Organic electroluminescent material and device thereof

Abstract

The present invention relates to compounds for organic electronic devices, such as organic light emitting devices. The present invention relates to a metal complex and, more particularly, to a metal complex comprising a La ligand having a structure of formula 1, which can provide better device performance, obtain dark green emission wavelength, and facilitate obtaining wider color gamut display. The invention also discloses an electroluminescent device containing the metal complex, a compound combination and a display assembly. The electroluminescent devices, compound combinations or display assemblies contain the metal complex, and have good application prospects.

Description

Technical Field

[0001] The present invention relates to compounds for use in organic electronic devices, such as organic light-emitting devices. More particularly, it relates to a compound comprising L having a structure of Formula 1 a The invention relates to a metal complex of a ligand, and an electroluminescent device, a compound combination and a display component 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 fabrication on flexible substrates.

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

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

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

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

[0008] US20160211469A1 discloses a An organic light-emitting material having a general structure; and further discloses R 4 The specific structure of the substituents such as hydrogen, methyl, isopropyl, cyclopentyl, etc., in which R 4 The benzylic carbon atoms at the position are all primary and secondary carbon atoms, and R 4 The benzylic position is a quaternary carbon atom, and R is not taught 4 The influence of the position benzyl position on complexes and devices when it is a quaternary carbon atom.

[0009] The present invention provides a method comprising L having a structure of Formula 1 a The metal complexes of the ligands can be used as charge transport materials, luminescent materials, and host materials in electroluminescent devices. These novel metal complexes can provide better device performance. Summary of the invention

[0010] The present invention aims to provide a method comprising L having a structure of Formula 1 a Metal complexes with ligands are used to solve at least some of the above problems. The metal complexes can be used as luminescent materials (or luminescent dopants) in organic electroluminescent devices. These new metal complexes can provide better device performance.

[0011] According to one embodiment of the present invention, a metal complex is disclosed, which has M(L a ) m (L b ) n (L c ) q The general formula of

[0012] Among them, L a , L b and L c are the first, second and third ligands coordinated to the metal M, and L c and the L a or L b are the same or different; where L a , L b and L c can optionally be linked to form a multidentate ligand;

[0013] The metal M is selected from metals with a relative atomic mass greater than 40;

[0014] m is 1 or 2, n is 1 or 2, q is 0 or 1, m+n+q equals the oxidation state of M; when m is 2, the two L a are the same or different; when n is 2, the two L b are the same or different;

[0015] L aHaving a structure represented by Formula 1:

[0016]

[0017] In Formula 1, G1 and G2 are selected from a single bond, O or S at each occurrence, the same or different;

[0018] Cy is selected, at each occurrence, identically or differently, from an aromatic ring containing Y1 and Y2 having 6 to 24 ring atoms, a substituted or unsubstituted heteroaromatic ring containing Y1 and Y2 having 5 to 24 ring atoms, or a combination thereof;

[0019] Y1 and Y2 are selected from C or N at each occurrence, the same or different, and Y2 is connected to the metal through G1;

[0020] X1-X7 are selected from C, CR in the same or different manner at each occurrence x or N, and at least one of X1-X3 is selected from C and is connected to Y1 through a single bond, and another of the adjacent X1-X3 is selected from C or N and is connected to the metal through G2;

[0021] At least one of X1-X7 is selected from N;

[0022] Z is selected from the group consisting of O, S, Se, NR', CR'R' and SiR'R'; when two R' are present at the same time, the two R' are the same or different;

[0023] Each occurrence of R is the same or different, indicating monosubstitution, polysubstitution, or no substitution. When there are multiple Rs, the Rs are the same or different.

[0024] R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted an alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 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;

[0025] R x , R' is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkyl 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;

[0026] R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0-20 carbon atoms, and combinations thereof;

[0027] Adjacent substituent R x , R 1 , R 2 , R 3 can optionally be linked to form a ring;

[0028] L b , L c Each occurrence is identically or differently selected from any one of the following groups:

[0029]

[0030]

[0031] in,

[0032] R a , R b and R c Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0033] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 , CR C1 R C2 ;

[0034] R a , R b , R c , R N1 , R C1 and R C2 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;

[0035] Adjacent substituent R a , R b , R c , RN1 , R C1 and R C2 Can optionally be linked to form a ring.

[0036] According to another embodiment of the present invention, application of the metal complex in an electroluminescent device is also disclosed.

[0037] According to another embodiment of the present invention, an electroluminescent device is also disclosed, which includes an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer includes L having a structure of Formula 1 as described in the above embodiment. a Ligand metal complexes.

[0038] According to another embodiment of the present invention, a compound combination is also disclosed, which comprises L having a structure of Formula 1 as described in the above embodiment: a Ligand metal complexes.

[0039] According to another embodiment of the present invention, a display component is also disclosed, which includes the L having the structure of Formula 1 described in the above embodiment. a The metal complex of the ligand or the electroluminescent device described in the above embodiments.

[0040] The novel metal complex disclosed in the present invention can be used as a luminescent material in an electroluminescent device. These novel metal complexes can provide better device performance; these metal complexes have deep green luminescence, can effectively achieve more saturated luminescence, and realize a means of effectively regulating the luminescent color, thereby better improving the comprehensive performance of the electroluminescent device. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a schematic diagram of an organic light-emitting device that may contain the compounds and compound combinations disclosed herein.

