Organic electroluminescent element

Abstract

To provide a novel organic electroluminescent element.SOLUTION: An organic electroluminescent element includes an anode, a cathode, and a luminescent layer provided between the anode and the cathode. The luminescent layer includes at least a first compound having a structure represented by formula 1, 2 or 3, a second compound having a structure represented by formula 4, and a third compound including a ligand having a specific structure. The element has higher element efficiency, longer service life and better element performance.SELECTED DRAWING: None

Description

[Technical field]

[0001] The present invention relates to an organic electronic device, such as an organic light emitting device, and in particular to an organic electroluminescent device in which an organic layer includes a first compound, a second compound and a third compound. [Background technology]

[0002] Organic electronic devices include, but are not limited to, organic light emitting diodes (OLEDs), organic field effect transistors (O-FETs), organic light emitting transistors (OLETs), organic photovoltaic cells (OPVs), dye-sensitized solar cells (DSSCs), organic photodetectors, organic photosensitive devices, organic field effect devices (OFQDs), light emitting electrochemical cells (LECs), organic laser diodes, and organic plasma light emitting devices.

[0003] In 1987, Tang and Van Slyke of Eastman Kodak reported a bilayer organic electroluminescent device containing an arylamine hole transport layer and a tris-8-hydroxyquinoline-aluminum layer as the electron transport layer and the light emitting layer (Applied Physics Letters, 1987, 51(12):913-915). Once a bias is applied to the device, green light is emitted from the device. This invention laid the foundation for the development of modern organic light emitting diodes (OLEDs). The most advanced OLEDs may contain multiple layers, such as charge injection and transport layers, charge and exciton blocking layers, and one or more light emitting layers between the cathode and anode. OLEDs are self-emissive solid-state devices, offering enormous potential for display and lighting applications. Also, the inherent properties of organic materials, such as their flexibility, make them highly suitable for specialized applications, such as fabrication on flexible substrates.

[0004] OLEDs are divided into three different types according to their emission mechanism. The OLED invented by Tang and van Slyke is a fluorescent OLED, which uses only singlet emission. This limitation impedes the commercialization of OLEDs, since the triplets generated in the device are wasted through non-radiative decay pathways, and the internal quantum efficiency (IQE) of fluorescent OLEDs is only 25%. In 1997, Forrest and Thompson reported phosphorescent OLEDs that use triplet emission from heavy metal containing complexes as emitters. Therefore, singlets and triplets can be harvested and an IQE of 100% can be achieved. Due to their high efficiency, the discovery and development of phosphorescent OLEDs directly contributes to the commercialization of active matrix OLEDs (AMOLEDs). Recently, Adachi has achieved high efficiency through thermally activated delayed fluorescence (TADF) of organic compounds. These emitters have a small singlet-triplet gap, which allows the exciton to transition from triplet back to singlet. In TADF devices, the IQE is high due to the generation of singlet excitons by triplet excitons threading between reverse systems (reverse intersystem crossing).

[0005] OLEDs can be further divided into small molecule and polymer OLEDs depending on the form of the material required. Small molecules refer to materials that are not polymeric, either organic or organometallic, and the molecular weight of small molecules can be large as long as they have a precise structure. Dendrimers, which have a well-defined structure, are considered small molecules. Polymer OLEDs include conjugated polymers and non-conjugated polymers with side-chain emissive groups. Small molecule OLEDs can become polymer OLEDs when post-polymerization occurs during the manufacturing process.

[0006] Various methods for manufacturing OLEDs are known. Small molecule OLEDs are generally manufactured by vacuum thermal evaporation. Polymer OLEDs are manufactured by solution processes such as spin coating, inkjet printing and nozzle printing. Small molecule OLEDs can also be manufactured by solution processes if the material can be dissolved or dispersed in a solvent.

[0007] The emission color of an OLED can be achieved by the structural design of the emitting material. An OLED may include one or more emitting layers to achieve a desired spectrum. In green, yellow, and red OLEDs, phosphorescent materials have already been successfully commercialized, but blue phosphorescent elements still have problems such as blue not being saturated, short service life, and high operating voltage. Commercial full-color OLED displays generally use a mixed strategy, using blue fluorescence and yellow, red, or green phosphorescence. Currently, there is a problem that the efficiency of phosphorescent OLEDs drops rapidly at high brightness. It is also desirable to have a more saturated emission spectrum, higher efficiency, and longer device service life.

[0008] In the invention JP2021176839A previously submitted by the applicant,

[0009] [ka] The present invention discloses a metal complex containing a ligand having the structure. In the examples, the metal complex is

[0010] [ka] and

[0011] [ka] In this application, two combination elements with two different host materials are disclosed. This application focuses on the metal complex itself, but does not disclose or discuss the special advantages when the phosphorescent material of the specific structure is used together with a plurality of host materials having the specific structure.

[0012] In order to meet the ever-increasing needs of the performance of electroluminescent devices in the industry, such as luminous complexion, luminous color saturation, driving voltage, luminous efficiency, device service life, etc., the relevant research on phosphorescent devices is still urgently required. In the research on phosphorescent devices, the combination of phosphorescent light-emitting material and host material is very important, and the selection of the combination of phosphorescent light-emitting material and host material is directly related to the luminescent performance of the device. Therefore, the selection and optimization of the combination of phosphorescent light-emitting material and host material has become an important part of the relevant research in the industry. [Prior art documents] [Patent documents]

[0013] [Patent Document 1] Patent Publication No. 2021-176839 [Non-patent literature]

[0014] [Non-Patent Document 1] Applied Physics Letters, 1987, 51(12):913~915 Summary of the Invention [Problem to be solved by the invention]

[0015] The present invention aims to provide a series of novel electroluminescent devices to solve at least part of the above-mentioned problems. Because a novel compound combination is used in the light-emitting layer, the novel electroluminescent devices have higher device efficiency, longer device life, and better device performance, the novel electroluminescent devices include a first compound having a structure represented by formula 1, formula 2, or formula 3, a second compound having a structure represented by formula 4, and a third compound containing a ligand having a structure represented by formula 5. [Means for solving the problem]

[0016] According to one embodiment of the present invention, An anode; A cathode; an electroluminescent element including an emitting layer provided between the anode and the cathode, the emitting layer including a first compound, a second compound, and a third compound; The first compound has a structure represented by Formula 1, Formula 2, or Formula 3,

[0017] [ka] W may be the same or different for each occurrence, and may be C, CR w or N, and adjacent substituents R w may be bonded to form a ring, L is the same or different at each occurrence and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; R ware each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, The second compound has a structure represented by formula 4:

[0018] [ka] In formula 4, L 1 ~L 3 are the same or different and are selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar 1 ~Ar 3are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; The third compound comprises a metal having a relative atomic mass greater than 40 and a ligand L a wherein the ligand L a has a structure represented by formula 5,

[0019] [ka] In formula 5, ring A and ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms, or a heteroaromatic ring having 3 to 30 carbon atoms; R i each occurrence is the same or different and represents mono-, multi- or no substitution; R ii represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; Y is SiR y R y , G.E.R. y R y , N.R. y , P.R. y , O, S or Se; two R y When both exist simultaneously, two R y may be the same or different, X 1 ~X 2 CR may be the same or different for each occurrence. x or N, R, R i , R ii , R x and R yeach occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 2 to 2 ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R i , R x , R y , R and R ii may be linked to form a ring.

[0020] According to another embodiment of the present invention, there is further disclosed an electronic device including the electroluminescent device described in the above embodiment.

[0021] According to another embodiment of the present invention, there is further disclosed a composition comprising the first compound, the second compound, and the third compound described in the above embodiments.

[0022] The novel electroluminescent device of the present invention has higher device efficiency, longer device life, and better device performance because a novel combination of compounds including a first compound having a structure represented by Formula 1, Formula 2, or Formula 3, a second compound having a structure represented by Formula 4, and a third compound containing a ligand having a structure represented by Formula 5 is used in the light-emitting layer. [Brief description of the drawings]

[0023] [Figure 1] 1 is a schematic diagram of an organic light emitting device that may include an electroluminescent element according to the present invention; [Diagram 2] 2 is a schematic diagram of another organic light emitting device that may include an electroluminescent element according to the present invention; DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] OLEDs can be fabricated on a variety of substrates, such as glass, plastic, and metal. FIG. 1 shows an organic light-emitting device 100 by way of example and without limitation. The drawings are not necessarily drawn to scale, and some layer structures may be omitted in the drawings, as necessary. The device 100 may include a substrate 101, an anode 110, a hole injection layer 120, a hole transport layer 130, an electron blocking layer 140, an emissive layer 150, a hole blocking layer 160, an electron transport layer 170, an electron injection layer 180, and a cathode 190. The device 100 may be fabricated by depositing the layers described, in order. The properties, functions, and exemplary materials of each layer are described in more detail in columns 6-10 of US Pat. No. 7,279,704 B2, the entire contents of which are incorporated herein by reference.

[0025] There are many examples of each of these layers. Illustratively, a flexible and transparent substrate-anode combination is disclosed in U.S. Patent No. 5,844,363, which is incorporated by reference in its entirety. For example, in U.S. Patent Application Publication No. 2003 / 0230980, which is incorporated by reference in its entirety, an example of a p-type doped hole transport layer is a 50:1 molar ratio of F 4-TCNQ doped m-MTDATA. Examples of host materials are disclosed in U.S. Patent No. 6,303,238 to Thompson et al., which is incorporated by reference in its entirety. For example, U.S. Patent Application Publication No. 2003 / 0230980, which is incorporated by reference in its entirety, discloses an example of an n-type doped electron transport layer as BPhen doped with Li at a molar ratio of 1:1. Examples of cathodes include composite cathodes having a thin metal layer, such as Mg:Ag, and a sputter-deposited transparent conductive ITO layer coated thereon, in U.S. Patent No. 5,703,436 and U.S. Patent Application Publication No. 5,707,745, which are incorporated by reference in their entirety. The principles and use of blocking layers are described in more detail in U.S. Patent No. 6,097,147 and U.S. Patent Application Publication No. 2003 / 0230980, which are incorporated by reference in their entirety. Examples of injection layers are provided in U.S. Patent Application Publication No. 2004 / 0174116, which is incorporated by reference in its entirety. Protective layers are described in U.S. Patent Application Publication No. 2004 / 0174116, which is incorporated by reference in its entirety.

[0026] The above-mentioned split-layer structure is provided by way of non-limiting examples. The functions of the OLED can be realized by combining the various layers described above, or some layers can be omitted entirely. It may also include other layers not explicitly described. Within each layer, a single material or a mixture of multiple materials can be used to achieve optimal performance. Any of the functional layers may include multiple sub-layers, for example, an emitting layer may have two layers of different emitting materials to achieve a desired emission spectrum.

[0027] In one embodiment, an OLED may be described as having an "organic layer" disposed between a cathode and an anode. The organic layer may include one or more layers.

[0028] An OLED also requires an encapsulation layer, and as shown in FIG. 2, an organic light-emitting device 200 is shown by way of example and not by way of limitation. The difference from FIG. 1 is that it may include an encapsulation layer 102 on the cathode 190 to prevent harmful substances from the outside, such as moisture and oxygen. Any material that can provide an encapsulation function, such as glass or an organic-inorganic mixed layer, may be used as the encapsulation layer. The encapsulation layer should be disposed directly or indirectly on the outside of the OLED element. Multilayer thin-film encapsulation is described in U.S. Pat. No. US7968146B2, the entire contents of which are incorporated herein by reference.

