 276 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 23 below.

[0872] Table 23: Luminous properties of OLEDs

[0873]

[0874]

[0875] As shown in Table 23, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0876] Example 277: Fabrication of OLED

[0877] An OLED was fabricated using the same procedure and materials as in Example 253, except that GHH5 of Formula 8 was used as the first host in the EML instead of GHH1.

[0878] Examples 278-282: Fabrication of OLEDs

[0879] OLEDs were manufactured using the same procedure and the same materials as in Example 277, except that GEH2 (for Ex. 278), GEH3 (for Ex. 279), GEH4 (for Ex. 280), GEH5 (for Ex. 281), and GEH6 (for Ex. 282) of Formula 11 were used as the second host in the EML instead of GEH1.

[0880] Example 283: Fabrication of OLED

[0881] An OLED was fabricated using the same procedure and materials as in Example 253, except that GHH6 of Formula 8 was used as the first host in the EML instead of GHH1.

[0882] Examples 284-288: Fabrication of OLEDs

[0883] OLEDs were fabricated using the same procedure and materials as in Example 283, except that GEH2 (for Ex. 284), GEH3 (for Ex. 285), GEH4 (for Ex. 286), GEH5 (for Ex. 287), and GEH6 (for Ex. 288) of Formula 11 were used as the second host in the EML instead of GEH1.

[0884] Test Example 24: Measurement of OLED Light Emitting Characteristics

[0885] The optical characteristics of each of the OLEDs manufactured in Examples 277 to 288 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 24 below.

[0886] Table 24: Light-emitting characteristics of OLEDs

[0887]

[0888] As shown in Table 24, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT95 ) has been greatly improved.

[0889] Examples 289-298: Fabrication of OLEDs

[0890] OLEDs were manufactured using the same procedure and materials as in Example 1, except that in the EML, each of compounds 256, 257, 1, 2, and 27 was used as a dopant, GHH2 of Formula 8 was used as a first host, and GEH1 or GEH2 of Formula 11 was used as a second host, as shown in Table 25 below.

[0891] Comparative Example 6-10 (Ref. 6-10): Fabrication of OLED

[0892] OLEDs were fabricated using the same procedure and materials as for each of Examples 289-298, except that CBP was used as the sole host in the EML, as shown in Table 25 below.

[0893] Test Example 25: Measurement of OLED Light Emitting Characteristics

[0894] The optical characteristics of each of the OLEDs manufactured in Examples 289 to 298 and Comparative Examples 6 to 10 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 25 below.

[0895] Table 25: Light-emitting characteristics of OLEDs

[0896]

[0897] As shown in Table 25, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0898] Examples 299-308: Fabrication of OLEDs

[0899] OLEDs were manufactured using the same procedure and materials as in Example 1, except that in the EML, each of Compounds 16, 17, 32, 34, and 35 was used as a dopant, GHH2 of Formula 8 was used as a first host, and GEH1 or GEH2 of Formula 11 was used as a second host, as shown in Table 26 below.

[0900] Comparative Examples 11-15 (Ref. 11-15): Fabrication of OLEDs

[0901] OLEDs were fabricated using the same procedure and materials as for each of Examples 299-308, except that CBP was used as the sole host in the EML, as shown in Table 26 below.

[0902] Test Example 26: Measurement of OLED Light Emitting Characteristics

[0903] The optical characteristics of each of the OLEDs manufactured in Examples 299 to 308 and Comparative Examples 11 to 15 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 26 below.

[0904] Table 26: Light-emitting characteristics of OLEDs

[0905]

[0906]

[0907] As shown in Table 26, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0908] Examples 309-318: Fabrication of OLEDs

[0909] OLEDs were manufactured using the same procedure and materials as in Example 1, except that in the EML, each of compounds 136, 137, 142, 148, and 147 was used as a dopant, GHH2 of Formula 8 was used as a first host, and GEH1 or GEH2 of Formula 11 was used as a second host, as shown in Table 27 below.

[0910] Comparative Examples 16-20 (Ref. 16-20): Fabrication of OLEDs

[0911] OLEDs were fabricated using the same procedure and materials as for each of Examples 309-318, except that CBP was used as the sole host in the EML, as shown in Table 27 below.

[0912] Test Example 27: Measurement of OLED Light Emitting Characteristics

[0913] The optical characteristics of each of the OLEDs manufactured in Examples 309 to 318 and Comparative Examples 16 to 20 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 27 below.