[0042] Figure 2 is a schematic diagram of another organic light-emitting device that may contain the compounds and compound combinations disclosed herein. DETAILED DESCRIPTION

[0043] OLEDs can be manufactured on a variety of substrates, such as glass, plastic, and metal. Figure 1An 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.

[0044] 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.

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] The materials and structures described herein may also be used in other organic electronic devices listed above.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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).

[0054] 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.

[0055] 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).

[0056] Definition of Substituent Terms

[0057] Halogen or halide - as used herein includes fluorine, chlorine, bromine and iodine.

[0058] Alkyl - as used herein, includes straight chain and branched alkyl groups. The alkyl group may be an alkyl group having 1 to 20 carbon atoms, preferably an alkyl group having 1 to 12 carbon atoms, and more preferably an alkyl group having 1 to 6 carbon atoms. Examples of alkyl groups include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, 3-methylpentyl. Among the above, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl and n-hexyl are preferred. In addition, the alkyl group may be optionally substituted.

[0059] 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.

[0060] 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.

[0061] 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.

[0062] 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.

[0063] Aryl or aromatic group - As used herein, both non-fused and fused systems are contemplated. The aryl group may be an aryl group having 6 to 30 carbon atoms, preferably an aryl group having 6 to 20 carbon atoms, and more preferably an aryl group having 6 to 12 carbon atoms. Examples of aryl groups include phenyl, biphenyl, terphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenanthrene, fluorene, pyrene, Perylene and azulene, preferably phenyl, biphenyl, terphenyl, triphenylene, fluorene and naphthalene. Examples of non-condensed aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-terphenyl-2-yl, m-terphenyl-4-yl, m-terphenyl-3-yl, m-terphenyl-2-yl, o-tolyl, m-tolyl, p-tolyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenyl, 4"-tert-butyl-p-terphenyl-4-yl, o-cumyl, m-cumyl, p-cumyl, 2,3-xylyl, 3,4-xylyl, 2,5-xylyl, mesityl and m-quadrenyl. In addition, the aryl group may be optionally substituted.

[0064] Heterocyclic or heterocyclic - as used herein, non-aromatic cyclic groups are contemplated. Non-aromatic heterocyclic groups include saturated heterocyclic groups having 3-20 ring atoms and unsaturated non-aromatic heterocyclic groups having 3-20 ring atoms, wherein at least one ring atom is selected from the group consisting of nitrogen atoms, oxygen atoms, sulfur atoms, selenium atoms, silicon atoms, phosphorus atoms, germanium atoms and boron atoms, and preferred non-aromatic heterocyclic groups are those having 3 to 7 ring atoms, including at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxirane, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, dioxopentanyl, dioxanyl, aziridinyl, dihydropyrrolyl, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxepinyl, thiepinyl, azepine and tetrahydrothioxolyl. Additionally, the heterocyclyl group may be optionally substituted.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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,

[0069] Alkylsilyl - As used herein, alkyl substituted silicon groups are contemplated. The alkylsilyl group may be an alkylsilyl group having 3-20 carbon atoms, preferably an alkylsilyl group having 3 to 10 carbon atoms. Examples of alkylsilyl groups include trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyltert-butylsilyl, methyldi-tert-butylsilyl. In addition, the alkylsilyl group may be optionally substituted.

[0070] Arylsilyl - as used herein, encompasses at least one aryl-substituted silicon group. The arylsilyl group may be an arylsilyl group having 6 to 30 carbon atoms, preferably an arylsilyl group having 8 to 20 carbon atoms. Examples of arylsilyl groups include triphenylsilyl, phenyldiphenylsilyl, diphenylbiphenylsilyl, phenyldiethylsilyl, diphenylethylsilyl, phenyldimethylsilyl, diphenylmethylsilyl, phenyldiisopropylsilyl, diphenylisopropylsilyl, diphenylbutylsilyl, diphenylisobutylsilyl, diphenyltert-butylsilyl. In addition, the arylsilyl group may be optionally substituted.

[0071] Alkylgermanyl - As used herein, alkyl substituted germanyl is contemplated. The alkylgermanyl may be an alkylgermanyl having 3-20 carbon atoms, preferably an alkylgermanyl having 3 to 10 carbon atoms. Examples of alkylgermanyl include trimethylgermanyl, triethylgermanyl, methyldiethylgermanyl, ethyldimethylgermanyl, tripropylgermanyl, tributylgermanyl, triisopropylgermanyl, methyldiisopropylgermanyl, dimethylisopropylgermanyl, tri-tert-butylgermanyl, triisobutylgermanyl, dimethyltert-butylgermanyl, methyldi-tert-butylgermanyl. In addition, the alkylgermanyl may be optionally substituted.