[0029] Devices manufactured according to embodiments of the invention may be incorporated into a variety of consumer products having one or more electronic modules (or units) of the device, including, for example, flat panel displays, monitors, medical monitors, televisions, billboards, indoor or outdoor lighting and / or signaling lamps, heads-up displays, fully or partially transparent displays, flexible displays, smart phones, flat panel computers, flat panel mobile phones, wearable devices, smart watches, laptop computers, digital cameras, handheld video cameras, viewfinders, microdisplays, 3-D displays, in-vehicle displays, and tail lights.

[0030] The materials and structures described herein may also be used in the other organic electronic devices listed above.

[0031] "Top" means furthest from the substrate and "bottom" means closest to the substrate. When a first layer is described as being "on" a second layer, the first layer is described as being relatively far from the substrate. There may be other layers between the first and second layers, unless the first layer is specified as being "in contact with" the second layer. Illustratively, the cathode may still be described as being "on" the anode, even if there are various organic layers between the cathode and anode.

[0032] "Solution processable" means capable of being dissolved, dispersed or transported in and / or deposited from a liquid medium in the form of a solution or suspension.

[0033] It is believed that if a ligand directly enhances the photosensitizing properties of the emissive material, it may be referred to as "photosensitizing." If a ligand does not enhance the photosensitizing properties of the emissive material, it may be referred to as "auxiliary." However, it is believed that the auxiliary ligand may modify the properties of the photosensitizing ligand.

[0034] It is believed that the internal quantum efficiency (IQE) of fluorescent OLEDs may exceed the 25% spin-statistic limit due to the presence of delayed fluorescence. Delayed fluorescence may be generally divided into two types: P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence is generated by triplet-triplet annihilation (TTA).

[0035] On the other hand, E-type delayed fluorescence depends on the conversion of excited states between triplet and singlet, not on the collision of two triplets. Compounds capable of generating E-type delayed fluorescence need to have an extremely small singlet-triplet gap to allow the conversion of energy states. Thermal energy can activate the transition from triplet to singlet. This type of delayed fluorescence is also called thermally activated delayed fluorescence (TADF). The notable feature of TADF is that the delayed component increases with increasing temperature. If the rate of penetration (reverse intersystem crossing) between reverse systems (RISC) is fast enough, the proportion of backfilled singlet excited states can reach 75%, minimizing non-radiative decay from triplets. The total proportion of singlets can be 100%, far exceeding the 25% of exciton spin statistics due to electrochemical.

[0036] The characteristic of E-type delayed fluorescence can be seen from an excited complex system or a single compound. Without being limited to theory, E-type delayed fluorescence is observed when the emissive material has a small singlet-triplet energy gap (ΔE S-T) for the luminescent devices. Organic non-metal-containing donor-acceptor luminescent materials have the potential to achieve this. The emission of these materials is typically characterized as donor-acceptor charge transition (CT) type emission. In these donor-acceptor compounds, the spatial separation between the HOMO and LUMO is generally small, with a ΔE S-T These states may include CT states. Typically, donor-acceptor emissive materials are constructed by combining an electron donor moiety (e.g., an amine group or a carbazole derivative) with an electron acceptor moiety (e.g., an N-containing six-membered aromatic ring).

[0037] Definitions of Substituent Terminology

[0038] Halogen or halide, as used herein, includes fluorine, chlorine, bromine and iodine.

[0039] As used herein, alkyl groups include straight and branched chain alkyl groups. The alkyl groups may be alkyl groups having 1 to 20 carbon atoms, preferably alkyl groups having 1 to 12 carbon atoms, and more preferably alkyl groups having 1 to 6 carbon atoms. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, and 3-methylpentyl. Of these, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl and n-hexane are preferred. The alkyl group may be optionally substituted.

[0040] As used herein, the cycloalkyl group includes cyclic alkyl groups. The cycloalkyl group may be a cycloalkyl group having 3 to 20 ring carbon atoms, and is preferably a cycloalkyl group having 4 to 10 carbon atoms. Examples of the cycloalkyl group include cyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl, 1-adamantyl, 2-adamantyl, 1-norbornyl group, and 2-norbornyl group. Of these, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, and 4,4-dimethylcyclohexyl are preferred. The cycloalkyl group may be substituted.

[0041] As used herein, a heteroalkyl group is one in which one or more carbons in an alkyl chain are replaced with a heteroatom selected from the group consisting of a nitrogen atom, an oxygen atom, a sulfur atom, a selenium atom, a phosphorus atom, a silicon atom, a germanium atom, and a boron atom. The heteroalkyl group may be a heteroalkyl group having 1 to 20 carbon atoms, preferably a heteroalkyl group having 1 to 10 carbon atoms, and more preferably a heteroalkyl group having 1 to 6 carbon atoms. Examples of heteroalkyl groups include methoxymethyl, ethoxymethyl, ethoxyethyl, methylthiomethyl, ethylthiomethyl, ethylthioethyl, methoxymethoxymethyl, ethoxymethoxymethyl, ethoxyethoxyethyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, mercaptomethyl, mercaptoethyl, mercaptopropyl, aminomethyl, aminoethyl, aminopropyl, dimethylaminomethyl, trimethylgermanylmethyl, trimethylgermanylethyl, trimethylgermanylisopropyl, dimethylethylgermanylmethyl, dimethylisopropylgermanylmethyl, tert-butyldimethylgermanylmethyl, triethylgermanylmethyl, triethylgermanylethyl, triisopropylgermanylmethyl, triisopropylgermanylethyl, trimethylsilylmethyl, trimethylsilylethyl, trimethylsilylisopropyl, triisopropylsilylmethyl, and triisopropylsilylethyl. Heteroalkyl groups may also be substituted.

[0042] As used herein, alkenyl groups include linear, branched and cyclic olefin groups. The linear alkenyl group may be an alkenyl group having 2 to 20 carbon atoms, and preferably an alkenyl group having 2 to 10 carbon atoms. Examples of alkenyl groups include vinyl, propylene, 1-butenyl, 2-butenyl, 3-butenyl, 1,3-butadienyl, 1-methylvinyl, styryl, 2,2-diphenylvinyl, 1,2-diphenylvinyl, 1-methylallyl, 1,1-dimethylallyl, 2-methylallyl, 1-phenylallyl, 2-phenylallyl, 3-phenylallyl, 3,3-diphenylallyl, 1,2-dimethylallyl, 1-phenyl-1-butenyl, 3-phenyl-1-butenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctatetraenyl and norbornylalkenyl groups. The alkenyl group may be substituted.

[0043] As used herein, the term "alkynyl group" includes linear alkynyl groups. The alkynyl group may be an alkynyl group having 2 to 20 carbon atoms, and is preferably an alkynyl group having 2 to 10 carbon atoms. Examples of the alkynyl group include an ethynyl group, a propynyl group, a propargyl group, a 1-butynyl group, a 2-butynyl group, a 3-butynyl group, a 1-pentynyl group, a 2-pentynyl group, a 3,3-dimethyl-1-butynyl group, a 3-ethyl-3-methyl-1-pentynyl group, a 3,3-diisopropyl-1-pentynyl group, a phenylethynyl group, and a phenylpropynyl group. Among these, an ethynyl group, a propynyl group, a propargyl group, a 1-butynyl group, a 2-butynyl group, a 3-butynyl group, a 1-pentynyl group, and a phenylethynyl group are preferred. The alkynyl group may be substituted.

[0044] As used herein, aryl or aromatic groups contemplate non-condensed and condensed systems. The aryl group may be an aryl group having 6 to 30 carbon atoms, preferably an aryl group having 6 to 20 carbon atoms, and more preferably an aryl group having 6 to 12 carbon atoms. Examples of aryl groups include phenyl, biphenyl, terphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenalene, phenanthrene, fluorene, pyrene, chrysene, perylene, and azulene, and are preferably phenyl, biphenyl, terphenyl, triphenylene, fluorene, and naphthalene. Examples of non-fused aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-tribiphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-tolyl, m-tolyl, p-tolyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenyl, 4''-tert-butyl-p-terphenyl-4-yl, o-cumyl, m-cumyl, p-cumyl, 2,3-xylyl, 3,4-xylyl, 2,5-dimethylphenyl, mesitylene and m-tetraphenyl. The aryl group may also be substituted.

[0045] Heterocyclic group or heterocycle, as used herein, refers to a non-aromatic cyclic group. Non-aromatic heterocyclic groups include saturated heterocyclic groups having 3 to 20 ring atoms and unsaturated non-aromatic heterocyclic groups having 3 to 20 ring atoms, at least one ring atom of which is selected from the group consisting of nitrogen, oxygen, sulfur, selenium, silicon, phosphorus, germanium and boron atoms, and non-aromatic heterocyclic groups preferably have 3 to 7 ring atoms and contain at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxiranyl, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, dioxopentyl, dioxanyl, aziridinyl, dihydropyrrole, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxacycloheptatrienyl, thiacycloheptatrienyl, azacycloheptatrienyl, and tetrahydrosilole. Heterocyclic groups may also be substituted.

[0046] Heteroaryl groups, as used herein, may include non-fused and fused heteroaromatic groups having 1 to 5 heteroatoms, at least one of which is selected from the group consisting of nitrogen, oxygen, sulfur, selenium, silicon, phosphorus, germanium, and boron. Isoaryl groups also refer to heteroaryl groups. Heteroaryl groups may be heteroaryl groups having 3 to 30 carbon atoms, preferably heteroaryl groups having 3 to 20 carbon atoms, and more preferably heteroaryl groups having 3 to 12 carbon atoms. Suitable heteroaryl groups are dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indolocarbazole, pyridoindole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indenoazine, benzoxazole, benzisoxazole, Heteroaryl groups include benzothiazole, quinoline, isoquinoline, cinnoline, quinazoline, quinoxaline, naphthyridine, phthalazine, pteridine, xanthene, acridine, phenazine, phenothiazine, benzofuranpyridine, frangipyridine, benzothienopyridine, thienobipyridine, benzoselenopyridine, and selenobenzopyridine, and preferably include dibenzothiophene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, triazine, benzimidazole, 1,2-azaborane, 1,3-azaborane, 1,4-azaborane, borazole, and their aza analogues. Heteroaryl groups may also be substituted.

[0047] As used herein, the alkoxy group is represented by -O-alkyl group, -O-cycloalkyl group, -O-heteroalkyl group, or -O-heterocyclic group. Examples and preferred examples of the alkyl group, cycloalkyl group, heteroalkyl group, and heterocyclic group are the same as those mentioned above. The alkoxy group may be an alkoxy group having 1 to 20 carbon atoms, and is preferably an alkoxy group having 1 to 6 carbon atoms. Examples of the alkoxy group include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, tetrahydrofuranyloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy, and ethoxymethyloxy. The alkoxy group may be substituted.

[0048] As used herein, the aryloxy group is represented by -O-aryl group or -O-heteroaryl group. Examples and preferred examples of the aryl group and the heteroaryl group are the same as those mentioned above. The aryloxy group may be an aryloxy group having 6 to 30 carbon atoms, and is preferably an aryloxy group having 6 to 20 carbon atoms. Examples of the aryloxy group include phenoxy and biphenoxy. The aryloxy group may be substituted.

