Organic electroluminescent devices

Abstract

The present invention discloses an electroluminescent device. More particularly, it relates to an organic electroluminescent device, which comprises a first organic layer, wherein the first organic layer comprises a first compound having a structure of Formula 1 and a second compound having a structure of Formula 2, wherein the first compound is a P-type conductive doping material, and the second compound is a hole transport material. By using the hole transport material with a specific structure disclosed in the present invention and the P-type conductive doping material in combination, the obtained OLED device has lower voltage, longer life, etc., and has better comprehensive device performance.

Description

Technical Field

[0001] The present invention relates to an electroluminescent device, more particularly, the electroluminescent device comprises a first compound having a structure of Formula 1 and a second compound having a structure of Formula 2, and a compound combination and a display component comprising the first compound and the second compound. 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 luminous color of OLED can be achieved by the structural design of luminescent materials. 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 rapid decrease in efficiency of phosphorescent OLEDs under high brightness conditions is still a problem. In addition, it is expected to have a more saturated luminescent spectrum, higher efficiency and longer device life. Due to the advantages of low cost, low power consumption, high brightness, wide viewing angle and thin thickness, OLED has been widely used in the field of display and lighting after decades of development. With the development of the OLED industry, lower voltage, higher efficiency and longer life have also become the goals constantly pursued by people in the field. At present, the structure of commercial OLED devices usually includes: cathode, anode, and a series of organic functional layers arranged between the cathode and anode, such as: hole injection layer (HIL), hole transport layer (HTL), light-emitting layer (EML), hole blocking layer (HBL), electron transport layer (ETL) and electron injection layer (EIL). Among them, HIL is usually composed of hole transport material (HTM) doped with a low proportion of P-type conductive doping material (also known as P-type doping material, PD, P-dopant, P-dopant material, etc.), and its doping ratio is generally between 1% and 3%. HTL is usually composed of HTM used in HIL. In order to obtain devices with better comprehensive performance, common improvement methods include: developing new device structures or developing new compounds with better performance. In addition, the combination of different materials in the organic layer also has an important influence on the performance of the device. The combination of materials with better matching performance can balance the carriers in the device and is more conducive to the transfer of charges. Therefore, it is also crucial to pay attention to the matching and interaction between organic materials and develop new material combinations that can be applied to specific organic functional layers.

[0008] With the continuous accumulation and optimization of OLED materials and devices, the industry's demand for device performance has further increased. Different P-type conductive doping materials and different hole transport materials will produce different hole injection effects. The matching degree between the two is particularly important. The higher the matching degree, the better the interface injection effect. In order to obtain better hole injection effects and bring device performance to a higher level, on the one hand, it is very important to research and develop better P-type conductive doping materials and / or better hole transport materials; on the other hand, screening suitable combinations of hole transport materials and P-type conductive doping materials is also an important way to develop new hole injection layers.

[0009] The applicant disclosed an organic compound in the previous US patent application US20200062778A1, which includes the following compound;

[0010] In this patent application, the compound is used as a P-type conductive doping material in an organic electroluminescent device, but the patent does not limit the hole transport material used in combination, nor does it teach the technical effect when used in combination with the hole transport material of the specific structure of the present invention.

[0011] The present invention discloses an electroluminescent device comprising a material combination of a first compound and a second compound having a specific structure. The obtained OLED device has a lower voltage and a longer device life than a conventional device, which is beneficial to improving the comprehensive performance of the device. Summary of the invention

[0012] The present invention aims to provide an electroluminescent device, which comprises a first organic layer, wherein the first organic layer comprises a first compound having a structure of Formula 1 and a second compound having a structure of Formula 2, wherein the first compound is a P-type conductive doping material, and the second compound is a hole transport material. By using the hole transport material and the P-type conductive doping material of the specific structure disclosed in the present invention, the obtained OLED device has lower voltage, longer life, etc., and has better comprehensive device performance.

[0013] According to one embodiment of the present invention, an electroluminescent device is disclosed, comprising:

[0014] Anode, cathode,

[0015] and a first organic layer disposed between the anode and the cathode; the first organic layer comprising a first compound and a second compound;

[0016] The first compound has a structure represented by Formula 1;

[0017]

[0018] Among them, in formula 1,

[0019] X and Y are selected, at each occurrence, identically or differently, from NR', CR"R"', O, S or Se;

[0020] Z1 and Z2 are each identically or differently selected from O, S or Se;

[0021] R, R', R" and R'" are each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted 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 cycloalkyl having 1-20 carbon atoms, atom, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, and combinations thereof;

[0022] Adjacent substituents R, R', R" and R'" in Formula 1 can be optionally linked to form a ring;

[0023] The second compound has a structure represented by Formula 2;

[0024]

[0025] Among them, in formula 2,

[0026] W is selected from CR in the same or different way at each occurrence w or N;

[0027] L1 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 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0028] Each occurrence of Z3 is identical or different and is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1, BR1 and PR1; when two R1s are present at the same time, the two R1s are identical or different;

[0029] Ar1 is the same or different each time it occurs and is selected 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;

[0030] R1, R wThe group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0031] Adjacent substituents R1, R w Can optionally be linked to form a ring.

[0032] The present invention provides an electroluminescent device, wherein the electroluminescent device comprises at least a first organic layer, wherein the first organic layer comprises a first compound and a second compound, wherein the first organic layer can be used as a hole injection layer, the first compound can be used as a P-type conductive doping material, and the second compound can be used as a hole transport material. By using the specific combination of the first compound and the second compound of the specific structure disclosed in the present invention, the obtained OLED device can reduce the voltage and increase the lifespan compared with conventional devices, which is conducive to improving the overall performance of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of an organic light-emitting device that may contain the compounds and compound combinations disclosed herein.

