An organic electroluminescent device

Abstract

Disclosed is a novel organic electroluminescent device. The novel organic electroluminescent device comprises an anode, a cathode and a first organic layer disposed between the anode and the cathode, the first organic layer comprising at least a first compound having a structure of formula 1 and a second compound having a structure of formula 2. The novel organic electroluminescent device has lower voltage, higher efficiency and longer lifetime, and can provide better device performance. Also disclosed are a display assembly and a compound combination.

Description

Technical Field

[0001] This invention relates to organic electronic devices, such as organic electroluminescent devices. More particularly, it relates to a novel organic electroluminescent device comprising a first compound having the structure of Formula 1 and a second compound having the structure of Formula 2 in a first organic layer. Background Technology

[0002] Organic electronic devices include, but are not limited to, the following: 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 photosensors, organic field-effect devices (OFQDs), light-emitting electrochemical cells (LECs), organic laser diodes, and organic plasma light-emitting devices.

[0003] In 1987, Tang and Van Slyke of Eastman Kodak reported a bilayer organic electroluminescent device comprising an arylamine hole transport layer and a tri-8-hydroxyquinoline-aluminum layer as both an electron transport and luminescent layer (Applied Physics Letters, 1987, 51(12): 913-915). Once a bias voltage was applied to the device, green light was emitted. This invention laid the foundation for the development of modern organic light-emitting diodes (OLEDs). State-of-the-art OLEDs can include multiple layers, such as charge injection and transport layers, charge and exciton blocking layers, and one or more luminescent layers between the cathode and anode. Because OLEDs are self-emissive solid-state devices, they offer enormous potential for display and lighting applications. Furthermore, the inherent properties of organic materials, such as their flexibility, make them well-suited for specialized applications, such as in the fabrication of flexible substrates.

[0004] OLEDs can be classified into three different types based on their light-emitting mechanism. The OLED invented by Tang and van Slyke is a fluorescent OLED. It uses only singlet state emission. The triplet state 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 hindered the commercialization of OLEDs. In 1997, Forrest and Thompson reported phosphorescent OLEDs, which use triplet emission from complexed heavy metals as the emitter. Therefore, both 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 small singlet-triple state gaps, making it possible for excitons to return from the triplet state to the singlet state. 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 OLEDs and polymer OLEDs based on the form of the materials used. Small molecules refer to any organic or organometallic material that is not a polymer. Small molecules can have large molecular weights, provided they have a precise structure. Dendritic polymers with well-defined structures are considered small molecules. Polymer OLEDs include conjugated polymers and non-conjugated polymers with side-chain luminescent groups. Small-molecule OLEDs can become polymer OLEDs if post-polymerization occurs during manufacturing.

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

[0007] Organic light-emitting diodes (OLEDs) convert electrical energy into light by applying a voltage across their terminals. Typically, an OLED comprises an anode, a cathode, and an organic layer between them. The organic layer includes a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer (containing the host material and dopant materials), an electron buffer layer, a hole blocking layer, an electron transport layer, and an electron injection layer. Based on their functions, the materials comprising the organic layer can be categorized as hole injection materials, hole transport materials, electron blocking materials, host materials, light-emitting materials, electron buffer materials, hole blocking materials, electron transport materials, and hole blocking materials. When a bias voltage is applied to the device, holes are injected from the anode into the light-emitting layer, and electrons are injected from the cathode into the light-emitting layer. Holes and electrons meet to form excitons, which recombine to emit light.

[0008] The hole injection layer is one of the key functional layers affecting the performance of organic light-emitting diodes (OLEDs). The selection and combination of its materials significantly impact OLED performance, such as driving voltage, efficiency, and lifetime. Early OLED devices mostly consisted of a single organic material layer between the anode and the emissive layer, serving functions such as hole injection, hole transport, and even electron blocking. This device structure, limited by a single hole transport material, could not achieve ideal energy level matching, thus hindering the attainment of truly optimal performance. As industry demands for device performance have increased, the performance requirements for the hole transport region between the anode and the emissive layer have also risen. Subsequently, hole transport materials were further subdivided into two layers: a hole injection layer and a hole transport layer. At this stage, a single triarylamine-based material is typically used as the hole injection layer. Common triarylamine-based materials include:

[0009] , , .

[0010] Currently, the most advanced device structures in the industry typically employ multiple organic layers between the anode and the light-emitting layer to achieve hole injection, hole transport, and electron blocking functions, respectively. To achieve better hole injection performance, a certain proportion of p-type dopant is often added to the hole transport material (such as aromatic amine compounds) in the hole injection layer. Common p-type dopant materials include:

[0011] , , , , .