[0914] Table 27: Luminous properties of OLEDs

[0915]

[0916]

[0917] As shown in Table 27, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0918] Examples 319-328: Fabrication of OLEDs

[0919] OLEDs were fabricated using the same procedure and materials as in Example 1, except that in the EML, each of Compounds 251-255 (10 wt %) was used as a dopant, and GHH2 or GHH4 of Formula 8 (90 wt %) was used as the sole host, as shown in Table 28 below.

[0920] Comparative Examples 21-25 (Ref. 21-25): Fabrication of OLEDs

[0921] OLEDs were fabricated using the same procedure and materials as each of Examples 319-328, except that CBP was used as the sole host in the EML, as shown in Table 28 below.

[0922] Test Example 28: Measurement of OLED Light Emitting Characteristics

[0923] The optical characteristics of each of the OLEDs manufactured in Examples 319 to 328 and Comparative Examples 21 to 25 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 28 below.

[0924] Table 28: Light-emitting characteristics of OLEDs

[0925]

[0926]

[0927] As shown in Table 28, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0928] Examples 329-338: Fabrication of OLEDs

[0929] OLEDs were manufactured using the same procedure and materials as in Example 1, except that compounds 256, 257, 1, 2, and 27 (10 wt %) were each used as a dopant in the EML, and GHH2 or GHH4 of Formula 8 (90 wt %) was used as the sole host, as shown in Table 29 below.

[0930] Comparative Examples 26-30 (Ref. 26-30): Fabrication of OLED

[0931] OLEDs were fabricated using the same procedure and materials as for each of Examples 329-338, except that CBP was used as the sole host in the EML, as shown in Table 29 below.

[0932] Test Example 29: Measurement of OLED Light Emitting Characteristics

[0933] The optical characteristics of each of the OLEDs manufactured in Examples 329 to 338 and Comparative Examples 26 to 30 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 29 below.

[0934] Table 29: Light-emitting characteristics of OLEDs

[0935]

[0936]

[0937] As shown in Table 29, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0938] Examples 339-348: Fabrication of OLEDs

[0939] OLEDs were manufactured using the same procedure and materials as in Example 1, except that compounds 16, 17, 32, 34, and 35 (10 wt %) were each used as a dopant in the EML, and GHH2 or GHH4 of Formula 8 (90 wt %) was used as the sole host, as shown in Table 30 below.

[0940] Comparative Examples 31-35 (Ref. 31-35): Fabrication of OLEDs

[0941] OLEDs were fabricated using the same procedure and materials as for each of Examples 339-348, except that CBP was used as the sole host in the EML, as shown in Table 30 below.

[0942] Test Example 30: Measurement of OLED Light Emitting Characteristics

[0943] The optical characteristics of each of the OLEDs manufactured in Examples 339 to 348 and Comparative Examples 31 to 35 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 30 below.

[0944] Table 30: Light-emitting characteristics of OLEDs

[0945]

[0946]

[0947] As shown in Table 30, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0948] Examples 349-358: Fabrication of OLEDs

[0949] OLEDs were manufactured using the same procedure and materials as in Example 1, except that compounds 136, 137, 142, 148, and 147 (10 wt %) were each used as a dopant in the EML, and GHH2 or GHH4 of Formula 8 (90 wt %) was used as the sole host, as shown in Table 31 below.

[0950] Comparative Examples 36-40 (Ref. 36-40): Fabrication of OLED

[0951] OLEDs were fabricated using the same procedure and materials as each of Examples 349-358, except that CBP was used as the sole host in the EML, as shown in Table 31 below.

[0952] Test Example 31: Measurement of OLED Light Emitting Characteristics

[0953] The optical characteristics of each of the OLEDs manufactured in Examples 349 to 358 and Comparative Examples 36 to 40 were measured using the same procedure as in Experimental Example 1. The measurement results are shown in Table 31 below.

[0954] Table 31: Light-emitting characteristics of OLEDs

[0955]

[0956]

[0957] As shown in Table 31, in the OLED whose EML includes the host and dopant of the present disclosure, the driving voltage is reduced and the EQE and luminescence lifetime (LT 95 ) has been greatly improved.

[0958] In summary, as shown in Tables 1-31, by introducing the host and dopant according to the present disclosure, an OLED may be realized that may have a lower driving voltage as well as improved luminous efficiency and luminous lifetime.

[0959] It will be apparent to those skilled in the art that various modifications and variations can be made to the present disclosure without departing from the scope of the invention. Therefore, the present disclosure is intended to cover modifications and variations of the present disclosure as long as they fall within the scope of the appended claims.

