Organic electroluminescent device, organic layer, display assembly thereof and electronic equipment

Abstract

The invention discloses an organic electroluminescent device. The present invention relates to an organic electroluminescent device and, more particularly, to an organic electroluminescent device comprising a metal complex having a ligand structure of Formula 1 and a first compound having a structure of Formula 2, an organic layer comprising the metal complex and the first compound, and a display element and an electronic apparatus comprising the organic electroluminescent device and the organic layer. The organic electroluminescent device comprises an anode, a cathode and an organic layer arranged between the anode and the cathode, and the organic layer at least comprises a first metal complex and a first compound; wherein the first metal complex comprises a metal M and a ligand La coordinated with the metal M, La has a structure represented by formula 1, and the first compound has a structure represented by formula 2. The device has good comprehensive device performance, and especially the service life of the device can be prolonged.

Description

Technical Field

[0001] The present invention relates to an organic electroluminescent device, and more particularly to an organic electroluminescent device comprising a metal complex having a ligand structure of Formula 1 and a first compound having a structure of Formula 2, an organic layer, and a display component and an electronic device comprising the organic electroluminescent device and the organic layer. Background Art

[0002] Organic electronic devices include but are not limited to the following categories: organic light emitting diodes (OLEDs), organic field effect transistors (O-FETs), organic light emitting transistors (OLETs), organic photovoltaic devices (OPVs), dye-sensitized solar cells (DSSCs), organic optical detectors, organic photoreceptors, organic field effect devices (OFQDs), light emitting electrochemical cells (LECs), organic laser diodes and organic plasmonic light emitting devices.

[0003] In 1987, Tang and Van Slyke of Eastman Kodak reported a double-layer organic electroluminescent device, which included an arylamine hole transport layer and a tri-8-hydroxyquinoline-aluminum layer as an electron transport layer and a light-emitting layer (Applied Physics Letters, 1987, 51 (12): 913-915). Once a bias voltage 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 can include 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 the anode. Since OLEDs are self-luminous solid-state devices, they offer great potential for display and lighting applications. In addition, the inherent properties of organic materials, such as their flexibility, can make them very suitable for special applications, such as fabrication on flexible substrates.

[0004] OLEDs can be divided into three different types based on their light emission mechanism. The OLED invented by Tang and van Slyke is a fluorescent OLED. It uses only singlet light emission. The triplet generated in the device is wasted through non-radiative decay channels. Therefore, the internal quantum efficiency (IQE) of fluorescent OLEDs is only 25%. This limitation has hindered the commercialization of OLEDs. In 1997, Forrest and Thompson reported phosphorescent OLEDs, which used triplet light emission from heavy metals containing complexes as emitters. Therefore, singlet and triplet states can be harvested, achieving 100% IQE. Due to its high efficiency, the discovery and development of phosphorescent OLEDs directly contributed to the commercialization of active matrix OLEDs (AMOLEDs). Recently, Adachi achieved high efficiency through thermally activated delayed fluorescence (TADF) of organic compounds. These emitters have a small singlet-triplet gap, making it possible for excitons to return from triplet to singlet. In TADF devices, triplet excitons can generate singlet excitons through reverse intersystem crossing, resulting in high IQE.

[0005] OLEDs can also be classified into small molecule and polymer OLEDs based on the form of the material used. Small molecules are any organic or organometallic material that is not a polymer. Small molecules can have a large molecular weight as long as they have a precise structure. Dendrimers with well-defined structures are considered small molecules. Polymer OLEDs include conjugated polymers and non-conjugated polymers with pendant luminescent groups. Small molecule OLEDs can become polymer OLEDs if post-polymerization occurs during the manufacturing process.

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

[0007] The emission color of OLED can be achieved by the structural design of the luminescent material. OLED can include one luminescent layer or multiple luminescent layers to achieve the desired spectrum. Green, yellow and red OLEDs, phosphorescent materials have been successfully commercialized. Blue phosphorescent devices still have problems such as blue unsaturation, short device life and high operating voltage. Commercial full-color OLED displays usually adopt a hybrid strategy, using blue fluorescence and phosphorescent yellow, or red and green. At present, the efficiency of phosphorescent OLEDs decreases rapidly under high brightness conditions, which is still a problem. In addition, it is expected to have a more saturated emission spectrum, higher efficiency and longer device life.

[0008] The applicant's prior application US20240016057A1 discloses an organic compound having the following structure and an organic light-emitting device comprising the compound: X is selected from C, CR in the same or different way for each occurrence x or N; Z is selected from CR in the same or different manner at each occurrence z or N; Ar each time appears, the same or different is selected from the following structures:

[0009] In the disclosed device embodiments, iridium metal complexes are used as light-emitting materials, but they do not disclose or teach the use of the first compound having the specific structure of Formula 2 of the present invention and its combination with the metal complex of the ligand having the specific structure of Formula 1 of the present invention.

[0010] Through in-depth research, the present inventors have found that an organic electroluminescent device using a first metal complex having a ligand structure of Formula 1 and a first compound having a structure of Formula 2 can significantly improve the overall performance of the organic electroluminescent device. Summary of the invention

[0011] The present invention aims to provide an organic electroluminescent device having a first metal complex having a ligand structure of Formula 1 and a first compound having a structure of Formula 2 to solve at least part of the above problems. The organic electroluminescent device has better comprehensive performance, especially in terms of device life, and has a significant effect improvement.

[0012] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0013] anode,

[0014] cathode,

[0015] and an organic layer disposed between the anode and the cathode, the organic layer comprising at least a first metal complex and a first compound;

[0016] The first metal complex comprises a metal M and a ligand L coordinated with the metal M. a , L a Having a structure represented by Formula 1:

[0017]

[0018] in,

[0019] The metal M is selected from metals with a relative atomic mass greater than 40;

[0020] Cy is selected, at each occurrence, identically or differently, from substituted or unsubstituted aryl having 5 to 24 ring atoms, or substituted or unsubstituted heteroaryl having 5 to 24 ring atoms, or a combination thereof;

[0021] The Cy is connected to the metal M via G1;

[0022] G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S;

[0023] X1-X4 are selected from C, CR in the same or different manner at each occurrence x or N; and at least one of X1-X4 is selected from C and is connected to Cy;

[0024] When X1, X2, X3 or X4 connected to G2 is selected from N, G2 is selected from a single bond, and the X1, X2, X3 or X4 is connected to the metal M through G2 to form a metal-nitrogen bond; when X1, X2, X3 or X4 connected to G2 is selected from C, G2 is selected from a single bond, O or S, and the X1, X2, X3 or X4 is connected to the metal M through G2;

[0025] X5-X8 are selected from CR in the same or different way each time they appear. x or N;

[0026] X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1 at each occurrence; when two R1s are present at the same time, the two R1s are the same or different;

[0027] R x and R1, at each occurrence, is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0028] Adjacent substituents R1, R xcan optionally be linked to form a ring;

[0029] Wherein, the first compound has a structure represented by Formula 2:

[0030]

[0031] In formula 2,

[0032] Y is selected from CR y R y , NR y , O, S or Se;

[0033] Each occurrence of E1-E5 is selected from C, CR e or N, and one of E1 and E2 is selected from C, and the structure shown in formula 2 connected; the other of E1 and E2 or one of E3-E5 is selected from C and connected to L;

[0034] Y1-Y4 are selected from C, CR y or N; and one of Y1 to Y4 is selected from C and is connected to L;

[0035] Each occurrence of Y5-Y8 is selected from CR y or N;

[0036] Each occurrence of Z is selected from CR z or N;

[0037] L is identically or differently selected at each occurrence 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;

[0038] L1 and L2 are identically or differently 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;

[0039] Ar1 and Ar2 are identically or differently selected at each occurrence from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or combinations thereof;

[0040] R e , R y and R zThe group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0041] Adjacent substituent R e can optionally be linked to form a ring;

[0042] Adjacent substituent R y can optionally be linked to form a ring;

[0043] Adjacent substituent R z Can optionally be linked to form a ring.

[0044] According to another embodiment of the present invention, a composition is also disclosed, which includes the first metal complex having a structure of Formula 1 and the first compound having a structure of Formula 2.

[0045] According to another embodiment of the present invention, an organic layer is disclosed, which comprises the composition described in the above embodiment.

[0046] According to another embodiment of the present invention, a display component is also disclosed, which includes the organic electroluminescent device or the organic layer.

[0047] According to another embodiment of the present invention, an electronic device is also disclosed, which includes the organic electroluminescent device, or includes the organic layer, or includes the display component.

[0048] The present invention discloses an organic electroluminescent device having a first metal complex having a ligand structure of Formula 1 and a first compound having a structure of Formula 2. The device has good comprehensive device performance, especially can improve the life of the device; and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Figure 1 is a schematic diagram of an organic light-emitting device that may contain the compounds and compound combinations disclosed herein.