[0034] Figure 2 is a schematic diagram of another organic light-emitting device that may contain the compounds and compound combinations disclosed herein. DETAILED DESCRIPTION

[0035] 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.

[0036] 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.

[0037] 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.

[0038] 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.

[0039] 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.

[0040] 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.

[0041] The materials and structures described herein may also be used in other organic electronic devices listed above.

[0042] 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.

[0043] 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.

[0044] 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.

[0045] 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).

[0046] 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.

[0047] 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).

[0048] Definition of Substituent Terms

[0049] Halogen or halide - as used herein includes fluorine, chlorine, bromine and iodine.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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.

[0055] 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.

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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,

[0061] 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.

[0062] 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.

[0063] 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.

[0064] 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.

[0065] 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.

[0066] 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.

[0067] 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.

[0068] 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.

[0069] 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.

[0070] 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.

[0071] 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:

[0072]

[0073] 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:

[0074]

[0075] 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:

[0076]

[0077] 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:

[0078]

[0079] According to one embodiment of the present invention, an electroluminescent device is disclosed, comprising:

[0080] Anode, cathode,

[0081] and a first organic layer disposed between the anode and the cathode; the first organic layer comprising a first compound and a second compound;

[0082] The first compound has a structure represented by Formula 1;

[0083]

[0084] Among them, in formula 1,

[0085] X and Y are selected, at each occurrence, identically or differently, from NR', CR"R"', O, S or Se;

[0086] Z1 and Z2 are each identically or differently selected from O, S or Se;

[0087] R, R', R" and R'" are each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted 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 cycloalkyl having 1-20 carbon atoms, atom, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, and combinations thereof;

[0088] Adjacent substituents R, R', R" and R'" in Formula 1 can be optionally linked to form a ring;

[0089] The second compound has a structure represented by Formula 2;

[0090]

[0091] Among them, in formula 2,

[0092] W is selected from CR in the same or different way at each occurrence w or N;

[0093] L1 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 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0094] Each occurrence of Z3 is identical or different and is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1, BR1 and PR1; when two R1s are present at the same time, the two R1s are identical or different;

[0095] Ar1 is the same or different each time it occurs and is selected 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;

[0096] R1, R w The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0097] Adjacent substituents R1, R w Can optionally be linked to form a ring.

[0098] Herein, "adjacent substituents R, R', R" and R"' can be optionally connected to form a ring" is intended to mean that adjacent substituent groups, for example, between two substituents R, between two substituents R', between two substituents R", between two substituents R"', between substituents R" and R"', any one or more of these substituent groups can be connected to form a ring. Obviously, these substituents may not be connected to form a ring.

[0099] Herein, "adjacent substituents R1, R w "can be optionally connected to form a ring" is intended to mean that adjacent groups of substituents, for example, between two substituents R1, between two substituents R w 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.

[0100] According to one embodiment of the present invention, at least one of R, R', R" and R'" is a group having at least one electron-withdrawing group, wherein the electron-withdrawing group is selected from the group consisting of halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphino, azaaromatic ring group, and halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphino, azaaromatic ring group One or more substituted groups of any of the following: alkyl groups having 1-20 carbon atoms, cycloalkyl groups having 3-20 ring carbon atoms, heteroalkyl groups having 1-20 carbon atoms, aralkyl groups having 7-30 carbon atoms, alkoxy groups having 1-20 carbon atoms, aryloxy groups having 6-30 carbon atoms, alkenyl groups having 2-20 carbon atoms, alkynyl groups having 2-20 carbon atoms, aryl groups having 6-30 carbon atoms, heteroaryl groups having 3-30 carbon atoms, alkylsilyl groups having 3-20 carbon atoms, arylsilyl groups having 6-20 carbon atoms, and combinations thereof.

[0101] According to one embodiment of the present invention, the electron-withdrawing group is selected from the group consisting of: F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, pyrimidine, triazine, and combinations thereof.

[0102] According to one embodiment of the present invention, each occurrence of X and Y is identically or differently selected from the group consisting of the following structures:

[0103] O, S, Se,

[0104] Preferably, wherein X and Y are

[0105] Wherein "*" indicates the position where the X and Y groups are connected to the dehydrobenzodioxazole ring, dehydrobenzodithiazole ring or dehydrobenzodiselenazole ring in Formula 1.

[0106] According to one embodiment of the present invention, wherein, wherein, each time R occurs, it is selected from the group consisting of hydrogen, deuterium, methyl, isopropyl, NO2, SO2CH3, SCF3, C2F5, OC2F5, OCH3, diphenylmethylsilyl, phenyl, methoxyphenyl, p-methylphenyl, 2,6-diisopropylphenyl, biphenyl, polyfluorophenyl, difluoropyridyl, nitrophenyl, dimethylthiazolyl, vinyl substituted by one or more of CN or CF3, vinyl substituted by CN or A substituted ethynyl group in CF3, a dimethylphosphinoyl group, a diphenylphosphinoyl group, F, CF3, OCF3, SF5, SO2CF3, a cyano group, an isocyano group, SCN, OCN, a trifluoromethylphenyl group, a trifluoromethoxyphenyl group, a bis(trifluoromethyl)phenyl group, a bis(trifluoromethoxy)phenyl group, a 4-cyanotetrafluorophenyl group, a phenyl group or a biphenyl group substituted with one or more of F, CN or CF3, a tetrafluoropyridyl group, a pyrimidinyl group, a triazine group, a diphenylboryl group, an oxaboranthenyl group, and combinations thereof.