Claims

1. An organic light emitting diode, comprising: a first electrode; a second electrode facing the first electrode; and a light-emitting layer, the light-emitting layer being disposed between the first electrode and the second electrode and comprising at least one light-emitting material layer, the light-emitting material layer comprising: The subject includes: a first host having a structure represented by Formula 7, and a second host having a structure represented by Formula 9, and a dopant comprising an organometallic compound having a structure represented by Formula 1, in: Formula 1 is: [Formula 1] Go(L A ) m (L B ) n In formula 1, L A Having a structure represented by Formula 2; L B is an auxiliary ligand having a structure represented by Formula 5A or Formula 5B; m is 1 or 2; n is 1 or 2; and m+n is 3, Formula 2 is: [Formula 2] In formula 2, X1 is CR7, X2 is CR7 or N; X3 to X5 are each independently CR8; X6 to X9 are each independently CR9; R1 to R5, and R7 to R9 are each independently hydrogen or unsubstituted C1-C 20 Alkyl, R6 is unsubstituted or substituted C1-C 20 alkyl; a is 0 or 1; and b is 0, 1, or 2, Formula 7 is: [Formula 7] In formula 7, X is CR 43 R 44 , O or S, R 43 and R 44 Each independently is an unsubstituted C1-C 10 Alkyl, or R 43 and R 44 further linked together to form unsubstituted or substituted C6-C 30 Spiroaromatic ring or unsubstituted or substituted C3-C 30 spiroheteroaromatic ring; Z1 to Z4 are each independently CR 45 , R 45 are independently hydrogen, unsubstituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, or two adjacent R 45 Forming unsubstituted or substituted C6-C 30 aromatic rings; R 42 are independently hydrogen, unsubstituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl, or when p is 2, 3 or 4, two adjacent R 42 Formation of substituted C3-C 30 heteroaromatic rings; R 41 is hydrogen, unsubstituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl, where R 41 and R 45 At least one of the C6-C 30 Aryl, unsubstituted or substituted C3-C 30 Heteroaryl, and unsubstituted or substituted C6-C 30 At least one spiro aromatic ring, wherein when p is 2, 3 or 4, each R 42 Same or different from each other, L1 and L2 are each independently a single bond, an unsubstituted C6-C 30 Arylene, or unsubstituted C3-C 30 heteroarylene; and p is 0, 1, 2, 3, or 4, Formula 9 is: [Formula 9] In formula 9, R 51 to R 52 Each is independently unsubstituted or substituted C6-C 30 Aryl or unsubstituted or substituted C3-C 30 Heteroaryl, R 53 having a structure represented by Formula 10A or Formula 10B; Y1, Y2 and Y3 are each N; and L is a single bond, or an unsubstituted C6-C 30 aryl groups, Formula 10A is: [Formula 10A] Wherein in Formula 10A, The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9; R 61 to R 68 are independently hydrogen, or unsubstituted C1-C 10 alkyl, Or, R 61 to R 68 At least two adjacent groups in the further linked together to form an unsubstituted or substituted C6-C 30 aromatic rings, Formula 10B is: [Formula 10B] Wherein in Formula 10B, The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9; R 71 is unsubstituted or substituted C6-C 30 aryl; R 72 to R 78 are each independently hydrogen, or unsubstituted or substituted C1-C 10 alkyl, Or, R 72 to R 78 At least two adjacent groups in the further linked together to form an unsubstituted or substituted C6-C 30 Aromatic ring or unsubstituted C3-C 30 Heteroaromatic ring, or unsubstituted or substituted C6-C 30 Aromatic rings and unsubstituted C3-C 30 The heteroaromatic rings are each independently connected to an unsubstituted or substituted C6-C 20 The aromatic rings form a spiro structure; [Formula 5A] [Formula 5B] Wherein in Formula 5A and Formula 5B, R 21 、R 22 and R 31 to R 33 are independently hydrogen or unsubstituted C1-C 20 alkyl; and f and g are each 0, 1, 2, 3 or 4.

2. The organic light emitting diode according to claim 1, wherein the L A Having a structure represented by Formula 4A or Formula 4B: [Formula 4A] [Formula 4B] Wherein in Formula 4A and Formula 4B, Each of R1 to R6 and b is as defined in Formula 2; R 11 and R 12 are each independently hydrogen; R 13 are each independently hydrogen; R 14 are each independently hydrogen, or unsubstituted or substituted C1-C 20 alkyl; c is 0 or 1; d is 0, 1, 2, or 3; and e is 0, 1, 2, 3 or 4.