[0050] Figure 2 is a schematic diagram of another organic light-emitting device that may contain the compounds and compound combinations disclosed herein. DETAILED DESCRIPTION

[0051] OLEDs can be manufactured on a variety of substrates, such as glass, plastic, and metal. Figure 1 An organic light-emitting device 100 is shown schematically and non-limitingly. The figure is not necessarily drawn to scale, and some layer structures in the figure may be omitted as needed. 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, a light-emitting layer 150, a hole blocking layer 160, an electron transport layer 170, an electron injection layer 180 and a cathode 190. The device 100 can be manufactured by depositing the described layers in sequence. The properties and functions of each layer and exemplary materials are described in more detail in columns 6-10 of U.S. Patent No. 7,279,704 B2, the entire contents of which are incorporated herein by reference.

[0052] There are more examples of each of these layers. For example, 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. An example of a p-doped hole transport layer is m-MTDATA doped with F4-TCNQ at a molar ratio of 50:1, as disclosed in U.S. Patent Application Publication No. 2003 / 0230980, which is incorporated by reference in its entirety. An example of a host material is disclosed in U.S. Patent No. 6,303,238 to Thompson et al., which is incorporated by reference in its entirety. An example of an n-doped electron transport layer is BPhen doped with Li at a molar ratio of 1:1, as disclosed in U.S. Patent Application Publication No. 2003 / 0230980, which is incorporated by reference in its entirety. U.S. Patent Nos. 5,703,436 and 5,707,745, which are incorporated by reference in their entirety, disclose examples of cathodes including composite cathodes having a thin layer of metal such as Mg:Ag with an overlying transparent, conductive, sputter-deposited ITO layer. The principles and use of barrier 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. A description of protective layers can be found in U.S. Patent Application Publication No. 2004 / 0174116, which is incorporated by reference in its entirety.

[0053] The above layered structure is provided by way of non-limiting example. The functions of an OLED can be achieved by combining the various layers described above, or some layers can be omitted entirely. It can 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 functional layer can include several sublayers. For example, a light-emitting layer can have two layers of different light-emitting materials to achieve a desired light-emitting spectrum.

[0054] 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.

[0055] OLED also requires encapsulation layers, such as Figure 2 The organic light emitting device 200 is schematically and non-limitingly shown. Figure 1The difference is that an encapsulation layer 102 may also be included on the cathode 190 to prevent harmful substances from the environment, such as moisture and oxygen. Any material that can provide an encapsulation function can be used as an encapsulation layer, such as glass or an organic-inorganic hybrid layer. The encapsulation layer should be placed directly or indirectly on the outside of the OLED device. Multilayer thin film encapsulation is described in U.S. Patent No. 7,968,146 B2, the entire contents of which are incorporated herein by reference.

[0056] Devices manufactured according to embodiments of the present invention can be incorporated into various consumer products having one or more electronic component modules (or units) of the device. Some examples of these consumer products include flat panel displays, monitors, medical monitors, televisions, billboards, lights for indoor or outdoor lighting and / or signaling, heads-up displays, fully or partially transparent displays, flexible displays, smart phones, tablet computers, tablet phones, wearable devices, smart watches, laptop computers, digital cameras, camcorders, viewfinders, micro displays, 3-D displays, vehicle displays, and taillights.

[0057] The materials and structures described herein may also be used in other organic electronic devices listed above.

[0058] As used herein, "top" means farthest from the substrate, while "bottom" means closest to the substrate. Where a first layer is described as being "disposed" "on" a second layer, the first layer is disposed farther from the substrate. Unless it is specified that the first layer is "in contact with" the second layer, other layers may be present between the first and second layers. For example, a cathode may be described as being "disposed" "on" an anode even though various organic layers are present between the cathode and the anode.

[0059] As used herein, "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.

[0060] A ligand may be referred to as "photoactive" when it is believed that the ligand directly contributes to the photoactive property of the emissive material. A ligand may be referred to as "ancillary" when it is believed that the ligand does not contribute to the photoactive property of the emissive material, but the ancillary ligand may alter the properties of the photoactive ligand.

[0061] It is believed that the internal quantum efficiency (IQE) of fluorescent OLEDs can exceed the 25% spin-statistical limit through delayed fluorescence. Delayed fluorescence can generally be divided into two types, namely P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence is generated by triplet-triplet annihilation (TTA).

[0062] On the other hand, E-type delayed fluorescence does not rely on the collision of two triplets, but on the conversion between triplet and singlet excited state. Compounds capable of producing E-type delayed fluorescence need to have a very small single-triplet gap for the conversion between energy states. Thermal energy can activate the transition from triplet back 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 reverse intersystem crossing (RISC) rate is fast enough to minimize the non-radiative decay by triplet, the fraction of backfilling singlet excited state may reach 75%. The total singlet fraction can be 100%, far exceeding the 25% of the spin statistics of the excitons generated by electricity.

[0063] The E-type delayed fluorescence feature can be seen in an exciplex system or a single compound. Without being bound by theory, it is believed that the E-type delayed fluorescence requires the luminescent material to have a small singlet-triplet energy gap (ΔE S-T ). Organic non-metal-containing donor-acceptor luminescent materials may be able to achieve this. The emission of these materials is usually characterized by donor-acceptor charge transfer (CT) type emission. The spatial separation of the HOMO and LUMO in these donor-acceptor type compounds usually produces a small ΔE S-T These states may include CT states. Generally, donor-acceptor light-emitting materials are constructed by linking an electron donor moiety (eg, an amino group or a carbazole derivative) to an electron acceptor moiety (eg, a six-membered aromatic ring containing N).

[0064] Definition of Substituent Terms

[0065] Halogen or halide - as used herein includes fluorine, chlorine, bromine and iodine.

[0066] Alkyl - as used herein, includes straight chain and branched alkyl groups. The alkyl group may be an alkyl group having 1 to 20 carbon atoms, preferably an alkyl group having 1 to 12 carbon atoms, and more preferably an alkyl group 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, 3-methylpentyl. Among the above, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl and n-hexyl are preferred. In addition, the alkyl group may be optionally substituted.

[0067] Cycloalkyl - as used herein, includes cyclic alkyl. Cycloalkyl can be a cycloalkyl having 3 to 20 ring carbon atoms, preferably a cycloalkyl having 4 to 10 carbon atoms. Examples of cycloalkyl include cyclobutyl, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl, 1-adamantyl, 2-adamantyl, 1-norbornyl, 2-norbornyl, etc. Among the above, cyclopentyl, cyclohexyl, 4-methylcyclohexyl, 4,4-dimethylcyclohexyl are preferred. In addition, cycloalkyl can be optionally substituted.

[0068] Heteroalkyl - As used herein, a heteroalkyl group comprises one or more carbons in an alkyl chain substituted 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 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, triisopropylsilylethyl. In addition, heteroalkyl may be optionally substituted.

[0069] Alkenyl - as used herein, encompasses straight chain, branched and cyclic olefin groups. Alkenyl can be an alkenyl containing 2 to 20 carbon atoms, preferably an alkenyl having 2 to 10 carbon atoms. Examples of alkenyl include vinyl, propenyl, 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 norbornenyl. Additionally, alkenyl groups may be optionally substituted.

[0070] Alkynyl - as used herein, encompasses straight chain alkynyl. Alkynyl may be an alkynyl containing 2 to 20 carbon atoms, preferably an alkynyl having 2 to 10 carbon atoms. Examples of alkynyl include ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3,3-dimethyl-1-butynyl, 3-ethyl-3-methyl-1-pentynyl, 3,3-diisopropyl-1-pentynyl, phenylethynyl, phenylpropynyl, etc. Among the above, ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, phenylethynyl, etc. are preferred. In addition, alkynyl may be optionally substituted.

[0071] Aryl or aromatic group - As used herein, both non-fused and fused systems are contemplated. 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, phenanthrene, fluorene, pyrene, Perylene and azulene, preferably phenyl, biphenyl, terphenyl, triphenylene, fluorene and naphthalene. Examples of non-condensed aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-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-xylyl, mesityl and m-quadrenyl. In addition, the aryl group may be optionally substituted.

[0072] Heterocyclic or heterocyclic - as used herein, non-aromatic cyclic groups are contemplated. Non-aromatic heterocyclic groups include saturated heterocyclic groups having 3-20 ring atoms and unsaturated non-aromatic heterocyclic groups having 3-20 ring atoms, wherein at least one ring atom is selected from the group consisting of nitrogen atoms, oxygen atoms, sulfur atoms, selenium atoms, silicon atoms, phosphorus atoms, germanium atoms and boron atoms, and preferred non-aromatic heterocyclic groups are those having 3 to 7 ring atoms, including at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxirane, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, dioxopentanyl, dioxanyl, aziridinyl, dihydropyrrolyl, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxepinyl, thiepinyl, azepine and tetrahydrothioxolyl. Additionally, the heterocyclyl group may be optionally substituted.

[0073] Heteroaryl - As used herein, non-fused and fused heteroaromatic groups may contain 1 to 5 heteroatoms, wherein at least one heteroatom is selected from the group consisting of nitrogen, oxygen, sulfur, selenium, silicon, phosphorus, germanium and boron atoms. Heteroaryl also refers to heteroaryl. The heteroaryl may be a heteroaryl having 3 to 30 carbon atoms, preferably a heteroaryl having 3 to 20 carbon atoms, and more preferably a heteroaryl having 3 to 12 carbon atoms. Suitable heteroaryl groups include dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indole, carbazole, pyridine, indole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indenozine, benzoxazole, benzisoxazole, benzothiazole, quinoline, isoquinoline, In some embodiments, the heteroaryl group is substituted with 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazole and its aza analogs. In some embodiments, the heteroaryl group is substituted with 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazole and its aza analogs. In some embodiments, the heteroaryl group is substituted with 1,2-azaborine, 1,3-azaborine, 1,4-azaborine, borazole and its aza analogs. In addition, the heteroaryl group may be optionally substituted.