[0012] Commercially, there is a demand for organic electroluminescent devices with characteristics such as low driving voltage, high efficiency, and long lifespan. Therefore, the development of novel hole injection layers is a critical research area. Summary of the Invention

[0013] The present invention aims to provide a series of novel organic electroluminescent devices to solve at least some of the aforementioned problems. The organic electroluminescent device includes a first organic layer containing a first compound having the structure of Formula 1 and a second compound having the structure of Formula 2. This novel organic electroluminescent device exhibits lower voltage, higher efficiency, and longer lifetime, providing better device performance.

[0014] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0015] anode,

[0016] cathode,

[0017] and a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises at least a first compound and a second compound;

[0018] The first compound has a structure represented by Formula 1:

[0019] ;

[0020] In Equation 1,

[0021] Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different.

[0022] L is selected from the same or different times each time it appears. ,or or any combination thereof;

[0023] Cyclic AA is a conjugated structure of 4-30 ring atoms with at least one intracyclic double bond;

[0024] n is an integer selected from 0 to 10, either identically or differently each time it appears;

[0025] Y is selected freely by CR each time it appears, either the same or different. L A group consisting of N;

[0026] Ring A, each time it appears, is a 5-membered heterocycle, and the 5-membered heterocycle contains an intracyclic double bond, at least one nitrogen atom, and at least one w atom; the w atom, each time it appears, is selected from O, S, Se, and NR. N The group formed;

[0027] R and R L Each occurrence, whether identical or different, indicates monosubstitution, polysubstitution, or no substitution;

[0028] R, R', R", R"', R L and R NEach time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alksilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof;

[0029] Adjacent substituents R, R L They can optionally connect to form a ring, and when adjacent substituents R L When the links form a ring, the resulting ring has at least four ring atoms;

[0030] The second compound has a structure represented by Formula 2:

[0031] ;

[0032] In Equation 2,

[0033] Q is selected from C, Si, or Ge;

[0034] X1 to X8 are selected from CR3 or CR4 each time they appear, either identically or differently. x Or N, at least one of X1 to X8 is selected from CR x The R x It has the following structure: ;

[0035] Among them, L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof;

[0036] Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms;

[0037] R1, R2, and R3, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms.

[0038] Adjacent substituents R1, R2, and R3 can optionally connect to form a ring.

[0039] According to another embodiment of the present invention, a display component is also disclosed, which includes the organic electroluminescent device shown in the above embodiments.

[0040] According to another embodiment of the present invention, a compound combination comprising the first compound and the second compound is also disclosed.

[0041] The novel organic electroluminescent device disclosed in this invention includes a first organic layer containing a first compound having the structure of Formula 1 and a second compound having the structure of Formula 2. This novel organic electroluminescent device exhibits lower voltage, higher efficiency, and longer lifetime, providing better device performance. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of an organic light-emitting device that may contain the organic electroluminescent devices disclosed herein.

[0043] Figure 2 This is a schematic diagram of another organic light-emitting device that may contain the organic electroluminescent devices disclosed herein. Detailed Implementation

[0044] OLEDs can be manufactured on various substrates, such as glass, plastic, and metal. Figure 1 An organic light-emitting device 100 is illustrated schematically and non-limitingly. The figures are not necessarily drawn to scale, and some layer structures may be omitted as needed. 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. Device 100 can be fabricated by sequentially depositing the described layers. The properties and functions of each layer, as well as exemplary materials, are described in more detail in columns 6-10 of U.S. Patent 7,279,704B2, the entire contents of which are incorporated herein by reference.

[0045] Each of these layers has numerous examples. For instance, a flexible and transparent substrate-anode combination is disclosed in U.S. Patent No. 5,844,363, which is incorporated herein 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 herein 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 herein 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 herein by reference in its entirety. Examples of cathodes are disclosed in U.S. Patent Nos. 5,703,436 and 5,707,745, which are incorporated herein by reference in their entirety. These cathodes comprise composite cathodes having a thin metal layer, such as Mg:Ag, overlaid with a 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 also incorporated herein by reference in their entirety. Examples of implantation layers are provided in U.S. Patent Application Publication No. 2004 / 0174116, which is also incorporated herein by reference in its entirety. A description of protective layers can be found in U.S. Patent Application Publication No. 2004 / 0174116, which is also incorporated herein by reference in its entirety.

[0046] The layered structure described above is provided through non-limiting embodiments. The functionality of an OLED can be achieved by combining the various layers described above, or some layers can be omitted entirely. It may also include other layers not explicitly described. Within each layer, a single material or a mixture of multiple materials can be used to achieve optimal performance. Any functional layer may include several sublayers. For example, a light-emitting layer may have two different light-emitting materials to achieve a desired emission spectrum.