[0049] As used herein, the term "aralkyl group" includes an alkyl group substituted with an aryl group. The aralkyl group may be an aralkyl group having 7 to 30 carbon atoms, preferably an aralkyl group having 7 to 20 carbon atoms, and more preferably an aralkyl group having 7 to 13 carbon atoms. Examples of the aralkyl group include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl-tert-butyl, α-naphthylmethyl, 1-α-naphthylethyl, 2-α-naphthylethyl, 1-α-naphthylisopropyl, 2-α-naphthylisopropyl, β-naphthylmethyl, 1-β-naphthyl-ethyl, 2-β-naphthyl-ethyl, 1-β-naphthylisopropyl, 2-β-naphthylisopropyl, p-methylbenzyl, m-methylbenzyl, o-methylbenzyl, p-chlorobenzyl, m-chlorobenzyl, o ... Aralkyl groups include chlorobenzyl, o-chlorobenzyl, p-bromobenzyl, m-bromobenzyl, o-bromobenzyl, p-iodobenzyl, m-iodobenzyl, o-iodobenzyl, p-hydroxybenzyl, m-hydroxybenzyl, o-hydroxybenzyl, p-aminobenzyl, m-aminobenzyl, o-aminobenzyl, p-nitrobenzyl, m-nitrobenzyl, o-nitrobenzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-hydroxy-2-phenylisopropyl and 1-chloro-2-phenylisopropyl. Among them, benzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl and 2-phenylisopropyl are preferred. The aralkyl group may also be substituted.

[0050] As used herein, the term "alkylsilyl group" includes silyl groups substituted with an alkyl group. The alkylsilyl group may be an alkylsilyl group having 3 to 20 carbon atoms, and is preferably an alkylsilyl group having 3 to 10 carbon atoms. Examples of the alkylsilyl group include trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyl-tert-butylsilyl, and methyldi-tert-butylsilyl. The alkylsilyl group may also be substituted.

[0051] As used herein, the term "arylsilyl group" includes a silyl group substituted with at least one aryl group. The arylsilyl group may be an arylsilyl group having 6 to 30 carbon atoms, and is preferably an arylsilyl group having 8 to 20 carbon atoms. Examples of the arylsilyl group include triphenylsilyl, phenyl dibiphenylsilyl, diphenyl biphenylsilyl, phenyl diethylsilyl, diphenyl ethylsilyl, phenyl dimethylsilyl, diphenyl methylsilyl, phenyl diisopropylsilyl, diphenyl isopropylsilyl, diphenyl butylsilyl, diphenyl isobutylsilyl, and diphenyl-tert-butylsilyl. The arylsilyl group may be substituted.

[0052] As used herein, the term "alkyl germanium group" includes a germanium group substituted with an alkyl group. The alkyl germanium group may be an alkyl germanium group having 3 to 20 carbon atoms, and is preferably an alkyl germanium group having 3 to 10 carbon atoms. Examples of the alkyl germanium group include a trimethyl germanium group, a triethyl germanium group, a methyldiethyl germanium group, an ethyldimethyl germanium group, a tripropyl germanium group, a tributyl germanium group, a triisopropyl germanium group, a methyldiisopropyl germanium group, a dimethylisopropyl germanium group, a tri-tert-butyl germanium group, a triisobutyl germanium group, a dimethyl-tert-butyl germanium group, and a methyldi-tert-butyl germanium group. The alkyl germanium group may be substituted.

[0053] As used herein, the term "arylgermanium group" includes a germanium group substituted with at least one aryl group or heteroaryl group. The arylgermanium group may be an aryl group germanium group having 6 to 30 carbon atoms, and is preferably an arylgermanium group having 8 to 20 carbon atoms. Examples of the arylgermanium group include a triphenylgermanium group, a phenyldibiphenylgermanium group, a diphenylbiphenylgermanium group, a phenyldiethylgermanium group, a diphenylethylgermanium group, a phenyldimethylgermanium group, a diphenylmethylgermanium group, a phenyldiisopropylgermanium group, a diphenylisopropylgermanium group, a diphenylbutylgermanium group, a diphenylisobutylgermanium group, and a diphenyl-tert-butylgermanium group. The arylgermanium group may also be substituted.

[0054] The "aza" in azadibenzofuran, azadibenzothiophene, etc. refers to the replacement of one or more CH groups in the corresponding aromatic fragment with a nitrogen atom. For example, azatriphenylene includes dibenzo[f,h]quinoxaline, dibenzo[f,h]quinoline, and other analogs having two or more nitrogens in the ring system. Those skilled in the art can easily imagine other nitrogen analogs of the above-mentioned aza derivatives, and all of these analogs are defined as being included in the terminology described herein.

[0055] In the present invention, unless otherwise specified, the following groups are included: a substituted alkyl group, a substituted cycloalkyl group, a substituted heteroalkyl group, a substituted heterocyclic group, a substituted aralkyl group, a substituted alkoxy group, a substituted aryloxy group, a substituted alkenyl group, a substituted alkynyl group, a substituted aryl group, a substituted heteroaryl group, a substituted alkylsilyl group, a substituted arylsilyl group, a substituted alkylgermanium group, a substituted arylgermanium group, a substituted amino group, a substituted acyl group, a substituted carbonyl group, a substituted carboxyl group, a substituted ester group, a substituted sulfide group, a substituted aryl ... When any of the terms from the group consisting of an alkyl group, a cycloalkyl group, a heteroalkyl group, a heterocyclyl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkylsilyl group, an arylsilyl group, an alkylgermanium group, an arylgermanium group, an amino group, an acyl group, a carbonyl group, a carboxyl group, an ester group, a sulfinyl group, a sulfonyl group, and a phosphino group is used, the term can refer to any one of an alkyl group, a cycloalkyl group, a heteroalkyl group, a heterocyclyl group, an aralkyl group, an alkoxy group, an aryloxy group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkylsilyl group, an arylsilyl group, an alkylgermanium group, an arylgermanium group, an amino group, an acyl group, a carbonyl group, a carboxyl group, an ester group, a sulfinyl group, a sulfonyl group, and a phosphino group. is selected from the group consisting of deuterium, halogen, unsubstituted alkyl groups having 1 to 20 carbon atoms, unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, unsubstituted heteroalkyl groups having 1 to 20 carbon atoms, unsubstituted heterocyclic groups having 3 to 20 ring atoms, unsubstituted aralkyl groups having 7 to 30 carbon atoms, unsubstituted alkoxy groups having 1 to 20 carbon atoms, unsubstituted aryloxy groups having 6 to 30 carbon atoms, unsubstituted alkenyl groups having 2 to 20 carbon atoms, unsubstituted alkynyl groups having 2 to 20 carbon atoms, unsubstituted aryl groups having 6 to 30 carbon atoms, unsubstituted hete groups having 3 to 30 carbon atoms, This means that the alkyl group may be substituted with one or more selected from the group consisting of an unsubstituted aryl group, an unsubstituted alkylsilyl group having 3 to 20 carbon atoms, an unsubstituted arylsilyl group having 6 to 20 carbon atoms, an unsubstituted alkylgermanium group having 3 to 20 carbon atoms, an unsubstituted arylgermanium group having 6 to 20 carbon atoms, an unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, all of which have 0 to 20 carbon atoms.

[0056] When describing a molecular fragment as being attached to another moiety by a substituent or otherwise, it should be understood that the designation can be defined as to whether it is a fragment (e.g., a phenyl group, a phenylene group, a naphthyl group, a dibenzofuranyl group) or an entire molecule (e.g., benzene, naphthalene, dibenzofuran). As used herein, the designations of the substituents or different modes of attachment of the fragment are recognized as equivalents.

[0057] In the compounds mentioned herein, hydrogen atoms may be partially or completely replaced by deuterium.Other atoms, such as carbon and nitrogen, may also be replaced by their other stable isotopes.In order to improve the efficiency and stability of the device, the replacement of other stable isotopes in the compounds may be preferred.

[0058] In the compounds referred to herein, multiple substitution refers to the range up to the most available substitution, including double substitution.When a substituent in a compound referred to herein means multiple substitution (including double substitution, triple substitution, quadruple substitution, etc.), it means that the substituent can be present at multiple available substitution positions on the bond structure, and the substituents present at multiple available substitution positions can be the same structure or different structures.

[0059] Unless otherwise specifically limited, adjacent substituents in the compounds mentioned herein may be bonded to form a ring, adjacent substituents in the compounds may not be bonded to form a ring. In the compounds mentioned herein, adjacent substituents may be bonded to form a ring, including not only the situation where adjacent substituents may be bonded to form a ring, but also the situation where adjacent substituents do not bond to form a ring. When adjacent substituents may be bonded to form a ring, the ring formed may be a monocyclic or polycyclic ring, and an alicyclic ring, a heteroalicyclic ring, an aryl ring, or a heteroaryl ring. In such a description, adjacent substituents may refer to substituents bonded to the same atom, substituents bonded to carbon atoms directly bonded to each other, or substituents bonded to carbon atoms further apart. Preferably, adjacent substituents refer to substituents bonded to the same carbon atom and substituents bonded to carbon atoms directly bonded to each other.

[0060] The statement that adjacent substituents may be bonded to form a ring is also understood to mean that two substituents bonded to the same carbon atom are bonded to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0061] [ka]

[0062] The statement that adjacent substituents may be bonded to form a ring is also understood to mean that two substituents bonded to carbon atoms that are directly bonded to each other are bonded to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0063] [ka]

[0064] The statement that adjacent substituents may be bonded to form a ring is also understood to mean that two substituents bonded to carbon atoms further apart are bonded to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0065] [ka]

[0066] In addition, the statement that adjacent substituents may be bonded to form a ring is also recognized as meaning that when one of the two substituents bonded to carbon atoms directly bonded to each other represents hydrogen, the second substituent is bonded to the position to which the hydrogen atom is bonded to form a ring. The following formula is an example.

[0067] [ka]

[0068] According to one embodiment of the present invention, An anode; A cathode; an electroluminescent element including an emitting layer provided between the anode and the cathode, the emitting layer including a first compound, a second compound, and a third compound; The first compound has a structure represented by Formula 1, Formula 2, or Formula 3,

[0069] [ka] W may be the same or different for each occurrence, and may be C, CR w or N, and adjacent substituents R w may be bonded to form a ring, L is the same or different at each occurrence and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; R w are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, The second compound has a structure represented by formula 4:

[0070] [ka] In formula 4, L 1 ~L 3 are the same or different and are selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar 1 ~Ar 3 are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; The third compound comprises a metal having a relative atomic mass greater than 40 and a ligand L a wherein the ligand L a has a structure represented by formula 5,

[0071] [ka] In formula 5, ring A and ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms, or a heteroaromatic ring having 3 to 30 carbon atoms; R i each occurrence is the same or different and represents mono-, multi- or no substitution; R ii represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; Y is SiR y R y , G.E.R. y R y , N.R. y , P.R. y , O, S or Se; two R y When both exist simultaneously, two R y may be the same or different, X 1 ~X 2 CR may be the same or different for each occurrence. x or N, R, R i , R ii , R x and R yeach occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 2 to 2 ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R i , R x , R y , R and R ii may be linked to form a ring.

[0072] In this specification, adjacent substituents R w may be bonded to form a ring, any adjacent substituents R w Obviously, any adjacent substituents R w may not necessarily be bonded to form a ring.