[0074] Alkoxy-as used herein, represented by -O-alkyl, -O-cycloalkyl, -O-heteroalkyl or -O-heterocyclyl. Examples and preferred examples of alkyl, cycloalkyl, heteroalkyl and heterocyclyl are the same as described above. Alkoxy can be an alkoxy having 1 to 20 carbon atoms, preferably an alkoxy having 1 to 6 carbon atoms. Examples of alkoxy include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, tetrahydrofuranyloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy and ethoxymethyloxy. In addition, alkoxy can be optionally substituted.

[0075] Aryloxy - as used herein, represented by -O-aryl or -O-heteroaryl. Examples and preferred examples of aryl and heteroaryl are the same as above. Aryloxy can be an aryloxy having 6 to 30 carbon atoms, preferably an aryloxy having 6 to 20 carbon atoms. Examples of aryloxy include phenoxy and biphenyloxy. In addition, aryloxy can be optionally substituted.

[0076] Aralkyl - as used herein, encompasses aryl-substituted alkyl groups. Aralkyl groups may be aralkyl groups having 7 to 30 carbon atoms, preferably aralkyl groups having 7 to 20 carbon atoms, and more preferably aralkyl groups having 7 to 13 carbon atoms. Examples of aralkyl groups include benzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, 2-phenylisopropyl, phenyl tert-butyl, α-naphthylmethyl, 1-α-naphthyl-ethyl, 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, substituted alkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl, arylalkyl,

[0077] Alkylsilyl - As used herein, alkyl substituted silicon groups are contemplated. The alkylsilyl group may be an alkylsilyl group having 3-20 carbon atoms, preferably an alkylsilyl group having 3 to 10 carbon atoms. Examples of alkylsilyl groups include trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyltert-butylsilyl, methyldi-tert-butylsilyl. In addition, the alkylsilyl group may be optionally substituted.

[0078] Arylsilyl - as used herein, encompasses at least one aryl-substituted silicon group. The arylsilyl group may be an arylsilyl group having 6 to 30 carbon atoms, preferably an arylsilyl group having 8 to 20 carbon atoms. Examples of arylsilyl groups include triphenylsilyl, phenyldiphenylsilyl, diphenylbiphenylsilyl, phenyldiethylsilyl, diphenylethylsilyl, phenyldimethylsilyl, diphenylmethylsilyl, phenyldiisopropylsilyl, diphenylisopropylsilyl, diphenylbutylsilyl, diphenylisobutylsilyl, diphenyltert-butylsilyl. In addition, the arylsilyl group may be optionally substituted.

[0079] Alkylgermanyl - As used herein, alkyl substituted germanyl is contemplated. The alkylgermanyl may be an alkylgermanyl having 3-20 carbon atoms, preferably an alkylgermanyl having 3 to 10 carbon atoms. Examples of alkylgermanyl include trimethylgermanyl, triethylgermanyl, methyldiethylgermanyl, ethyldimethylgermanyl, tripropylgermanyl, tributylgermanyl, triisopropylgermanyl, methyldiisopropylgermanyl, dimethylisopropylgermanyl, tri-tert-butylgermanyl, triisobutylgermanyl, dimethyltert-butylgermanyl, methyldi-tert-butylgermanyl. In addition, the alkylgermanyl may be optionally substituted.

[0080] Arylgermanyl - as used herein, encompasses germanyl substituted with at least one aryl or heteroaryl group. The arylgermanyl may be an arylgermanyl having 6 to 30 carbon atoms, preferably an arylgermanyl having 8 to 20 carbon atoms. Examples of arylgermanyl include triphenylgermanyl, phenyldibiphenylgermanyl, diphenylbiphenylgermanyl, phenyldiethylgermanyl, diphenylethylgermanyl, phenyldimethylgermanyl, diphenylmethylgermanyl, phenyldiisopropylgermanyl, diphenylisopropylgermanyl, diphenylbutylgermanyl, diphenylisobutylgermanyl, diphenyltert-butylgermanyl. In addition, the arylgermanyl may be optionally substituted.

[0081] The term "aza" in azadibenzofuran, azadibenzothiophene, etc. means that one or more CH groups in the corresponding aromatic fragment are replaced by 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. Other nitrogen analogs of the above-mentioned aza derivatives can be easily thought of by those of ordinary skill in the art, and all such analogs are determined to be included in the terms described herein.

[0082] In the present disclosure, unless otherwise defined, when any one of the terms in the group consisting of substituted alkyl, substituted cycloalkyl, substituted heteroalkyl, substituted heterocyclyl, substituted aralkyl, substituted alkoxy, substituted aryloxy, substituted alkenyl, substituted alkynyl, substituted aryl, substituted heteroaryl, substituted alkylsilyl, substituted arylsilyl, substituted alkylgermanyl, substituted arylgermanyl, substituted amino, substituted acyl, substituted carbonyl, substituted carboxylic acid, Substituted ester groups, substituted sulfinyl groups, substituted sulfonyl groups, substituted phosphino groups refer to any one of alkyl groups, cycloalkyl groups, heteroalkyl groups, heterocyclic groups, aralkyl groups, alkoxy groups, aryloxy groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, alkylsilyl groups, arylsilyl groups, alkylgermanyl groups, arylgermanyl groups, amino groups, acyl groups, carbonyl groups, carboxyl groups, ester groups, sulfinyl groups, sulfonyl groups and phosphino groups, which may be substituted by one or more of deuterium, halogen groups, unsubstituted alkyl groups having 1 to 20 carbon atoms, unsubstituted alkyl groups having 1 to 20 carbon atoms, Cycloalkyl having 3-20 ring carbon atoms, unsubstituted heteroalkyl having 1-20 carbon atoms, unsubstituted heterocyclyl having 3-20 ring atoms, unsubstituted aralkyl having 7-30 carbon atoms, unsubstituted alkoxy having 1-20 carbon atoms, unsubstituted aryloxy having 6-30 carbon atoms, unsubstituted alkenyl having 2-20 carbon atoms, unsubstituted alkynyl having 2-20 carbon atoms, unsubstituted aryl having 6-30 carbon atoms , unsubstituted heteroaryl having 3 to 30 carbon atoms, unsubstituted alkylsilyl having 3 to 20 carbon atoms, unsubstituted arylsilyl having 6 to 20 carbon atoms, unsubstituted alkylgermanyl having 3 to 20 carbon atoms, unsubstituted arylgermanyl having 6 to 20 carbon atoms, unsubstituted amino having 0 to 20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino and combinations thereof.

[0083] It should be understood that when describing a molecular fragment as a substituent or otherwise attached to another moiety, its name can be written according to whether it is a fragment (e.g., phenyl, phenylene, naphthyl, dibenzofuranyl) or according to whether it is a whole molecule (e.g., benzene, naphthalene, dibenzofuran). As used herein, these different ways of specifying a substituent or attaching a fragment are considered equivalent.

[0084] In the compounds mentioned in this disclosure, 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. The replacement of other stable isotopes in the compounds may be preferred because it enhances the efficiency and stability of the device.

[0085] In the compounds mentioned in the present disclosure, polysubstitution refers to the range including disubstitution up to the maximum number of available substitutions. When a substituent in the compounds mentioned in the present disclosure represents polysubstitution (including disubstitution, trisubstitution, tetrasubstitution, etc.), it means that the substituent can exist in multiple available substitution positions on its connection structure, and the substituent existing in multiple available substitution positions can be the same structure or different structures.

[0086] In the compounds mentioned in the present disclosure, unless clearly defined, for example, adjacent substituents can be optionally connected to form a ring, otherwise adjacent substituents in the compound cannot be connected to form a ring. In the compounds mentioned in the present disclosure, adjacent substituents can be optionally connected to form a ring, including both the situation where adjacent substituents can be connected to form a ring and the situation where adjacent substituents are not connected to form a ring. When adjacent substituents can be optionally connected to form a ring, the formed ring can be a monocyclic or polycyclic ring (including spirocyclic, bridged ring, condensed ring, etc.), as well as an alicyclic, heteroalicyclic, aromatic or heteroaromatic ring. In this statement, adjacent substituents can 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 away. Preferably, adjacent substituents refer to substituents bonded to the same carbon atom and substituents bonded to carbon atoms directly bonded to each other.