[0047] In one embodiment, an OLED can be described as having an "organic layer" disposed between a cathode and an anode. This organic layer may include one or more layers.

[0048] OLEDs also require an encapsulation layer, such as Figure 2 An organic light-emitting device 200 is shown schematically and non-limitingly, which is related to... Figure 1 The difference lies in the fact that an encapsulation layer 102 may also be included above the cathode 190 to protect against harmful substances from the environment, such as moisture and oxygen. Any material capable of providing encapsulation can be used as the 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 7,968,146B2, the entire contents of which are incorporated herein by reference.

[0049] Devices manufactured according to embodiments of the present invention can be incorporated into a variety of consumer products having one or more electronic component modules (or units). Some examples of such consumer products include flat panel displays, monitors, medical monitors, televisions, billboards, lights for indoor or outdoor lighting and / or signaling, head-up displays, fully or partially transparent displays, flexible displays, smartphones, tablet computers, phablets, wearable devices, smartwatches, laptop computers, digital cameras, portable camcorders, viewfinders, microdisplays, 3D displays, vehicle displays, and taillights.

[0050] The materials and structures described in this article can also be used in other organic electronic devices listed above.

[0051] As used herein, "top" means furthest from the substrate, and "bottom" means closest to the substrate. When the first layer is described as being "disposed" on the second layer, the first layer is positioned further from the substrate. Unless it is specified that the first layer "contacts" the second layer, other layers may exist between the first and second layers. For example, even if various organic layers exist between the cathode and anode, the cathode may still be described as being "disposed" on the anode.

[0052] As used herein, “solution-handleable” means capable of being dissolved, dispersed or transported in and / or deposited from a liquid medium in the form of a solution or suspension.

[0053] When a ligand is believed to directly contribute to the photosensitivity of the emitting material, the ligand can be called "photosensitive." When a ligand is believed not to contribute to the photosensitivity of the emitting material, the ligand can be called "auxiliary," but auxiliary ligands can alter the properties of photosensitivity ligands.

[0054] 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: P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence is generated by triplet-triplet annihilation (TTA).

[0055] On the other hand, E-type delayed fluorescence does not depend on the collision of two triplet states, but rather on the transition between triplet and singlet excited states. Compounds capable of producing E-type delayed fluorescence need to have a very small singlet-triple gap to facilitate the transition between energy states. Thermal energy can activate the transition from triplet to singlet. This type of delayed fluorescence is also called thermally activated delayed fluorescence (TADF). A significant characteristic of TADF is that the delayed component increases with increasing temperature. If the reverse system crossover (RISC) rate is fast enough to minimize the nonradiative decay from the triplet state, the fraction of singlet excited states that are refilled can reach 75%. The total singlet fraction can be 100%, far exceeding the 25% spin statistics of electrogenerated excitons.

[0056] E-type delayed fluorescence can be observed in excited complex systems or single compounds. Unbound by theory, it is believed that E-type delayed fluorescence requires the luminescent material to have a small singlet-triple bandgap (ΔE). S-T Organic, nonmetallic donor-acceptor luminescent materials may be able to achieve this. The emission of these materials is typically characterized as donor-acceptor charge transfer (CT) emission. Spatial separation of the HOMO and LUMO in these donor-acceptor compounds usually produces small ΔE. S-T These states can include CT states. Typically, donor-acceptor luminescent materials are constructed by linking an electron donor moiety (e.g., an amino or carbazole derivative) with an electron acceptor moiety (e.g., an N-containing six-membered aromatic ring).

[0057] Definition of the term "substituent group"

[0058] Halogens or halides – as used herein, include fluorine, chlorine, bromine, and iodine.

[0059] Alkyl – As used herein, includes straight-chain and branched alkyl groups. An alkyl group can 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-pentadecanyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, and 3-methylpentyl. Among the above, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl, and n-hexyl are preferred. Additionally, the alkyl group may optionally be substituted.

[0060] Cycloalkyl – As used herein, it comprises cyclic alkyl groups. The cycloalkyl group can be a cycloalkyl group having 3 to 20 carbon atoms, preferably a cycloalkyl group having 4 to 10 carbon atoms. Examples of cycloalkyl groups 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, and 4,4-dimethylcyclohexyl are preferred. Furthermore, the cycloalkyl group may optionally be substituted.