[0073] In this specification, adjacent substituents R i , R x , R y , R and R ii may be bonded to form a ring means that adjacent substituent groups, for example, two substituents R i Two substituents R ii Two substituents R yTwo substituents R x R i and R x Between the substituents R and R y and the substituent R ii and R may be bonded together to form a ring. Obviously, these substituents do not have to be bonded together to form a ring.

[0074] According to one embodiment of the present invention, the first compound and the second compound are different.

[0075] According to an embodiment of the present invention, the second compound does not include a structure of phenanthroxazole, phenanthrazole, phenanthrene imidazole, azaphenanthroxazole, azaphenanthrazole or azaphenanthrene imidazole.

[0076] According to one embodiment of the present invention, the first compound has a structure represented by any one of formulas 1-a to 1-d, 2-a to 2-c, and 3-a.

[0077] [ka] (W may be the same or different for each occurrence. w or N, and adjacent substituents R w may be bonded to form a ring, Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; L is the same or different at each occurrence and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R ware the same or different and each occurrence represents hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted The group consisting of aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups, acyl groups, carbonyl groups, carboxyl groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof, each of which has 0 to 20 carbon atoms.

[0078] According to one embodiment of the present invention, the first compound has a structure represented by any one of formulas 1-a to 1-c, 2-a, and 3-a.

[0079] According to one embodiment of the present invention, the R w are the same or different and are selected from hydrogen, deuterium, halogen, cyano, hydroxyl, sulfanyl, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or combinations thereof.

[0080] According to one embodiment of the present invention, in the formula 1-a to formula 1-c, formula 2-a or formula 3-a, at least one R wand the R w are each identically or differently selected from deuterium, fluorine, cyano, hydroxyl, sulfanyl, methyl, trideuteromethyl, vinyl, phenyl, biphenyl, naphthalene, 4-cyanophenyl, dibenzofuran, dibenzothiophene, triphenylene, carbazole, 9-phenylcarbazole, 9,9-dimethylfluorene, pyridine, phenylpyridine, or combinations thereof.

[0081] According to one embodiment of the present invention, Ar has a structure represented by any one of formulas Ar-1 to Ar-4, which may be the same or different at each occurrence.

[0082] [ka] (Q may be C, CR, or the same or different for each occurrence. Q Or N is selected, Q 1 are O, S, Se, and NR Q or CR Q R Q Selected from two R Q When both exist simultaneously, two R Q may be the same or different, R Qare each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, Adjacent substituents R Q may be bonded to form a ring.

[0083] In this specification, adjacent substituents R Q may be bonded to form a ring, any adjacent substituents R Q Obviously, any adjacent substituents R Q may not necessarily be bonded to form a ring.

[0084] According to one embodiment of the present invention, in the formulae Ar-1 to Ar-4, Q is, identically or differently, C or CR Q Selected from Q 1 is O, S or CR Q R Q Selected from R Qare each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof; Adjacent substituents R Q may be bonded to form a ring.

[0085] According to one embodiment of the present invention, in the first compound, Ar, at each occurrence, is selected from the group consisting of a phenyl group, a biphenyl group, a phenanthrene group, a naphthalene group, a 4-cyanophenyl group, a dibenzofuran group, a dibenzothiophene group, a triphenylene group, a carbazole group, a 9,9-dimethylfluorene group, a phenanthroxazole group, a phenanthrazole group, or combinations thereof.

[0086] According to one embodiment of the present invention, the first compound is selected from the group consisting of Compounds 1-1-1 to 1-1-104, Compounds 1-2-1 to 1-2-101, and Compounds 1-3-1 to 1-3-62. Specific structures of Compounds 1-1-1 to 1-1-104, Compounds 1-2-1 to 1-2-101, and Compounds 1-3-1 to 1-3-62 are shown in claim 4.

[0087] According to one embodiment of the present invention, hydrogen atoms in Compounds 1-1-1 to 1-1-104, Compounds 1-2-1 to 1-2-101, and Compounds 1-3-1 to 1-3-62 may be partially or completely deuterated.

[0088] According to one embodiment of the present invention, the second compound has a structure represented by formula 4-1 or 4-2.

[0089] [ka] (In formula 4-1, V1 ~V 5 Each occurrence may be the same or different, and may consist of N or CR. v Selected from V 6 ~V 10 Each occurrence may be identical or different and may consist of C, N or CR. v Selected from and V 6 ~V 10 One of them is C, and the other is L. 3 Binds to In formula 4-2, V is selected from O, S, or Se; V 11 ~V 14 Each occurrence may be the same or different, and may consist of N or CR. v Selected from V 15 ~V 18 Each occurrence may be identical or different and may consist of C, N or CR. v Selected from and V 15 ~V 18 One of them is C, and the other is L. 3 Binds to L 1 ~L 3 are the same or different and are selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar 1 and Ar 2 are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; R veach occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituent. a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, Adjacent substituents R v may be bonded to form a ring.

[0090] In this specification, adjacent substituents R v may be bonded to form a ring, any adjacent substituents R v Obviously, any adjacent substituents R v may not necessarily be bonded to form a ring.

[0091] According to one embodiment of the present invention, in formula 4-2, V is selected from O or S.

[0092] According to one embodiment of the present invention, V is O in formula 4-2.

[0093] According to one embodiment of the present invention, in formula 4-1, V 1 ~V 5CR may be the same or different for each occurrence. v Selected from V 6 ~V 10 Each occurrence may be the same or different C or CR. v Selected from.

[0094] According to one embodiment of the present invention, in formula 4-2, V 11 ~V 14 CR may be the same or different for each occurrence. v Selected from V 15 ~V 18 Each occurrence may be identical or different and may consist of C or CR. v Selected from.

[0095] According to one embodiment of the present invention, in formula 4-1, V 1 ~V 10 At least one of is selected from N.

[0096] According to one embodiment of the present invention, in formula 4-2, V 11 ~V 18 At least one of is selected from N.

[0097] According to one embodiment of the present invention, in formula 4-1, V 1 ~V 10 At least one of the v and R v each occurrence may be the same or different and is selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms.

[0098] According to one embodiment of the present invention, in formula 4-2, V 11 ~V 18 At least one of the v and R v each occurrence may be the same or different and is selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms.

[0099] According to one embodiment of the present invention, R vare the same or different at each occurrence and are selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof.

[0100] According to one embodiment of the present invention, R v are each identically or differently selected from the group consisting of hydrogen, deuterium, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, and combinations thereof.

[0101] According to one embodiment of the present invention, Ar 1 and Ar 2 each occurrence is the same or different and is selected from a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms, or a combination thereof.

[0102] According to one embodiment of the present invention, Ar 1 and Ar 2 are the same or different at each occurrence and are selected from a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted phenanthrene group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted chrysene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, a substituted or unsubstituted pyridine group, a substituted or unsubstituted pyrimidine group, a substituted or unsubstituted quinoline group, or combinations thereof.

[0103] According to one embodiment of the present invention, L 1 ~L 3each occurrence is the same or different and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof.

[0104] According to one embodiment of the present invention, L 1 ~L 3 each occurrence may be the same or different and is selected from a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group, or combinations thereof.

[0105] According to one embodiment of the present invention, the second compound is selected from the group consisting of Compound B-1 to Compound B-208. Specific structures of Compound B-1 to Compound B-208 are shown in claim 12.

[0106] According to one embodiment of the present invention, the second compound is selected from the group consisting of compounds B-1 to B-228. The specific structures of compounds B-1 to B-208 are shown in claim 12, and compounds B-209 to B-228 are as follows:

[0107] [ka]

[0108] [ka]

[0109] [ka]

[0110] According to one embodiment of the present invention, the hydrogen atoms in the compounds B-1 to B-170 may be partially or completely deuterated.

[0111] According to one embodiment of the present invention, the hydrogen atoms in the compounds B-1 to B-228 may be partially or completely deuterated.

[0112] According to one embodiment of the present invention, in the formula 5, ring A and / or ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 18 carbon atoms, or a heteroaromatic ring having 3 to 18 carbon atoms.

[0113] According to one embodiment of the present invention, ring A and / or ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6-10 carbon atoms, or a heteroaromatic ring having 3-10 carbon atoms.

[0114] According to one embodiment of the present invention, in the third compound, the L a has a structure represented by any one of formulas 5-1 to 5-19.

[0115] [ka] (In formulas 5-1 to 5-19, X 1 ~X 2 CR may be the same or different for each occurrence. x Or N is selected, X 3 ~X 7 CR may be the same or different for each occurrence. i Or N, A 1 ~A 6 CR may be the same or different for each occurrence. ii or N, Z may be the same or different for each occurrence. iii R iii , SiR iii R iii , P.R. iii , O, S or NR iii Selected from two R iii When both exist simultaneously, two R iii are the same or different, Y is SiR y R y , N.R. y, P.R. y , O, S or Se; two R y When both exist simultaneously, two R y are the same or different, R, R x , R y , R i , R ii and R iii each occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 2 to 2 ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R and R x , R y , R i , R ii and R iii may be bonded to form a ring.

[0116] In this specification, adjacent substituents R, R x , R y , R i , R ii and R iii may be bonded to form a ring means that adjacent substituent groups, for example, two substituents R i Two substituents R ii Two substituents R xTwo substituents R y Two substituents R iii R i and R x R ii and R iii Between the substituents R and R y R y and R iii R x and R iii and the substituents R and R iii This means that any one or more of the substituents may be bonded to each other to form a ring. Obviously, none of these substituents may be bonded to each other to form a ring.

[0117] According to one embodiment of the present invention, L a is a structure represented by any one selected from formula 5-1, formula 5-5, formula 5-8, formula 5-10, formula 5-11, and formula 5-12.

[0118] According to one embodiment of the present invention, L a is a structure represented by formula 5-1.

[0119] According to one embodiment of the present invention, in Formula 5-1 to Formula 5-19, X 1 ~X n and / or A 1 ~A m At least one of the X is selected from N. n X 1 ~X 7 The formula 5-1 to the formula 5-19 correspond to the formula with the largest number in the formula 5-1 to the formula 5-19, m A 1 ~A 6 For example, in the formula 5-1, the number X corresponds to the largest number in any one of the formulas 5-1 to 5-19. n X 1 ~X 7 The largest number in the formula 5-1 is X 5 Corresponding to the above A m A 1 ~A 6The largest number in formula 5-1 is A 4 That is, in formula 5-1, X 1 ~X 5 and / or A 1 ~A 4 At least one of the X is selected from N. n X 1 ~X 7 The largest number in the formula 5-12 is X 3 Corresponding to the above A m A 1 ~A 6 The largest number in equation 5-12 is A 4 That is, in formula 5-12, X 1 ~X 3 and / or A 1 ~A 4 At least one of is selected from N.

[0120] According to one embodiment of the present invention, in Formula 5-1 to Formula 5-19, X 1 ~X n At least one of the X is selected from N. n X 1 ~X 7 This corresponds to the largest number present in any one of formulas 5-1 to 5-19.

[0121] According to one embodiment of the present invention, X 2 is N.

[0122] According to one embodiment of the present invention, in Formula 5-1 to Formula 5-19, X 1 ~X 2 are each independently CR x Selected from X 3 ~X 7 are each independently CR i Selected from A 1 ~A 6 are each independently CR ii Selected from Adjacent substituents R x , R i , Rii may be bonded to form a ring.