[0072] Arylgermanyl - as used herein, encompasses germanyl substituted with at least one aryl or heteroaryl group. The arylgermanyl may be an arylgermanyl having 6 to 30 carbon atoms, preferably an arylgermanyl having 8 to 20 carbon atoms. Examples of arylgermanyl include triphenylgermanyl, phenyldibiphenylgermanyl, diphenylbiphenylgermanyl, phenyldiethylgermanyl, diphenylethylgermanyl, phenyldimethylgermanyl, diphenylmethylgermanyl, phenyldiisopropylgermanyl, diphenylisopropylgermanyl, diphenylbutylgermanyl, diphenylisobutylgermanyl, diphenyltert-butylgermanyl. In addition, the arylgermanyl may be optionally substituted.

[0073] The term "aza" in azadibenzofuran, azadibenzothiophene, etc. means that one or more CH groups in the corresponding aromatic fragment are replaced by a nitrogen atom. For example, azatriphenylene includes dibenzo[f,h]quinoxaline, dibenzo[f,h]quinoline and other analogs having two or more nitrogens in the ring system. Other nitrogen analogs of the above-mentioned aza derivatives can be easily thought of by those of ordinary skill in the art, and all such analogs are determined to be included in the terms described herein.

[0074] In the present disclosure, unless otherwise defined, when any one of the terms in the group consisting of substituted alkyl, substituted cycloalkyl, substituted heteroalkyl, substituted heterocyclyl, substituted aralkyl, substituted alkoxy, substituted aryloxy, substituted alkenyl, substituted alkynyl, substituted aryl, substituted heteroaryl, substituted alkylsilyl, substituted arylsilyl, substituted alkylgermanyl, substituted arylgermanyl, substituted amino, substituted acyl, substituted carbonyl, substituted carboxylic acid, Substituted ester groups, substituted sulfinyl groups, substituted sulfonyl groups, substituted phosphino groups refer to any one of alkyl groups, cycloalkyl groups, heteroalkyl groups, heterocyclic groups, aralkyl groups, alkoxy groups, aryloxy groups, alkenyl groups, alkynyl groups, aryl groups, heteroaryl groups, alkylsilyl groups, arylsilyl groups, alkylgermanyl groups, arylgermanyl groups, amino groups, acyl groups, carbonyl groups, carboxyl groups, ester groups, sulfinyl groups, sulfonyl groups and phosphino groups, which may be substituted by one or more of deuterium, halogen groups, unsubstituted alkyl groups having 1 to 20 carbon atoms, unsubstituted alkyl groups having 1 to 20 carbon atoms, Cycloalkyl having 3-20 ring carbon atoms, unsubstituted heteroalkyl having 1-20 carbon atoms, unsubstituted heterocyclyl having 3-20 ring atoms, unsubstituted aralkyl having 7-30 carbon atoms, unsubstituted alkoxy having 1-20 carbon atoms, unsubstituted aryloxy having 6-30 carbon atoms, unsubstituted alkenyl having 2-20 carbon atoms, unsubstituted alkynyl having 2-20 carbon atoms, unsubstituted aryl having 6-30 carbon atoms , unsubstituted heteroaryl having 3 to 30 carbon atoms, unsubstituted alkylsilyl having 3 to 20 carbon atoms, unsubstituted arylsilyl having 6 to 20 carbon atoms, unsubstituted alkylgermanyl having 3 to 20 carbon atoms, unsubstituted arylgermanyl having 6 to 20 carbon atoms, unsubstituted amino having 0 to 20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino and combinations thereof.

[0075] 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.

[0076] 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.

[0077] In the compounds mentioned in the present disclosure, polysubstitution refers to the range including disubstitution up to the maximum number of available substitutions. When a substituent in the compounds mentioned in the present disclosure represents polysubstitution (including disubstitution, trisubstitution, tetrasubstitution, etc.), it means that the substituent can exist in multiple available substitution positions on its connection structure, and the substituent existing in multiple available substitution positions can be the same structure or different structures.

[0078] 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.

[0079] 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:

[0080]

[0081] 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:

[0082]

[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 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:

[0084]

[0085] 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:

[0086]

[0087] According to one embodiment of the present invention, a metal complex is disclosed, which has M(L a ) m (L b ) n (L c ) q The general formula is: a , L b and L c are the first, second and third ligands coordinated to the metal M, and L c and the L a or L b are the same or different; where L a , L b and L c can optionally be linked to form a multidentate ligand;

[0088] The metal M is selected from metals with a relative atomic mass greater than 40;

[0089] m is 1 or 2, n is 1 or 2, q is 0 or 1, m+n+q equals the oxidation state of M; when m is 2, the two L a are the same or different; when n is 2, the two L b are the same or different;

[0090] L a Having a structure represented by Formula 1:

[0091]

[0092] In Formula 1, G1 and G2 are selected from a single bond, O or S at each occurrence, the same or different;

[0093] Cy is selected, at each occurrence, identically or differently, from an aromatic ring containing Y1 and Y2 having 6 to 24 ring atoms, a substituted or unsubstituted heteroaromatic ring containing Y1 and Y2 having 5 to 24 ring atoms, or a combination thereof;

[0094] Y1 and Y2 are selected from C or N at each occurrence, the same or different, and Y2 is connected to the metal through G1;

[0095] X1-X7 are selected from C, CR in the same or different manner at each occurrence xor N, and at least one of X1-X3 is selected from C and is connected to Y1 through a single bond, and another of the adjacent X1-X3 is selected from C or N and is connected to the metal through G2;