[0061] Heteroalkyl – as used herein, a heteroalkyl group comprises one or more carbon atoms in an alkyl chain that are replaced by heteroatoms selected from the group consisting of nitrogen, oxygen, sulfur, selenium, phosphorus, silicon, germanium, and boron atoms. The heteroalkyl group can be a heteroalkyl group having 1 to 20 carbon atoms, preferably a heteroalkyl group having 1 to 10 carbon atoms, and more preferably a heteroalkyl group having 1 to 6 carbon atoms. Examples of heteroalkyl groups include methoxymethyl, ethoxymethyl, ethoxyethyl, methylthiomethyl, ethylthiomethyl, ethylthioethyl, methoxymethoxymethyl, ethoxymethoxymethyl, ethoxyethoxyethyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, mercaptomethyl, mercaptoethyl, mercaptopropyl, aminomethyl, aminoethyl, aminopropyl, dimethylaminomethyl, trimethylgermanylmethyl, trimethylgermanylethyl, trimethylgermanylisopropyl, dimethylethylgermanylmethyl, dimethylisopropylgermanylmethyl, tert-butyldimethylgermanylmethyl, triethylgermanylmethyl, triethylgermanylethyl, triisopropylgermanylmethyl, triisopropylgermanylethyl, trimethylsilylmethyl, trimethylsilylethyl, trimethylsilylisopropyl, triisopropylsilylmethyl, triisopropylsilylethyl. Additionally, heteroalkyl groups may optionally be substituted.

[0062] Alkenyl – as used herein, encompasses straight-chain, branched, and cyclic olefinic groups. An alkenyl group can be an alkenyl group containing 2 to 20 carbon atoms, preferably an alkenyl group having 2 to 10 carbon atoms. Examples of alkenyl groups 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, cyclohepttrienyl, cyclooctenyl, cyclooctatetraenyl, and norbornyl. In addition, the alkenyl group can be optionally substituted.

[0063] Alkynyl – As used herein, this term encompasses straight-chain alkynyl groups. An alkynyl group can be one containing 2 to 20 carbon atoms, preferably 2 to 10 carbon atoms. Examples of alkynyl groups include ethynyl, propynyl, propynyl, 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, propynyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, and phenylethynyl are preferred. Furthermore, the alkynyl group may be optionally substituted.

[0064] Aryl or aromatic group – as used herein, both non-fused and fused systems are considered. The aryl group can 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, phenylene oxide, perylene oxide, and azurite, with phenyl, biphenyl, terphenyl, triphenylene, fluorene, and naphthalene being preferred. Examples of non-fused aryl groups include phenyl, biphenyl-2-yl, biphenyl-3-yl, biphenyl-4-yl, p-terphenyl-4-yl, p-terphenyl-3-yl, p-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, mesitylene, and m-tetraphenyl. Additionally, the aryl group may optionally be substituted.

[0065] Heterocyclic groups or heterocycles – as used herein, non-aromatic cyclic groups are considered. 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, oxygen, sulfur, selenium, silicon, phosphorus, germanium, and boron atoms. 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 ethylene oxide, oxetane, tetrahydrofuranyl, tetrahydropyranyl, dioxopentacyclic, dioxahexacyclic, acridineyl, dihydropyrroleyl, tetrahydropyrroleyl, piperidinyl, oxazolidinyl, morpholinyl, piperazineyl, oxetane-heptanetrienyl, thioheptanetrienyl, azirane-heptanetrienyl, and tetrahydrothiorroleyl. In addition, the heterocyclic group can be optionally substituted.

[0066] Heteroaryl – as used herein, can be a non-fused or fused heteroaryl group comprising 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. Isoaryl also refers to heteroaryl. Heteroaryl can 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, indolecarbazole, pyridineindole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxtriazole, dioxazole, thiadiazol, pyridine, pyrazine, pyrazine, triazine, oxazine, oxthiazine, oxadiazine, indole, benzimidazole, indazole, indoxazine, benzoxazole, benzoisoxazole, benzothiazole, quinoline, isoquinoline Phosphine, cyclophosphine, quinazoline, quinoxaline, naphthidine, phthalazine, pteridine, xanthan, acridine, phenazine, phenothiazine, benzofuranopyridine, furanodipyridine, benzothiophenopyridine, thiophenodipyridine, benzoselenophenopyridine, selenobenzodipyridine, preferably dibenzothiophene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, triazine, benzimidazole, 1,2-azaborane, 1,3-azaborane, 1,4-azaborane, boronazole and its aza analogues. Additionally, the heteroaryl group may optionally be substituted.

[0067] Alkoxy groups – as used herein, are represented by -O-alkyl, -O-cycloalkyl, -O-heteroalkyl, or -O-heterocyclic groups. Examples and preferred examples of alkyl, cycloalkyl, heteroalkyl, and heterocyclic groups are the same as described above. An alkoxy group can be an alkoxy group having 1 to 20 carbon atoms, preferably an alkoxy group having 1 to 6 carbon atoms. Examples of alkoxy groups include methoxy, ethoxy, propoxy, butoxy, pentoxy, hexoxy, cyclopropyloxy, cyclobutyloxy, cyclopentoxy, cyclohexyloxy, tetrahydrofuranyloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy, and ethoxymethyloxy. Additionally, alkoxy groups may optionally be substituted.