[0123] According to one embodiment of the present invention, the R x , R i , R ii are, each occurrence the same or different, selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a cyano group, and combinations thereof; Adjacent substituents R x , R i , R ii may be bonded to form a ring.

[0124] According to one embodiment of the present invention, the R x , R i , R ii at least two or three of are, each occurrence, identically or differently selected from the group consisting of deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a cyano group, and combinations thereof; Adjacent substituents R x , R i , R ii may be bonded to form a ring.

[0125] In this embodiment, the R x , R i , R ii At least two or three of R xSubstituents, all R i Substituents and all R ii It means that at least two or three substituents selected from the group consisting of substituents are the same or different at each occurrence and are selected from said substituent group.

[0126] According to one embodiment of the present invention, in the third compound, the ligand L a has a structure represented by formula 5-20 or formula 5-21.

[0127] [ka] (In formula 5-20 and formula 5-21, Y is selected from O or S; R x1 , R x2 , R i1 , R i2 , R i3 , R ii1 , R ii2 , R ii3 , R ii4 are, each occurrence being the same or different, selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, and combinations thereof; R, each occurrence being the same or different, is selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, and combinations thereof.

[0128] According to one embodiment of the present invention, in Formula 5-20 and Formula 5-21, R x1 , R x2 , R i1 , R i2 , R i3 At least one or two of and / or R ii1 , R ii2 , R ii3 , R ii4 at least one or two of, each occurrence, are the same or different and are selected from deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; and R is selected from halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof.

[0129] According to one embodiment of the present invention, in Formula 5-20 and Formula 5-21, R x1 , R x2 , R i1 , R i2 , R i3 At least one or two of and / or R ii1 , R ii2 , R ii3 , R ii4at least one or two of, each occurrence, are the same or different and are selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; and R is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof.

[0130] According to one embodiment of the present invention, in Formula 5-20 and Formula 5-21, R i2 is selected from deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R is selected from a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R ii1 , R ii2 , R ii3 , R ii4at least one or two of each occurrence are the same or different and selected from deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof.

[0131] According to one embodiment of the present invention, in Formula 5-20 and Formula 5-21, R i2 is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R ii1 , R ii2 , R ii3 , R ii4 at least one or two of, each occurrence, are the same or different and are selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof.

[0132] According to one embodiment of the present invention, in Formula 5-20 and Formula 5-21, R x1 , R x2 , R i1 , R i2 , R i3 , R ii1 , R ii2 , R ii3 , R ii4 At least one of R, each occurrence, is the same or different, and is selected from the group consisting of a substituted or unsubstituted alkyl group having 3 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, and combinations thereof.

[0133] According to one embodiment of the present invention, R x1 , R x2 , R i1 , R i2 , R i3 , R ii1 , R ii2 , R ii3 , R ii4 At least one of R, each occurrence, is the same or different, and is selected from the group consisting of substituted or unsubstituted alkyl groups having 3 to 10 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 10 ring carbon atoms, and combinations thereof.

[0134] According to one embodiment of the present invention, L a may be the same or different for each occurrence of L a1 ~L a150 The L is selected from the group consisting of a1 ~L a150 The specific structure is shown in claim 17.

[0135] According to one embodiment of the present invention, L a may be the same or different for each occurrence of L a1 ~L a162 The L is selected from the group consisting of a1 ~L a150 A specific structure of L is shown in claim 17. a151 ~L a162 is as follows:

[0136] [ka]

[0137] According to one embodiment of the invention, the third compound is M(L a ) m (L b ) n (L c ) q where the metal M is selected from metals with a relative atomic mass greater than 40, and L a , L b , L c are respectively the first ligand, the second ligand and the third ligand of said third compound; m is 1, 2 or 3, n is 0, 1 or 2, q is 0, 1 or 2, and m+n+q is equal to the oxidation state of the metal M. If m is greater than 1, then multiple L a are the same or different, and if n is 2, the two L b are the same or different, and if q is 2, the two L c are the same or different, L a , L b and L c may be linked to form a multidentate ligand, L b and L c is selected from the group consisting of the following structures, which may be the same or different at each occurrence:

[0138] [ka] R a , R b and R c represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; X b Each occurrence may be the same or different and may be O, S, Se, or NR N1 and C.R. C1 R C2 Selected from the group consisting of: X c and Xd are O, S, Se and NR N2 is selected from the group consisting of: R a , R b , R c , R N1 , R N2 , R C1 and R C2 each occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 2 to 2 ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R a , R b , R c , R N1 , R N2 , R C1 and R C2 may be bonded to form a ring.

[0139] In this embodiment, adjacent substituents R a , R b , R c , R N1 , R N2 , R C1 and R C2 may be bonded to form a ring means that adjacent substituent groups, for example, two substituents Ra Two substituents R b Two substituents R c R a and R b R a and R c R b and R c R a and R N1 R b and R N1 R a and R C1 R a and R C2 R b and R C1 R b and R C2 R a and R N2 R b and R N2 R C1 and R C2 This means that any one or more of the substituents may be bonded to each other to form a ring. Obviously, none of these substituents may be bonded to each other to form a ring.

[0140] According to one embodiment of the invention, the metal M is selected from Ir, Rh, Re, Os, Pt, Au or Cu.

[0141] According to one embodiment of the present invention, M is selected from Ir or Pt.

[0142] According to one embodiment of the present invention, M is Ir.

[0143] According to one embodiment of the present invention, L b is the same or different at each occurrence and is selected from the following structures:

[0144] [ka] (R 1 ~R 7each occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted is selected from the group consisting of an unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, each of which has 0 to 20 carbon atoms.

[0145] According to one embodiment of the present invention, R 1 ~R 3 at least one or two of, each occurrence, are identically or differently selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof; and / or R 4 ~R 6 At least one or two of each occurrence are the same or different and are selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof.

[0146] According to one embodiment of the present invention, R 1 ~R 3at least two of, each occurrence, are identically or differently selected from a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 2 to 20 carbon atoms, or a combination thereof; and / or R 4 ~R 6 At least two of each occurrence are the same or different and are selected from a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 2 to 20 carbon atoms, or a combination thereof.

[0147] According to one embodiment of the present invention, in the third compound, the L b may be the same or different for each occurrence of L b1 ~L b322 The L is selected from the group consisting of b1 ~L b322 A specific structure of the above is shown in claim 21.

[0148] According to one embodiment of the present invention, in the third compound, the L c may be the same or different for each occurrence of L c1 ~L c231 The L is selected from the group consisting of c1 ~L c231 A specific structure of the above is shown in claim 21.

[0149] According to one embodiment of the present invention, in the device, the third compound is an Ir complex and is Ir(L a )(L b )(L c ), Ir(L a ) 2 (L b ), Ir(L a ) 2 (L c ) and Ir(L a )(L c ) 2 and the third compound has a structure represented by any one of the following: a )(L b )(Lc ) structure, the L a , L a1 ~L a150 and wherein the L b , L b1 ~L b322 and wherein the L c , L c1 ~L c231 and the third compound is Ir(L a ) 2 (L b ) in which the L a , L a1 ~L a150 Any one or any two selected from the group consisting of b , L b1 ~L b322 and the third compound is Ir(L a ) 2 (L c ) in which the L a , L a1 ~L a150 Any one or any two selected from the group consisting of c , L c1 ~L c231 and the third compound is Ir(L a )(L c ) 2 When the L a , L a1 ~L a150 and wherein the L c , L c1 ~L c231 Any one or any two selected from the group consisting of:

[0150] According to one embodiment of the present invention, in the device, the third compound is an Ir complex and is Ir(L a )(L b )(L c ), Ir(La ) 2 (L b ), Ir(L a ) 2 (L c ) and Ir(L a )(L c ) 2 and the third compound has a structure represented by any one of the following: a )(L b )(L c ) in which the L a , L a1 ~L a162 and wherein the L b , L b1 ~L b322 and wherein the L c , L c1 ~L c231 and the third compound is Ir(L a ) 2 (L b ) in which the L a , L a1 ~L a162 Any one or any two selected from the group consisting of b , L b1 ~L b322 and the third compound is Ir(L a ) 2 (L c ) in which the L a , L a1 ~L a162 Any one or any two selected from the group consisting of c , L c1 ~L c231 and the third compound is Ir(L a )(L c ) 2 When the L a , L a1 ~L a162 and wherein the L c, L c1 ~L c231 Any one or any two selected from the group consisting of:

[0151] According to one embodiment of the present invention, the third compound is compound C 1 ~Compound C 139 The compound C is selected from the group consisting of 1 ~Compound C 139 A specific structure of the above is shown in claim 22.

[0152] According to one embodiment of the present invention, the third compound is compound C 1 ~Compound C 148 The compound C is selected from the group consisting of 1 ~Compound C 139 A specific structure of compound C is shown in claim 22. 140 ~Compound C 148 is as follows:

[0153] [ka]

[0154] According to one embodiment of the present invention, in the light-emitting layer of the device, the first compound and the second compound are host materials, and the third compound is an emitting material.

[0155] According to another embodiment of the present invention, there is further disclosed an electronic device including an electroluminescent element, the specific structure of which is shown in any one of the above-mentioned embodiments.

[0156] According to another embodiment of the present invention, there is provided a composition comprising a first compound, a second compound and a third compound, The first compound has a structure represented by Formula 1, Formula 2, or Formula 3,

[0157] [ka] W may be the same or different for each occurrence, and may be C, CR w or N, and adjacent substituents R w may be bonded to form a ring, Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; L is the same or different at each occurrence and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R w are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted carbon a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, The second compound has a structure represented by formula 4:

[0158] [ka] In formula 4, L 1 ~L 3 are the same or different and are selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar 1 ~Ar 3 are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; The third compound comprises a metal having a relative atomic mass greater than 40 and a ligand L a wherein the ligand L a has a structure represented by formula 5,

[0159] [ka] In formula 5, ring A and ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms, or a heteroaromatic ring having 3 to 30 carbon atoms; R i each occurrence is the same or different and represents mono-, multi- or no substitution; R ii represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; Y is SiR y R y , G.E.R. y R y , N.R. y , P.R. y , O, S or Se; two R y When both exist simultaneously, two R y may be the same or different, X 1 ~X 2 CR may be the same or different for each occurrence. x or N, R, Ri , R ii , R x and R y each occurrence may be the same or different and represent hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted aryloxy group having 2 to 2 ... a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxyl group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R i , R x , R y , R and R ii are optionally linked to form a ring.

[0160] According to one embodiment of the present invention, the composition is a light-emitting layer composition.

[0161] Combination with other materials

[0162] The materials of the specific layers used in the organic light-emitting device described in the present invention can be used in combination with various other materials present in the device. These combinations of materials are described in detail in paragraphs 0132-0161 of US Patent Application US2016 / 0359122A1, the contents of which are incorporated herein by reference in their entirety. The materials described or referred to are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can easily refer to the literature to identify other materials that can be used in combination.

[0163] It is stated herein that the materials of specific layers used in the organic light-emitting device can be used in combination with a variety of other materials present in the device. Illustratively, the compounds disclosed herein can be used in combination with a variety of emitting dopants, hosts, transport layers, blocking layers, injection layers, electrodes and other possible layers. These combinations of materials are described in detail in paragraphs 0080-0101 of patent application US2015 / 0349273A1, the contents of which are incorporated herein by reference in their entirety. The materials described or mentioned are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can easily refer to the literature to identify other materials that can be used in combination.