[0107] According to one embodiment of the present invention, wherein, each occurrence of R is identically or differently selected from the group consisting of the following structures:

[0108]

[0109]

[0110] Preferably, in a compound represented by Formula 1, two R are the same;

[0111] in, It represents the position where the R group is connected to the dehydrobenzodioxazole ring, dehydrobenzodithiazole ring or dehydrobenzodiselenazole ring in Formula 1.

[0112] According to one embodiment of the present invention, the first compound is selected from the group consisting of Compound 1 to Compound 182; the structures of Compound 1 to Compound 182 are as described in claim 7.

[0113] According to another embodiment of the present invention, W is selected from CR in the same or different manner each time it appears. w , the R wEach 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 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, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof.

[0114] According to another embodiment of the present invention, R w Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted aryl having 6-20 carbon atoms, substituted or unsubstituted heteroaryl having 3-20 carbon atoms, cyano, and combinations thereof.

[0115] According to another embodiment of the present invention, R w The group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, cyano, and combinations thereof is selected at each occurrence, the same or different.

[0116] According to another embodiment of the present invention, each occurrence of Z3 is identically or differently selected from O, S, Se, CR1R1 or NR1.

[0117] According to another embodiment of the present invention, each occurrence of Z3 is identically or differently selected from NR1.

[0118] According to another embodiment of the present invention, the second compound has a structure represented by Formula 2-1:

[0119]

[0120] Among them, in formula 2-1,

[0121] W is selected from CR in the same or different way at each occurrence w or N;

[0122] L1 and L2 are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof;

[0123] Ar1 and Ar2 are the same or different each time and are selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or a combination thereof;

[0124] R w The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0125] Adjacent substituent R w Can optionally be linked to form a ring.

[0126] As used herein, “adjacent substituents R w "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R w 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.

[0127] According to another embodiment of the present invention, Ar1 and Ar2 are identically or differently selected from substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms, or combinations thereof.

[0128] According to another embodiment of the present invention, Ar1 and Ar2 are selected from the following group each time they appear, the same or different: substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted phenanthryl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, and combinations thereof.

[0129] According to another embodiment of the present invention, wherein L1 and L2 are identically or differently selected from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof each time they appear.

[0130] According to another embodiment of the present invention, L1 and L2 are identically or differently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted pyridylene, or a combination thereof each time they appear.

[0131] According to another embodiment of the present invention, L1 and L2 are identically or differently selected from a single bond or a phenylene group each time they appear.

[0132] According to one embodiment of the present invention, the first compound is a first organic material. According to another embodiment of the present invention, the first organic material is selected from the group consisting of compound B-1 to compound B-165, and the structures of compound B-1 to compound B-165 are as shown in claim 12.

[0133] According to another embodiment of the present invention, at least one hydrogen in the first organic material is replaced by deuterium.

[0134] According to an embodiment of the present invention, the first organic layer is a hole injection layer, and the first organic material is a P-type conductive doping material.

[0135] According to an embodiment of the present invention, the second compound is a second organic material.

[0136] According to an embodiment of the present invention, the first organic layer is a hole injection layer, and the second organic material is a hole transport material.

[0137] According to an embodiment of the present invention, the electroluminescent device further comprises a second organic layer, and the second organic layer is arranged between the first organic layer and the cathode; preferably, the second organic layer is in direct contact with the first organic layer.

[0138] According to one embodiment of the present invention, the second organic layer comprises a third compound, the third compound is a third organic material, and the third organic material is the same as or different from the second organic material; preferably, the third organic material is the same as the second organic material.

[0139] According to an embodiment of the present invention, the second organic layer is a hole transport layer, and the third organic material is a hole transport material.

[0140] According to an embodiment of the present invention, the thickness of the first organic layer is 5-20 nm.

[0141] According to an embodiment of the present invention, the thickness of the first organic layer is 10-15 nm.

[0142] According to an embodiment of the present invention, the doping weight ratio of the P-type conductive doping material accounts for 0.5%-10.0% of the first organic layer.

[0143] According to an embodiment of the present invention, the doping weight ratio of the P-type conductive doping material accounts for 1.5%-3.0% of the first organic layer.

[0144] According to another embodiment of the present invention, a composition is also disclosed, which comprises the first compound having the structure of Formula 1 and the second compound having the structure of Formula 2 described in the above embodiment.

[0145] According to another embodiment of the present invention, the electroluminescent device further comprises a third organic layer, wherein the third organic layer comprises at least a first metal complex; wherein the first metal complex comprises a metal M and a ligand L coordinated with the metal M. a , the L a Having a structure represented by Formula 1:

[0146]

[0147] In formula 3,

[0148] The metal M is selected from metals with a relative atomic mass greater than 40;

[0149] Cy is selected, at each occurrence, identically or differently, from substituted or unsubstituted aryl having 5 to 24 ring atoms, or substituted or unsubstituted heteroaryl having 5 to 24 ring atoms, or a combination thereof;

[0150] G1 and G2 are identically or differently selected at each occurrence from a single bond, O or S;

[0151] The Cy is connected to the metal M via G1;

[0152] X1-X4 are selected from C, CR in the same or different manner at each occurrence x or N; and at least one of X1-X4 is selected from C and connected to Cy; and at least one of X1-X4 is selected from C or N and connected to the metal M through G2;

[0153] X5-X8 are selected from CR in the same or different way each time they appear. x or N;

[0154] X is selected from the group consisting of O, S, Se, NR2, CR2R2, SiR2R2 and GeR2R2 at each occurrence; when two R2 are present at the same time, the two R2 are the same or different;

[0155] R x and R2, at each occurrence, is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0156] The adjacent substituents R2, R x Can optionally be linked to form a ring.