[0068] Aryloxy group – as used herein, is represented by -O-aryl or -O-heteroaryl. Examples and preferred examples of aryl and heteroaryl groups are the same as described above. The aryloxy group can be an aryloxy group having 6 to 30 carbon atoms, preferably an aryloxy group having 6 to 20 carbon atoms. Examples of aryloxy groups include phenoxy and biphenyloxy groups. Additionally, the aryloxy group may optionally be substituted.

[0069] Arylalkyl – As used herein, this encompasses aryl-substituted alkyl groups. An arylalkyl group can be an arylalkyl group having 7 to 30 carbon atoms, preferably an arylalkyl group having 7 to 20 carbon atoms, and more preferably an arylalkyl group having 7 to 13 carbon atoms. Examples of arylalkyl 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 The compounds include alkyl groups, such as o-methylbenzyl, p-chlorobenzyl, m-chlorobenzyl, o-chlorobenzyl, p-bromobenzyl, m-bromobenzyl, o-bromobenzyl, p-iodobenzyl, m-iodobenzyl, o-iodobenzyl, p-hydroxybenzyl, m-hydroxybenzyl, o-hydroxybenzyl, p-aminobenzyl, m-aminobenzyl, o-aminobenzyl, p-nitrobenzyl, m-nitrobenzyl, o-nitrobenzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-hydroxy-2-phenylisopropyl, and 1-chloro-2-phenylisopropyl. Among the above, benzyl, p-cyanobenzyl, m-cyanobenzyl, o-cyanobenzyl, 1-phenylethyl, 2-phenylethyl, 1-phenylisopropyl, and 2-phenylisopropyl are preferred. Additionally, the alkyl group may optionally be substituted.

[0070] Alkylsilyl – As used herein, this encompasses alkyl-substituted silyl groups. The alkylsilyl group can be an alkylsilyl group having 3 to 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, tritert-butylsilyl, triisobutylsilyl, dimethyltert-butylsilyl, and methylditert-butylsilyl. Additionally, the alkylsilyl group may optionally be substituted.

[0071] Arylsilane – As used herein, encompasses at least one aryl-substituted silane group. The arylsilane can be an arylsilane having 6 to 30 carbon atoms, preferably an arylsilane having 8 to 20 carbon atoms. Examples of arylsilanes include triphenylsilyl, phenyldiphenylsilyl, diphenylbiphenylsilyl, phenyldiethylsilyl, diphenylethylsilyl, phenyldimethylsilyl, diphenylmethylsilyl, phenyldiisopropylsilyl, diphenylisopropylsilyl, diphenylbutylsilyl, diphenylisobutylsilyl, and diphenyltert-butylsilyl. Additionally, the arylsilane may optionally be substituted.

[0072] Alkylgermanium group – As used herein, this encompasses alkyl-substituted germanium groups. The alkylgermanium group can be an alkylgermanium group having 3 to 20 carbon atoms, preferably an alkylgermanium group having 3 to 10 carbon atoms. Examples of alkylgermanium groups include trimethylgermanium, triethylgermanium, methyldiethylgermanium, ethyldimethylgermanium, tripropylgermanium, tributylgermanium, triisopropylgermanium, methyldiisopropylgermanium, dimethylisopropylgermanium, tritert-butylgermanium, triisobutylgermanium, dimethyltert-butylgermanium, and methylditert-butylgermanium. Additionally, the alkylgermanium group may optionally be substituted.

[0073] Arylgermanium – As used herein, this encompasses a germanium group substituted with at least one aryl or heteroaryl group. The arylgermanium group can be an arylgermanium group having 6 to 30 carbon atoms, preferably an arylgermanium group having 8 to 20 carbon atoms. Examples of arylgermanium groups include triphenylgermanium, phenyldiphenylgermanium, diphenylbiphenylgermanium, phenyldiethylgermanium, diphenylethylgermanium, phenyldimethylgermanium, diphenylmethylgermanium, phenyldiisopropylgermanium, diphenylisopropylgermanium, diphenylbutylgermanium, diphenylisobutylgermanium, and diphenyltert-butylgermanium. Additionally, the arylgermanium group may optionally be substituted.

[0074] The term "aza" in azadibenzofuran, azadibenzothiophene, etc., refers to the substitution of one or more CH groups in the corresponding aromatic segment by a nitrogen atom. For example, azatriphenylene includes dibenzo[f,h]quinoxaline, dibenzo[f,h]quinoline, and other analogs having two or more nitrogen atoms in the ring system. Other nitrogen analogs of the aforementioned aza derivatives will readily conceive of those skilled in the art, and all such analogs are identified as being included in the terminology used herein.