[0087] The expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that two substituents bonded to the same carbon atom are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0088]

[0089] The expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that two substituents bonded to carbon atoms directly bonded to each other are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0090]

[0091] The expression that adjacent substituents can be optionally linked to form a ring is also intended to be taken to mean that two substituents bonded to a further distant carbon atom are linked to each other by a chemical bond to form a ring, which can be exemplified by the following formula:

[0092]

[0093] Furthermore, the statement that adjacent substituents can optionally be linked to form a ring is also intended to be taken to mean that, in the case where one of the two adjacent substituents represents hydrogen, the second substituent is bonded at the position to which the hydrogen atom is bonded, thereby forming a ring. This is exemplified by the following formula:

[0094]

[0095] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0096] anode,

[0097] cathode,

[0098] and an organic layer disposed between the anode and the cathode, the organic layer comprising at least a first metal complex and a first compound;

[0099] The first metal complex comprises a metal M and a ligand L coordinated with the metal M. a , L a Having a structure represented by Formula 1:

[0100]

[0101] in,

[0102] The metal M is selected from metals with a relative atomic mass greater than 40;

[0103] Cy is selected, at each occurrence, identically or differently, from substituted or unsubstituted aryl having 5 to 24 ring atoms, or substituted or unsubstituted heteroaryl having 5 to 24 ring atoms, or a combination thereof;

[0104] The Cy is connected to the metal M via G1;

[0105] G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S;

[0106] X1-X4 are selected from C, CRx or N at each occurrence, either identically or differently; and at least one of X1-X4 is selected from C and is connected to Cy;

[0107] When X1, X2, X3 or X4 connected to G2 is selected from N, G2 is selected from a single bond, and the X1, X2, X3 or X4 is connected to the metal M through G2 to form a metal-nitrogen bond; when X1, X2, X3 or X4 connected to G2 is selected from C, G2 is selected from a single bond, O or S, and the X1, X2, X3 or X4 is connected to the metal M through G2;

[0108] X5-X8 are selected from CR in the same or different way each time they appear. x or N;

[0109] X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1 at each occurrence; when two R1s are present at the same time, the two R1s are the same or different;

[0110] R xand R1, at each occurrence, is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0111] Adjacent substituents R1, R x can optionally be linked to form a ring;

[0112] Wherein, the first compound has a structure represented by Formula 2:

[0113]

[0114] In formula 2,

[0115] Y is selected from CR y R y , NR y , O, S or Se;

[0116] Each occurrence of E1-E5 is selected from C, CR e or N, and one of E1 and E2 is selected from C, and the structure shown in formula 2 connected; the other of E1 and E2 or one of E3-E5 is selected from C and connected to L;

[0117] Y1-Y4 are selected from C, CR y or N; and one of Y1 to Y4 is selected from C and is connected to L;

[0118] Each occurrence of Y5-Y8 is selected from CR y or N;

[0119] Each occurrence of Z is selected from CR z or N;

[0120] L is identically or differently selected at each occurrence 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;

[0121] L1 and L2 are identically or differently 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;

[0122] Ar1 and Ar2 are identically or differently selected at each occurrence from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or combinations thereof;

[0123] R e , R y and R z The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0124] Adjacent substituent R e can optionally be linked to form a ring;

[0125] Adjacent substituent R y can optionally be linked to form a ring;

[0126] Adjacent substituent Rz Can optionally be linked to form a ring.

[0127] In this context, “adjacent substituents R1 and R x "can be optionally connected to form a ring" is intended to mean that adjacent groups of substituents, for example, between two substituents R1, between two substituents R x Between the substituents R1 and R x Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0128] Herein, "adjacent substituents Re can be optionally connected to form a ring" is intended to mean that adjacent substituent groups, for example, any one or more of the substituent groups between two substituents Re can be connected to form a ring. Obviously, these substituents may not be connected to form a ring.

[0129] In this context, “the adjacent substituent R y "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R y Any one or more of the substituent groups can be connected to form a ring. Obviously, these substituents can also not be connected to form a ring.

[0130] Herein, "adjacent substituents Rz can be optionally connected to form a ring" is intended to mean that adjacent substituent groups, for example, any one or more of the substituent groups between two substituents Rz can be connected to form a ring. Obviously, these substituents may not be connected to form a ring.

[0131] According to one embodiment of the present invention, in the first metal complex, Cy appears each time and is selected from any structure in the group consisting of the following:

[0132]

[0133] in,

[0134] R, when present at each occurrence, is identical or different and represents mono-, poly- or unsubstituted;

[0135] R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0136] Adjacent substituents R can optionally be linked to form a ring;

[0137] Preferably, Cy is

[0138] Wherein, “#” indicates the position connected to the metal M through G1;

[0139] "*" indicates the position where Cy is connected to one of X1, X2, X3 or X4 in Formula 1. According to one embodiment of the present invention, the first metal complex, wherein X1-X8 each time appears, is selected from C or CR x .

[0140] According to one embodiment of the present invention, the organic electroluminescent device, wherein the ligand L a Having a structure represented by Formula 1a:

[0141]

[0142] in,

[0143] X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1 at each occurrence; when two R1s are present at the same time, the two R1s are the same or different;

[0144] Each occurrence of X3-X8 is the same or different selection from CR x or N;

[0145] R, when present at each occurrence, is identical or different and represents mono-substitution, poly-substitution, or no substitution;

[0146] R x , R and R1 are each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted cycloalkyl having 2 to 20 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 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a thiol group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0147] Adjacent substituent R x , R1, R can be optionally linked to form a ring.

[0148] In this context, “the adjacent substituent R x , R1, R can be optionally connected to form a ring", is intended to mean that adjacent substituent groups, for example, between two substituents R1, two substituents R x Between the substituents R1 and R x Between two substituents R, any one or more of these substituent groups can be connected to form a ring. Obviously, these substituents can also not be connected to form a ring.

[0149] According to one embodiment of the present invention, the metal complex, wherein the metal complex has M(L a ) m (L b ) n (L c ) q The general formula of

[0150] L a , L b and L care the first, second and third ligands coordinated to the metal M, and L c and the L a or L b are the same or different; where L a , L b and L c can optionally be linked to form a multidentate ligand;

[0151] m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, m+n+q is equal to the oxidation state of metal M; when m is greater than or equal to 2, multiple L a The same or different; when n is equal to 2, the two L b The same or different; when q is equal to 2, the two L c Same or different;

[0152] L b and L c Each occurrence is identically or differently selected from any one of the following groups:

[0153]

[0154] in,

[0155] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 , CR C1 R C2 ;

[0156] R a and R b Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0157] R a , R b , R c , R N1 , R C1 and R C2The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0158] Adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 Can optionally be linked to form a ring.

[0159] In this context, “the adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R a Between the two substituents R b Between, the substituent R a and R b Between, the substituent R a and R c Between, the substituent R b and R c Between, the substituent R a and R N1 Between, the substituent R b and R N1 Between, the substituent R a and R C1 Between, the substituent R a and R C2Between, the substituent R b and R C1 Between, the substituent R b and R C2 Between, and R C1 and R C2 Any one or more of these substituent groups may be linked to form a ring.

[0160] For example, The adjacent substituent R a , R b can be optionally linked to form a ring, when R a When optionally linked to form a ring, Can be formed structure.

[0161] Obviously, these substituents may not be connected to form a ring.

[0162] According to one embodiment of the present invention, the metal complex, wherein the metal M is selected from the group consisting of Cu, Ag, Au, Ru, Rh, Pd, Os, Ir and Pt each time it appears, the same or different;

[0163] According to one embodiment of the present invention, in the metal complex, the metal M is selected from Pt or Ir the same or differently each time it appears.

[0164] According to one embodiment of the present invention, the metal complex has Ir(L a ) m (L b ) 3-m The general structure of, and the structure represented by Formula 5: and the structure represented by Formula 5:

[0165]

[0166] in,

[0167] m is selected from 1, 2 or 3; when m is selected from 1, two L b The same or different; when m is selected from 2 or 3, multiple L a Same or different;

[0168] X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1; when two R1s are present at the same time, the two R1s are the same or different;

[0169] U1-U8 are selected from CR in the same or different way each time they appear. u or N;

[0170] X3-X8 are selected from CR in the same or different way each time they appear x or N;

[0171] Y9-Y 12 Each occurrence is selected from CR y1 or N;

[0172] R y1 , R x , R1 and R u The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0173] Adjacent substituent R x , R1, R y1 can optionally be linked to form a ring;

[0174] Adjacent substituent R u Can optionally be linked to form a ring.

[0175] In this context, “the adjacent substituent R x , R1, R y1 "can be optionally connected to form a ring" is intended to mean that adjacent groups of substituents, for example, between two substituents R1, between two substituents R x Between the substituents R1 and R x Between the two substituents R y1 Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0176] In this context, “the adjacent substituent R u"can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, substituents R u and the substituent R u Any one or more of these substituents may be connected to form a ring. Obviously, none of these substituents may be connected to form a ring.

[0177] According to one embodiment of the present invention, m is selected from 1.

[0178] According to one embodiment of the present invention, in the first metal complex, X is selected from O, S or Se the same or differently each time it appears; preferably, X is selected from O or S, and more preferably, X is selected from O.

[0179] According to one embodiment of the present invention, the first metal complex, wherein the R y1 Selected from the group consisting of deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, and combinations thereof.

[0180] According to one embodiment of the present invention, the first metal complex, wherein the R y1 Each occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1-6 carbon atoms, substituted or unsubstituted cycloalkyl having 3-6 ring carbon atoms, substituted or unsubstituted aryl having 6-12 carbon atoms, substituted or unsubstituted heteroaryl having 6-18 carbon atoms, and combinations thereof.