[0157] In this context, “adjacent substituents R2 and R x "can be optionally connected to form a ring" is intended to mean that adjacent groups of substituents, for example, between two substituents R2, between two substituents Rx Between the substituents R2 and R x Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0158] According to one embodiment of the present invention, in the first metal complex, Cy appears each time and is selected from any structure in the group consisting of the following:

[0159]

[0160] in,

[0161] R y Each occurrence of the same or different means mono-, poly- or no-substitution;

[0162] R y The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0163] Adjacent substituent R y can optionally be linked to form a ring;

[0164] Preferably, Cy is

[0165] Wherein, “#” indicates the position connected to the metal M through G1;

[0166] It represents the position where Cy is connected to one of X1, X2, X3 or X4 in Formula 1.

[0167] According to one embodiment of the present invention, the first metal complex, wherein X1-X8 each time appears, is selected from C or CR x .

[0168] According to one embodiment of the present invention, the electroluminescent device, wherein the ligand L a Having a structure represented by Formula 3a:

[0169]

[0170] in,

[0171] Each occurrence of Z is identical or different and is selected from the group consisting of O, S, Se, NR2, CR2R2, SiR2R2 and GeR2R2; when two R2 are present at the same time, the two R2 are identical or different;

[0172] Each occurrence of X1-X8 is selected from C, CR x or N;

[0173] Each occurrence of Y1-Y4 is the same or different selection from CR y or N; R x , R y and R2, at each occurrence, is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted 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 alkenyl groups 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;

[0174] Adjacent substituent R x , R2, R y Can optionally be linked to form a ring.

[0175] In this context, “the adjacent substituent R x , R2, R y "can be optionally connected to form a ring" is intended to mean that adjacent groups of substituents, for example, between two substituents R2, between two substituents R x Between the substituents R2 and R x Between the two substituents R y Between, the substituent R y and R x Any one or more of these substituent groups may be connected to form a ring. Obviously, none of these substituent groups may be connected to form a ring.

[0176] According to one embodiment of the present invention, the metal complex, wherein the metal complex has M(L a ) m (L b ) n (L c ) q The general formula of

[0177] 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;

[0178] m is selected from 1, 2 or 3, n is selected from 0, 1 or 2, q is selected from 0, 1 or 2, m+n+q is equal to the oxidation state of metal M; when m is greater than or equal to 2, multiple L a The same or different; when n is equal to 2, the two L b The same or different; when q is equal to 2, the two L c Same or different;

[0179] L b and L c Each occurrence is identically or differently selected from any one of the following groups:

[0180]

[0181] in,

[0182] X b Each occurrence is identically or differently selected from the group consisting of: O, S, Se, NR N1 , CRC1 R C2 ;

[0183] R a and R b Each occurrence is identical or different and indicates mono-, poly-, or unsubstituted;

[0184] R a , R b , R c , R N1 , R C1 and R C2 The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0185] Adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 Can optionally be linked to form a ring.

[0186] In this context, “the adjacent substituent R a , R b , R c , R N1 , R C1 and R C2 "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, two substituents R a Between the two substituents R b Between, the substituent R a and Rb Between, the substituent R a and R c Between, the substituent R b and R c Between, the substituent R a and R N1 Between, the substituent R b and R N1 Between, the substituent R a and R C1 Between, the substituent R a and R C2 Between, the substituent R b and R C1 Between, the substituent R b and R C2 Between, and R C1 and R C2 Any one or more of these substituent groups may be linked to form a ring.

[0187] 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.

[0188] Obviously, these substituents may not be connected to form a ring.

[0189] According to one embodiment of the present invention, the metal complex, wherein the metal M is selected from the group consisting of Cu, Ag, Au, Ru, Rh, Pd, Os, Ir and Pt each time it appears, the same or different;

[0190] According to one embodiment of the present invention, in the metal complex, the metal M is selected from Pt or Ir the same or differently each time it appears.

[0191] According to one embodiment of the present invention, at least one of X1-X4 is selected from CR x , and the R x Selected from D.

[0192] According to one embodiment of the present invention, at least one of Y1-Y4 is selected from CR y , and the R y Selected from D.

[0193] According to one embodiment of the present invention, the metal complex has Ir(L a ) m (L b ) 3-mThe general structure of

[0194] The structure represented by formula 3b is:

[0195]

[0196] in,

[0197] m is selected from 1, 2 or 3; when m is selected from 1, two L b The same or different; when m is selected from 2 or 3, multiple L a Same or different;

[0198] Each occurrence of Z is identical or different and is selected from the group consisting of O, S, Se, NR2, CR2R2, SiR2R2 and GeR2R2; when two R2 are present at the same time, the two R2 are identical or different;

[0199] U1-U8 are selected from CR in the same or different way each time they appear. u or N;

[0200] X3-X8 are selected from CR in the same or different way each time they appear x or N;

[0201] Each occurrence of Y1-Y4 is identical or different and is selected from CR y or N;

[0202] R2, R u , R x and R y The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof;

[0203] Adjacent substituent R u can optionally be linked to form a ring;

[0204] Adjacent substituent R x , R2, R y Can optionally be linked to form a ring.

[0205] In this context, “the adjacent substituent R u "can optionally be linked to form a ring" is intended to mean that adjacent groups of substituents, for example, substituents R u and the substituent R u Any one or more of these substituents may be connected to form a ring. Obviously, none of these substituents may be connected to form a ring.

