Organic electroluminescent material and device thereof

Abstract

Organic electroluminescent materials and devices thereof are disclosed. The organic electroluminescent material is a metal complex containing a La ligand with a specific substituent and a specific Lb ligand, wherein the structure of the La ligand is shown in the formula 1. When the novel metal complexes are applied to electroluminescent devices, the current efficiency, the power efficiency and the external quantum efficiency of the devices can be improved, excellent device performance can be kept, the comprehensive performance of the devices can be improved, and the novel metal complexes have huge advantages and wide prospects in industrial application. Also disclosed are an organic electroluminescent device comprising the metal complex and a composition comprising the metal complex.

Description

Technical Field

[0001] The present invention relates to compounds for organic electronic devices, such as organic light-emitting devices, and more particularly to a metal complex comprising a structure of Formula 1, an organic electroluminescent device comprising the metal complex, and a compound composition comprising the metal complex. 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 on flexible substrates.

[0004] OLEDs can be divided into three different types based on their light emission mechanism. The OLED invented by Tang and Ebx van Slyke is a fluorescent OLED. It uses only singlet states to emit light. The triplet states generated in the device are 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 emission from heavy metals containing complexes as emitters. Therefore, singlets 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 states to singlet states. 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] CN111655705A discloses a metal complex having the structure shown below: Wherein R5 is selected from halogen, nitrile, nitro, etc., substituted or unsubstituted alkyl with 3 to 30 carbon atoms, and R3 is selected from hydrogen, deuterium, halogen, etc., substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, etc., and the following specific structure is further disclosed: This application does not disclose or teach the metal complex in which R3 is an aryl or heteroaryl group when there is a specific substituent at the R5 position in the metal complex, and the influence of the metal complex on the device performance. Summary of the invention

[0009] The present invention aims to provide a series of metal complexes comprising a structure of Formula 1 to solve at least part of the above problems. The metal complex comprises L of the structure of Formula 1 having a specific substituent a Ligand and specific L b Ligands, these new metal complexes can be used in electroluminescent devices to improve the current efficiency, power efficiency and external quantum efficiency of the devices, which is beneficial to improving the overall performance of the devices.

[0010] According to one embodiment of the present invention, a metal complex having M(L a ) m (L b ) n The general structure of, wherein the metal M is selected from metals with a relative atomic mass greater than 40;

[0011] L a It is the first ligand coordinated with the metal M, L b is the second ligand coordinated to the metal M, and L a With L b are different; among them, L a and L b can optionally be linked to form a multidentate ligand;

[0012] m is selected from 1 or 2, n is selected from 1 or 2, m+n is equal to the oxidation state of metal M; when m is 2, the two L a The same or different; when n is 2, the two L b Same or different;

[0013] L b is a C^N bidentate ligand, a C^C bidentate ligand or an O^O bidentate ligand;

[0014] L a Having a structure represented by Formula 1:

[0015]

[0016] In formula 1,

[0017] Cy is selected, at each occurrence, identically or differently, from an aromatic ring containing Y1 and Y2 having 6 to 24 ring atoms, a heteroaromatic ring containing Y1 and Y2 having 5 to 24 ring atoms, or a combination thereof;

[0018] G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S;

[0019] X1-X3 are selected from C, CR in the same or different manner at each occurrence x or N; and one of X1-X3 is selected from C and connected to Y1;

[0020] When G2 is selected from a single bond, and X1, X2 or X3 is selected from N, the X1, X2 or X3 is connected to the metal through G2 to form a metal-nitrogen bond; or when G2 is selected from a single bond, O or S, and X1, X2 or X3 is selected from C, the X1, X2 or X3 is connected to the metal through G2;

[0021] X4-X7 are selected from CR in the same or different way each time they appear. x or N;

[0022] Y1 and Y2 are selected, at each occurrence, identically or differently, from C or N;

[0023] Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' are the same or different;

[0024] R and R A Each occurrence is the same or different, indicating mono-substitution, poly-substitution, or no substitution. When there are multiple R, the R is the same or different. When there are multiple R A When the R A Same or different;

[0025] Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof;

[0026] R x , R A, R, R' is 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 having 2-20 carbon atoms, -20 carbon atoms, alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkylsilyl, substituted or unsubstituted alkylgermanyl, substituted or unsubstituted alkylgermanyl, substituted or unsubstituted arylgermanyl, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0027] Adjacent substituent R A can optionally be linked to form a ring;

[0028] Adjacent substituents R can optionally be linked to form a ring;

[0029] The adjacent substituents R', R x can optionally be linked to form a ring;

[0030] And any of the following conditions are met:

[0031] 1) When at least one of X1-X7 is CR x , and the R x When it is cyano or fluorine;

[0032] Then R nselected from the group consisting of deuterium, 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 having 2-20 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;

[0033] 2) When R x is selected from hydrogen, deuterium, 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, 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 arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, substituted or unsubstituted arylgermanyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, or a combination thereof;

[0034] Then R n It has a structure represented by formula 2:

[0035]

[0036] In formula 2,

[0037] L is selected from the group consisting of 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, and combinations thereof;

[0038] R1, R2 and R3 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 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 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;

[0039] And the number of carbon atoms contained in formula 2 is greater than or equal to 2;

[0040] Adjacent substituents R1, R2 and R3 can be optionally linked to form a ring;

[0041] “*” indicates the connection position between Formula 2 and Formula 1.

[0042] According to another embodiment of the present invention, an organic electroluminescent device is disclosed, which includes: an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein at least one of the organic layers includes the metal complex described in the above embodiment.

[0043] According to another embodiment of the present invention, a compound composition is also disclosed, which comprises the metal complex described in the above embodiment.

[0044] The present invention aims to provide a series of L comprising the structure of formula 1 a The metal complexes of the ligands can solve at least part of the above problems. These new metal complexes can be used in electroluminescent devices to improve the efficiency of the device and help improve the overall performance of the device. The compounds disclosed in the present invention have great advantages and broad prospects in industrial applications. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 Schematic diagram of an organic light-emitting device that may contain the metal complex disclosed herein and the compound composition containing the metal complex.

[0046] Figure 2 is another schematic diagram of an organic light-emitting device that may contain the metal complex disclosed herein and the compound composition comprising the metal complex. DETAILED DESCRIPTION

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] OLED also requires encapsulation layers, such as Figure 2 The organic light emitting device 200 is schematically and non-limitingly shown. Figure 1 The 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.

[0052] 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.

[0053] The materials and structures described herein may also be used in other organic electronic devices listed above.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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).

[0058] 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.

[0059] 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).

[0060] Definition of Substituent Terms

[0061] Halogen or halide - as used herein includes fluorine, chlorine, bromine and iodine.

[0062] Alkyl - as used herein, includes straight chain and branched alkyl. Alkyl can be an alkyl with 1 to 20 carbon atoms, preferably an alkyl with 1 to 12 carbon atoms, more preferably an alkyl with 1 to 6 carbon atoms. Examples of alkyl 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, alkyl can be optionally substituted.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] Aryl or aromatic group - As used herein, 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, phenanthrene, indene, 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.

[0068] Heterocyclic group - as used herein, non-aromatic cyclic groups are considered. Non-aromatic heterocyclic groups include saturated heterocyclic groups with 3-20 ring atoms and unsaturated non-aromatic heterocyclic groups with 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 with 3 to 7 ring atoms, which include at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxirane, oxetane, tetrahydrofuranyl, tetrahydropyranyl, dioxopentanyl, dioxanyl, aziridinyl, dihydropyrrolyl, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxepinyl, thiepinyl, azacycloheptinyl and tetrahydrothioxyl. In addition, the heterocyclic group may be optionally substituted.

[0069] 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.

[0070] 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.

[0071] 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.

[0072] 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,

[0073] Alkylsilyl - as used herein, encompasses alkyl-substituted silicon groups. Alkylsilyl can be an alkylsilyl having 3-20 carbon atoms, preferably an alkylsilyl having 3 to 10 carbon atoms. The example of an alkylsilyl includes trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyl-tert-butylsilyl, methyldi-tert-butylsilyl. In addition, the alkylsilyl can be optionally substituted.