[0164] The first compound, the second compound and the third compound used in the present invention can be obtained by the preparation method in the prior art, or can be easily prepared by referring to patent applications such as application numbers US5843607A, US2016293853A1, CN101511834A, CN106459018A, CN110540536A, WO2018016742A1, WO2019231210A1, CN202110348602.6, so they will not be described here repeatedly. The method for manufacturing the electroluminescent element is not limited. The manufacturing methods in the following examples are merely illustrative and should not be understood as limiting. Those skilled in the art can reasonably improve the manufacturing methods in the following examples based on the prior art. Illustratively, the ratio of various materials in the light-emitting layer is not particularly limited, and those skilled in the art can reasonably select within a certain range based on the prior art. For example, based on the total weight of the light-emitting layer materials, the host material may account for 80% to 99% and the light-emitting material may account for 1% to 20%, or the host material may account for 90% to 98% and the light-emitting material may account for 2% to 10%. The host material may also be two or more materials. The ratio of the two host materials to the host material may be 99:1 to 1:99, 80:20 to 20:80, or 60:40 to 40:60. In the embodiment of the device, the characteristics of the device were also tested using equipment commonly used in this field (including but not limited to an evaporation machine manufactured by Angstrom Engineering, an optical test system and a service life test system manufactured by Suzhou Fusida, an ellipsometer manufactured by Beijing Liangtian, etc.) in a manner familiar to those skilled in the art. Those skilled in the art are familiar with the use of the above-mentioned equipment, the test method, and other related contents, and can reliably and unaffectedly obtain the specific data of the sample, so the above-mentioned related contents will not be repeated in this specification. EXAMPLES

[0165] Example of the element

[0166] The present invention will be described in more detail below with reference to the following examples. Obviously, the following examples are only used for illustrative purposes and are not intended to limit the scope of the present invention. Based on the following examples, those skilled in the art can obtain other embodiments of the present invention by modification.

[0167] Example 1:

[0168] First, a glass substrate with an indium tin oxide (ITO) anode with a thickness of 1200 Å was cleaned and then treated with UV ozone and oxygen plasma. After treatment, the substrate was dried in a glove box filled with nitrogen gas to remove water. The substrate was then mounted on a substrate holder and placed in a vacuum chamber. Below, the vacuum level was set to 10 for the specified organic layer. -6 In the case of Torr, deposition was carried out on the ITO anode by hot vacuum deposition at a rate of 0.2-10 Å / s in order. Compounds HT and HI were co-deposited to serve as a hole injection layer (HIL) with a thickness of 100 Å, of which the doping weight ratio of HI is 3%. Compound HT was used as a hole transport layer (HTL) with a thickness of 400 Å. Compound EB was used as an electron blocking layer (EBL) with a thickness of 50 Å. Then, the first compound 1-2-2, the second compound B-91, and the third compound C-100 as dopant were co-deposited. 2 were co-deposited to form the light-emitting layer (EML) with a thickness of 400 Å. Among them, the first compound 1-2-2, the second compound B-91 and the third compound C 2 The weight ratio of ET to Liq is 48.5:48.5:3. Compound HB is used as a hole blocking layer (HBL) with a thickness of 50 Å. Compound ET and 8-hydroxyquinoline-lithium (Liq) are co-deposited on the hole blocking layer to be used as an electron transport layer (ETL) with a thickness of 350 Å, in which the weight ratio of ET to Liq is 40:60. Finally, 8-hydroxyquinoline-lithium (Liq) with a thickness of 10 Å is deposited as an electron injection layer (EIL), and aluminum with a thickness of 1200 Å is deposited as a cathode. Then, the device is transferred to a glove box and encapsulated with a glass cover to complete the device.

[0169] Example 2: The embodiment of the device of Example 2 is the same as that of Example 1. The only difference is that the compound 1-1-3 replaces the compound 1-2-2 in the light-emitting layer.

[0170] Example 3: The embodiment of the device in Example 3 is the same as that in Example 1. The difference is that Compound 1-2-2, Compound B-181 and Compound C 139 The compound 1-2-2, compound B-181 and compound C are co-deposited and used as the light-emitting layer. 139 (The weight ratio is 58.5:38.5:3.)

[0171] Example 4: The device embodiment of Example 4 is identical to that of Example 3. The only difference is that Compound B-176 replaces Compound B-181 in the light-emitting layer.

[0172] Example 5: The embodiment of the device in Example 5 is the same as that in Example 1. The difference is that Compound 1-1-63, Compound B-79 and Compound C 139 Compounds 1-1-63, B-79 and C-100 are co-deposited and used as the light-emitting layer. 139 The weight ratio of these is 68:29:3.

[0173] Example 6: The embodiment of the device in Example 6 is the same as that in Example 1. The difference is that Compound 1-3-1, Compound B-183 and Compound C 139 The compound 1-3-1, compound B-183 and compound C-184 are co-deposited and used as the light-emitting layer. 139 The weight ratio of these is 38.5:58.5:3.

[0174] Example 7: The embodiment of the device in Example 7 is the same as that in Example 1. The difference is that Compound 1-2-17, Compound B-210 and Compound C 139 Compounds 1-2-17, B-210 and C-211 are co-deposited and used as the light-emitting layer. 139 (The weight ratio is 48.5:48.5:3.)

[0175] Example 8: The embodiment of the device in Example 8 is the same as that in Example 1. The difference is that Compound 1-2-2, Compound B-211 and Compound C 140 Compounds 1-2-2, B-211 and C-212 are co-deposited and used as the light-emitting layer. 140 The weight ratio of these is 38.5:58.5:3.

[0176] Example 9: The embodiment of the device in Example 9 is the same as that in Example 1. The difference is that Compound 1-2-2, Compound B-209 and Compound C 140 Compounds 1-2-2, B-209 and C-209 are co-deposited and used as the light-emitting layer. 140 The weight ratio of these is 38.5:58.5:3.

[0177] Example 10: The embodiment of the device in Example 10 is the same as that in Example 1. The difference is that Compound 1-2-2, Compound B-99 and Compound C 146 Compounds 1-2-2, B-99 and C-100 are co-deposited and used as the light-emitting layer. 146 (The weight ratio is 48.5:48.5:3.)

[0178] Example 11: The embodiment of the device in Example 11 is the same as that in Example 1. The difference is that Compound 1-1-11, Compound B-209 and Compound C 147 Compounds 1-1-11, B-209 and C-209 are co-deposited and used as the light-emitting layer. 147 The weight ratio of these is 38.5:58.5:3.

[0179] Comparative Example 1: The embodiment of the device of Comparative Example 1 is the same as that of Example 1. The difference is that the compound RD1 is used in the light-emitting layer, and the compound C 2 It merely replaces the

[0180] Comparative Example 2: The embodiment of the element of Comparative Example 2 is the same as that of Example 1. The difference is that Compound 1-2-2 and Compound C 2 The compound 1-2-2 and compound C are simply co-deposited and used as the light-emitting layer. 2 The weight ratio of these is 97:3.

[0181] Comparative Example 3: The embodiment of the element of Comparative Example 3 is the same as that of Example 1. The only difference is that the compound 1-2-2 and the compound RD1 are co-deposited and used as the light-emitting layer (the weight ratio of the compound 1-2-2 and the compound RD1 is 97:3).

[0182] Comparative Example 4: The embodiment of the element of Comparative Example 4 is the same as that of Example 1. The difference is that Compound B-91 and Compound C-91 are used. 2 The compound B-91 and compound C-92 are simply co-deposited and used as the light-emitting layer. 2 The weight ratio of these is 97:3.

[0183] Comparative Example 5: The embodiment of the device of Comparative Example 5 is the same as that of Example 1. The only difference is that compound B-91 and compound RD1 are co-deposited and used as the light-emitting layer (the weight ratio of compound B-91 and compound RD1 is 97:3).

[0184] Comparative Example 6: The embodiment of the device of Comparative Example 6 is identical to that of Comparative Example 1. The only difference is that compound 1-1-3 replaces compound 1-2-2 in the light-emitting layer.

[0185] Comparative Example 7: The embodiment of the device of Comparative Example 7 is identical to that of Comparative Example 2. The only difference is that compound 1-1-3 replaces compound 1-2-2 in the light-emitting layer.

[0186] Comparative Example 8: The embodiment of the device of Comparative Example 8 is identical to that of Comparative Example 2. The only difference is that Compound A replaces Compound 1-2-2 in the light-emitting layer.

[0187] Comparative Example 9: The embodiment of the element of Comparative Example 9 is the same as that of Example 1. The difference is that Compound B-210 and Compound C-210 are used. 139 The compound B-210 and compound C-210 are co-deposited and used as the light-emitting layer. 139 The weight ratio is 97:3.

[0188] The detailed layer structure and thickness of the device are shown in Table 1. Layers using more than one material are obtained by doping different compounds in the weight ratios mentioned above.

[0189] [Table 1-1]

[0190] [Table 1-2]

[0191] The structure of the material used in the element is as follows:

[0192] [ka]

[0193] [ka]

[0194] [ka]

[0195] Table 2 shows the current density of 15 mA / cm in the examples and comparative examples. 2 The voltage and external quantum efficiency measured under the conditions of 15 mA / cm are shown. The device's service life LT95 is 15 mA / cm 2 Below is the time required for the corresponding luminance to decay to 95% of the initial value.

[0196] [Table 2-1] [Table 2-2]

[0197] As can be seen from the data in Table 2, compared to Comparative Example 1, Example 1 has a 9.5% increase in external quantum efficiency, a much larger 5.8-fold increase in service life, and a longer life of 1057 hours, and the device voltage also maintained an extremely low voltage level similar to that of Comparative Example 1. The only difference between Example 1 and Comparative Example 1 is the luminescent material. Compound C 2 The structure of compound RD1 is similar to that of compound C. 2 The performance of the element of Example 1 was significantly improved simply by increasing the number of fused ring structures in the ligand structure of Example 1. This proves that the combination of the first compound, the second compound, and the third compound selected in the present invention has unexpectedly excellent performance.

[0198] As can be seen from the data of Comparative Example 2 to Comparative Example 5 in Table 2, when the first compound or the second compound selected in the present invention is used alone as a host material, the performance of the device is poor, and the external quantum efficiency and the service life of Comparative Example 2 to Comparative Example 5 are only 10.9% and 74 hours at the highest. As a result, when the first compound or the second compound is used alone as a host, all of them have the same properties as Compound C. 2 Or it is proved that it cannot be well combined with compound RD1. However, Example 1, which uses both the first compound and the second compound selected in the present invention as hosts, has a very significant and unexpected improvement in the performance of the device, and maintains a very low voltage level roughly equivalent to that of Comparative Examples 2 and 3 in terms of voltage. Comparison of these data fully proves that the compound combination of the first compound, the second compound and the third compound selected in the present invention has unexpectedly excellent performance.