[0206] According to one embodiment of the present invention, m is selected from 1 or 2; preferably, m is selected from 1.

[0207] According to one embodiment of the present invention, Z is selected from O or S; preferably, Z is selected from O.

[0208] According to one embodiment of the present invention, at least one of X3 and X4 is selected from CR x , and the R x Selected from D; or, at least one of Y1-Y4 is selected from CR y , and the R y Selected from D.

[0209] According to one embodiment of the present invention, X4 is selected from CR x , and the R x Selected from D, or at least one of Y1 and Y4 is selected from CR y , and the R y Selected from D.

[0210] According to one embodiment of the present invention, X5-X8 are selected from CR x ; said R x One of them is selected from cyano or fluorine, and at least one R xselected from the group consisting of deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclyl having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted cycloalkyl ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amine group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a thiol group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof.

[0211] According to one embodiment of the present invention, at least one of X3-X8 is CR x , and the R x It is cyano or fluorine.

[0212] According to one embodiment of the present invention, at least one of X5-X8 is CR x , and the R x It is cyano or fluorine.

[0213] According to one embodiment of the present invention, at least one of X7-X8 is CR x , and the R x It is cyano or fluorine.

[0214] According to one embodiment of the present invention, X7 is CR x , and the R x It's cyano.

[0215] According to one embodiment of the present invention, at least two of X5-X8 are CR x , the R x One of them is selected from cyano or fluorine, and at least one R xselected from the group consisting of deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclyl having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted cycloalkyl ... atom, an alkynyl group having 6 to 30 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amine group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a thiol group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof.

[0216] According to one embodiment of the present invention, at least two of X5-X8 are CR x , the R x One of them is selected from cyano or fluorine, and at least one R x Selected from the group consisting of deuterium, halogen, substituted or unsubstituted alkyl having 1-6 carbon atoms, substituted or unsubstituted cycloalkyl having 3-6 ring carbon atoms, substituted or unsubstituted aryl having 6-12 carbon atoms, substituted or unsubstituted heteroaryl having 3-12 carbon atoms, and combinations thereof.

[0217] According to one embodiment of the present invention, at least two of X5-X8 are CR x , the R x One of them is selected from cyano or fluorine, and at least one R x Selected from the group consisting of a substituted or unsubstituted aryl group having 6 to 12 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 12 carbon atoms, and a combination thereof.

[0218] According to one embodiment of the present invention, Y2 and Y3 are selected from CR y , the R yEach occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted 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 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, and combinations thereof.

[0219] According to one embodiment of the present invention, R y Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-6 carbon atoms, substituted or unsubstituted cycloalkyl having 3-6 ring carbon atoms, substituted or unsubstituted aryl having 6-12 carbon atoms, substituted or unsubstituted heteroaryl having 3-12 carbon atoms, and combinations thereof.

[0220] According to one embodiment of the present invention, R y Selected from the group consisting of hydrogen, deuterium, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, and combinations thereof.

[0221] According to one embodiment of the present invention, each time U1-U8 appears, it is selected from CR u , and the R u Selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted alkylgermanyl having 3-20 carbon atoms, and combinations thereof.

[0222] According to one embodiment of the present invention, R u Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted alkyl having 1 to 6 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 6 ring carbon atoms, substituted or unsubstituted aryl having 6 to 12 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 12 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 12 carbon atoms, substituted or unsubstituted alkylgermanyl having 3 to 12 carbon atoms, and combinations thereof.

[0223] According to one embodiment of the present invention, R u Each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, fluorine, 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.

[0224] According to one embodiment of the present invention, L a Each occurrence is selected from L a1 -L a400 Groups composed of:

[0225]

[0226]

[0227]

[0228]

[0229]

[0230]

[0231]

[0232]

[0233]

[0234]

[0235]

[0236]

[0237]

[0238]

[0239]

[0240]

[0241]

[0242]

[0243]

[0244]

[0245]

[0246] According to one embodiment of the present invention, the La1 to La 440 The hydrogen in the ion can be partially or completely replaced by deuterium.

[0247] According to one embodiment of the present invention, L b Each occurrence is selected from L b1 -L b166 Groups composed of:

[0248]

[0249]

[0250]

[0251]

[0252] Optionally, the above L b1 To L b18 , L b20 To L b26 and L b31 To L b166 The hydrogen in the ion can be partially or completely replaced by deuterium.

[0253] According to one embodiment of the present invention, the metal complex is selected from the group consisting of metal complex 1 to metal complex 71:

[0254]

[0255]

[0256]

[0257]

[0258]

[0259]

[0260]

[0261] According to one embodiment of the present invention, hydrogen in the metal complexes 1 to 71 can be partially or completely replaced by deuterium.

[0262] According to another embodiment of the present invention, the third organic layer is a light-emitting layer.

[0263] According to another embodiment of the present invention, the light-emitting layer further includes a first host compound.

[0264] According to another embodiment of the present invention, the light-emitting layer further includes a second host compound.

[0265] 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.

[0266] According to another embodiment of the present invention, the metal complex is doped in the first host compound and the second host compound, and the weight of the metal complex accounts for 1% to 30% of the total weight of the light-emitting layer; preferably, the weight of the metal complex accounts for 3% to 13% of the total weight of the light-emitting layer.

[0267] According to one embodiment of the present invention, a display assembly is disclosed, which includes the electroluminescent device described in any one of the above embodiments, or includes the composition described in the above embodiments.

[0268] Combination with other materials

[0269] 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.

[0270] 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.