[0074] Arylsilyl-as used herein, encompasses at least one aryl substituted silicon radical.Arylsilyl can be an arylsilyl with 6-30 carbon atoms, preferably an arylsilyl with 8 to 20 carbon atoms.The example of arylsilyl includes triphenylsilyl, phenyldiphenylsilyl, diphenylbiphenylsilyl, phenyldiethylsilyl, diphenylethylsilyl, phenyldimethylsilyl, diphenylmethylsilyl, phenyldiisopropylsilyl, diphenylisopropylsilyl, diphenylbutylsilyl, diphenylisobutylsilyl, diphenyltert-butylsilyl.In addition, arylsilyl can be optionally substituted.

[0075] Alkylgermanyl - As used herein, alkyl-substituted germanium is encompassed. 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.

[0076] Arylgermanyl - as used herein, encompasses at least one aryl or heteroaryl substituted germanium. Arylgermanyl can be an arylgermanyl having 6-30 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, arylgermanyl can be optionally substituted.

[0077] The term "aza" in azadibenzofuran, azadibenzothiophene, etc. means that one or at least two CH groups in the corresponding aromatic fragment are replaced by nitrogen atoms. 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.

[0078] 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 carboxyl, The acid group, substituted ester group, substituted sulfinyl group, refers to any one of an alkyl group, a cycloalkyl group, a heteroalkyl group, a heterocyclic group, an aralkyl group, an alkoxy group, an aryloxy group, an alkenyl group, an alkynyl group, an aryl group, a heteroaryl group, an alkylsilyl group, an arylsilyl group, an alkylgermanyl group, an arylgermanyl group, an amino group, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a sulfinyl group, a sulfonyl group and a phosphino group, which may be substituted by one or at least two of the following: deuterium, halogen, an unsubstituted alkyl group having 1 to 20 carbon atoms, an unsubstituted alkyl group having 3 to 20 carbon atoms, unsubstituted cycloalkyl having 1 to 20 carbon atoms, unsubstituted heteroalkyl having 1 to 20 carbon atoms, unsubstituted heterocyclyl having 3 to 20 carbon atoms, unsubstituted aralkyl having 7 to 30 carbon atoms, unsubstituted alkoxy having 1 to 20 carbon atoms, unsubstituted aryloxy having 6 to 30 carbon atoms, unsubstituted alkenyl having 2 to 20 carbon atoms, unsubstituted alkynyl having 2 to 20 carbon atoms, unsubstituted aryl having 6 to 30 carbon atoms, unsubstituted The invention also includes but is not limited to substituted heteroaryl groups having 3 to 30 carbon atoms, unsubstituted alkylsilyl groups having 3 to 20 carbon atoms, unsubstituted arylsilyl groups having 6 to 20 carbon atoms, unsubstituted alkylgermanyl groups having 3 to 20 carbon atoms, unsubstituted arylgermanyl groups having 6 to 20 carbon atoms, unsubstituted amino groups, 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 having 0 to 20 carbon atoms.

[0079] 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.

[0080] 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.

[0081] In the compounds mentioned in the present disclosure, multiple substitution 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 multiple substitutions (including disubstitution, trisubstitution, tetrasubstitution, etc.), it means that the substituent can exist in multiple available substitution positions on its connection structure, and the substituents existing in multiple available substitution positions can be of the same structure or different structures.

[0082] 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.

[0083] 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:

[0084]

[0085] 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:

[0086]

[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 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:

[0088]

[0089] 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:

[0090]

[0091] According to one embodiment of the present invention, a metal complex having M(L a ) m (L b ) n The general structure of, wherein the metal M is selected from metals with a relative atomic mass greater than 40;

[0092] L a It is the first ligand coordinated with the metal M, L b is the second ligand coordinated to the metal M, and L a With L b are different; among them, L a and L b can optionally be linked to form a multidentate ligand;

[0093] m is selected from 1 or 2, n is selected from 1 or 2, m+n is equal to the oxidation state of metal M; when m is 2, the two L a The same or different; when n is 2, the two L b Same or different;

[0094] L b is a C^N bidentate ligand, a C^C bidentate ligand or an O^O bidentate ligand;

[0095] L a Having a structure represented by Formula 1:

[0096]

[0097] In formula 1,

[0098] Cy is selected, at each occurrence, identically or differently, from an aromatic ring containing Y1 and Y2 having 6 to 24 ring atoms, a heteroaromatic ring containing Y1 and Y2 having 5 to 24 ring atoms, or a combination thereof;

[0099] G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S;

[0100] X1-X3 are selected from C, CR in the same or different manner at each occurrence x or N; and one of X1-X3 is selected from C and connected to Y1;

[0101] When G2 is selected from a single bond, and X1, X2 or X3 is selected from N, the X1, X2 or X3 is connected to the metal through G2 to form a metal-nitrogen bond; or when G2 is selected from a single bond, O or S, and X1, X2 or X3 is selected from C, the X1, X2 or X3 is connected to the metal through G2;

[0102] X4-X7 are selected from CR in the same or different way each time they appear. x or N;

[0103] Y1 and Y2 are selected, at each occurrence, identically or differently, from C or N;

[0104] Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' are the same or different;

[0105] R and R A Each occurrence is the same or different, indicating mono-substitution, poly-substitution, or no substitution. When there are multiple R, the R is the same or different. When there are multiple R A When the R A Same or different;

[0106] Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof;

[0107] R x , R A , R, R' is 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 having 2-20 carbon atoms, -20 carbon atoms, alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkylsilyl, substituted or unsubstituted alkylgermanyl, substituted or unsubstituted alkylgermanyl, substituted or unsubstituted arylgermanyl, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0108] Adjacent substituent R Acan optionally be linked to form a ring;

[0109] Adjacent substituents R can optionally be linked to form a ring;

[0110] The adjacent substituents R', R x can optionally be linked to form a ring;

[0111] And any of the following conditions are met:

[0112] 1) When at least one of X1-X7 is CR x , and the R x When it is cyano or fluorine;

[0113] Then R n selected from the group consisting of deuterium, 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 having 2-20 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;

[0114] 2) When R xis selected from hydrogen, deuterium, 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, 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 arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, substituted or unsubstituted arylgermanyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, or a combination thereof;

[0115] Then R n It has a structure represented by formula 2:

[0116]

[0117] In formula 2,

[0118] L is selected from the group consisting of 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, and combinations thereof;

[0119] R1, R2 and R3 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 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 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;

[0120] And the number of carbon atoms contained in formula 2 is greater than or equal to 2;

[0121] Adjacent substituents R1, R2 and R3 can be optionally linked to form a ring;

[0122] “*” indicates the connection position between Formula 2 and Formula 1.

[0123] In this embodiment, “when at least one of X1-X7 is CR x , and the R x "is cyano or fluorine" is intended to indicate that, except for X1, X2 or X3 connected to the metal via G2, and X1, X2 or X3 connected to Y1, at least one of X1-X7 is CR x , and the R x is cyano or fluorine. For example, when X2 is selected from C or N and is connected to the metal through G2; X1 is selected from C and connected to Y1; the other X1-X7 (i.e., X3-X7) are selected from CR x or N, and at least one of them is CR x , and the R x is cyano or fluorine; for example, X7 or X8 is CR x , and the R x It is cyano or fluorine.

[0124] In this context, when G1 is selected from a single bond, it means that Y2 is directly connected to the metal M; when G2 is selected from a single bond, it means that X1, X2 or X3 is directly connected to the metal M.

[0125] In this context, “the adjacent substituent R A "can optionally be linked to form a ring" is intended to mean that when there are multiple R A When any two adjacent substituents R A Obviously, these substituents may not be connected to form a ring.

[0126] Herein, "adjacent substituents R can be optionally connected to form a ring" is intended to mean that when there are multiple Rs, any two adjacent substituents R can be connected to form a ring. Obviously, these substituents may not be connected to form a ring.

[0127] As used herein, “adjacent substituents R′, R x "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, between two substituents R', between two substituents R x Between the substituents R' 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] In this article, "adjacent substituents R1, R2 and R3 can be optionally connected to form a ring" is intended to mean that adjacent substituent groups, for example, between substituents R1 and R2, between substituents R1 and R3, between substituents R3 and R2, 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.

[0129] According to one embodiment of the present invention, G1 and G2 are selected from a single bond or O the same or differently each time they appear.