3. The organic light emitting diode according to claim 1, wherein the L A Having a structure represented by Formula 4C or Formula 4D: [Formula 4C] [Formula 4D] Wherein in Formula 4C and Formula 4D, Each of R1 to R6 and b is as defined in Formula 2; R 11 and R 12 are each independently hydrogen; R 13 are each independently hydrogen; R 14 are each independently hydrogen, or unsubstituted or substituted C1-C 20 alkyl; c is 0 or 1; d is 0, 1, 2, or 3; and e is 0, 1, 2, 3 or 4.

4. The organic light emitting diode according to claim 1 , wherein the organometallic compound comprises at least one of the following compounds:

5. The organic light emitting diode according to claim 1, wherein the first host is selected from the following compounds:

6. The organic light emitting diode according to claim 1, wherein the second host comprises at least one of the following compounds:

7. The organic light emitting diode according to claim 1, wherein the light emitting layer comprises: a first light-emitting portion, the first light-emitting portion being disposed between the first electrode and the second electrode and comprising a first light-emitting material layer; a second light-emitting portion, the second light-emitting portion being disposed between the first light-emitting portion and the second electrode and comprising a second light-emitting material layer; as well as a first charge generation layer, the first charge generation layer being provided between the first light emitting portion and the second light emitting portion; At least one of the first light-emitting material layer and the second light-emitting material layer includes the host and the dopant.

8. The organic light emitting diode according to claim 7, wherein the second light emitting material layer comprises: a first layer disposed between the first charge generation layer and the second electrode; and a second layer disposed between the first layer and the second electrode, and One of the first layer and the second layer includes the host and the dopant. 9 . The organic light emitting diode according to claim 8 , wherein the second light emitting material layer further comprises a third layer disposed between the first layer and the second layer.

10. The organic light emitting diode according to claim 7, wherein the light emitting layer further comprises: a third light-emitting portion disposed between the second light-emitting portion and the second electrode and comprising a third light-emitting material layer; as well as A second charge generation layer is provided between the second light emitting portion and the third light emitting portion.

11. The organic light emitting diode according to claim 10, wherein the second light emitting material layer comprises: a first layer disposed between the first charge generation layer and the second electrode; as well as a second layer disposed between the first layer and the second electrode, One of the first layer and the second layer includes the host and the dopant.

12. An organic light emitting diode, comprising: a first electrode; a second electrode facing the first electrode; and a light-emitting layer disposed between the first electrode and the second electrode, the light-emitting layer comprising: a first light-emitting portion, the first light-emitting portion being disposed between the first electrode and the second electrode and comprising a blue light-emitting material layer; a second light emitting portion provided between the first light emitting portion and the second electrode and including at least one light emitting material layer; and a first charge generation layer, the first charge generation layer being provided between the first light emitting portion and the second light emitting portion; in: The at least one light emitting material layer comprises: The subject includes: a first host having a structure represented by Formula 7, and a second host having a structure represented by Formula 9, and A dopant comprising an organometallic compound having a structure represented by Formula 1: Formula 1 is: [Formula 1] Go(L A ) m (L B ) n In formula 1, L A Having a structure represented by Formula 2; L B is an auxiliary ligand having a structure represented by Formula 5A or Formula 5B; m is 1 or 2; n is 1 or 2; and m+n is 3, Formula 2 is: [Formula 2] In formula 2, X1 is CR7, X2 is CR7 or N; X3 to X5 are each independently CR8; X6 to X9 are each independently CR9; R1 to R5, and R7 to R9 are each independently hydrogen or unsubstituted C1-C 20 Alkyl, R6 is unsubstituted or substituted C1-C 20 alkyl; a is 0 or 1; and b is 0, 1, or 2, Formula 7 is: [Formula 7] In formula 7, X is CR 43 R 44 , O or S, R 43 and R 44 Each independently is an unsubstituted C1-C 10 Alkyl, or R 43 and R 44 further linked together to form unsubstituted or substituted C6-C 30 Spiroaromatic ring or unsubstituted or substituted C3-C 30 spiroheteroaromatic ring; Z1 to Z4 are each independently CR 45 , R 45 are independently hydrogen, unsubstituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 Heteroaryl, or two adjacent R 45 Forming unsubstituted or substituted C6-C 30 aromatic rings; R 42 are independently hydrogen, unsubstituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl, or when p is 2, 3 or 4, two adjacent R 42 Formation of substituted C3-C 30 heteroaromatic rings; R 41 is hydrogen, unsubstituted C1-C 10 Alkyl, unsubstituted or substituted C6-C 30 Aryl, or unsubstituted or substituted C3-C 30 heteroaryl, where R 41 and R 45 At least one of the C6-C 30 Aryl, unsubstituted or substituted C3-C 30 Heteroaryl, and unsubstituted or substituted C6-C 30 At least one spiro aromatic ring, wherein when p is 2, 3 or 4, each R 42 Same or different from each other, L1 and L2 are each independently a single bond, an unsubstituted C6-C 30 Arylene, or unsubstituted C3-C 30 heteroarylene; and p is 0, 1, 2, 3, or 4, Formula 9 is: [Formula 9] In formula 9, R 51 to R 52 Each is independently unsubstituted or substituted C6-C 30 Aryl or unsubstituted or substituted C3-C 30 Heteroaryl, R 53 having a structure represented by Formula 10A or Formula 10B; Y1, Y2 and Y3 are each N; and L is a single bond or an unsubstituted C6-C 30 aryl groups, Formula 10A is: [Formula 10A] Wherein in Formula 10A, The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9; R 61 to R 68 are independently hydrogen, or unsubstituted C1-C 10 alkyl, Or, R 61 to R 68 At least two adjacent groups in the further linked together to form an unsubstituted or substituted C6-C 30 aromatic rings, Formula 10B is: [Formula 10B] Wherein in Formula 10B, The asterisk indicates the connection to L or the azine moiety including Y1 to Y3 in Formula 9; R 71 is unsubstituted or substituted C6-C 30 aryl; R 72 to R 78 are each independently hydrogen, or unsubstituted or substituted C1-C 10 alkyl, Or, R 72 to R 78 At least two adjacent groups in the further linked together to form an unsubstituted or substituted C6-C 30 Aromatic ring, or unsubstituted C3-C 30 Heteroaromatic ring, or unsubstituted or substituted C6-C 30 Aromatic rings and unsubstituted C3-C 30 The heteroaromatic rings are each independently connected to an unsubstituted or substituted C6-C 20 The aromatic rings form a spiro structure; [Formula 5A] [Formula 5B] Wherein in Formula 5A and Formula 5B, R 21 、R 22 and R 31 to R 33 are independently hydrogen or unsubstituted C1-C 20 alkyl; and f and g are each 0, 1, 2, 3 or 4.