[0096] At least one of X1-X7 is selected from N;

[0097] Z is selected from the group consisting of O, S, Se, NR', CR'R' and SiR'R'; when two R' are present at the same time, the two R' are the same or different;

[0098] Each occurrence of R is the same or different, indicating monosubstitution, polysubstitution, or no substitution. When there are multiple Rs, the Rs are the same or different;

[0099] R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted an alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 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;

[0100] R x, R' is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkyl 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;

[0101] R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0-20 carbon atoms, and combinations thereof;

[0102] Adjacent substituent R x , R 1 , R 2 , R 3 can optionally be linked to form a ring;

[0103] Lb , L c Each occurrence is identically or differently selected from any one of the following groups:

[0104]

[0105] in,

[0106] R a , R b and R c Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0107] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 , CR C1 R C2 ;

[0108] R a , R b , R c , R N1 , R C1 and R C2 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;

[0109] Adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 Can optionally be linked to form a ring.

[0110] In this context, “the adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 can be optionally connected to form a ring”, is intended to mean that the substituent R a and R a Between, the substituent R b and R b Between, the substituent R c and R c Between, the substituent R C1 and R C2 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 a and R C1 Between, the substituent R a and R C2 Between, the substituent R b and R N1 Between, the substituent R b and R C1 Between, the substituent R b and R C2 They may be connected to form a ring. Obviously, these substituents may not be connected to form a ring.

[0111] 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.

[0112] In this context, “the adjacent substituent R x , R 1 , R 2 and R 3 "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, substituents R x and R x Between, the substituent R 1 and R 2 Between, the substituent R 2 and R 3 Between, the substituent R1 and R 3 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.

[0113] According to one embodiment of the present invention, wherein Cy appears each time and is identically or differently selected from any structure in the group consisting of:

[0114]

[0115] Wherein, each occurrence of R is the same or different and represents mono-substitution, poly-substitution, or no substitution; when there are multiple R in any structure, the R are the same or different;

[0116] R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3-20 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;

[0117] Adjacent substituents R can optionally be linked to form a ring;

[0118] Wherein, “#” indicates the position connected to the metal M. It indicates the bonding position of Cy and one of X1-X3.

[0119] Herein, "adjacent substituents R can be optionally connected to form a ring" is intended to mean that adjacent substituent groups, for example, any one or more of these substituent groups between substituents R and R, can be connected to form a ring. Obviously, these substituents may not be connected to form a ring.

[0120] According to one embodiment of the present invention, L a Each occurrence has the same or different structure represented by any one of Formulae 1-1 to 1-11:

[0121]

[0122] in,

[0123] 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 selected from N;

[0124] Z is selected from the group consisting of O, S, Se, NR', CR'R' and SiR'R'; when two R' are present at the same time, the two R' are the same or different;

[0125] Each occurrence of R is the same or different, indicating monosubstitution, polysubstitution, or no substitution. When there are multiple Rs, the Rs are the same or different;

[0126] R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted cycloalkyl 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 alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0127] R x, R' is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkyl 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;

[0128] R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0-20 carbon atoms, and combinations thereof;

[0129] Adjacent substituent R 1 , R 2 , R 3 Can optionally be linked to form a ring.

[0130] According to one embodiment of the present invention, Z is selected from O, S or Se.

[0131] According to one embodiment of the present invention, Z is selected from O or S.

[0132] According to one embodiment of the present invention, wherein Z is selected from O;

[0133] 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, either the same or different; preferably, the metal M is selected from Pt or Ir each time it appears, either the same or different.

[0134] According to one embodiment of the present invention, R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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 arylsilyl having 6 to 20 carbon atoms, cyano, isocyano, and combinations thereof; the adjacent substituent R 1 , R 2 , R 3 Can optionally be linked to form a ring.

[0135] According to one embodiment of the present invention, R 1 , R 2 , R 3 is selected, on each occurrence, identically or differently, from 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 20 carbon atoms, and substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms.

[0136] According to one embodiment of the present invention, R 1 , R 2 , R 3Each occurrence is identically or differently selected from the group consisting of: 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.

[0137] According to one embodiment of the present invention, the metal complex has the general formula of Ir(L a ) m (L b ) n The metal complex has

[0138] The structure represented by formula 2:

[0139]

[0140] In formula 2,

[0141] m is 1 or 2, n = 3-m; when m is 2, two L a are the same or different; when m is 1, the two L b are the same or different;

[0142] U1-U8 are selected from CR in the same or different way each time they appear. ux or N;

[0143] 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 selected from N;

[0144] Each occurrence of Y3-Y6 is identical or different and is selected from CR y or N;

[0145] R yEach 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 cycloalkyl having 1 to 20 carbon atoms, Alkoxy, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof having 0 to 20 carbon atoms;

[0146] R ux , R x 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;

[0147] Adjacent substituent R ux , R x , R y can optionally be linked to form a ring;

[0148] R 1 , R 2 , R 3each occurrence is selected identically or differently from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0 to 20 carbon atoms, and combinations thereof;

[0149] Adjacent substituent R 1 , R 2 , R 3 Can optionally be linked to form a ring.