[0130] According to one embodiment of the present invention, G1 and G2 are single bonds.

[0131] According to one embodiment of the present invention, 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.

[0132] According to one embodiment of the present invention, the metal M is selected from Pt or Ir, the same or different each time it occurs.

[0133] According to one embodiment of the present invention, wherein Cy appears each time and is selected from any of the following structures identically or differently:

[0134]

[0135] Among them, "#" indicates the position connected to G1, Indicates the location connected to X1, X2, or X3.

[0136] In this embodiment, only the structure of Cy is exemplified, and these structures further have the ring A and R substituents shown in Formula 1, which are not shown in this embodiment. The definition of the ring A and R substituents can be found in the above embodiments.

[0137] According to one embodiment of the present invention, L b Each occurrence is identically or differently selected from any one of the following groups:

[0138]

[0139] in,

[0140] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 , CR C1 R C2 ;

[0141] R a and R b Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0142] 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;

[0143] Adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 Can optionally be linked to form a ring.

[0144] 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 connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring. 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.

[0145] According to one embodiment of the present invention, the metal complex has Ir(L a ) m (L b ) 3-m The general structure of the formula 3 is:

[0146]

[0147] in,

[0148] m is selected from 1 or 2; when m is selected from 1, the two L b The same or different; when m is selected from 2, the two L a Same or different;

[0149] Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' are the same or different;

[0150] U1-U8 are selected from CR in the same or different way each time they appear. u or N;

[0151] X3-X7 are selected from CR in the same or different way each time they appear. x or N, and at least one of X3-X7 is CR x , and the R x is cyano or fluorine;

[0152] Y3-Y6 are selected from C, CR or N at each occurrence, the same or different, and one of Y3-Y6 is C and is connected to the ring A;

[0153] R A represents mono-substitution, poly-substitution, or unsubstitution, and when there are multiple Rs, the Rs are the same or different;

[0154] Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof;

[0155] R A , R', R u , R x and R, 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;

[0156] R n is selected from the group consisting of: deuterium, 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 ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, 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;

[0157] Adjacent substituent R A can optionally be linked to form a ring;

[0158] Adjacent substituent R u can optionally be linked to form a ring;

[0159] Adjacent substituents R' and R x Can optionally be linked to form a ring.

[0160] According to one embodiment of the present invention, in Formula 3, R n It has a structure represented by Formula 5:

[0161]

[0162] In formula 5,

[0163] L1 is selected from the group consisting of 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, and combinations thereof;

[0164] R4, R5 and R6 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 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 substituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6-20 carbon atoms, substituted or unsubstituted amino groups having 0-20 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;

[0165] Adjacent substituents R4, R5 and R6 can be optionally linked to form a ring;

[0166] “*” indicates the connection position between Formula 5 and Formula 3.

[0167] According to one embodiment of the present invention, R4, R5 and R6 are 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, cyano, and combinations thereof at each occurrence.

[0168] According to one embodiment of the present invention, R4, R5 and R6 are selected from the group consisting of hydrogen, deuterium, fluorine, 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, cyano, and combinations thereof at each occurrence.

[0169] According to one embodiment of the present invention, R4, R5 and R6 are selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, and combinations thereof, at each occurrence.

[0170] According to one embodiment of the present invention, L1 is selected from the group consisting of: a single bond, a substituted or unsubstituted alkylene group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 6 carbon atoms, a substituted or unsubstituted arylene group having 6 to 14 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 13 carbon atoms, and combinations thereof.

[0171] According to one embodiment of the present invention, L1 is selected from the group consisting of a single bond, a substituted or unsubstituted alkylene group having 1 to 6 carbon atoms, a substituted or unsubstituted arylene group having 6 to 14 carbon atoms, and a combination thereof.

[0172] According to one embodiment of the present invention, wherein, wherein the metal complex has Ir(L a ) m (L b ) 3-m The general structure of the formula 4 is:

[0173]

[0174] in,

[0175] m is selected from 1 or 2; when m is selected from 1, the two L b The same or different; when m is selected from 2, the two L a Same or different;

[0176] Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' are the same or different;

[0177] U1-U8 are selected from CR in the same or different way each time they appear. u or N;

[0178] X3-X7 are selected from CR in the same or different way each time they appear. x or N; and R x selected from the group consisting of hydrogen, deuterium, 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 cycloalkyl 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, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof;

[0179] Y3-Y6 are selected from C, CR or N at each occurrence, the same or different, and one of Y3-Y6 is C and is connected to the ring A;

[0180] R A represents mono-substitution, poly-substitution, or unsubstitution, and when there are multiple Rs, the Rs are the same or different;

[0181] Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof;

[0182] R A , R', R uand R, 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;

[0183] Adjacent substituent R A can optionally be linked to form a ring;

[0184] Adjacent substituent R u can optionally be linked to form a ring;

[0185] Adjacent substituents R' and R x can optionally be linked to form a ring;

[0186] R n It has a structure represented by formula 2:

[0187]

[0188] In formula 2,

[0189] L is selected from the group consisting of 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, and combinations thereof;

[0190] R1, R2 and R3 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 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 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;

[0191] And the number of carbon atoms contained in formula 2 is greater than or equal to 2;

[0192] Adjacent substituents R1, R2 and R3 can be optionally linked to form a ring;

[0193] “*” indicates the connection position of Formula 2 and Formula 4.

[0194] According to one embodiment of the present invention, wherein R1, R2 and R3 are 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, cyano, and combinations thereof each time they appear; and the number of carbon atoms of R1, R2 and R3 is greater than or equal to 1.

[0195] According to one embodiment of the present invention, wherein R1, R2 and R3 are selected from the group consisting of: hydrogen, deuterium, fluorine, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, cyano, and combinations thereof each time they appear; and the number of carbon atoms of R1, R2 and R3 is greater than or equal to 1.

[0196] According to one embodiment of the present invention, R1, R2 and R3 are selected from hydrogen, deuterium, or substituted or unsubstituted alkyl groups having 1-20 carbon atoms, the same or different when they appear each time; and the number of carbon atoms of R1, R2 and R3 is greater than or equal to 1.

[0197] According to one embodiment of the present invention, L is selected from the group consisting of a single bond, a substituted or unsubstituted alkylene group having 1 to 6 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 6 carbon atoms, and a combination thereof.

[0198] According to one embodiment of the present invention, L is selected from the group consisting of a single bond, a substituted or unsubstituted alkylene group having 1 to 6 carbon atoms, and a combination thereof.

[0199] According to one embodiment of the present invention, m is selected from 1 or 2.

[0200] According to one embodiment of the present invention, m is selected from 1.

[0201] According to one embodiment of the present invention, Z is selected from O or S.

[0202] According to one embodiment of the present invention, Z is selected from O.

[0203] According to one embodiment of the present invention, X3-X7 are selected from CR x .

[0204] According to one embodiment of the present invention, X3-X7 are selected from CR x Or N, and at least one of X3-X7 is selected from N, for example, one of X3-X7 is selected from N, or two of X3-X7 are selected from N.

[0205] According to one embodiment of the present invention, each time U1-U8 appears, it is selected from CR u .

[0206] According to one embodiment of the present invention, X3-X7 are selected from CR x Or N, and at least one of X3-X7 is selected from N, for example, one of X3-X7 is selected from N, or two of X3-X7 are selected from N.

[0207] According to one embodiment of the present invention, R x 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 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.

[0208] According to one embodiment of the present invention, R x 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, cyano, and combinations thereof.

[0209] According to one embodiment of the present invention, R x Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, cyano, 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.

[0210] According to one embodiment of the present invention, R u 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 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.

[0211] 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, cyano, and combinations thereof.

[0212] According to one embodiment of the present invention, R uEach occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, cyano, 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.

[0213] According to one embodiment of the present invention, each occurrence of Y3-Y6 is identically or differently selected from CR.

[0214] According to one embodiment of the present invention, R is selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-6 carbon atoms, substituted or unsubstituted cycloalkyl having 3-6 ring carbon atoms, substituted or unsubstituted alkylsilyl having 3-6 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-6 carbon atoms, cyano, and combinations thereof at each occurrence.

[0215] According to one embodiment of the present invention, wherein the R appears each time and is identically or differently selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-6 carbon atoms, substituted or unsubstituted alkylsilyl having 3-6 carbon atoms, and combinations thereof.