[0181] According to one embodiment of the present invention, the first metal complex, wherein the R y1 Each occurrence is identically or differently selected from the group consisting of substituted or unsubstituted alkyl having 3 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, and combinations thereof.

[0182] According to one embodiment of the present invention, the first metal complex, wherein X3-X8 each time appears, is selected from CR x ; said R xEach occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, cyano, and combinations thereof.

[0183] According to one embodiment of the present invention, the first metal complex, wherein at least two of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclyl having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted cycloalkyl ... substituted or 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 alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof.

[0184] According to one embodiment of the present invention, the first metal complex, wherein at least two of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, and combinations thereof.

[0185] According to one embodiment of the present invention, the first metal complex, wherein at least two of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, and combinations thereof.

[0186] According to one embodiment of the present invention, the first metal complex, wherein at least two of X3-X8 are selected from CR x , and one of the R x is cyano; the other R x Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, and combinations thereof.

[0187] According to one embodiment of the present invention, the first metal complex, wherein at least three of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x is selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms; the other R x Selected from the group consisting of 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 a combination thereof.

[0188] According to one embodiment of the present invention, at least one of X3-X8 is CR x , and the R x It is cyano or fluorine.

[0189] According to one embodiment of the present invention, at least one of X5-X8 is CR x , and the R x It is cyano or fluorine.

[0190] According to one embodiment of the present invention, at least one of X7-X8 is CR x , and the R x It is cyano or fluorine.

[0191] According to one embodiment of the present invention, X7 is CRx, and Rx is cyano.

[0192] According to one embodiment of the present invention, the first metal complex, wherein U1-U8 each time appears, is selected from CR u , and the R u Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, and combinations thereof.

[0193] According to one embodiment of the present invention, R u Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 12 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 12 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 12 carbon atoms, and combinations thereof.

[0194] According to one embodiment of the present invention, the first metal complex, wherein R u Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, neopentyl, tert-butyl, cyclopentyl, cyclohexyl, deuterated methyl, deuterated ethyl, deuterated propyl, deuterated isopropyl, deuterated n-butyl, deuterated isobutyl, deuterated neopentyl, deuterated tert-butyl, deuterated cyclopentyl, deuterated cyclohexyl, phenyl, pyridyl, trimethylsilyl, trimethylgermanyl, and combinations thereof.

[0195] According to one embodiment of the present invention, the first metal complex is selected from the group consisting of metal complexes GD-1-1 to GD-1-102, GD-2-1 to GD-2-130, and GD-3-1 to GD-3-60, and the structures of GD-1-1 to GD-1-102, GD-2-1 to GD-2-130, and GD-3-1 to GD-3-60 are as shown in claim 10.

[0196] According to another embodiment of the present invention, in the first compound, Y is selected from O or S.

[0197] According to one embodiment of the present invention, in the first compound, E3 is C, and L is connected.

[0198] According to one embodiment of the present invention, each occurrence of E1-E5 is identically or differently selected from C or CR e , and one of E1 and E2 is selected from C and has the same structure and / or Y1-Y4 are selected from C or CR at each occurrence, the same or different y , and one of Y1 to Y4 is selected from C and connected to L, and Y5-Y8 is selected from CR the same or different each time it appears y ; and / or Z is selected from CR in the same or different manner at each occurrence z .

[0199] According to another embodiment of the present invention, L 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, and combinations thereof, at each occurrence, the same or different;

[0200] Preferably, L is selected, at each occurrence, identically or differently, from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted triphenylene, a substituted or unsubstituted carbazolylene, a substituted or unsubstituted dibenzofuranylene, a substituted or unsubstituted dibenzothiophenylene, and combinations thereof.

[0201] More preferably, L, at each occurrence, is a single bond, or a substituted or unsubstituted phenylene group.

[0202] According to one embodiment of the present invention, Ar1 and Ar2 are identically or differently selected from substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms, or combinations thereof.

[0203] According to one embodiment of the present invention, Ar1 and Ar2 are identically or differently selected from substituted or unsubstituted aromatic groups having 6 to 20 carbon atoms each time they appear.

[0204] According to one embodiment of the present invention, Ar1 and Ar2 are identically or differently selected from substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms each time they appear.

[0205] According to one embodiment of the present invention, Ar1 and Ar2 are selected from the following group each time they appear, the same or different: substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted phenanthryl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, and combinations thereof.

[0206] According to one embodiment of the present invention, L1 and L2 are identically or differently 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 at each occurrence;

[0207] Preferably, L1 and L2 are identically or differently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted pyridylene, or a combination thereof at each occurrence;

[0208] More preferably, L1 and L2 are identically or differently selected at each occurrence from a single bond, or a substituted or unsubstituted phenylene group.

[0209] According to one embodiment of the present invention, the first compound, wherein, when L1 is selected from a single bond, and L2 is selected from 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, the Ar2 is selected from the group consisting of a substituted or unsubstituted aryl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, and a combination thereof.

[0210] According to one embodiment of the present invention, the first compound, wherein, when L2 is selected from a single bond, and L1 is selected from 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, the Ar1 is selected from the group consisting of: a substituted or unsubstituted aryl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, and a combination thereof.

[0211] According to one embodiment of the present invention, the first compound, wherein, when L1 is selected from a single bond, and L2 is selected from 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, the Ar2 is selected from the group consisting of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, and a combination thereof.

[0212] According to one embodiment of the present invention, the first compound, wherein, when L2 is selected from a single bond, and L1 is selected from 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, the Ar1 is selected from the group consisting of a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted phenanthrenyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted fluorenyl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, and a combination thereof.

[0213] According to one embodiment of the present invention, R e , R y and R z Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted aryl having 6-20 carbon atoms, substituted or unsubstituted heteroaryl having 3-20 carbon atoms, cyano, and combinations thereof.

[0214] According to one embodiment of the present invention, R e , R y and R z Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 12 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 10 ring carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 18 carbon atoms, cyano, and combinations thereof.

[0215] According to one embodiment of the present invention, R e , R y and R z The group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, cyano, and combinations thereof is selected at each occurrence, the same or different.

[0216] According to one embodiment of the present invention, the first compound is selected from the group consisting of compounds A-1 to A-288, and the structures of compounds A-1 to A-288 are as shown in claim 18.

[0217] According to one embodiment of the present invention, when the first compound is selected from:

[0218] When the first metal complex is not:

[0219]

[0220] According to one embodiment of the present invention, when the first compound is selected from:

[0221]

[0222] When; the first metal complex is not:

[0223] According to one embodiment of the present invention, the organic layer further comprises a second compound, which comprises at least one chemical group selected from the group consisting of benzene, pyridine, aromatic amine, carbazole, azacarbazole, indolecarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, fluorene, silylfluorene, naphthalene, phenanthrene, and combinations thereof.

[0224] According to one embodiment of the present invention, the second compound comprises at least one chemical group selected from the group consisting of benzene, aromatic amine, carbazole, indolecarbazole, fluorene, dibenzothiophene, dibenzofuran, and combinations thereof.

[0225] According to one embodiment of the present invention, the second compound has a structure represented by Formula 3 or Formula 4:

[0226]

[0227] in,

[0228] G is selected, identically or differently, from C(R g )2, NR g , O or S;

[0229] L T Each occurrence is identically or differently 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 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;

[0230] Each occurrence of T is selected from C, CR t or N;

[0231] R t , R g Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted Alkynyl groups having 2 to 20 carbon atoms, substituted or 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 alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof;

[0232] Ar3 and Ar4 are identically or differently selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, and combinations thereof at each occurrence;

[0233] Adjacent substituent R t , R g Can optionally be linked to form a ring.

[0234] In this context, “the adjacent substituent R t , R g "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R t Between the two substituents R g Between, the substituent R t and R g Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0235] According to one embodiment of the present invention, the second compound has a structure represented by one of Formula 3-a to Formula 3-j, Formula 4-a to Formula 4-f:

[0236]

[0237]

[0238] in,

[0239] Each occurrence of T is selected from CR t or N;

[0240] G is selected, identically or differently, from C(R g )2, NR g , O or S; when multiple R g When multiple R g Same or different;

[0241] L T Each occurrence is identically or differently 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 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;

[0242] Ar3 and Ar4 are identically or differently selected at each occurrence from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or combinations thereof;

[0243] R t and R g Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted Alkynyl groups having 2 to 20 carbon atoms, substituted or 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 alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof;

[0244] Adjacent substituent R t , R g Can optionally be linked to form a ring.

[0245] According to one embodiment of the present invention, the second compound is selected from the group consisting of compound PH-1 to compound PH-115, and the compound PH-1 to compound PH-115 are selected from the structure shown in claim 21.

[0246] Optionally, hydrogen in the above compounds PH-1 to PH-115 can be partially or completely replaced by deuterium.