[0150] 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; preferably, X7 is selected from N.

[0151] 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, and at least one is selected from CR x , the R xeach occurrence is identically or differently selected from the group consisting of: 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 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, cyano, isocyano, hydroxyl, thiol, sulfinyl, sulfonyl, phosphino, and combinations thereof.

[0152] According to one embodiment of the present invention, X7 is selected from N, and at least one of X3-X6 is selected from CR x , the R x Each occurrence is identically or differently selected from the group consisting of 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, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, cyano, and combinations thereof.

[0153] According to one embodiment of the present invention, X7 is selected from N, X6 is selected from CR x , the R x Each occurrence is identically or differently selected from the group consisting of 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, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, cyano, and combinations thereof.

[0154] According to one embodiment of the present invention, X7 is selected from N, X6 is selected from CR x , the R xEach occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 10 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 10 ring carbon atoms, substituted or unsubstituted aryl having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms, cyano, and combinations thereof.

[0155] According to one embodiment of the present invention, R 1 , R 2 , R 3 Each occurrence is identically or differently selected from the group consisting of substituted or unsubstituted alkyl having 1 to 10 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 12 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof;

[0156] Adjacent substituent R 1 , R 2 , R 3 Can optionally be linked to form a ring.

[0157] According to one embodiment of the present invention, R 1 , R 2 , R 3 Each occurrence is identically or differently selected from the group consisting of substituted or unsubstituted alkyl having 1 to 10 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 12 ring carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof.

[0158] According to one embodiment of the present invention, each occurrence of Y3-Y6 is selected from CR y Or N, and at least one of Y3-Y6 is selected from N.

[0159] According to one embodiment of the present invention, each occurrence of Y3-Y6 is selected from CR y or N, and at least one or two of Y3-Y6 are selected from CR y , the R yEach occurrence is identically or differently 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 alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, thiol, sulfinyl, sulfonyl, phosphino, and combinations thereof. According to one embodiment of the present invention, each occurrence of Y3-Y6 is selected from CR y or N, and at least two of Y3-Y6 are selected from CR y , the R y Each occurrence is identically or differently 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 alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, thiol, sulfinyl, sulfonyl, phosphino, and combinations thereof.

[0160] According to one embodiment of the present invention, at least two of Y3-Y6 are selected from CR y , the R y Each occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, and combinations thereof.

[0161] According to one embodiment of the present invention, Y4 and / or Y5 are selected from CR y , the R y Each occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, and combinations thereof.

[0162] According to an embodiment of the present invention, at least one or at least two of U1-U8 are selected from CR ux , and the R ux The group is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a combination thereof.

[0163] According to an embodiment of the present invention, at least one or at least two of U1-U8 are selected from CR ux , and the R ux 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 ux The sum of the number of carbon atoms is at least 4.

[0164] According to an embodiment of the present invention, at least one or at least two of U1-U4 and / or U5-U8 are selected from CR ux , and the R ux 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 ux The sum of the number of carbon atoms is at least 4.

[0165] According to one embodiment of the present invention, L a Each occurrence is selected identically or differently from L a-1-1 To L a-1-371 , L a-2-1 To L a-2-307 A group consisting of a-1-1 To L a-1-371 , L a-2-1 To L a-2-307 The structure is shown in claim 12.

[0166] According to one embodiment of the present invention, L b Each time it appears, choose the same or different one from L b1 -L b169 The group consisting of: b1 -L b169 The structure is shown in claim 13.

[0167] According to another embodiment of the present invention, the metal complex has Ir(L a )(L b )2 structure, two L b Same; La is selected from L a-1-1 To L a-1-371 , La-2-1 To L a-2-307 The group composed of the group, L b Selected from L b1 -L b169 Composed of groups.

[0168] According to another embodiment of the present invention, the metal complex is selected from the group consisting of Metal Complex 1 to Metal Complex 1084, and the Metal Complex 1 to Metal Complex 1084 are as described in claim 14.

[0169] According to another embodiment of the present invention, the metal complexes 1 to 1022 and the metal complexes 1041 to 1084 may be partially or fully deuterated.

[0170] According to another embodiment of the present invention, application of the metal complex in an electroluminescent device is also disclosed.

[0171] According to another embodiment of the present invention, an electroluminescent device is also disclosed, which includes an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer includes L having a structure of Formula 1 as described in the above embodiment. a Ligand metal complexes.

[0172] According to another embodiment of the present invention, the organic layer is a light-emitting layer, and the metal complex is a light-emitting material.

[0173] According to another embodiment of the present invention, the light-emitting layer emits green light or white light.

[0174] According to an embodiment of the present invention, the organic layer further includes a host material.

[0175] According to another embodiment of the present invention, wherein the light-emitting layer comprises a first host compound;

[0176] According to another embodiment of the present invention, the light-emitting layer further comprises a second host compound;

[0177] According to another 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.