[0216] According to one embodiment of the present invention, wherein R appears each time and is selected identically or differently from the group consisting of: hydrogen, deuterium, fluorine, methyl, deuterated methyl, ethyl, deuterated ethyl, n-propyl, deuterated n-propyl, isopropyl, deuterated isopropyl, isobutyl, deuterated isobutyl, tert-butyl, deuterated tert-butyl, and combinations thereof.

[0217] According to one embodiment of the present invention, ring A is an aromatic ring having 6 to 14 carbon atoms, or a heteroaromatic ring having 3 to 13 carbon atoms.

[0218] According to one embodiment of the present invention, wherein ring A appears each time and is selected from a benzene ring, a naphthalene ring, a phenanthrene ring, an anthracene ring, a fluorene ring, a carbazole ring, a dibenzofuran ring, a dibenzothiophene ring, an azadibenzofuran ring, an azafluorene ring, an azadibenzothiophene ring, or a pyridine ring, the same or different.

[0219] According to one embodiment of the present invention, R Aselected 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 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 ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, 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, 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 a combination thereof having 0 to 20 carbon atoms.

[0220] According to one embodiment of the present invention, R A Selected from the group consisting of deuterium, 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.

[0221] According to one embodiment of the present invention, R A Selected from the group consisting of deuterium, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted aryl having 6 to 14 carbon atoms, and combinations thereof.

[0222] According to one embodiment of the present invention, at least one of X4-X7 is selected from CR x , and the R x Selected from cyano or fluorine.

[0223] According to one embodiment of the present invention, at least one of X6 and X7 is selected from CR x , and the R x Selected from cyano or fluorine.

[0224] According to one embodiment of the present invention, X6 is selected from CR x , and the R x Selected from cyano or fluorine.

[0225] According to one embodiment of the present invention, at least one of X4-X7 is selected from CR x , and the R x 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 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 ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, 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, 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 a combination thereof having 0 to 20 carbon atoms.

[0226] According to one embodiment of the present invention, X6 or X7 is selected from CR x , and the R x Selected from the group consisting of deuterium, 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.

[0227] According to one embodiment of the present invention, X7 is selected from CR x , and the R x is selected from deuterium, a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 18 carbon atoms, or a combination thereof.

[0228] According to one embodiment of the present invention, X3-X7 is selected from CR x , and the R x Selected from hydrogen or deuterium.

[0229] According to one embodiment of the present invention, in Formula 3, R n Each occurrence is identically or differently selected from the group consisting of:

[0230]

[0231]

[0232] Optionally, the R n The "*" indicates the connection position with Formula 3, and the R n The hydrogen in the ion can be partially or completely replaced by deuterium.

[0233] According to one embodiment of the present invention, in Formula 4, R n Each occurrence is identically or differently selected from the group consisting of:

[0234]

[0235]

[0236] Optionally, the R n The "*" in formula 4 indicates the connection position, and the R n The hydrogen in the ion can be partially or completely replaced by deuterium.

[0237] According to an embodiment of the present invention, at least one or at least two of U1-U8 are selected from CR u , and the R u is selected from substituted or unsubstituted alkyl groups of 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, or a combination thereof; and all of said R u The sum of the number of carbon atoms is at least 4.

[0238] According to an embodiment of the present invention, at least one or at least two of U1-U4 are selected from CR u , and the R u is selected from substituted or unsubstituted alkyl groups of 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, or a combination thereof, and all of the R u The sum of the number of carbon atoms is at least 4.

[0239] According to one embodiment of the present invention, at least one or at least two of U5-U8 are selected from CR u , and the R u is selected from substituted or unsubstituted alkyl groups of 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, or a combination thereof, and all of the R u The sum of the number of carbon atoms is at least 4.

[0240] According to one embodiment of the present invention, L a Each time it appears, choose the same or different one from L a Each occurrence is selected from La-j-k The group consisting of, wherein j is selected from 1 to 102, k is selected from 1 to 719, said L a The specific structure of the ligand is shown in claim 19.

[0241] According to one embodiment of the present invention, L a Each time it appears, choose the same or different one from L a Each occurrence is selected from L a-j-k The group consisting of, wherein j is selected from 103 to 132, k is selected from 1 to 719, said L a The specific structure of the ligand is shown in claim 20.

[0242] According to one embodiment of the present invention, L b Each time it appears, choose the same or different one from L b1 To L b152 The group consisting of L b1 To L b152 The specific structure is shown in claim 21.

[0243] According to one embodiment of the present invention, L b1 To L b18 , L b20 To L b26 and L b31 To L b152 The hydrogen in the ion can be partially or completely replaced by deuterium.

[0244] According to one embodiment of the present invention, the metal complex has Ir(L a )(L b )2 or Ir(L a )2(L b ) general structure, where L a Each time it appears, choose the same or different one from L a Each occurrence is selected from L a-j-k One or two of the group consisting of, wherein j is selected from 1 to 132, k is selected from 1 to 719; L b Each time it appears, choose the same or different one from L b1 To L b152 One or two of the group.

[0245] According to one embodiment of the present invention, the metal complex is selected from the group consisting of MC-jh each time it appears, either identically or differently; wherein j is selected from 1 to 102, and h is selected from 1 to 2709; the specific structure of the metal complex is shown in claim 22.

[0246] According to one embodiment of the present invention, the metal complex is selected from the group consisting of MC-jh each time it appears, either identically or differently; wherein j is selected from 103 to 132, and h is selected from 1 to 2709; the specific structure of the metal complex is shown in claim 23.

[0247] According to one embodiment of the present invention, an organic electroluminescent device is also disclosed, comprising: an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein at least one of the organic layers comprises the metal complex described in any of the above embodiments.

[0248] According to one embodiment of the present invention, the organic layer containing the metal complex is a light-emitting layer.

[0249] According to one embodiment of the present invention, the light-emitting layer further comprises a first host compound.

[0250] According to one embodiment of the present invention, the light-emitting layer further comprises a first host compound and a second host compound.

[0251] According to one embodiment of the present invention, the first main compound and / or the second main compound contains at least one chemical group selected from the group consisting of: benzene, pyridine, pyrimidine, triazine, carbazole, azacarbazole, indolecarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, azatriphenylene, fluorene, silylate, naphthalene, quinoline, isoquinoline, quinazoline, quinoxaline, phenanthrene, azaphenanthrene, and combinations thereof.

[0252] According to one embodiment of the present invention, the first host compound has a structure represented by formula X-1 or X-2:

[0253]

[0254] in,

[0255] L x is selected, at each occurrence, identically or differently, 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;

[0256] G is selected, identically or differently, from C(R g )2. NR g , O or S;

[0257] Each occurrence of V is selected from C, CR v or N;

[0258] In formula X-1, each occurrence of T is identical or different and is selected from C, CR t or N;

[0259] In formula X-2, each occurrence of T is identically or differently selected from CR t or N;

[0260] R g , R v and R t The alkyl radicals are selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl radicals having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl radicals having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl radicals having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl radicals having 3 to 20 ring atoms, substituted or unsubstituted aralkyl radicals having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy radicals having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy radicals having 6 to 30 carbon atoms, substituted or unsubstituted alkene radicals 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;

[0261] Ar1 is selected, at each occurrence, identically or differently, from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0262] Adjacent substituent R g , R v and R t Can optionally be linked to form a ring.

[0263] In this embodiment, "the adjacent substituent R g , R v and R t "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R v Between the two substituents R t Between the two substituents R g Between, the substituent R v and R t Between, the substituent R v and Rg Between, the substituent R g and R t 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.

[0264] According to one embodiment of the present invention, the first host compound has a structure represented by one of Formula Xa to Formula Xp:

[0265]

[0266] in,

[0267] L x is selected, at each occurrence, identically or differently, 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;

[0268] G is selected, identically or differently, from C(R g )2. NR g , O or S;

[0269] Each time V appears, it is selected from CR in the same or different way. v or N;

[0270] Each occurrence of T is selected from CR t or N;

[0271] R g , R v and R tThe alkyl radicals are selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl radicals having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl radicals having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl radicals having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl radicals having 3 to 20 ring atoms, substituted or unsubstituted aralkyl radicals having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy radicals having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy radicals having 6 to 30 carbon atoms, substituted or unsubstituted alkene radicals 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;

[0272] Ar1 is selected, at each occurrence, identically or differently, from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, or a combination thereof;

[0273] Adjacent substituent R g , R v and R t Can optionally be linked to form a ring.