[0247] According to an embodiment of the present invention, the organic electroluminescent device further comprises a hole injection layer, which can be a single material functional layer or a functional layer comprising multiple materials, wherein the multiple materials comprised are most commonly hole transport materials doped with a certain proportion of p-type conductive doping materials. Common p-type doping materials include:

[0248]

[0249] According to another embodiment of the present invention, in the light-emitting layer, the first metal complex is doped in the first compound and the second compound, and the weight of the metal complex accounts for 1% to 30% of the total weight of the light-emitting layer.

[0250] According to another embodiment of the present invention, the weight of the metal complex accounts for 3%-13% of the total weight of the light-emitting layer.

[0251] According to one embodiment of the present invention, the first compound is a first host compound.

[0252] According to one embodiment of the present invention, the second compound is a second host compound.

[0253] According to another embodiment of the present invention, a composition is further disclosed, which includes the first metal complex having the structure of Formula 1 and the first compound having the structure of Formula 2.

[0254] According to another embodiment of the present invention, an organic layer is disclosed, which comprises the composition described in the above embodiment.

[0255] According to another embodiment of the present invention, a display component is also disclosed, which includes the organic electroluminescent device described in any of the above embodiments, or includes the organic layer described in the above embodiments.

[0256] According to another embodiment of the present invention, an electronic device is also disclosed, which includes the organic electroluminescent device described in any of the above embodiments, or includes the organic layer described in the above embodiments, or includes the display component described in the above embodiments.

[0257] Combination with other materials

[0258] The materials for specific layers in the organic light-emitting device described in the present invention can be used in combination with various other materials present in the device. The combination of these materials is described in detail in paragraphs 0132-0161 of U.S. Patent Application US2016 / 0359122A1, the entire contents of which are incorporated herein by reference. The materials described or mentioned therein 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 consult the literature to identify other materials that can be used in combination.

[0259] The materials described herein as specific layers that can be used in organic light-emitting devices can be used in combination with a variety of other materials present in the device. For example, the compounds disclosed herein can be used in combination with a variety of luminescent dopants, hosts, transport layers, barrier layers, injection layers, electrodes, and other layers that may be present. The combination of these materials is described in detail in paragraphs 0080-0101 of U.S. Patent Application US2015 / 0349273A1, the entire contents of which are incorporated herein by reference. The materials described or mentioned therein 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 consult the literature to identify other materials that can be used in combination.

[0260] The first metal complex, the first compound and the second compound used in the present invention can be easily obtained by referring to the preparation methods in the prior art or the applicant's prior application. For example, the first metal complex of the present invention can be prepared by referring to US20200251666A1, US20220259239A1, US20230058719A1, US20230047519A1, and US20230189629A1, and the first compound of the present invention can be prepared by referring to CN 2024108062457, CN2024110415298, CN2024108612584, CN2024108497764, US2019214570A1, TW201726660A, WO2020262861A1, CN117836292A, WO2023200282A1, CN117624142A, the second compound of the present invention can be prepared by referring to US2019198780 A1, CN115368293 A, and the preparation method thereof is not described here. The above-listed documents are only exemplary, and those skilled in the art can easily obtain other documents.

[0261] The preparation method of the electroluminescent device is not limited. The preparation method of the following embodiment is only an example and should not be construed as limiting. A person skilled in the art can reasonably improve the preparation method of the following embodiment based on the prior art. For example, the ratio of various materials in the light-emitting layer is not particularly limited. A person 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 material, the main material can account for 80%-99%, and the light-emitting material can account for 1%-20%; or the main material can account for 90%-99%, and the light-emitting material can account for 1%-10%; or the main material can account for 94%-99%, and the light-emitting material can account for 1%-6%. In addition, the main material can be one or two materials, and the ratio of the two main materials to the main material can be 99:1 to 1:99; or, the ratio can be 80:20 to 20:80; or, the ratio can be 60:40 to 40:60. In the embodiments of the device, the characteristics of the device are also tested using conventional equipment in the field (including but not limited to the vapor deposition machine produced by Angstrom Engineering, the optical testing system and life testing system produced by Suzhou Fusida, the ellipsometer produced by Beijing Liangtuo, etc.) using methods familiar to those skilled in the art.

[0262] Device Embodiment

[0263] Device Example 1

[0264] First, the glass substrate with an 80nm thick indium tin oxide (ITO) anode was cleaned and then treated with oxygen plasma and UV ozone. After treatment, the substrate was dried in a glove box to remove moisture. The substrate was then mounted on a substrate holder and loaded into a vacuum chamber. The organic layers specified below were placed in a vacuum of approximately 10 -8 Compound HT and compound HT1 were co-deposited as a hole injection layer (HIL, weight ratio 97:3) with a thickness of Compound HT was used as a hole transport layer (HTL) with a thickness of Compound PH-1 was used as an electron blocking layer (EBL) with a thickness of Then the metal complex GD-1-65 was doped in the compound PH-1 and the compound A-34 and co-deposited as an emitting layer (EML, weight ratio 6:52:42) with a thickness of Compound HB was used as the hole blocking layer (HBL) with a thickness of On the hole blocking layer, compound ET and 8-hydroxyquinoline-lithium (Liq) were co-evaporated as an electron transport layer (ETL, weight ratio 40:60) with a thickness of Finally, 1 nm thick 8-hydroxyquinoline-lithium (Liq) was evaporated as an electron injection layer, and 120 nm of aluminum was evaporated as a cathode. The device was then transferred back to the glove box and encapsulated with a glass cover and a moisture absorbent to complete the device.

[0265] Device Example 2

[0266] Device Example 2 was prepared the same as Device Example 1, except that Compound A-35 was used instead of Compound A-34 in the emissive layer (EML).

[0267] Device Example 3

[0268] Device Example 3 was prepared the same as Device Example 1, except that Compound A-69 was used instead of Compound A-34 in the emissive layer (EML).

[0269] Device Example 4

[0270] Device Example 4 was prepared the same as Device Example 1, except that Compound A-257 was used instead of Compound A-34 in the emissive layer (EML).

[0271] Device Example 5

[0272] The preparation of device example 5 was the same as that of device example 1, except that compound A-67 was used instead of compound A-34 in the light emitting layer (EML), and the weight ratio of the EML layer was changed to 6:47:47.

[0273] Device Example 6

[0274] The preparation of Device Example 6 was the same as that of Device Example 1, except that Compound A-287 was used in the light emitting layer (EML) instead of Compound A-34, and the weight ratio of the EML layer was changed to 6:47:47.

[0275] Device Comparison Example 1

[0276] The preparation of device Comparative Example 1 was the same as that of device Example 1, except that compound C-1 was used instead of compound A-34 of the present invention in the emission layer (EML).

[0277] The detailed device layer structure and thickness are shown in the table below. For layers using more than one material, different compounds are doped in the weight ratios recorded.

[0278] Table 1 Device structures of Examples 1-6 and Comparative Example 1

[0279]

[0280]

[0281] The material structure used in the device is shown below:

[0282]

[0283]

[0284] Table 2 shows that at 15 mA / cm 2 Device CIE data, external quantum efficiency (EQE) and current efficiency (CE) measured at constant current density; and at 80mA / cm 2 The device lifetime (LT95) measured under constant current density, wherein the device lifetime is normalized based on the data of Comparative Example 1.

[0285] Table 2 Device data of Examples 1 to 6 and Comparative Example 1

[0286]

[0287]

[0288] Discussion: It can be seen from the data in Table 2 that the device examples 1 to 6 using the first metal complex and the first compound provided by the present invention as light-emitting layer materials all have longer device life and better overall device performance.

[0289] Examples 1 to 6 used different first compounds within the scope of the present invention, and their device performance achieved better results in terms of efficiency EQE and CE, as well as device life.

[0290] Among them, the difference between Examples 1 to 4 and Comparative Example 1 is that Examples 1 to 4 use the first metal complex and the first compound provided by the present invention at the same time, while Comparative Example 1 uses the first metal complex provided by the present invention and the first compound outside the present invention. It can be seen from the data in Table 2 that compared with Comparative Example 1, Examples 1 to 4 not only achieve a significant improvement of 45%-205% in life, but also achieve better results in EQE and CE.

[0291] Similarly, Examples 5 and 6 also simultaneously used the first metal complex and the first compound provided by the present invention in the light-emitting layer of the device. Compared with Comparative Example 1, Examples 5 and 6 not only achieved a significant improvement of 55%-106% in device life, but also further improved EQE and CE.

[0292] Device Example 7

[0293] The preparation of device example 7 is the same as that of device example 1, except that compound A-185 is used instead of compound A-34, compound PH-44 is used instead of compound PH-1 in the light-emitting layer (EML), and the weight ratio of the EML layer is changed to 6:42:52.

[0294] Device Example 8

[0295] Device Example 8 was prepared the same as Device Example 1, except that metal complex GD-1-46 was used instead of metal complex GD-1-65 in the light emitting layer (EML).

[0296] The detailed device layer structure and thickness are shown in the table below. For layers using more than one material, different compounds are doped in the weight ratios recorded.

[0297] Table 3 Device structures of Examples 7-8

[0298]

[0299] The material structure used in the device is shown below:

[0300]

[0301] Table 4 shows that at 15 mA / cm 2 Device CIE data, external quantum efficiency (EQE) and current efficiency (CE) measured at constant current density; and at 80mA / cm 2 The device lifetime (LT95) measured under constant current density, wherein the device lifetime is normalized based on the data of Comparative Example 1.