13. The organic light emitting diode according to claim 12, wherein the L A Having a structure represented by Formula 4A or Formula 4B: [Formula 4A] [Formula 4B] Wherein in Formula 4A and Formula 4B, Each of R1 to R6 and b is as defined in Formula 2; R 11 and R 12 are each independently hydrogen; R 13 are each independently hydrogen; R 14 are each independently hydrogen, or unsubstituted or substituted C1-C 20 alkyl; c is 0 or 1; d is 0, 1, 2, or 3; and e is 0, 1, 2, 3 or 4.

14. The organic light emitting diode according to claim 12, wherein the L A Having a structure represented by Formula 4C or Formula 4D: [Formula 4C] [Formula 4D] Wherein in Formula 4C and Formula 4D, Each of R1 to R6 and b is as defined in Formula 2; R 11 and R 12 are each independently hydrogen; R 13 are each independently hydrogen; R 14 are each independently hydrogen, or unsubstituted or substituted C1-C 20 alkyl; c is 0 or 1; d is 0, 1, 2, or 3; and e is 0, 1, 2, 3 or 4.

15. The organic light emitting diode according to claim 12, wherein the at least one light emitting material layer further comprises: a first layer disposed between the first charge generation layer and the second electrode, the first layer comprising a red light emitting material layer, and A second layer is disposed between the first layer and the second electrode, the second layer including the host and the dopant. 16 . The organic light emitting diode according to claim 15 , wherein the at least one light emitting material layer further comprises a third layer disposed between the first layer and the second layer, and wherein the third layer comprises a yellow-green light emitting material layer.

17. The organic light emitting diode according to claim 12, wherein the light emitting layer further comprises: a third light emitting portion disposed between the second light emitting portion and the second electrode and including a blue light emitting material layer, and A second charge generation layer is provided between the second light emitting portion and the third light emitting portion.

18. The organic light emitting diode according to claim 17, wherein the at least one light emitting material layer further comprises: a first layer disposed between the first charge generation layer and the second electrode, the first layer comprising a red light emitting material layer, and A second layer is disposed between the first layer and the second electrode, the second layer including the host and the dopant. 19 . The organic light emitting diode according to claim 18 , wherein the at least one light emitting material layer further comprises a third layer disposed between the first layer and the second layer, and wherein the third layer comprises a yellow-green light emitting material layer.

20. An organic light-emitting device, comprising: substrate; and The organic light emitting diode according to claim 1 is disposed on the substrate.

21. An organic light-emitting device, comprising: substrate; and The organic light emitting diode according to claim 12 is disposed on the substrate.

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