[0274] According to one embodiment of the present invention, the first host compound is selected from the group consisting of the following compounds:

[0275]

[0276]

[0277]

[0278] According to one embodiment of the present invention, the second host compound has a structure represented by Formula 6:

[0279]

[0280] in,

[0281] Each occurrence of E1-E6 is selected from C, CR e or N, and at least two of E1-E6 are N, and at least one of E1-E6 is C, and they are connected to formula A;

[0282]

[0283] in,

[0284] Q is the same or different each time it appears and is selected from O, S, Se, N, NR Q , CR Q R Q ,SiR Q R Q ,GeR Q R Q and R Q C=CR Q When there are two R Q When two R Q Can be the same or different;

[0285] p is 0 or 1; r is 0 or 1;

[0286] When Q is selected from N, p is 0 and r is 1;

[0287] When Q is selected from O, S, Se, NR Q , CR Q R Q ,SiR Q R Q ,GeR Q R Q and R Q C=CR Q When the group is composed, p is 1 and r is 0;

[0288] L q is selected, at each occurrence, identically or differently, 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;

[0289] Q1-Q8 are selected from C, CR in the same or different manner at each occurrence q or N;

[0290] R e , R Q and R qEach 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;

[0291] “*” represents the connection position between Formula A and Formula 6;

[0292] Adjacent substituent R e , R Q , R q Can optionally be linked to form a ring.

[0293] In this context, “the adjacent substituent R e , R Q , R q "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R e Between the two substituents R Q Between the two substituents R q Between the two substituents R Q and R q 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.

[0294] According to one embodiment of the present invention, the second host compound is selected from the group consisting of the following compounds:

[0295]

[0296]

[0297]

[0298]

[0299]

[0300]

[0301] According to one embodiment of the present invention, the metal complex is doped in the first host compound and the second host compound, and the weight of the metal complex accounts for 1% to 30% of the total weight of the light-emitting layer.

[0302] According to one embodiment of the present invention, the metal complex is doped in the first host compound and the second host compound, and the weight of the metal complex accounts for 3%-13% of the total weight of the light-emitting layer.

[0303] 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:

[0304] According to one embodiment of the present invention, a compound composition is also disclosed, which comprises the metal complex described in any of the aforementioned embodiments.

[0305] Combination with other materials

[0306] 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.

[0307] 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 light-emitting dopants disclosed herein can be used in combination with a variety of 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.

[0308] In the embodiment of material synthesis, unless otherwise stated, all reactions are carried out under nitrogen protection. All reaction solvents are anhydrous and used as they are from commercial sources. The synthetic product uses one or more conventional equipment in the art (including but not limited to Bruker's nuclear magnetic resonance instrument, Shimadzu's liquid chromatograph, liquid chromatography-mass spectrometer, gas chromatography-mass spectrometer, differential scanning calorimeter, Shanghai Lingguang Technology's fluorescence spectrophotometer, Wuhan Cost's electrochemical workstation, Anhui Bei Yi Ke's sublimator, etc.), and the structure is confirmed and the characteristics are tested by methods well known to those skilled in the art. In the embodiment of the device, the characteristics of the device are also tested by methods well known to those skilled in the art using conventional equipment in the art (including but not limited to Angstrom Engineering's evaporation machine, Suzhou Fushida's optical test system, life test system, Beijing Liangtuo's ellipsometer, etc.). Since those skilled in the art are aware of the use of the above-mentioned equipment, test methods and other related contents, it is possible to obtain the inherent data of the sample with certainty and without being affected, so the above-mentioned related contents are no longer expanded in this patent.

[0309] Material Synthesis Example

[0310] Synthesis Example 1: Synthesis of Metal Complex MC-106-2093

[0311]

[0312] In a dry 250mL round-bottom flask, intermediate 1 (2.08g, 2.23mmol), intermediate 2 (1.0g, 2.45mmol), 2-ethoxyethanol (2-Ethoxyethanol, 20mL) and N'N-dimethylformamide (DMF, 20mL) were added in sequence, and the reaction was heated at 100°C for 144h under N2 protection. After the reaction was cooled, it was concentrated under reduced pressure and purified by column chromatography to obtain a yellow solid metal complex MC-106-2093 (1.3g, 1.15mmol, 51% yield). The product was determined to be the target product with a molecular weight of 1132.6.

[0313] Synthesis Example 2: Synthesis of Metal Complex MC-106-1448

[0314]

[0315] In a dry 250mL round-bottom flask, intermediate 4 (1.84g, 2.23mmol), intermediate 5 (1.0g, 2.45mmol), 2-ethoxyethanol (20mL) and N'N-dimethylformamide (20mL) were added in sequence, and the reaction was heated at 100°C for 144h under N2 protection. After the reaction was cooled, it was concentrated under reduced pressure and purified by column chromatography to obtain a yellow solid metal complex MC-106-1448 (1.14g, 1.12mmol, 50% yield). The product was determined to be the target product with a molecular weight of 1020.4.

[0316] Synthesis Example 3: Synthesis of Metal Complex MC-106-287

[0317]

[0318] In a dry 250mL round-bottom flask, intermediate 4 (1.76g, 2.23mmol), intermediate 2 (1.0g, 2.45mmol), 2-ethoxyethanol (20mL) and N'N-dimethylformamide (20mL) were added in sequence, and the reaction was heated at 100°C for 144h under N2 protection. After the reaction was cooled, it was concentrated under reduced pressure and purified by column chromatography to obtain a yellow solid metal complex MC-106-287 (0.8g, 0.83mmol, 37% yield). The product was determined to be the target product with a molecular weight of 964.4.

[0319] Synthesis Example 4:

[0320] Step 1: Synthesis of intermediate 5

[0321]

[0322] 2-Chloro-4-iodopyridine (18.0 g, 75.2 mmol), deuterated phenylboronic acid (9.2 g, 75.2 mmol), tetrakis(triphenylphosphine)palladium (2.6 g, 2.3 mmol) and sodium carbonate (24.0 g, 225.5 mmol) were dissolved in 180 mL tetrahydrofuran and 60 mL aqueous solution, replaced with nitrogen three times and protected with nitrogen, heated and stirred at 100°C overnight. After the reaction was completely cooled, it was extracted with ethyl acetate, washed with saturated brine, dried over anhydrous sodium sulfate, and separated by column chromatography to obtain intermediate 5 (9.0 g, 46.6 mmol, 62% yield).

[0323] Step 2: Synthesis of intermediate 7

[0324]

[0325] In a dry 500mL round-bottom flask, intermediate 6 (3.8g, 12.7mmol), biboronic acid pinacol ester (B2Pin2, 3.4g, 13.4mmol), X-Phos (0.9g, 2.0mmol), palladium acetate (0.2g, 1.0mmol), potassium acetate (2.5g, 25.0mmol) and 100mL of dioxane were added in sequence. After nitrogen replacement three times, the mixture was heated to reflux and stirred under nitrogen protection for 12h. After the reaction was completed, diatomaceous earth and anhydrous magnesium sulfate were filtered, washed twice with ethyl acetate, and the organic phase was collected and concentrated under reduced pressure to obtain intermediate 7, which was directly used in the next step.

[0326] Step 3: Synthesis of intermediate 8

[0327]

[0328] At room temperature and under nitrogen protection, intermediate 7 (3.1 g, 12 mmol) was added to 100 mL of dioxane, and 30 mL of water, intermediate 5 (2.8 g, 14.4 mmol), potassium carbonate (3.3 g, 24 mmol), Pd(dppf)Cl2 (0.4 g, 0.6 mmol) were added and reacted at 110°C overnight. The reaction solution was diluted with water and extracted with DCM, and the crude product was purified by column chromatography (DCM) to obtain white solid intermediate 8 (3.3 g, 7.8 mmol, 65% yield).