[0302] Table 4 Device data of Example 7-Example 8

[0303]

[0304] Discussion: From the data in Table 4, it can be seen that the device Examples 7-8 using the first metal complex and the first compound provided by the present invention as the light-emitting layer materials have longer device life and better comprehensive device performance. Example 7 uses the first metal complex and the first compound within the scope of the present invention, and uses different second compounds. According to its data, it can be seen that it still achieves good EQE and CE effects, and at the same time obtains a more significant improvement in life, which is 225% higher than that of Comparative Example 1. It can be seen that the first metal complex and the first compound within the scope of the present invention can be used in combination with different second compounds, and have broad application prospects.

[0305] Example 8 uses a first metal complex different from Examples 1-7 within the scope of the present invention. According to its device effect, although its EQE and CE are slightly lower than those of Comparative Example 1, they are still at a relatively high level in the industry. At the same time, Example 8 has a significant improvement in lifespan, which is 164% higher than that of Comparative Example 1. It can be seen that the combination of different first metal complexes and first compounds within the scope of the present invention can achieve good comprehensive device performance and has broad application prospects.

[0306] Device Example 9

[0307] The preparation of device example 9 is the same as that of device example 2, except that compound metal complex GD-1-38 is used instead of metal complex GD-1-65 in the light-emitting layer (EML), PH-75 is used instead of compound PH-1, and the weight ratio of the EML layer is changed to 6:66:28.

[0308] Device Example 10

[0309] The preparation of device example 10 was the same as that of device example 9, except that the compound metal complex GD-1-101 was used in the light emitting layer (EML) instead of the metal complex GD-1-38.

[0310] Device Example 11

[0311] Device Example 11 was prepared the same as Device Example 9, except that the compound metal complex GD-1-39 was used in the light emitting layer (EML) instead of the metal complex GD-1-38.

[0312] Device Example 12

[0313] The preparation of device example 12 was the same as that of device example 9, except that compound metal complex GD-1-102 was used instead of metal complex GD-1-38 in the light emitting layer (EML), and the weight ratio of the EML layer was changed to 6:56:38.

[0314] The detailed device layer structure and thickness are shown in the table below. For layers using more than one material, different compounds are doped in the weight ratios recorded.

[0315] Table 5 Device structures of Examples 9 to 12

[0316]

[0317]

[0318] The material structure used in the device is shown below:

[0319]

[0320] Table 6 shows that at 15 mA / cm 2 Device CIE data measured at constant current density; and at 80mA / cm 2 The device lifetime (LT95) measured under constant current density, wherein the device lifetime is normalized based on the data of Comparative Example 1.

[0321] Table 6 Device data of Examples 9 to 12

[0322]

[0323] discuss:

[0324] Examples 9 to 12 are devices obtained by using the first metal complex and the first compound in the scope of the present invention in combination with different second compounds. According to the device data, they have achieved extremely significant improvement in lifespan, which is 431-467% higher than that of Comparative Example 1. It can be seen that the first metal complex and the first compound in the scope of the present invention can be used in combination with different second compounds to obtain better device performance.

[0325] In summary, when the first metal complex and the first compound provided by the present invention are used as light-emitting layer materials in organic electroluminescent devices, the electron and hole transport balance ability of the material is improved, the overall performance of the device is greatly improved, the device efficiency (EQE and CE) is higher, and the device life is unexpectedly significantly improved, which has broad application prospects.

[0326] It should be understood that the various embodiments described herein are only examples and are not intended to limit the scope of the present invention. Therefore, as will be apparent to those skilled in the art, the claimed invention may include variations of the specific embodiments and preferred embodiments described herein. Many of the materials and structures described herein may be replaced with other materials and structures without departing from the spirit of the present invention. It should be understood that the various theories about why the present invention works are not intended to be restrictive.

Claims

1. An organic electroluminescent device, comprising: anode, cathode, and an organic layer disposed between the anode and the cathode, the organic layer comprising at least a first metal complex and a first compound; The first metal complex comprises a metal M and a ligand L coordinated with the metal M. a , L a Having a structure represented by Formula 1: in, The metal M is selected from metals with a relative atomic mass greater than 40; Cy is selected, at each occurrence, identically or differently, from substituted or unsubstituted aryl having 5 to 24 ring atoms, or substituted or unsubstituted heteroaryl having 5 to 24 ring atoms, or a combination thereof; The Cy is connected to the metal M via G1; G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S; X1-X4 are selected from C, CR in the same or different manner at each occurrence x or N; and at least one of X1-X4 is selected from C and is connected to Cy; When X1, X2, X3 or X4 connected to G2 is selected from N, G2 is selected from a single bond, and the X1, X2, X3 or X4 is connected to the metal M through G2 to form a metal-nitrogen bond; when X1, X2, X3 or X4 connected to G2 is selected from C, G2 is selected from a single bond, O or S, and the X1, X2, X3 or X4 is connected to the metal M through G2; X5-X8 are selected from CR in the same or different way each time they appear. x or N; X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1 at each occurrence; when two R1s are present at the same time, the two R1s are the same or different; R x and R1, at each occurrence, is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R1, R x can optionally be linked to form a ring; Wherein, the first compound has a structure represented by Formula 2: In formula 2, Y is selected from CR y R y , NR y , O, S or Se; Each occurrence of E1-E5 is selected from C, CR e or N, and one of E1 and E2 is selected from C, and the structure shown in formula 2 connected; the other of E1 and E2 or one of E3-E5 is selected from C and connected to L; Y1-Y4 are selected from C, CR y or N; and one of Y1 to Y4 is selected from C and is connected to L; Each occurrence of Y5-Y8 is selected from CR y or N; Each time Z appears, it is selected from CR z or N; L is identically or differently selected at each occurrence 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; L1 and L2 are identically or differently 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; Ar1 and Ar2 are identically or differently selected at each occurrence from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or combinations thereof; R e , R y and R z The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituent R e can optionally be linked to form a ring; Adjacent substituent R y can optionally be linked to form a ring; Adjacent substituent R z Can optionally be linked to form a ring.

2. The organic electroluminescent device according to claim 1, wherein: C y Each occurrence is identically or differently selected from any one of the following groups: in, R, when present at each occurrence, is identical or different and represents mono-, poly- or unsubstituted; R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R can optionally be linked to form a ring; Preferably, Cy is selected from Wherein, "#" indicates the position connected to the metal M through G1; "*" indicates the position where Cy is connected to one of X1, X2, X3 or X4 in Formula 1.

3. The organic electroluminescent device according to any one of claims 1 to 2, wherein: Metal complexes have M(L a ) m (L b ) n (L c ) q wherein the metal M is selected from the group consisting of Cu, Ag, Au, Ru, Rh, Pd, Os, Ir and Pt at each occurrence; preferably, the metal M is selected from Pt or Ir at each occurrence at the same or different times; L a , L b and L c are the first, second and third ligands coordinated to the metal M, and L c and the L a or L b are the same or different; where L a , L b and L c can optionally be linked to form a multidentate ligand; m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, m+n+q is equal to the oxidation state of metal M; when m is greater than or equal to 2, multiple L a The same or different; when n is equal to 2, the two L b The same or different; when q is equal to 2, the two L c Same or different; L b and L c Each occurrence is identically or differently selected from any one of the following groups: in, X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 , CR C1 R C2 ; R a and R b Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted; R a , R b , R c , R N1 , R C1 and R C2 The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 Can optionally be linked to form a ring.

4. The organic electroluminescent device according to claim 3, wherein: The metal complex has Ir(L a ) m (L b ) 3-m The general structure of the formula 5 is: in, m is selected from 1, 2 or 3; when m is selected from 1, two L b The same or different; when m is selected from 2 or 3, multiple L a The same or different; preferably, m is selected from 1; X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1; when two R1s are present at the same time, the two R1s are the same or different; U1-U8 are selected from CR in the same or different way each time they appear. u or N; X3-X8 are selected from CR in the same or different way each time they appear x or N; Y9-Y 12 Each occurrence is the same or different selection from CR y1 or N; R y1 , R x , R1 and R u The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituent R x , R1, R y1 can optionally be linked to form a ring; Adjacent substituent R u Can optionally be linked to form a ring.

5. The organic electroluminescent device according to claim 4, wherein: X is selected, identically or differently, at each occurrence from O, S or Se; preferably, X is selected from O or S, more preferably, X is selected from O.

6. The organic electroluminescent device according to any one of claims 4 to 5, wherein: The R y1 Selected from the group consisting of deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, and combinations thereof; Preferably, the R y1 Each occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, substituted or unsubstituted heteroaryl having 6 to 18 carbon atoms, and combinations thereof; More preferably, the R y1 Each occurrence is identically or differently selected from the group consisting of substituted or unsubstituted alkyl having 3 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, and combinations thereof.