[0199] In comparison with Comparative Example 3 using a single host, Comparative Example 1 using a dual host improved the efficiency of the element by 90% and the service life by 5.5 times. In comparison with Comparative Example 2 using a single host, Example 1 using a dual host improved the efficiency of the element and the service life by 90.3% and 13.3 times, respectively. Similarly, by changing from a single host to a dual host, Example 1 achieved an improvement in the service life by 2.4 times that of Comparative Example 1. Similarly, by changing from a single host to a dual host, Comparative Example 1 using a dual host improved the efficiency of the element by 80.8% and the service life by 10.9 times. Compared to Comparative Example 4 using a single host, Example 1 using a dual host improved the efficiency and the service life by 79.8% and 16.3 times, respectively. Similarly, by changing from a single host to a dual host, Example 1 achieved an improvement in the service life by 1.5 times that of Comparative Example 1. These comparisons prove that the first compound, the second compound and the third compound of the present invention are more consistent, so that the resulting combination can more significantly improve the performance of the device, thus proving that the combination of the first compound, the second compound and the third compound selected in the present invention has excellent properties.

[0200] Compared to Comparative Example 6, Example 2 generally maintained a very low voltage level. More importantly, the external quantum efficiency of Example 2 was improved by 14%, and the service life was further improved by 6 times. The only difference between Example 2 and Comparative Example 6 was the luminescent material. Compound C 2 and compound RD1 has a similar structure, but compound C 2 The performance of the device of Example 2 was significantly improved simply by increasing the number of fused ring structures in the ligand structure, once again proving that the combination of the first compound, the second compound and the third compound selected in the present invention has unexpectedly excellent performance.

[0201] Compared with Comparative Example 7, which used only the first compound as a host, Example 2, which used a dual host, maintained a significantly lower voltage level. More importantly, the external quantum efficiency of Example 2 was significantly improved by 170%, and the service life was further improved by a significant factor of 32. This once again proves that the combination of the first compound, the second compound and the third compound selected in the present invention has unexpectedly excellent performance.

[0202] In Comparative Example 8, a commercial host material Compound A was used as a 2 When used in combination with the compound 1 and the compound 2 as the light-emitting layer, the device had excellent performance, and in particular the device's service life reached a high level of 477 hours. However, Example 1 and Example 2 had better performance because they used the first compound and the second compound as co-hosts. The voltage was reduced by 0.3 V in both cases, the efficiency was improved by 13% and 20%, respectively, and the service life was improved by 2.2 times and 1.4 times that of Comparative Example 8, respectively. As a result, the combination of the first compound, the second compound, and the third compound according to the present invention can significantly improve the device's performance. This once again proves the superiority of the combination of the first compound, the second compound, and the third compound according to the present invention.

[0203] Examples 3 to 6 show the situation where different combinations of the first compound, the second compound and the third compound are used in the light-emitting layer, and all of them can make the device obtain very good performance. Compared to Comparative Examples 1 and 6, Examples 3 to 6 have a slightly improved voltage, but the voltage is still at a low level. It should be noted that Examples 3 to 6 all achieve a high efficiency of over 21%, and achieve a very large improvement of 15.9% to 35.2% compared to Comparative Examples 1 and 6, and especially the external quantum efficiency of Examples 3 and 4 reaches a surprising level of over 23%. Example 6 even reaches an ultra-high EQE of over 24%. What is more difficult to obtain is that Examples 3 to 6 have an ultra-long service life of over 1000 hours while having an ultra-high external quantum efficiency, and achieve a very large improvement of 5 to 29 times compared to Comparative Examples 1 and 6, and especially Examples 3 and 4 all have an ultra-long service life of over 1900 hours, and the service life of Example 6 even exceeds 2800 hours. As a result, it is proved that the combination of the first compound, the second compound and the third compound selected in the present invention has particularly excellent device performance, which proves that the novel material combination consisting of the first compound, the second compound and the third compound according to the present invention has excellent performance and wide application prospects.

[0204] Compared with Comparative Example 9 using a single host, Example 7 using a dual host showed a lower voltage level, and its efficiency was significantly improved by 28.3%, and the service life was further improved by 9 times. Furthermore, the superiority of the combination of the first compound, the second compound, and the third compound according to the present invention is proven. In addition, Examples 8 to 11 show the situation where different combinations of the first compound, the second compound, and the third compound are used in more light-emitting layers, and all of them can obtain extremely excellent performance of the device. None of the voltage values ​​exceeded 4V, and all of the external quantum efficiencies reached a surprising level of more than 23%, while having an ultra-long service life of more than 2000 hours. What is even more difficult to obtain is that Examples 8 and 9 had an ultra-long service life of more than 3000 hours while achieving an ultra-high device efficiency of more than 25%. As a result, it is proven that the combination of the first compound, the second compound, and the third compound selected in the present invention has particularly excellent device performance. This proves that the novel material combination consisting of the first compound, the second compound and the third compound according to the present invention has excellent performance and is expected to be widely applicable.

[0205] In summary, the combination of the first and second compounds selected in the present invention in combination with the third compound can significantly improve the efficiency of the device, greatly increase the service life of the device, and obtain better device performance, thus having unexpected and unique advantages.

[0206] It should be understood that the various embodiments described herein are merely illustrative and are not intended to limit the scope of the present invention. Thus, it will be apparent to those skilled in the art that the invention sought to be protected includes variations of the specific and preferred embodiments described herein. Many of the materials and structures described herein can be substituted with other materials and structures without departing from the concept of the present invention. It should be understood that the various theories as to why the present invention works are not limiting. [Explanation of symbols]

[0207] 100 devices 101 Substrate 102 Encapsulation Layer 110 Anode 120 Hole injection layer 130 Hole transport layer 140 Electron Blocking Layer 150 Light-emitting layer 160 Hole Blocking Layer 170 Electron transport layer 180 Electron injection layer 190 Cathode 200 Organic light-emitting device

Claims

1. An anode; A cathode; An electroluminescent element comprising: an anode, a cathode, and a light-emitting layer provided between the anode and the cathode, the light-emitting layer includes a first compound, a second compound, and a third compound; The first compound has a structure represented by Formula 1, Formula 2, or Formula 3, 【Chemistry 1】 W may be the same or different for each occurrence, and may be C, CR, ｗ or N, and adjacent substituents R ｗ may be bonded to form a ring, L, which is the same or different at each occurrence, is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; R ｗ are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl ... is selected from the group consisting of unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups, carboxyl groups, cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof, each of which has 0 to 20 carbon atoms; The second compound has a structure represented by formula 4: 【Chemistry 2】 In formula 4, L １ ~L ３ are the same or different and are selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof, Ar １ ~Ar ３ are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; The third compound comprises a metal having a relative atomic mass greater than 40 and a ligand L ａ wherein the ligand L ａ has a structure represented by formula 5: 【Chemistry 3】 In formula 5, ring A and ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms, or a heteroaromatic ring having 3 to 30 carbon atoms; R ｉ each occurrence may be the same or different and represent mono-, multi- or no substitution; R ｉｉ represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; Y is SiR ｙ R ｙ , GeR ｙ R ｙ , N.R. ｙ , P.R. ｙ , O, S or Se; ｙ When both exist simultaneously, two R ｙ may be the same or different, X １ ~X ２ CR may be the same or different for each occurrence. ｘ or N, R, R ｉ , R ｉｉ , R ｘ and R ｙ each occurrence may be the same or different and represent hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted carbon atom a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, a carboxyl group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent Substituents R ｉ , R ｘ , R ｙ , R and R ｉｉ may be bonded to form a ring.

2. 2. The electroluminescence device according to claim 1, wherein the first compound has a structure represented by any one of formulas 1-a to 1-d, 2-a to 2-c, and 3-a. 【Chemistry 4】 【Chemistry 5】 (W may be the same or different for each occurrence.) ｗ or N, and adjacent substituents R ｗ may be bonded to form a ring, Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; L, which is the same or different at each occurrence, is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R ｗ are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl ... is selected from the group consisting of unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups, carboxyl groups, cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof, each of which has 0 to 20 carbon atoms; Preferably, the first compound has a structure represented by any one of formulas 1-a to 1-c, 2-a, and 3-a, More preferably, R ｗ are the same or different at each occurrence and are selected from hydrogen, deuterium, halogen, cyano, hydroxyl, sulfanyl, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof.

3. 2. The electroluminescence device of claim 1, wherein Ar has a structure represented by any one of formulas Ar-1 to Ar-4, each occurrence being the same or different. 【Chemistry 6】 (Q may be the same or different for each occurrence, and may be C, CR, Ｑ or N, Q １ is O, S, Se, NR Ｑ Or CR Ｑ R Ｑ Selected from R Ｑ are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl ... is selected from the group consisting of unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups, carboxyl groups, cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof, each of which has 0 to 20 carbon atoms; Adjacent Substituents R Ｑ may be bonded to form a ring, Preferably, each occurrence of Q is identical or different and is C or CR. Ｑ Selected from Q １ is O, S or CR Ｑ R Ｑ Selected from R Ｑ are the same or different at each occurrence and are selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof.

4. 2. The electroluminescence device according to claim 1, wherein the first compound is selected from the group consisting of the following compounds: 【Chemistry 7】 【Chemistry 8】 【Chemistry 9】 【Chemistry 10】 【Chemistry 11】 【Chemistry 12】 【Chemistry 13】 【Chemistry 14】 【Chemistry 15】 【Chemistry 16】 【Chemistry 17】 【Chemistry 18】 【Chemistry 19】 【Chemistry 20】 【Chemistry 21】 【Chemical 22】 【Chemistry 23】 【Chemistry 24】 【Chemistry 25】 【Chemistry 26】 【Chemistry 27】 【Chemistry 28】 (The hydrogen atoms in the compounds 1-1-1 to 1-1-104, 1-2-1 to 1-2-101, and 1-3-1 to 1-3-62 may be partially or completely deuterated.)

5. 2. The electroluminescence device according to claim 1, wherein the second compound has a structure represented by formula 4-1 or formula 4-2. 【Chemical 29】 (V １ ~V ５ Each occurrence may be the same or different and may be N or CR. ｖ Selected from V ６ ~V １０ is C, N or CR, either the same or different for each occurrence. ｖ and V ６ ~V １０ One of the groups is C, and L ３ Binds to V is selected from O, S or Se; V １１ ~V １４ Each occurrence may be the same or different and may be N or CR. ｖ Selected from V １５ ~V １８ is C, N or CR, either the same or different for each occurrence. ｖ and V １５ ~V １８ One of the groups is C, and L ３ Binds to L １ ~L ３ are the same or different and are selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof, Ar １ and Ar ２ are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; R ｖ each occurrence is the same or different and represents hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 3 a substituted or unsubstituted aryl group having from 0 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having from 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having from 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having from 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanium group having from 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanium group having from 6 to 20 carbon atoms, a substituted or unsubstituted amino group, carboxyl group, cyano group, isocyano group, hydroxyl group, sulfanyl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof, each of which has from 0 to 20 carbon atoms; Adjacent Substituents R ｖ may be bonded to form a ring.)

6. 6. The electroluminescence device according to claim 5, wherein in formula 4-2, V is selected from O or S, and preferably V is O.

7. V １ ~V ５ CR may be the same or different for each occurrence. ｖ Selected from V ６ ~V １０ Each occurrence may be the same or different and may be C or CR. ｖ or V １１ ~V １４ CR may be the same or different for each occurrence. ｖ Selected from V １５ ~V １８ Each occurrence may be the same or different and may be C or CR. ｖ The electroluminescence device according to claim 5 , wherein the organic electroluminescence element is selected from the group consisting of

8. V １ ~V １０ At least one of the following is CR ｖ or V １１ ~V １８ At least one of the following is CR ｖ and R ｖ The electroluminescence device according to claim 5, wherein each occurrence of is the same or different and is selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms.