[0329] Step 4: Synthesis of metal complex MC-108-287

[0330]

[0331] In a dry 250mL round-bottom flask, intermediate 4 (0.9g, 1.12mmol), intermediate 5 (0.5g, 1.18mmol), 2-ethoxyethanol (15mL) and N'N-dimethylformamide (15mL) were added in sequence, and the reaction was heated at 100°C for 144h under N2 protection. After the reaction was cooled, it was concentrated under reduced pressure and purified by column chromatography to obtain a yellow solid metal complex MC-108-287 (0.55g, 0.56mmol, 50% yield). The product was determined to be the target product with a molecular weight of 978.4.

[0332] Those skilled in the art should be aware that the above preparation method is only an illustrative example, and those skilled in the art can obtain other compound structures of the present invention by improving it.

[0333] Device Embodiment

[0334] Device Example 1

[0335] 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 In the case of 1000 Å / s, the ITO anode is sequentially evaporated by thermal vacuum evaporation at a rate of 0.2-2 Å / s. Compound PD is doped in compound HT as a hole injection layer (HIL). Compound HT is used as a hole transport layer (HTL). Compound PH-23 is used as an electron blocking layer (EBL). Then the metal complex MC-106-2093 of the present invention is doped in compound PH-23 and compound H-40 and co-deposited as a light-emitting layer (EML). On EML, compound HB is used as a hole blocking layer (HBL). On HBL, compound ET and 8-hydroxyquinoline-lithium (Liq) are co-deposited as an electron transport layer (ETL). Finally, 8-hydroxyquinoline-lithium (Liq) with a thickness of 1 nm is evaporated as an electron injection layer, and 120 nm of aluminum is evaporated as a cathode. The device is then transferred back to the glove box and encapsulated with a glass cover and a moisture absorbent to complete the device.

[0336] Device Comparison Example 1

[0337] The implementation of Comparative Device Example 1 is the same as that of Example 1, except that the metal complex MC-106-2093 of the present invention is replaced by Compound GD-1 in the light emitting layer (EML).

[0338] 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.

[0339] Table 1 Device structures of Example 1 and Comparative Example 1

[0340]

[0341] The material structure used in the device is shown below:

[0342]

[0343] The IVL characteristics of the device were measured. 2 The CIE data of the device was measured at a constant current of max ), current efficiency (CE), external quantum efficiency (EQE) and power efficiency (PE), which are recorded and shown in Table 2.

[0344] Table 2 Device data of Example 1 and Comparative Example 1

[0345]

[0346]

[0347] Compared with Comparative Example 1, Example 1 has the same L b In the case of ligands, the only difference is that L a Whether the ligand has R n Substituents. From the data in Table 2, it can be seen that at 10 mA / cm 2 Under constant current, compared with Comparative Example 1, the current efficiency (CE) of Example 1 is 9.7% higher, the external quantum efficiency (EQE) is 3.5% higher, and the power efficiency (PE) is 4.3% higher.

[0348] The above shows that the metal complex provided by the present invention can obtain a device with better performance, compared with the device not containing the L a The metal complex of the ligand, the metal complex provided in the present application can significantly improve the efficiency of the device, and has significant improvements in current efficiency, power efficiency and external quantum efficiency, which can significantly improve the overall performance of the device.

[0349] Device Example 2

[0350] The implementation method of Device Example 2 is the same as that of Device Example 1, except that the metal complex MC-106-1448 of the present invention is used instead of MC-106-2093 in the light emitting layer (EML), and the ratio of compound PH-23:compound H-40:MC-106-1448=56:38:6.

[0351] Device Example 3

[0352] The implementation of Device Example 3 is the same as that of Device Example 2, except that the metal complex MC-106-287 of the present invention is used instead of MC-106-1448 in the light emitting layer (EML).

[0353] Device Example 4

[0354] The implementation of Device Example 4 is the same as that of Device Example 2, except that the metal complex MC-108-287 of the present invention is used instead of MC-106-1448 in the light emitting layer (EML).

[0355] Device Comparison Example 2

[0356] The implementation of Comparative Device Example 2 is the same as that of Example 2, except that Compound HI is used as the hole injection layer (HIL), and Compound GD-2 is used instead of the inventive metal complex MC-106-1448 in the emission layer (EML).

[0357] Device Comparison Example 3

[0358] The implementation of Comparative Device Example 3 is the same as that of Example 2, except that the metal complex MC-106-1448 of the present invention is replaced by compound GD-3 in the light emitting layer (EML).

[0359] 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.

[0360] Table 3 Device structures of Examples 2-4 and Comparative Examples 2-3

[0361]

[0362]

[0363] The new material structure used in the device is shown below:

[0364]

[0365] The IVL characteristics of the device were measured. 2 The CIE data of the device was measured at a constant current of max ), current efficiency (CE), external quantum efficiency (EQE) and power efficiency (PE), which are recorded and shown in Table 2.

[0366] Table 2 Device data of Examples 2-4 and Comparative Examples 2-3

[0367]

[0368]

[0369] Discussion: Compared with Comparative Example 2, Example 2 has the same L b Ligand and R n In the case of Example 2, the ring A substituents shown in the present invention are present. At 15 mA / cm 2 Under constant current, compared with Comparative Example 2, the current efficiency (CE) of Example 2 is 20.2% higher, the external quantum efficiency (EQE) is 22.3% higher, and the power efficiency (PE) is 38.5% higher.

[0370] Compared with Comparative Example 3, Example 2 has the same L b In the case of the ligand, Example 2 has the ring A and R shown in the present invention n Substituent. At 15mA / cm 2 Under constant current, compared with Comparative Example 2, the current efficiency (CE) of Example 2 is 17.3% higher, the external quantum efficiency (EQE) is 21.8% higher, and the power efficiency (PE) is 24.8% higher.

[0371] L of Example 2 to Example 4 a The ligands all have the substituents shown in the present invention, and their current efficiency (CE) reaches 80 cd / m 2 Above, the highest reaches 87.4cd / m 2 The external quantum efficiency (EQE) is close to or exceeds 23%, with the highest reaching 23.81%. The power efficiency (PE) is close to or exceeds 70lm / W, with the highest reaching 77.6lm / W.

[0372] The above embodiments all show that the metal complex provided by the present invention can obtain devices with better performance, compared with those not containing the L a The metal complex provided in this application can significantly improve the efficiency of the device, and has significant improvements in current efficiency, power efficiency and external quantum efficiency, which can significantly improve the overall performance of the device

[0373] 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. A metal complex having M(L a ) m (L b ) n The general structure of The metal M is selected from metals with a relative atomic mass greater than 40; L a It is the first ligand coordinated with the metal M, L b is the second ligand coordinated to the metal M, and L a With L b are different; among them, L a and L b can optionally be linked to form a multidentate ligand; m is selected from 1 or 2, n is selected from 1 or 2, m+n is equal to the oxidation state of metal M; when m is 2, the two L a The same or different; when n is 2, the two L b Same or different; L b is a C^N bidentate ligand, a C^C bidentate ligand or an O^O bidentate ligand; L a Having a structure represented by Formula 1: In formula 1, Cy is selected, at each occurrence, identically or differently, from an aromatic ring containing Y1 and Y2 having 6 to 24 ring atoms, a heteroaromatic ring containing Y1 and Y2 having 5 to 24 ring atoms, or a combination thereof; G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S; X1-X3 are selected from C, CR in the same or different manner at each occurrence x or N; and one of X1-X3 is selected from C and is connected to Y1; When G2 is selected from a single bond, and X1, X2 or X3 is selected from N, the X1, X2 or X3 is connected to the metal through G2 to form a metal-nitrogen bond; or when G2 is selected from a single bond, O or S, and X1, X2 or X3 is selected from C, the X1, X2 or X3 is connected to the metal through G2; X4-X7 are selected from CR in the same or different way each time they appear. x or N; Y1 and Y2 are selected, at each occurrence, identically or differently, from C or N; Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' are the same or different; R and R A Each occurrence is the same or different, indicating mono-substitution, poly-substitution, or no substitution; when there are multiple R, the R is the same or different; when there are multiple R A When the R A Same or different; Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof; R x , R A , R, R' is 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 having 2-20 carbon atoms, -20 carbon atoms, alkynyl, substituted or unsubstituted aryl, substituted or unsubstituted heteroaryl, substituted or unsubstituted alkylsilyl, substituted or unsubstituted alkylgermanyl, substituted or unsubstituted alkylgermanyl, substituted or unsubstituted arylgermanyl, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof; Adjacent substituent R A can optionally be linked to form a ring; Adjacent substituents R can optionally be linked to form a ring; The adjacent substituents R', R x can optionally be linked to form a ring; And any of the following conditions are met: 1) When at least one of X1-X7 is CR x , and the R x When it is cyano or fluorine; Then R n selected from the group consisting of deuterium, 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 having 2-20 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; 2) When R x is selected from hydrogen, deuterium, 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, 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 arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, substituted or unsubstituted arylgermanyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, or a combination thereof; Then R n It has a structure represented by formula 2: In formula 2, L is selected from the group consisting of 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, and combinations thereof; R1, R2 and R3 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 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 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; And the number of carbon atoms contained in formula 2 is greater than or equal to 2; Adjacent substituents R1, R2 and R3 can be optionally linked to form a ring; "*" indicates the connection position between Formula 2 and Formula 1.