[0075] In this disclosure, unless otherwise defined, the term "substituted alkyl", "substituted cycloalkyl", "substituted heteroalkyl", "substituted heterocyclic", "substituted aralkyl", "substituted alkoxy", "substituted aryl", "substituted alkenyl", "substituted alkynyl", "substituted heteroaryl", "substituted alkylsilyl", "substituted arylsilyl", "substituted alkylgermanium", "substituted arylgermanium", "substituted amino", "substituted acyl", "substituted carbonyl", and "substituted carboxylic acid" are used interchangeably. The substituted ester group, substituted sulfinyl group, substituted sulfonyl group, substituted phosphinyl group refers to any one of the following groups: alkyl, cycloalkyl, heteroalkyl, heterocyclic, aralkyl, alkoxy, aryloxy, alkenyl, alkynyl, aryl, heteroaryl, alkylsilyl, arylsilyl, alkylgermanium, arylgermanium, amino, acyl, carbonyl, carboxylic acid, ester, sulfinyl, sulfonyl, and phosphinyl groups. One or more groups can be selected from deuterium, halogen, unsubstituted alkyl groups having 1-20 carbon atoms. Cycloalkyl groups having 3-20 carbon atoms, unsubstituted heteroalkyl groups having 1-20 carbon atoms, unsubstituted heterocyclic groups having 3-20 carbon atoms, unsubstituted aralkyl groups having 7-30 carbon atoms, unsubstituted alkoxy groups having 1-20 carbon atoms, unsubstituted aryloxy groups having 6-30 carbon atoms, unsubstituted alkenyl groups having 2-20 carbon atoms, unsubstituted alkynyl groups having 2-20 carbon atoms, and unsubstituted alkyne groups having 6-30 carbon atoms. Aryl, unsubstituted heteroaryl with 3-30 carbon atoms, unsubstituted alkylsilyl with 3-20 carbon atoms, unsubstituted arylsilyl with 6-20 carbon atoms, unsubstituted alkylgermanium with 3-20 carbon atoms, unsubstituted arylgermanium with 6-20 carbon atoms, unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, mercapto, sulfinyl, sulfonyl, phosphine, and combinations thereof with 0-20 carbon atoms.

[0076] It should be understood that when a molecular fragment is described as a substituent or otherwise attached to another part, its name may 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 substituents or attaching fragments are considered equivalent.

[0077] In the compounds mentioned in this disclosure, hydrogen atoms can be partially or completely replaced by deuterium. Other atoms such as carbon and nitrogen can also be replaced by their other stable isotopes. Substitution with other stable isotopes in the compounds is likely preferred due to their ability to enhance device efficiency and stability.

[0078] In the compounds mentioned in this disclosure, polysubstituted means including disubstituted, up to the maximum range of available substitutions. When a substituent in a compound mentioned in this disclosure represents polysubstituted (including disubstituted, trisubstituted, tetrasubstituted, etc.), it means that the substituent can be present at multiple available substitution positions on its linkage structure. The substituent present at multiple available substitution positions can be the same structure or different structures.

[0079] In the compounds mentioned in this disclosure, unless explicitly specified, for example, that adjacent substituents can optionally connect to form a ring, adjacent substituents in the compounds cannot connect to form a ring. In the compounds mentioned in this disclosure, the optional connection of adjacent substituents to form a ring includes both cases where adjacent substituents can connect to form a ring and cases where adjacent substituents do not connect to form a ring. When adjacent substituents can optionally connect to form a ring, the formed ring can be a monocyclic or polycyclic ring (including spirocyclic, bridged, fused rings, etc.), as well as an alicyclic, heterocyclic, aromatic, or heteroaromatic ring. In this context, 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.

[0080] The statement that adjacent substituents can optionally connect to form a ring is also intended to be understood as referring to two substituents bonded to the same carbon atom connecting to each other via chemical bonds to form a ring, as exemplified by the following formula:

[0081] .

[0082] The statement that adjacent substituents can optionally link to form a ring is also intended to be understood as referring to two substituents bonded to carbon atoms directly bonded to each other forming a ring through chemical bonds, as exemplified by the following formula:

[0083] .

[0084] The statement that adjacent substituents can optionally connect to form a ring is also intended to be understood as referring to two substituents bonded to a further distant carbon atom connecting to each other by chemical bonds to form a ring, which can be exemplified by the following formula:

[0085] .