[0178] According to another embodiment of the present invention, the first host compound has a structure represented by Formula 4:

[0179]

[0180] in,

[0181] 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 is connected to formula A;

[0182]

[0183] in,

[0184] Q is the same or different each time it appears and is selected from the group consisting of O, S, Se, N, NR", CR"R", SiR"R", GeR"R" and R"C=CR"; when two R" are present at the same time, the two R" can be the same or different;

[0185] p is 0 or 1; r is 0 or 1;

[0186] When Q is selected from N, p is 0 and r is 1;

[0187] When Q is selected from the group consisting of O, S, Se, NR", CR"R", SiR"R", GeR"R" and R"C=CR", p is 1 and r is 0;

[0188] L is identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof;

[0189] Q1-Q8 are selected from C, CR in the same or different manner at each occurrence q or N;

[0190] R e , R' 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;

[0191] “*” represents the connection position between Formula A and Formula 4;

[0192] Adjacent substituent R e , R”, R q Can optionally be linked to form a ring.

[0193] In this context, “the adjacent substituent R e , R”, 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 two substituents R", between two substituents R q Between the two substituents R" 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.

[0194] According to another embodiment of the present invention, each occurrence of E1-E6 is identically or differently selected from C, CR e or N, and three of E1-E6 are N, and at least one of E1-E6 is CR e , and the R e Each occurrence is identically or differently selected from the group consisting of substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof;

[0195] and / or Q is selected, identically or differently, at each occurrence, from O, S, N or NR";

[0196] and / or at least one or at least two of Q1-Q8 are selected from CR q , and the R q is selected from a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 5 to 30 carbon atoms, or a combination thereof;

[0197] and / or L is identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof.

[0198] According to another embodiment of the present invention, the first host compound is selected from the group consisting of H-1 to H-163, and the structures of H-1 to H-163 are shown below:

[0199]

[0200]

[0201]

[0202]

[0203]

[0204]

[0205]

[0206]

[0207] The hydrogen in the above compounds H-1 to H-163 can be partially or completely replaced by deuterium.

[0208] According to another embodiment of the present invention, the second host compound has a structure represented by Formula 5 or Formula 6:

[0209]

[0210] in,

[0211] 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;

[0212] G is selected, identically or differently, from C(R g )2. NR g , O or S;

[0213] Each occurrence of V is selected from C, CR v or N, and at least one of V is C, and L x connect;

[0214] Each occurrence of U is selected from C, CR, or u or N, and at least one of U is C, and L x connect;

[0215] R g , R v 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 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;

[0216] Ar6 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;

[0217] Adjacent substituent R g , R v and R u Can optionally be linked to form a ring.

[0218] According to another embodiment of the present invention, wherein the second host compound has a structure represented by one of Formula 5-a to Formula 5-p:

[0219]

[0220]

[0221] in,

[0222] 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;

[0223] G is selected, identically or differently, from C(R g )2. NR g , O or S;

[0224] Each occurrence of V is selected from C, CR v or N, and at least one of V is C, and L x connect;

[0225] Each occurrence of U is selected from C, CR, or u or N, and at least one of U is C, and L x connect;

[0226] R g , R v 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 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;

[0227] Ar6 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;

[0228] Adjacent substituent R g , R v and R u Can optionally be linked to form a ring.

[0229] As used herein, “adjacent substituents R g , R v and R u "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R g Between the two substituents R v Between the two substituents R u Between, the substituent R v and R u Between, the substituent R v and R g Between, the substituent R g and R u 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.

[0230] According to another embodiment of the present invention, the second host compound is selected from the group consisting of PH-1 to PH-115, and the structures of PH-1 to PH-115 are shown as follows:

[0231]

[0232]

[0233]

[0234]

[0235]

[0236]

[0237]

[0238] The hydrogen in the above compounds PH-1 to PH-115 can be partially or completely replaced by deuterium.

[0239] 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:

[0240]

[0241] According to another embodiment of the present invention, in the light-emitting layer, 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.

[0242] According to another embodiment of the present invention, the weight of the metal complex accounts for 3%-13% of the total weight of the light-emitting layer.

[0243] According to another embodiment of the present invention, a compound combination is also disclosed, which comprises L having a structure of Formula 1 as described in the above embodiment: a Ligand metal complexes.

[0244] According to another embodiment of the present invention, a display component is also disclosed, which includes the L having the structure of Formula 1 described in the above embodiment. a The metal complex of the ligand or the electroluminescent device described in the above embodiments.

[0245] Combination with other materials

[0246] 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.

[0247] The materials described herein as specific layers that can be used in organic light-emitting devices can be used in combination with a variety of other materials present in the device. For example, the compounds disclosed herein can be used in combination with a variety of luminescent dopants, hosts, transport layers, barrier layers, injection layers, electrodes, and other layers that may be present. The combination of these materials is described in detail in paragraphs 0080-0101 of U.S. Patent Application US2015 / 0349273A1, the entire contents of which are incorporated herein by reference. The materials described or mentioned therein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can easily consult the literature to identify other materials that can be used in combination.

[0248] 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.

[0249] The focus of the present invention is the structure of the metal complex itself. The synthesis method of the metal complex is not the focus of the present invention. Those skilled in the art can select appropriate raw materials and processes according to the synthesis target. For example, the metal complex of the present invention can be synthesized according to the following route:

[0250]

[0251] When synthesizing the metal complex of the present invention, those skilled in the art may also refer to the prior art or the synthesis methods described in prior applications such as US20160211469A1, US20240109926A1, CN2023107948945, etc.; or those skilled in the art may design a synthesis route by reverse synthesis (retrosynthesis) to effectively synthesize the metal complex of the present invention.