2. The metal complex according to claim 1, wherein Each occurrence of Cy is identically or differently selected from any of the following structures: The definition of the R substituent is the same as that of claim 1; Wherein, "#" indicates the position where Cy and G1 are connected, Indicates the location connected to X1, X2, or X3.

3. The metal complex according to claim 1, wherein L b 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 metal complex according to claim 1, wherein The metal M is selected, at each occurrence, identically or differently, from the group consisting of Cu, Ag, Au, Ru, Rh, Pd, Os, Ir and Pt; Preferably, the metal M is chosen, identically or differently on each occurrence, from Pt or Ir.

5. The metal complex according to any one of claims 1 to 4, wherein The metal complex has Ir(L a ) m (L b ) 3-m The general structure of the formula 3 is: in, m is selected from 1 or 2; when m is selected from 1, the two L b The same or different; when m is selected from 2, the two L a Same or different; Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' 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-X7 are selected from CR in the same or different way each time they appear. x or N, and at least one of X3-X7 is CR x , and the R x is cyano or fluorine; Y3-Y6 are selected from C, CR or N at each occurrence, the same or different, and one of Y3-Y6 is C and is connected to the ring A; R A Indicates single substitution, multiple substitution, or no substitution; multiple R A When the R A Same or different; Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof; R A , R', R u , R x and R, 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; R n is selected from the group consisting of: deuterium, 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 ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, 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 can optionally be linked to form a ring; Adjacent substituent R u can optionally be linked to form a ring; Adjacent substituents R' and R x Can optionally be linked to form a ring.

6. The metal complex according to claim 5, wherein R n It has a structure represented by Formula 5: In formula 5, L1 is selected from the group consisting of 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, and combinations thereof; R4, R5 and R6 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 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 substituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6-20 carbon atoms, substituted or unsubstituted amino groups having 0-20 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; Adjacent substituents R4, R5 and R6 can be optionally linked to form a ring; "*" indicates the connection position between Formula 5 and Formula 3.

7. The metal complex according to claim 6, wherein R4, R5 and R6 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 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, cyano, and combinations thereof; Preferably, R4, R5 and R6 are selected from the group consisting of hydrogen, deuterium, fluorine, 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, cyano, and combinations thereof at each occurrence; More preferably, R4, R5 and R6 are identically or differently selected at each occurrence from the group consisting of hydrogen, deuterium, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, and combinations thereof.

8. The metal complex according to any one of claims 1 to 4, wherein The metal complex has Ir(L a ) m (L b ) 3-m The general structure of the formula 4 is: in, m is selected from 1 or 2; when m is selected from 1, the two L b The same or different; when m is selected from 2, the two L a Same or different; Z is selected from the group consisting of O, S, Se, NR', CR'R', SiR'R' and GeR'R'; when two R' exist at the same time, the two R' 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-X7 are selected from CR in the same or different way each time they appear. x or N; and R x selected from the group consisting of hydrogen, deuterium, 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 cycloalkyl 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, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof; Y3-Y6 are selected from C, CR or N at each occurrence, the same or different, and one of Y3-Y6 is C and is connected to the ring A; R A Indicates single substitution, multiple substitution, or no substitution, and there are multiple R A When the R A Same or different; Ring A is selected from an aromatic ring having 6 to 30 carbon atoms, a heteroaromatic ring having 3 to 30 carbon atoms, or a combination thereof; R A , R', R u and R, 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 substituent R A can optionally be linked to form a ring; Adjacent substituent R u can optionally be linked to form a ring; Adjacent substituents R' and R x can optionally be linked to form a ring; R n It has a structure represented by formula 2: In formula 2, L is selected from the group consisting of 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, and combinations thereof; R1, R2 and R3 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 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 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; And the number of carbon atoms contained in formula 2 is greater than or equal to 2; Adjacent substituents R1, R2 and R3 can be optionally linked to form a ring; "*" indicates the connection position between Formula 2 and Formula 4.

9. The metal complex according to claim 8, wherein, R1, R2 and R3 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 aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, cyano, and combinations thereof; and the number of carbon atoms of R1, R2 and R3 is greater than or equal to 1; Preferably, R1, R2 and R3 are selected from the group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, cyano, and combinations thereof at each occurrence; and the number of carbon atoms of R1, R2 and R3 is greater than or equal to 1; More preferably, R1, R2 and R3 are selected from hydrogen, deuterium, or substituted or unsubstituted alkyl having 1 to 20 carbon atoms at each occurrence, the same or different; and the number of carbon atoms of R1, R2 and R3 is greater than or equal to 1.

10. The metal complex according to any one of claims 1 to 9, wherein Z is selected from O or S; preferably, Z is selected from O.

11. The metal complex according to claim 5 or 6, wherein X3-X7 are selected from CR in the same or different way each time they appear. x , and / or U1-U8 are selected from CR in the same or different manner each time they appear u ; R x and R u 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, R x and 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, cyano, and combinations thereof; More preferably, R x and R u Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, cyano, 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.

12. The metal complex according to claim 5 or 6, wherein Y3-Y6 are selected from C or CR at each occurrence, the same or different; and one of Y3-Y6 is C and is connected to the ring A; the R is selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl with 1-6 carbon atoms, substituted or unsubstituted cycloalkyl with 3-6 ring carbon atoms, substituted or unsubstituted alkylsilyl with 3-6 carbon atoms, substituted or unsubstituted alkylgermanyl with 3-6 carbon atoms, cyano, and combinations thereof at each occurrence; Preferably, each occurrence of R is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 6 carbon atoms, and combinations thereof; More preferably, each occurrence of R is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, methyl, deuterated methyl, ethyl, deuterated ethyl, n-propyl, deuterated n-propyl, isopropyl, deuterated isopropyl, isobutyl, deuterated isobutyl, tert-butyl, deuterated tert-butyl, and combinations thereof.

13. The metal complex according to any one of claims 1 to 12, wherein Ring A is an aromatic ring having 6 to 14 carbon atoms, or a heteroaromatic ring having 3 to 13 carbon atoms; Preferably, ring A is selected from a benzene ring, a naphthalene ring, a phenanthrene ring, an anthracene ring, a fluorene ring, a carbazole ring, a dibenzofuran ring, a dibenzothiophene ring, an azadibenzofuran ring, an azafluorene ring, an azadibenzothiophene ring, or a pyridine ring, the same or different each time it occurs.

14. The metal complex according to any one of claims 1 to 7, wherein At least one of X4-X7 is selected from CR x , and the R x is selected from cyano or fluorine; Preferably, at least one of X6 and X7 is selected from CR x , and the R x is selected from cyano or fluorine; More preferably, X6 is selected from CR x , and the R x Selected from cyano or fluorine.

15. The metal complex according to claim 5 or 6, wherein At least one of X4-X7 is selected from CR x , and the R x 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 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 ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, 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; Preferably, X6 or X7 is selected from CR x , and the R x Selected from the group consisting of deuterium, 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; More preferably, X7 is selected from CR x , and the R x is selected from deuterium, a substituted or unsubstituted aryl group having 6 to 18 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 18 carbon atoms, or a combination thereof.

16. The metal complex according to claim 5, wherein R n Each occurrence is identically or differently selected from the group consisting of: Optionally, the R n The "*" in Formula 3 indicates the connection position, and the R n The hydrogen in the ion can be partially or completely replaced by deuterium.