7. The organic electroluminescent device according to any one of claims 1 to 5, wherein: X3-X8 are selected from CR in the same or different way each time they appear x ; said R x each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, cyano, and combinations thereof; Preferably, at least two of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclyl having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted cycloalkyl ... substituted or 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 alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof; Preferably, at least two of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, and combinations thereof; Preferably, at least two of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, and combinations thereof; More preferably, at least two of X3-X8 are selected from CR x , and one of the R x is cyano; the other R x Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, and combinations thereof; More preferably, at least three of X3-X8 are selected from CR x , and one of the R x is cyano or fluorine; the other R x is selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms; the other R x Selected from the group consisting of 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 a combination thereof.

8. The organic electroluminescent device according to any one of claims 1 to 5, wherein: At least one of X3-X8 is selected from CR x , and the R x is selected from cyano or fluorine; preferably, at least one of X5-X8 is CR x , and the R x is cyano or fluorine; Preferably, at least one of X7-X8 is CR x , and the R x is cyano or fluorine; More preferably, X7 is CR x , and the R x It's cyano.

9. The organic electroluminescent device according to claim 4, wherein: U1-U8 are selected from CR in the same or different way each time they appear. u , and the R u Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, and combinations thereof; Preferably, R u each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 12 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 12 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 12 carbon atoms, and combinations thereof; More preferably, R u Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, methyl, ethyl, propyl, isopropyl, n-butyl, isobutyl, neopentyl, tert-butyl, cyclopentyl, cyclohexyl, deuterated methyl, deuterated ethyl, deuterated propyl, deuterated isopropyl, deuterated n-butyl, deuterated isobutyl, deuterated neopentyl, deuterated tert-butyl, deuterated cyclopentyl, deuterated cyclohexyl, phenyl, pyridyl, trimethylsilyl, trimethylgermanyl, and combinations thereof.

10. The organic electroluminescent device according to any one of claims 1 to 9, wherein: The first metal complex is selected from the group consisting of metal complexes GD-1-1 to GD-1-102, GD-2-1 to GD-2-130, GD-3-1 to GD-3-60, and the structures of GD-1-1 to GD-1-102, GD-2-1 to GD-2-130, GD-3-1 to GD-3-60 are shown below: Optionally, hydrogen in the metal complexes GD-1-1 to GD-1-102, GD-2-1 to GD-2-130, GD-3-1 to GD-3-40, GD-3-42 to GD-3-43, GD-3-46 to GD-3-52, GD-3-54, GD-3-56 to GD-3-60 can be partially or completely replaced by deuterium.

11. The organic electroluminescent device according to claim 1, wherein: The first compound, wherein the Y is selected from O or S.

12. The organic electroluminescent device according to claim 1, wherein: Each occurrence of E1-E5 is selected from C or CR, either identically or differently. e , and one of E1 and E2 is selected from C and has the same structure and / or Y1-Y4 are selected from C or CR at each occurrence, the same or different y , and one of Y1 to Y4 is selected from C and connected to L, and Y5-Y8 is selected from CR the same or different each time it appears y ; and / or Z is selected from CR in the same or different manner at each occurrence z .

13. The organic electroluminescent device according to claim 1, wherein: L is identically or differently selected at each occurrence 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, and combinations thereof; Preferably, L is selected, at each occurrence, identically or differently, from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted triphenylene, a substituted or unsubstituted carbazolylene, a substituted or unsubstituted dibenzofuranylene, a substituted or unsubstituted dibenzothiophenylene, and combinations thereof; More preferably, L, at each occurrence, is a single bond, or a substituted or unsubstituted phenylene group.

14. The organic electroluminescent device according to claim 1, wherein: Ar1 and Ar2 are identically or differently 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, Ar1 and Ar2 are selected from the group consisting of substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted phenanthrenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, and combinations thereof, at each occurrence.

15. The organic electroluminescent device according to claim 1, wherein: L1 and L2 are identically or differently selected at each occurrence 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, L1 and L2 are identically or differently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted pyridylene, or a combination thereof at each occurrence; More preferably, L1 and L2 are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted phenylene group, or a combination thereof.

16. The organic electroluminescent device according to claim 1, wherein: When L1 is selected from a single bond, and L2 is selected from 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, Ar2 is selected from the group consisting of a substituted or unsubstituted aryl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, and a combination thereof; Or, when L2 is selected from a single bond, and L1 is selected from 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, Ar1 is selected from the group consisting of a substituted or unsubstituted aryl group, a substituted or unsubstituted carbazolyl group, a substituted or unsubstituted dibenzofuranyl group, and a combination thereof.

17. The organic electroluminescent device according to claim 1, wherein R e , R y and R z each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms, cyano, and combinations thereof; Preferably, R e , R y and R z each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 12 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 10 ring carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 18 carbon atoms, cyano, and combinations thereof; Preferably, R e , R y and R z The group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, cyano, and combinations thereof is selected at each occurrence, the same or different.

18. The organic electroluminescent device according to any one of claims 1, 14 to 17, wherein the first compound is selected from the group consisting of compounds A-1 to A-288, and the structures of the compounds A-1 to A-288 are as follows: Optionally, hydrogen in the compounds A-1 to A-288 can be partially or fully replaced by deuterium.

19. The organic electroluminescent device of claim 1, wherein the organic layer further comprises a second compound, wherein the second compound comprises at least one chemical group selected from the group consisting of benzene, pyridine, aromatic amine, carbazole, azacarbazole, indolecarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, fluorene, silylfluorene, naphthalene, phenanthrene, and combinations thereof; Preferably, the second compound comprises at least one chemical group selected from the group consisting of benzene, aromatic amine, carbazole, indolecarbazole, fluorene, dibenzothiophene, dibenzofuran, and combinations thereof.

20. The organic electroluminescent device according to claim 19, wherein the second compound has a structure represented by Formula 3 or Formula 4: in, G is selected, identically or differently, from C(R g )2, NR g , O or S; L T Each occurrence is identically or differently 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 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof; Each occurrence of T is selected from C, CR t or N; R t , R g Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted Alkynyl groups having 2 to 20 carbon atoms, substituted or 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 alkylgermanyl groups having 3 to 20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, substituted or unsubstituted amino groups having 0 to 20 carbon atoms, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof; Ar3 and Ar4 are identically or differently selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, and combinations thereof at each occurrence; Adjacent substituent R t , R g Can optionally be linked to form a ring.

21. The organic electroluminescent device according to any one of claims 19 to 20, wherein the second compound is selected from the group consisting of the following compounds PH-1 to PH-115, and the structures of the compounds PH-1 to PH-115 are shown below: Optionally, hydrogen in the compounds PH-1 to PH-115 can be partially or completely replaced by deuterium.

22. A composition comprising a first metal complex and a first compound, wherein: The first metal complex comprises a metal M and a ligand L coordinated to the metal M. a , L a Having a structure represented by Formula 1: The first metal complex comprises a metal M and a ligand La coordinated with the metal M, wherein La has a structure represented by Formula 1: in, The metal M is selected from metals with a relative atomic mass greater than 40; Cy is selected, at each occurrence, identically or differently, from substituted or unsubstituted aryl having 5 to 24 ring atoms, or substituted or unsubstituted heteroaryl having 5 to 24 ring atoms, or a combination thereof; The Cy is connected to the metal M via G1; G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S; X1-X4 are selected from C, CR in the same or different manner at each occurrence x or N; and at least one of X1-X4 is selected from C and is connected to Cy; When X1, X2, X3 or X4 connected to G2 is selected from N, G2 is selected from a single bond, and the X1, X2, X3 or X4 is connected to the metal M through G2 to form a metal-nitrogen bond; when X1, X2, X3 or X4 connected to G2 is selected from C, G2 is selected from a single bond, O or S, and the X1, X2, X3 or X4 is connected to the metal M through G2; X is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1 and GeR1R1 at each occurrence; when two R1s are present at the same time, the two R1s are the same or different; R x and R1, at each occurrence, is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; At least one of X1-X8 is CR x , and the R x is cyano or fluorine; Adjacent substituents R1, R x can optionally be linked to form a ring; Wherein, the first compound has a structure represented by Formula 2: In formula 2, Y is selected from CR y R y , NR y , O, S or Se; Each occurrence of E1-E5 is selected from C, CR e or N, and one of E1 and E2 is selected from C, and the structure shown in formula 2 connected; the other of E1 and E2 or one of E3-E5 is selected from C and connected to L; Y1-Y4 are selected from C, CR y or N; and one of Y1 to Y4 is selected from C and is connected to L; Each occurrence of Y5-Y8 is selected from CR y or N; Each time Z appears, it is selected from CR z or N; L is identically or differently selected at each occurrence 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; L1 and L2 are identically or differently 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; Ar1 and Ar2 are identically or differently selected at each occurrence from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or combinations thereof; R e , R y and R z The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl 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 alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl 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 carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituent R e can optionally be linked to form a ring; Adjacent substituent R y can optionally be linked to form a ring; Adjacent substituent R z Can optionally be linked to form a ring.

23. An organic layer comprising the composition of claim 22.

24. A display component comprising the organic electroluminescent device according to any one of claims 1 to 21 or the composition according to claim 22, or the organic layer according to claim 23.

25. An electronic device comprising the organic electroluminescent device according to any one of claims 1 to 21 or the composition according to claim 22, or the organic layer according to claim 23, or the display component according to claim 24.

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