[0252] The metal complexes of the present invention were subjected to DFT calculations [calculation method: using Gaussian 16 program, B3LYP functional, cep-31g basis set for calculation], and the HOMO value, LUMO value, Eg (difference between HOMO value and LUMO value), and T1 value (triplet state) of the relevant compounds were obtained, as shown in Table 1 below:

[0253] Table 1 DFT calculation results

[0254]

[0255]

[0256] According to the above data, the metal complex 302 and the metal complex 669 of the present invention have lower T1 values ​​and higher Eg values ​​than the comparison compound 1, indicating that the technical solution of the present invention has bluer luminescence; it can be seen from the metal complexes 302 and 669 of the present invention that a deep green luminescence wavelength can be obtained by adopting the technical solution of the present invention, which is beneficial for a wider color gamut display and has broad application prospects in electroluminescent devices.

[0257] 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 (L c ) q The general formula is, where L a , L b and L c are the first, second and third ligands coordinated to the metal M, and L c and the L a or L b are the same or different; where L a , L b and L c can optionally be linked to form a multidentate ligand; The metal M is selected from metals with a relative atomic mass greater than 40; m is 1 or 2, n is 1 or 2, q is 0 or 1, and m+n+q equals the oxidation state of M; when m is 2, the two La are the same or different; when n is 2, the two Lb are the same or different; La has a structure represented by Formula 1: In Formula 1, G1 and G2 are selected from a single bond, O or S at each occurrence, the same or different; Cy is selected, at each occurrence, identically or differently, from an aromatic ring containing Y1 and Y2 having 6 to 24 ring atoms, a substituted or unsubstituted heteroaromatic ring containing Y1 and Y2 having 5 to 24 ring atoms, or a combination thereof; Y1 and Y2 are selected from C or N at each occurrence, the same or different, and Y2 is connected to the metal through G1; X1-X7 are selected from C, CR in the same or different manner at each occurrence x or N, and at least one of X1-X3 is selected from C and is connected to Y1 through a single bond, and another of the adjacent X1-X3 is selected from C or N and is connected to the metal through G2; At least one of X1-X7 is selected from N; Z is selected from the group consisting of O, S, Se, NR', CR'R' and SiR'R'; when two R' are present at the same time, the two R' are the same or different; Each occurrence of R is the same or different, indicating monosubstitution, polysubstitution, or no substitution. When there are multiple Rs, the Rs are the same or different. R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted an alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 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 x , R' is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkyl 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; R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0-20 carbon atoms, and combinations thereof; Adjacent substituent R x , R 1 , R 2 , R 3 can optionally be linked to form a ring; L b , L c Each occurrence is identically or differently selected from any one of the following groups: Among them, R a , R b and R c Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted; 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 , R b , R c , R N1 , R C1 and R C2 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; Adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 Can optionally be linked to form a ring.

2. The metal complex according to claim 1, wherein Each occurrence of Cy is identically or differently selected from any structure in the group consisting of: Wherein, each occurrence of R is the same or different and represents mono-substitution, poly-substitution, or no substitution; when there are multiple R in any structure, the R are the same or different; R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3-20 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 R can optionally be linked to form a ring; Wherein, "#" indicates the position connected to the metal M, It indicates the bonding position of Cy and one of X1-X3.

3. The metal complex according to claim 1, wherein L a Each occurrence has the same or different structure represented by any one of Formulae 1-1 to 1-11: in, 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 selected from N; Z is selected from the group consisting of O, S, Se, NR', CR'R' and SiR'R'; when two R' are present at the same time, the two R' are the same or different; Each occurrence of R is the same or different, indicating monosubstitution, polysubstitution, or no substitution. When there are multiple Rs, the Rs are the same or different; R is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted cycloalkyl 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 alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof; R x , R' is selected, at each occurrence, identically or differently, from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkyl 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; R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0-20 carbon atoms, and combinations thereof; Adjacent substituent R x , R 1 , R 2 , R 3 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 selected, at each occurrence, identically or differently, from Pt or Ir.

5. The metal complex according to claim 1, wherein The general formula of the metal complex is Ir(L a ) m (L b ) n , the metal complex has a structure represented by Formula 2: In formula 2, m is 1 or 2, n = 3-m; when m is 2, two L a are the same or different; when m is 1, the two L b are the same or different; U1-U8 are selected from CR in the same or different way each time they appear. ux 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 selected from N; Each occurrence of Y3-Y6 is identical or different and is selected from CR y or N; R y 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 substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3-20 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; R ux , R x 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; Adjacent substituent R ux , R x , R y can optionally be linked to form a ring; R 1 , R 2 , R 3 each occurrence is selected identically or differently from the group consisting of 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 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 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, acyl groups, carbonyl groups, carboxylic acid groups, ester groups, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups having 0 to 20 carbon atoms, and combinations thereof; Adjacent substituent R 1 , R 2 , R 3 Can optionally be linked to form a ring.