[0086] Furthermore, the statement that adjacent substituents can optionally connect to form a ring is also intended to mean that, in the case where one of the two adjacent substituents represents hydrogen, the second substituent bonds to the position where the hydrogen atom is bonded, thereby forming a ring. This is illustrated by the following example:

[0087] .

[0088] According to one embodiment of the present invention, an organic electroluminescent device is disclosed, comprising:

[0089] anode,

[0090] cathode,

[0091] and a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises at least a first compound and a second compound;

[0092] The first compound has a structure represented by Formula 1:

[0093] ;

[0094] In Equation 1,

[0095] Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different.

[0096] L is selected from the same or different times each time it appears. ,or or any combination thereof;

[0097] Cyclic AA is a conjugated structure of 4-30 ring atoms with at least one intracyclic double bond;

[0098] n is an integer selected from 0 to 10, either identically or differently each time it appears;

[0099] Y is selected freely by CR each time it appears, either the same or different. L A group consisting of N;

[0100] Ring A, each time it appears, is a 5-membered heterocycle, and the 5-membered heterocycle contains an intracyclic double bond, at least one nitrogen atom, and at least one w atom; the w atom, each time it appears, is selected from O, S, Se, and NR. N The group formed;

[0101] R and R L Each occurrence, whether identical or different, indicates monosubstitution, polysubstitution, or no substitution;

[0102] R, R', R", R"', R L and R NEach time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alksilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof;

[0103] Adjacent substituents R, R L They can optionally connect to form a ring, and when adjacent substituents R L When the links form a ring, the resulting ring has at least four ring atoms;

[0104] The second compound has a structure represented by Formula 2:

[0105] ;

[0106] In Equation 2,

[0107] Q is selected from C, Si, or Ge;

[0108] X1 to X8 are selected from CR3 or CR4 each time they appear, either identically or differently. x Or N, at least one of X1 to X8 is selected from CR x The R x It has the following structure: ;

[0109] Among them, L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof;

[0110] Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms;

[0111] R1, R2, and R3, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms.

[0112] Adjacent substituents R1, R2, and R3 can optionally connect to form a ring.

[0113] In this article, when L is selected When n=0, it means that L does not exist, that is, the two rings in Equation 1 are directly connected by double bonds, forming a structure as shown in Equation 1-1: .

[0114] In this embodiment, "L is selected from the same or different each time it appears" , "or any combination thereof" is intended to describe that L is selected from the same or different choices each time it appears. , ,or and A combination, or and A combination, or and The combination of .

[0115] In this paper, "adjacent substituents R, R L "Optionally connected to form a ring" is intended to indicate that adjacent sets of substituents, for example, between substituents R, substituent RL Between, substituents R and R L Between these substituent groups, any one or more of these substituent groups can connect to form a ring. When adjacent substituents R L When these substituents are linked to form a ring, the resulting ring has at least four ring atoms. It is also obvious that these substituents can form a ring without being linked.

[0116] In this document, adjacent substituents R1, R2, R3 can optionally connect to form a ring, which is intended to represent adjacent substituent groups, such as adjacent substituents R1 and R2, and adjacent substituent R3, any one or more of these substituent groups can connect to form a ring. Obviously, these adjacent substituents may also not connect to form a ring.

[0117] The terms mentioned in this disclosure have The structure of the group, wherein the ring AA is a conjugated structure with 4-30 ring atoms; the ring AA has at least one intracyclic double bond and has conjugated structural characteristics, wherein the ring AA can be a monocyclic structure, a fused ring structure, or a fused ring structure; the ring AA can be a heterocyclic structure or a carbocyclic structure. The functional groups of the structure include, but are not limited to, the structure shown in Formula 9 mentioned herein.

[0118] According to one embodiment of the present invention, in Formula 1, ring A is a 5-membered heterocycle each time it appears, and the 5-membered heterocycle comprises an intracyclic double bond, an N atom, a heteroatom W, and three carbon atoms.

[0119] According to an embodiment of the present invention, wherein in formula 1, the connection between the two sides of L is... Each time it appears, select the group consisting of free equations 4, 5, 6, and 7, either the same or different:

[0120] ;

[0121] Among them, in equations 4 to 7,

[0122] Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different.

[0123] W is chosen freely from O, S, Se, and NR each time it appears, either the same or different. N The group formed;

[0124] R, R', R", R"', R NEach time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alksilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof;

[0125] "**" represents the connection position between Equations 4 to 7 and L in Equation 1.