[0271] The first metal complex, the first compound and the second compound used in the present invention can be easily obtained by referring to the preparation method in the prior art or the applicant's prior application. For example, the first metal complex of the present invention can be prepared by referring to US20200251666A1, US20220259239A1, US20230058719A1, US20230047519A1, US20230189629A1, the first compound of the present invention can be prepared by referring to US20200062778A1, US20190181349A1, and the second compound of the present invention can be prepared by referring to WO2022182124 A1, WO2024128540A1, and the preparation method thereof will not be repeated here. The documents listed above are only exemplary, and those skilled in the art can easily obtain other documents.

[0272] The preparation method of the electroluminescent device is not limited. The preparation method of the following embodiment is only an example and should not be construed as limiting. A person skilled in the art can reasonably improve the preparation method of the following embodiment based on the prior art. For example, the ratio of various materials in the light-emitting layer is not particularly limited. A person skilled in the art can reasonably select within a certain range based on the prior art. For example, based on the total weight of the light-emitting layer material, the main material can account for 80%-99%, and the light-emitting material can account for 1%-20%; or the main material can account for 90%-99%, and the light-emitting material can account for 1%-10%; or the main material can account for 94%-99%, and the light-emitting material can account for 1%-6%. In addition, the main material can be one or two materials, and the ratio of the two main materials to the main material can be 99:1 to 1:99; or, the ratio can be 80:20 to 20:80; or, the ratio can be 60:40 to 40:60. In the embodiments of the device, the characteristics of the device are also tested using conventional equipment in the field (including but not limited to the vapor deposition machine produced by Angstrom Engineering, the optical testing system and life testing system produced by Suzhou Fusida, the ellipsometer produced by Beijing Liangtuo, etc.) using methods familiar to those skilled in the art.

[0273] Device Embodiment

[0274] Device Example 1

[0275] First, a 0.7 mm thick glass substrate with a pre-patterned The thick indium tin oxide (ITO) was used as the anode. After washing the substrate with deionized water and detergent, the ITO surface was treated with oxygen plasma and UV ozone. Subsequently, the substrate was dried in a glove box to remove moisture and loaded on a rack into a vacuum chamber. The organic layers specified below were placed in a vacuum of about 10 -6 Torr's case The anode layer was deposited sequentially by vacuum thermal evaporation at a rate of: first, compound B-122 and compound 70 were simultaneously deposited as a hole injection layer (HIL, 97:3, ), the evaporated compound B-122 was used as a hole transport layer (HTL, ), on which compound B-122, compound GH and metal complex 71 were simultaneously deposited as a light-emitting layer (EML, 66:28:6, ), evaporated compound HB as a hole blocking layer (HBL, ), compound ET and Liq were co-deposited as electron transport layer (ETL, 40:60, ), evaporation Thick Liq is used as the electron injection layer (EIL). Finally, aluminum is evaporated as the cathode. ). The device was then transferred back to the glove box and encapsulated with a glass cover slip to complete the device.

[0276] Embodiment 2:

[0277] The preparation method was the same as that of Example 1, except that compound B-26 and compound 70 were simultaneously deposited as a hole injection layer (HIL, 97:3, ), the evaporated compound B-26 was used as a hole transport layer (HTL, ).

[0278] Embodiment 3:

[0279] The preparation method was the same as that of Example 1, except that compound B-68 and compound 70 were simultaneously deposited as a hole injection layer (HIL, 97:3, ), the evaporated compound B-68 was used as a hole transport layer (HTL, ).

[0280] Embodiment 4:

[0281] The preparation method is the same as that of Example 2, except that compound B-26, compound GH and metal complex 71 are simultaneously deposited as the light-emitting layer (EML, 66:28:6, )150

[0282] Comparative Example 1:

[0283] The preparation method was the same as that of Example 1, except that compound HT1 and compound 70 were simultaneously deposited as the hole injection layer (HIL, 97:3, ), the evaporated compound HT1 was used as a hole transport layer (HTL, ).

[0284] Comparative Example 2:

[0285] The preparation method was the same as that of Example 1, except that compound B-122 and compound PD1 were simultaneously deposited as a hole injection layer (HIL, 97:3, ).

[0286] Table 1 lists some device structures of Examples 1 to 4 and Comparative Examples 1 to 2.

[0287] Table 1 Partial device structures of Examples 1-4 and Comparative Examples 1-2

[0288]

[0289]

[0290] The material structure used in the device is shown below:

[0291]

[0292]

[0293] Table 2 shows the performance of some devices in Examples 1 to 4 and Comparative Examples 1 to 2. 2 The device life LT95 data is measured at 80mA / cm 2 The device brightness decays to 95% of the initial brightness when driven.

[0294] Table 2 Device performance of Example 1-Example 4 and Comparative Example 1-Comparative Example 2

[0295] serial number Voltage (V) Lifespan LT95(h) Example 1 4.10 56 Example 2 4.10 74 Example 3 4.22 60 Example 4 4.11 52 Comparative Example 1 4.61 40 Comparative Example 2 8.72 40

[0296] discuss:

[0297] The device of Example 1 simultaneously uses a specific combination of the first compound 70 and the second compound B-122 within the scope of the present invention.

[0298] The device of Comparative Example 1 uses the first compound 70 within the scope of the present invention and the second compound HT1 outside the scope of the present invention; compared with Comparative Example 1, the voltage of Example 1 is reduced by 0.5V, a relative reduction of 10.87%, and the life span is increased by 40%.