6. The metal complex according to claim 1 or 5, wherein Z is selected from O, S or Se; preferably, Z is selected from O or S; more preferably, Z is selected from O.

7. The metal complex according to claim 1 or 5, wherein R 1 , R 2 , R 3 each occurrence is identically or differently selected from the group consisting of 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 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 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 arylsilyl having 6 to 20 carbon atoms, cyano, isocyano, and combinations thereof; the adjacent substituent R 1 , R 2 , R 3 can optionally be linked to form a ring; Preferably, wherein R 1 , R 2 , R 3 is selected, at each occurrence, identically or differently, from 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; the adjacent substituent R 1 , R 2 , R 3 can optionally be linked to form a ring; More preferably, wherein R 1 , R 2 , R 3 Each occurrence is identically or differently selected from the group consisting of substituted or unsubstituted alkyl having 1 to 10 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 12 ring carbon atoms, substituted or unsubstituted aryl having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms, and combinations thereof; More preferably, wherein R 1 , R 2 , R 3 Each occurrence is identically or differently selected from the group consisting of: 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.

8. The metal complex according to claim 1 or 5, wherein 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 selected from N, and at least one is selected from CR x , The R x each occurrence is identically or differently selected from the group consisting of: 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 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, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof; Preferably, X7 is selected from N, and at least one of X3-X6 is selected from CR x , the R x each occurrence is identically or differently selected from the group consisting of 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, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 20 carbon atoms, cyano, and combinations thereof; More preferably, wherein X7 is selected from N, X6 is selected from CR x , the R x each occurrence is identically or differently selected from the group consisting of: 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, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, cyano, and combinations thereof; More preferably, wherein X7 is selected from N, X3-X6 is selected from CR x , the R x Each occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 10 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 10 ring carbon atoms, substituted or unsubstituted aryl having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms, cyano, and combinations thereof.

9. The metal complex according to claim 1 or 5, wherein Each occurrence of Y3-Y6 is identical or different and is selected from CR y Or N, and at least one of Y3-Y6 is selected from N.

10. The metal complex according to claim 1 or 5, wherein Each occurrence of Y3-Y6 is identical or different and is selected from CR y or N, and at least one or two of Y3-Y6 are selected from CR y ; The R y each occurrence is identically or differently 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 alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof; Preferably, Y4 and / or Y5 are selected from CR y , the R y Each occurrence is identically or differently selected from the group consisting of deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, and combinations thereof.

11. The metal complex according to claim 1 or 5, wherein At least one or at least two of U1-U8 are selected from CR ux , and the R ux is selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, or a combination thereof; Preferably, at least one or at least two of U1-U8 are selected from CR ux , and the R ux 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 ux 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 ux , and the R ux 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 ux The sum of the number of carbon atoms is at least 4.

12. The metal complex according to claim 1, wherein L a Each occurrence is selected from L a-1-1 To L a-1-371 , L a-2-1 To L a-2-307 The group consisting of: a-1-i Has the following structure The L a-1-1 To L a-1-371 The details are shown in the following table: Among them, L a-2-j Has the following structure The L a-2-1 To L a-2-307 The details are shown in the following table: Among them, P1-P46 are as follows: In the P1-P46, "*" indicates the connection position with La; optionally, the ligand L a-1-1 To L a-1-371 and L a-2-1 To L a-2-307 The hydrogen in the ion can be partially or completely replaced by deuterium.

13. The metal complex according to claim 12, wherein L b Each time it appears, choose the same or different one from L b1 -L b169 The group consisting of: b1 -L b169 The structure is as follows: 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.

14. The metal complex according to claim 13, wherein The metal complex has Ir(L a )(L b )2 structure, two L b Same; La is selected from L a-1-1 To L a-1-371 , L a-2-1 To L a-2-307 The group composed of the group, L b Selected from L b1 -L b169 The group composed of; Preferably, the metal complex is selected from the group consisting of metal complex 1 to metal complex 1084; wherein the metal complex 1 to metal complex 1022 are as follows: The metal complexes 1023 to 1084 have the following structures: The hydrogen in the metal complexes 1 to 1022 and the metal complexes 1041 to 1084 may be partially or completely deuterated.

15. An electroluminescent device comprising an anode, a cathode, and an organic layer disposed between the anode and the cathode, wherein the organic layer comprises L having a structure of formula 1 according to any one of claims 1 to 14 a Ligand metal complexes.

16. The electroluminescent device according to claim 15, wherein the organic layer is a light-emitting layer, and the metal complex is a light-emitting material; Preferably, the light-emitting layer emits green light or white light; More preferably, the organic layer further comprises a host material.

17. The electroluminescent device according to claim 16, wherein the light-emitting layer comprises a first host compound; Preferably, the light-emitting layer further comprises a second host compound; More 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.

18. The electroluminescent device according to claim 17, wherein in the light-emitting layer, 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%-13% of the total weight of the light-emitting layer.

19. A compound combination comprising the metal complex according to any one of claims 1 to 14.

20. A display component comprising the metal complex according to any one of claims 1 to 14 or the electroluminescent device according to any one of claims 15 to 18.

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