17. The metal complex according to claim 8, wherein R n Each occurrence is identically or differently selected from the group consisting of: Optionally, the R n The "*" in Formula 4 indicates the connection position, and the R n The hydrogen in the ion can be partially or completely replaced by deuterium.

18. The metal complex according to claim 5 or 8, wherein At least one or at least two of U1-U8 are selected from CR u , and the R u is selected from substituted or unsubstituted alkyl groups of 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, or a combination thereof; and all of said R u The sum of the number of carbon atoms is at least 4; Preferably, at least one or at least two of U1-U4 and / or U5-U8 are selected from CR u , and the R u is selected from substituted or unsubstituted alkyl groups of 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3 to 20 ring carbon atoms, or a combination thereof, and all of the R u The sum of the number of carbon atoms is at least 4.

19. The metal complex of claim 1, wherein L a Each occurrence is selected from L a-j-k , wherein j is selected from 1 to 102, k is selected from 1 to 719; wherein, L a-1-k It has the following structure: L a-2-k It has the following structure: L a-3-k It has the following structure: L a-4-k It has the following structure: L a-5-k It has the following structure: L a-6-k It has the following structure: L a-7-k It has the following structure: L a-8-k It has the following structure: L a-9-k It has the following structure: L a-10-k It has the following structure: L a-11-k It has the following structure: L a-12-k It has the following structure: L a-13-k It has the following structure: L a-14-k It has the following structure: L a-15-k It has the following structure: L a-16-k It has the following structure: L a-17-k It has the following structure: L a-18-k It has the following structure: L a-19-k It has the following structure: L a-20-k It has the following structure: L a-21-k It has the following structure: L a-22-k It has the following structure: L a-23-k It has the following structure: L a-24-k It has the following structure: L a-25-k It has the following structure: L a-26-k It has the following structure: L a-27-k It has the following structure: L a-28-k It has the following structure: L a-29-k It has the following structure: L a-30-k It has the following structure: L a-31-k It has the following structure: L a-32-k It has the following structure: L a-33-k It has the following structure: L a-34-k It has the following structure: L a-35-k It has the following structure: L a-36-k It has the following structure: L a-37-k It has the following structure: L a-38-k It has the following structure: L a-39-k It has the following structure: L a-40-k It has the following structure: L a-41-k It has the following structure: L a-42-k It has the following structure: L a-43-k It has the following structure: L a-44-k It has the following structure: L a-45-k It has the following structure: L a-46-k It has the following structure: L a-47-k It has the following structure: L a-48-k It has the following structure: L a-49-k It has the following structure: L a-50-k It has the following structure: L a-51-k It has the following structure: L a-52-k It has the following structure: L a-53-k It has the following structure: L a-54-k It has the following structure: L a-55-k It has the following structure: L a-56-k It has the following structure: L a-57-k It has the following structure: L a-58-k It has the following structure: L a-59-k It has the following structure: L a-60-k It has the following structure: L a-61-k It has the following structure: L a-62-k It has the following structure: L a-63-k It has the following structure: L a-64-k It has the following structure: L a-65-k It has the following structure: L a-66-k It has the following structure: L a-67-k It has the following structure: L a-68-k It has the following structure: L a-69-k It has the following structure: L a-70-k It has the following structure: L a-71-k It has the following structure: L a-72-k It has the following structure: L a-73-k It has the following structure: L a-74-k It has the following structure: L a-75-k It has the following structure: L a-76-k It has the following structure: L a-77-k It has the following structure: L a-78-k It has the following structure: L a-79-k It has the following structure: L a-80-k It has the following structure: L a-81-k It has the following structure: L a-82-k It has the following structure: L a-83-k It has the following structure: L a-84-k It has the following structure: L a-85-k It has the following structure: L a-86-k It has the following structure: L a-87-k It has the following structure: L a-88-k It has the following structure: L a-89-k It has the following structure: L a-90-k It has the following structure: L a-91-k It has the following structure: L a-92-k It has the following structure: L a-93-k It has the following structure: L a-94-k It has the following structure: L a-95-k It has the following structure: L a-96-k It has the following structure: L a-97-k It has the following structure: L a-98-k It has the following structure: L a-99-k It has the following structure: L a-100-k It has the following structure: L a-101-k It has the following structure: L a-102-k It has the following structure: where k, R x4 , R x5 , R x6 , R y3 , R y4 , R y5 , and R Ar Details are as follows: The above P1-P74 are as follows: The "*" in P1-P74 indicates that a Optionally, the ligand L a The hydrogen in the ion can be partially or completely replaced by deuterium.

20. The metal complex of claim 1, wherein L a Each occurrence is selected from L a-j-k , wherein j is selected from 103 to 132, and k is selected from 1 to 719; wherein, L a-103-k It has the following structure: L a-104-k It has the following structure: L a-105-k It has the following structure: L a-106-k It has the following structure: L a-107-k It has the following structure: L a-108-k It has the following structure: L a-109-k It has the following structure: L a-110-k It has the following structure: L a-111-k It has the following structure: L a-112-k It has the following structure: L a-113-k It has the following structure: L a-114-k It has the following structure: L a-115-k It has the following structure: L a-116-k It has the following structure: L a-117-k It has the following structure: L a-118-k It has the following structure: L a-119-k It has the following structure: L a-120-k It has the following structure: L a-121-k It has the following structure: L a-122-k It has the following structure: L a-123-k It has the following structure: L a-124-k It has the following structure: L a-125-k It has the following structure: L a-126-k It has the following structure: L a-127-k It has the following structure: L a-128-k It has the following structure: L a-129-k It has the following structure: L a-130-k It has the following structure: L a-131-k It has the following structure: L a-132-k It has the following structure: where k, R x4 , R x5 , R x6 , R y3 , R y4 , R y5 , and R Ar Details are as follows: The above P1-P74 are as follows: The "*" in P1-P74 indicates that a Optionally, the ligand L a The hydrogen in the ion can be partially or completely replaced by deuterium.

21. The metal complex according to claim 19 or 20, wherein L b Each time it appears, choose the same or different one from L b1 To L b151 Groups composed of: Optionally, the above L b1 To L b18 , L b20 To L b26 and L b31 To L b152 The hydrogen in the ion can be partially or completely replaced by deuterium.

22. The metal complex according to claim 21, wherein The metal complex is selected from the group consisting of MC-jh, j is selected from 1 to 102, h is selected from 1 to 2709, and MC-jh has Ir(L a-j-k )(L b )2 structure, MC-jh and Ir(L a-j-k )(L b ) j in 2 has the same value; where h, k and L b They correspond to the structures in the following table:

23. The metal complex according to claim 21, wherein The metal complex is selected from the group consisting of MC-jh, j is selected from 103 to 132, h is selected from 1 to 2709, and MC-jh has Ir(L a-j-k )(L b )2 structure, MC-jh and Ir(L a-j-k )(L b ) j in 2 has the same value; where h, k and L b They correspond to the structures in the following table:

24. An organic electroluminescent device, comprising: anode, cathode, and an organic layer arranged between the anode and the cathode, wherein at least one of the organic layers comprises the metal complex according to any one of claims 1 to 23.

25. The organic electroluminescent device according to claim 24, wherein: The organic layer including the metal complex is a light-emitting layer.

26. The organic electroluminescent device according to claim 25, wherein: The light-emitting layer further comprises a first host compound, or further comprises a first host compound and a second host compound; Preferably, the first host compound and / or the second host compound comprises at least one chemical group selected from the group consisting of benzene, pyridine, pyrimidine, triazine, carbazole, azacarbazole, indolecarbazole, dibenzothiophene, azadibenzothiophene, dibenzofuran, azadibenzofuran, dibenzoselenophene, triphenylene, azatriphenylene, fluorene, silafluorene, naphthalene, quinoline, isoquinoline, quinazoline, quinoxaline, phenanthrene, azaphenanthrene, and combinations thereof.

27. The organic electroluminescent device according to claim 25, wherein: The metal complex is doped in the first host compound and the second host compound, and the weight of the metal complex accounts for 1% to 30% of the total weight of the light-emitting layer; Preferably, the weight of the metal complex accounts for 3% to 13% of the total weight of the light-emitting layer.

28. A compound composition comprising the metal complex according to any one of claims 1 to 23.

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