[0299] The device of Comparative Example 2 uses the second compound B-122 within the scope of the present invention and the first compound PD1 outside the scope of the present invention; compared with Comparative Example 2, the voltage of Example 1 is reduced by 4.6V, a relative reduction of 52.87%, and the life span is increased by 40%.

[0300] It can be seen from this that the present invention uses a specific combination of the first compound and the second compound in the electroluminescent device, so that the electroluminescent device has a lower voltage, a longer device life, and can obtain better comprehensive device performance.

[0301] At the same time, Examples 2 to 4 of the present invention further provide material combinations of first compounds and second compounds of different structures within the scope of the present invention. According to their device performance data, lower voltage and longer device life are achieved.

[0302] In summary, the combination of materials of a specific structure selected in the electroluminescent device disclosed in the present invention enables the device to have more excellent device performance and unique advantages, provides the possibility for further optimization of the device structure, and has broad application prospects in business.

[0303] It should be understood that the various embodiments described herein are only examples and are not intended to limit the scope of the present invention. Therefore, as will be apparent to those skilled in the art, the claimed invention may include variations of the specific embodiments and preferred embodiments described herein. Many of the materials and structures described herein may be replaced with other materials and structures without departing from the spirit of the present invention. It should be understood that the various theories about why the present invention works are not intended to be restrictive.

Claims

1. An electroluminescent device, comprising: Anode, cathode, and a first organic layer disposed between the anode and the cathode; The first organic layer comprises a first compound and a second compound; The first compound has a structure represented by Formula 1; Among them, in formula 1, X and Y are selected, at each occurrence, identically or differently, from NR', CR"R"', O, S or Se; Z1 and Z2 are each identically or differently selected from O, S or Se; R, R', R" and R'" are each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted 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 cycloalkyl having 1-20 carbon atoms, atom, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, and combinations thereof; Adjacent substituents R, R', R" and R'" in Formula 1 can be optionally linked to form a ring; The second compound has a structure represented by Formula 2; Among them, in formula 2, W is selected from CR in the same or different way at each occurrence w or N; L1 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 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Each occurrence of Z3 is identical or different and is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1, BR1 and PR1; when two R1s are present at the same time, the two R1s are identical or different; Ar1 is the same or different each time it occurs and is selected 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; R1, R w The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R1, R w Can optionally be linked to form a ring.

2. The electroluminescent device according to claim 1, wherein the first compound comprises At least one of R, R', R" and R'" is a group having at least one electron withdrawing group, wherein the electron withdrawing group is selected from the group consisting of halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphino, azaaromatic ring group, and substituted by one or more of halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphino, azaaromatic ring group Any of the following groups: alkyl groups having 1-20 carbon atoms, cycloalkyl groups having 3-20 ring carbon atoms, heteroalkyl groups having 1-20 carbon atoms, aralkyl groups having 7-30 carbon atoms, alkoxy groups having 1-20 carbon atoms, aryloxy groups having 6-30 carbon atoms, alkenyl groups having 2-20 carbon atoms, alkynyl groups having 2-20 carbon atoms, aryl groups having 6-30 carbon atoms, heteroaryl groups having 3-30 carbon atoms, alkylsilyl groups having 3-20 carbon atoms, arylsilyl groups having 6-20 carbon atoms, and combinations thereof.

3. The electroluminescent device according to claim 2, wherein: The electron withdrawing group is selected from the group consisting of F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, pyrimidinyl, triazine, and combinations thereof.

4. The electroluminescent device according to claim 1, wherein X and Y at each occurrence are identically or differently selected from the group consisting of: S, Se, Preferably, wherein X and Y are Wherein "*" represents the connection position of the X and Y groups in Formula 1.

5. The electroluminescent device according to claim 1, wherein R is selected, at each occurrence, the same or different, from the group consisting of hydrogen, deuterium, methyl, isopropyl, NO2, SO2CH3, SCF3, C2F5, OC2F5, OCH3, diphenylmethylsilyl, phenyl, methoxyphenyl, p-methylphenyl, 2,6-diisopropylphenyl, biphenyl, polyfluorophenyl, difluoropyridyl, nitrophenyl, dimethylthiazolyl, vinyl substituted with one or more of CN or CF3, ethynyl substituted with one of CN or CF3, dimethylphosphinoyl, diphenylphosphinoyl, F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, trifluoromethylphenyl, trifluoromethoxyphenyl, bis(trifluoromethyl)phenyl, bis(trifluoromethoxy)phenyl, 4-cyanotetrafluorophenyl, phenyl or biphenyl substituted with one or more of F, CN or CF3, tetrafluoropyridyl, pyrimidinyl, triazine, diphenylboryl, oxaboranthenyl, and combinations thereof.

6. The electroluminescent device according to any one of claims 1 to 5, wherein: Each occurrence of R is identically or differently selected from the group consisting of: Preferably, in a compound represented by Formula 1, two R are the same; in, represents the connection position of the R group in Formula 1.

7. The electroluminescent device according to any one of claims 1 to 6, wherein: The first compound is selected from the group consisting of Compound 1 to Compound 182, and Compound 1 to Compound 182 have a structure represented by Formula 1-1: Wherein, the two Z in Formula 1-1 have the same structure, the two R structures are the same or different, and the Z, X, Y, and R correspond to atoms or groups selected from the following table respectively; 8. The electroluminescent device according to any one of claims 1 to 7, wherein: In Formula 2, W is selected from CR w , the R w 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 groups having 6-30 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanyl groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanyl groups having 6-20 carbon atoms, substituted or unsubstituted amino groups having 0-20 carbon atoms, cyano groups, isocyano groups, hydroxyl groups, mercapto groups, sulfinyl groups, sulfonyl groups, phosphino groups, and combinations thereof; Preferably, R w each occurrence is identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 20 carbon atoms, cyano, and combinations thereof; More preferably, R w The group consisting of hydrogen, deuterium, fluorine, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, cyano, and combinations thereof is selected at each occurrence, the same or different.