9. R ｖ are each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof; Preferably, R ｖ 6. The electroluminescent device of claim 5, wherein each occurrence is the same or different and is selected from the group consisting of hydrogen, deuterium, a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted biphenyl group, and combinations thereof.

10. Ar １ and Ar ２ are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms, or a combination thereof; Preferably, Ar １ and Ar ２ are the same or different at each occurrence and are selected from a substituted or unsubstituted phenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted naphthalene group, a substituted or unsubstituted phenanthrene group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted chrysene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted carbazole group, a substituted or unsubstituted dibenzofuran group, a substituted or unsubstituted dibenzothiophene group, a substituted or unsubstituted pyridine group, a substituted or unsubstituted pyrimidine group, a substituted or unsubstituted quinoline group, or a combination thereof.

11. L １ ~L ３ each occurrence is the same or different and is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof; Preferably, L １ ~L ３ 2. The electroluminescent device of claim 1, wherein each occurrence is the same or different and is selected from a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or unsubstituted biphenylene group, or a combination thereof.

12. 2. The electroluminescence device according to claim 1, wherein the second compound is selected from the group consisting of the following compounds: 【Chemistry 30】 【Chemistry 31】 【Chemistry 32】 【Chemical 33】 【Chemical 34】 【Chemistry 35】 【Chemical 36】 【Chemical 37】 【Chemical 38】 【Chemical 39】 【Chemistry 40】 【Chemistry 41】 【Chemistry 42】 【Chemistry 43】 【Chemistry 44】 【Chemistry 45】 【Chemistry 46】 【Chemistry 47】 【Chemistry 48】 【Chemistry 49】 (The hydrogen atoms in the compounds B-1 to B-208 may be partially or completely deuterated.)

13. In the formula 5, ring A and / or ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 18 carbon atoms, or a heteroaromatic ring having 3 to 18 carbon atoms; The electroluminescent device according to claim 1, wherein ring A and / or ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 10 carbon atoms, or a heteroaromatic ring having 3 to 10 carbon atoms.

14. In the third compound, the ligand L ａ The electroluminescent device according to claim 1, wherein the compound has a structure represented by formula 5-20 or formula 5-21. 【Chemistry 50】 (In formula 5-20 and formula 5-21, Y is selected from O or S; R ｘ１ , R ｘ２ , R ｉ１ , R ｉ２ , R ｉ３ , R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ are, each occurrence the same or different, selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, and combinations thereof; R is, at each occurrence, the same or different, selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, and combinations thereof; Preferably, R ｘ１ , R ｘ２ , R ｉ１ , R ｉ２ , R ｉ３ and / or R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ at least one or two of are, each occurrence either identically or differently, selected from deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R is selected from a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; More preferably, R ｘ１ , R ｘ２ , R ｉ１ , R ｉ２ , R ｉ３ and / or R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ at least one or two of, each occurrence being the same or different, selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; and R is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof.

15. R ｉ２ is selected from the group consisting of deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R is selected from the group consisting of a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ at least one or two of are, each occurrence, identically or differently selected from deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; Preferably, R ｉ２ is selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R is selected from the group consisting of a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof; R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ The electroluminescence device according to claim 14, wherein at least one or two of are the same or different at each occurrence and are selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, or a combination thereof.

16. In formula 5-20 and formula 5-21, R ｘ１ , R ｘ２ , R ｉ１ , R ｉ２ , R ｉ３ , R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ at least one of R is, at each occurrence, the same or different, selected from the group consisting of substituted or unsubstituted alkyl groups having 3 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, and combinations thereof; Preferably, R ｘ１ , R ｘ２ , R ｉ１ , R ｉ２ , R ｉ３ , R ｉｉ１ , R ｉｉ２ , R ｉｉ３ , R ｉｉ４ 15. The electroluminescent device according to claim 14, wherein at least one of R is the same or different at each occurrence and is selected from the group consisting of a substituted or unsubstituted alkyl group having 3 to 10 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 10 ring carbon atoms, and combinations thereof.

17. L ａ 2. The electroluminescent device of claim 1, wherein each occurrence is the same or different and is selected from the group consisting of the following structures: 【Chemistry 51】 【Chemistry 52】 【Chemistry 53】 【Chemical 54】 【Chemistry 55】 【Chemistry 56】 (In the above structure, TMS represents a trimethylsilyl group.)

18. The third compound is M(L ａ ) ｍ (L ｂ ) ｎ (L ｃ ) ｑ wherein the metal M is selected from metals having a relative atomic mass greater than 40; L ａ , L ｂ , L ｃ are the first, second and third ligands of said complex, respectively; m is 1, 2 or 3, n is 0, 1 or 2, q is 0, 1 or 2, m+n+q is equal to the oxidation state of the metal M, and when m is greater than 1, multiple L ａ are the same or different, and when n is 2, two L ｂ are the same or different, and when q is 2, two L ｃ are the same or different, L ａ , L ｂ and L ｃ may be linked to form a multidentate ligand, L ｂ and L ｃ is selected from the group consisting of the following structures, which may be the same or different at each occurrence: 【Chemistry 57】 R ａ , R ｂ and R ｃ represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; X ｂ Each occurrence may be the same or different and may be O, S, Se, NR Ｎ１ and C.R. Ｃ１ R Ｃ２ Selected from the group consisting of: X ｃ and X ｄ Each occurrence may be the same or different and may be O, S, Se, or NR Ｎ２ Selected from the group consisting of: R ａ , R ｂ , R ｃ , R Ｎ１ , R Ｎ２ , R Ｃ１ and R Ｃ２ each occurrence may be the same or different and represent hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted carbon atom a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, a carboxyl group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent Substituents R ａ , R ｂ , R ｃ , R Ｎ１ , R Ｎ２ , R Ｃ１ and R Ｃ２ The electroluminescence device according to claim 1 , wherein:

19. 19. The electroluminescent device of claim 18, wherein the metal M is selected from Ir, Rh, Re, Os, Pt, Au or Cu, preferably M is selected from Ir or Pt, more preferably M is Ir.

20. L ｂ 20. The electroluminescent device of claim 18, wherein each occurrence is the same or different and is selected from the following structures: 【Chemistry 58】 (R １ ~R ７ are, each occurrence being the same or different, selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, a carboxyl group, a cyano group, an isocyano group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Preferably, R １ ~R ３ at least one or two of, each occurrence, are identically or differently selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof; and / or R ４ ~R ６ at least one or two of are, identically or differently, selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof, More preferably, R １ ~R ３ at least two of, for each occurrence, are identically or differently selected from a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 2 to 20 carbon atoms, or a combination thereof; and / or R ４ ~R ６ At least two of, each occurrence, are the same or different and are selected from a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 2 to 20 carbon atoms, or a combination thereof.

21. L ｂ may be the same or different for each occurrence, 【Chemistry 59】 【Chemistry 60】 【Chemistry 61】 【Chemistry 62】 【Chemistry 63】 【Chemistry 64】 【Chemistry 65】 【Chemistry 66】 【Chemistry 67】 Selected from the group consisting of: L ｃ may be the same or different for each occurrence, 【Chemistry 68】 【Chemistry 69】 【Chemistry 70】 【Chemistry 71】 【Chemical 72】 【Chemical 73】 【Chemical 74】 20. The electroluminescent device according to claim 18, selected from the group consisting of:

22. The third compound is an Ir complex and is Ir(L ａ ) (L ｂ ) (L ｃ ), Ir(L ａ ) ２ (L ｂ ), Ir(L ａ ) ２ (L ｃ ) and Ir(L ａ ) (L ｃ ) ２ and the third compound is Ir(L ａ ) (L ｂ ) (L ｃ ) structure, the L ａ L ａ１ ~L ａ１５０ and wherein the L ｂ L ｂ１ ~L ｂ３２２ and wherein the L ｃ L ｃ１ ~L ｃ２３１ and the third compound is Ir(L ａ ) ２ (L ｂ ) structure, the L ａ L ａ１ ~L ａ１５０ Any one or any two selected from the group consisting of ｂ L ｂ１ ~L ｂ３２２ and the third compound is Ir(L ａ ) ２ (L ｃ ) structure, the L ａ L ａ１ ~L ａ１５０ Any one or any two selected from the group consisting of ｃ L ｃ１ ~L ｃ２３１ and the third compound is Ir(L ａ ) (L ｃ ) ２ When the L ａ L ａ１ ~L ａ１５０ and wherein the L ｃ L ｃ１ ~L ｃ２３１ Any one or any two selected from the group consisting of: The electroluminescence device according to claim 18 , preferably selected from the group consisting of the third compound and the following structures. 【Chemistry 75】 【Chemical 76】 【Chemical 77】 【Chemical Formula 78】 【Chemical 79】 【Chemistry 80】 【Chemistry 81】 【Chemistry 82】 【Chemistry 83】 【Chemistry 84】 【Chemistry 85】 【Chemistry 86】 【Chemistry 87】

23. An electronic device comprising the electroluminescent element of claim 1.

24. A composition comprising a first compound, a second compound, and a third compound, The first compound has a structure represented by Formula 1, Formula 2, or Formula 3, 【Chemistry 88】 W may be the same or different for each occurrence, and may be C, CR, ｗ or N, and adjacent substituents R ｗ may be bonded to form a ring, Ar is, at each occurrence, the same or different, selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms; L, which is the same or different at each occurrence, is selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; R ｗ are each independently selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl ... is selected from the group consisting of unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups, carboxyl groups, cyano groups, isocyano groups, hydroxyl groups, sulfanyl groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof, each of which has 0 to 20 carbon atoms; The second compound has a structure represented by formula 4: 【Chemistry 89】 In formula 4, L １ ~L ３ are the same or different and are selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof, Ar １ ~Ar ３ are the same or different and are selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof; The third compound comprises a metal having a relative atomic mass of more than 40 and a ligand L ａ wherein the ligand L ａ has a structure represented by formula 5: 【Chemistry 90】 In formula 5, ring A and ring B are each independently selected from a 5-membered unsaturated carbocyclic ring, an aromatic ring having 6 to 30 carbon atoms, or a heteroaromatic ring having 3 to 30 carbon atoms; R ｉ each occurrence may be the same or different and represent mono-, multi- or no substitution; R ｉｉ represents, identically or differently, a single substitution, a multiple substitution, or no substitution at each occurrence; Y is SiR ｙ R ｙ , GeR ｙ R ｙ , N.R. ｙ , P.R. ｙ , O, S or Se; ｙ When both exist simultaneously, two R ｙ may be the same or different, X １ ~X ２ CR may be the same or different for each occurrence. ｘ or N, R, R ｉ , R ｉｉ , R ｘ and R ｙ each occurrence may be the same or different and represent hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, a substituted or unsubstituted aralkyl group having 7 to 30 carbon atoms, a substituted or unsubstituted alkoxy group having 1 to 20 carbon atoms, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted carbon atom a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, a carboxyl group, a cyano group, an isocyano group, a hydroxyl group, a sulfanyl group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent Substituents R ｉ , R ｘ , R ｙ , R and R ｉｉ may be linked to form a ring.

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