9. The electroluminescent device according to any one of claims 1 to 7, wherein: Said Z3 is selected from O, S, Se, CR1R1 or NR1 at each occurrence, the same or different; Preferably, each occurrence of Z3 is identically or differently selected from NR1; More preferably, the second compound has a structure represented by Formula 2-1: Among them, in formula 2-1, W is selected from CR in the same or different way at each occurrence w or N; L1 and L2 are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Ar1 and Ar2 are the same or different each time and are selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 30 carbon atoms, or a combination thereof; R w The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituent R w Can optionally be linked to form a ring.

10. The electroluminescent device according to claim 9, wherein Ar1 and Ar2 are identically or differently selected at each occurrence from a substituted or unsubstituted aryl group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 20 carbon atoms, or a combination thereof; Preferably, Ar1 and Ar2 are selected from the following group at each occurrence, the same or different: substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted phenanthrenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted triphenylene, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, and combinations thereof.

11. The electroluminescent device according to claim 9, wherein: L1 and L2 are identically or differently selected at each occurrence from a single bond, a substituted or unsubstituted alkylene group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene group having 3 to 20 carbon atoms, a substituted or unsubstituted arylene group having 6 to 20 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 20 carbon atoms, or a combination thereof; Preferably, wherein L1 and L2 are identically or differently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene, a substituted or unsubstituted pyridylene, or a combination thereof at each occurrence; More preferably, L1 and L2 are identically or differently selected from a single bond or a phenylene group each time they occur.

12. The electroluminescent device according to claim 9, wherein: The first compound is a first organic material; The first organic material is selected from the group consisting of compound B-1 to compound B-165, and the structures of compound B-1 to compound B-165 are shown below: Optionally, the hydrogen in the above compounds B-1 to B-165 can be partially or completely replaced by deuterium; Preferably, at least one hydrogen in the first organic material is replaced by deuterium; More preferably, the first organic layer is a hole injection layer, and the first organic material is a P-type conductive doping material.

13. The electroluminescent device according to any one of claims 1 to 11, wherein: The second compound is a second organic material; Preferably, the first organic layer is a hole injection layer, and the second organic material is a hole transport material.

14. The electroluminescent device according to any one of claims 1 to 13, wherein: The electroluminescent device further comprises a second organic layer, the second organic layer being disposed between the first organic layer and the cathode; Preferably, the second organic layer is in direct contact with the first organic layer; More preferably, the second organic layer comprises a third compound, the third compound is a third organic material, and the third organic material is the same as or different from the second organic material; More preferably, preferably, the third organic material and the second organic material are the same.

15. The electroluminescent device according to claim 14, wherein: The second organic layer is a hole transport layer, and the third organic material is a hole transport material.

16. The electroluminescent device according to any one of claims 1 to 15, wherein: The thickness of the first organic layer is 5-20 nm; preferably, the thickness of the first organic layer is 10-15 nm.

17. The electroluminescent device according to claim 12, wherein: The doping weight ratio of the P-type conductive doping material accounts for 0.5%-10.0% of the first organic layer; Preferably, the doping weight ratio of the P-type conductive doping material accounts for 1.5%-3.0% of the first organic layer.

18. A composition comprising a first compound having a structure of Formula 1 and a second compound having a structure of Formula 2; The first compound has a structure represented by Formula 1; in, In formula 1, X and Y are selected, at each occurrence, identically or differently, from NR', CR"R"', O, S or Se; Z1 and Z2 are each identically or differently selected from O, S or Se; R, R', R" and R'" are each identically or differently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted 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 cycloalkyl having 1-20 carbon atoms, atom, a substituted or unsubstituted aryloxy group having 6 to 30 carbon atoms, a substituted or unsubstituted alkenyl group having 2 to 20 carbon atoms, a substituted or unsubstituted alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, and combinations thereof; Adjacent substituents R, R', R" and R'" in Formula 1 can be optionally linked to form a ring; The second compound has a structure represented by Formula 2; Among them, in formula 2, W is selected from CR in the same or different way at each occurrence w or N; L1 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 30 carbon atoms, a substituted or unsubstituted heteroarylene group having 3 to 30 carbon atoms, or a combination thereof; Each occurrence of Z3 is identical or different and is selected from the group consisting of O, S, Se, NR1, CR1R1, SiR1R1, BR1 and PR1; when two R1s are present at the same time, the two R1s are identical or different; Ar1 is the same or different each time it occurs and is selected 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; R1, R w The group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclyl having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted an alkynyl group having 2 to 20 carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, a substituted or unsubstituted alkylsilyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylsilyl group having 6 to 20 carbon atoms, a substituted or unsubstituted alkylgermanyl group having 3 to 20 carbon atoms, a substituted or unsubstituted arylgermanyl group having 6 to 20 carbon atoms, a substituted or unsubstituted amino group having 0 to 20 carbon atoms, an acyl group, a carbonyl group, a carboxylic acid group, an ester group, a cyano group, an isocyano group, a hydroxyl group, a mercapto group, a sulfinyl group, a sulfonyl group, a phosphino group, and combinations thereof; Adjacent substituents R1, R w Can optionally be linked to form a ring.

19. A display component comprising the electroluminescent device according to any one of claims 1 to 17, or the composition according to claim 18.

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