[0126] According to one embodiment of the present invention, L in Formula 1 is selected, either identically or differently, from the structure shown in Formula 8 or Formula 9, or a combination thereof:

[0127] , ;

[0128] In Equation 8 or Equation 9,

[0129] n is an integer selected from 0 to 10, either identically or differently each time it appears;

[0130] Y and Z are selected from CR each time they appear, either identically or differently. L Or N;

[0131] R LEach time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphoxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted groups having 7- Arylalkyl groups with 30 carbon atoms, substituted or unsubstituted alkoxy groups with 1-20 carbon atoms, substituted or unsubstituted aryloxy groups with 6-30 carbon atoms, substituted or unsubstituted alkenyl groups with 2-20 carbon atoms, substituted or unsubstituted alkynyl groups with 2-20 carbon atoms, substituted or unsubstituted aryl groups with 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3-30 carbon atoms, substituted or unsubstituted alksilyl groups with 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6-20 carbon atoms, and combinations thereof;

[0132] Adjacent substituent R L They can be optionally linked to form rings containing four or more ring atoms;

[0133] "#" and "##" represent the connection positions of Equation 8 or Equation 9 with ring A or L in Equation 1.

[0134] In this embodiment, the phrase "L is selected from the same or different structures shown in Formula 8 or Formula 9 each time it appears, or a combination thereof" is intended to express that L can be selected from any structure shown in Formula 8 or Formula 9, and can also be selected from structures formed by arbitrary connections of Formula 8 or Formula 9 through connection points "#" or "##", such as structures formed by connecting Formula 9 to itself:

[0135] ;

[0136] For example, when n=1 in equation 8, the structure formed by connecting it with equation 9 is as follows:

[0137] .

[0138] In this embodiment, "#" and "##" represent the connection positions of Equation 8 or Equation 9 with ring A or L in Equation 1" includes the following cases: any structure in Equation 8 or Equation 9 is connected to ring A in Equation 1 through "#" and "##". For example, when n=1 in Equation 8, "#" and "##" are connected to ring A to obtain the structure shown below: Furthermore, any structure in Equation 8 or Equation 9 can also be connected to any structure in Equation 8 or Equation 9 via "#" or "##", for example, the structure formed by connecting Equation 9 to itself: .

[0139] According to one embodiment of the present invention, L in the first compound is n is 0, and the first compound has a structure represented by any one of formulas I to XVI:

[0140] , , , , , , , , , , , , , , , ;

[0141] Among them, in equations I to XVI,

[0142] Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different.

[0143] W is chosen freely from O, S, Se, and NR each time it appears, either the same or different. N The group formed;

[0144] R, R', R", R"', R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof.

[0145] According to one embodiment of the present invention, the first compound has a structure represented by one of formulas I, II, V, IX, X, XI, and XVI.

[0146] According to one embodiment of the present invention, X is selected from CR'R''' each time it appears.

[0147] According to one embodiment of the present invention, the W is selected from O, S or Se each time it appears, either the same or different.

[0148] According to one embodiment of the present invention, the W is selected from O or S each time it appears, either the same or different.

[0149] According to one embodiment of the present invention, W is O.

[0150] According to one embodiment of the present invention, wherein, in Formula 1, the substituents R, R', R”, R”', R L and R N At least one of them is a group having at least one electron-withdrawing group.

[0151] According to one embodiment of the present invention, wherein, in Formula 1, the substituents R, R', R'', R'', and R'' are... L At least one of them is a group having at least one electron-withdrawing group.

[0152] According to one embodiment of the present invention, wherein, in Formula 1, the substituents R, R L and R N At least one of them is a group having at least one electron-withdrawing group.

[0153] According to one embodiment of the present invention, wherein, in Formula 1, the substituents R and R L At least one of them is a group having at least one electron-withdrawing group.

[0154] According to an embodiment of the present invention, wherein, in formula 1, when L is selected from... When n=0, the substituents R and R N At least one of them is a group having at least one electron-withdrawing group.

[0155] According to one embodiment of the present invention, wherein, in Formula 1, when X is selected from NR' or CR”R”' each time it appears, at least one of the substituents R, R', R” and R”' is a group having at least one electron-withdrawing group.

[0156] According to one embodiment of the present invention, in Formula 1, R, R', R” and R”' are each a group having at least one electron-withdrawing group.

[0157] According to one embodiment of the present invention, wherein, in Formula 1, when X is selected from NR' or CR”R”' each time it appears, at least one of R', R” and R”' is a group having at least one electron-withdrawing group.

[0158] According to one embodiment of the present invention, in Formula 1, R', R” and R”' are each a group having at least one electron-withdrawing group.

[0159] According to one embodiment of the present invention, in Formula 1, at least one of R is a group having at least one electron-withdrawing group.

[0160] According to one embodiment of the present invention, in Formula 1, each R is a group having at least one electron-withdrawing group.

[0161] According to one embodiment of the present invention, wherein R, each time it appears, is selected from substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof.

[0162] According to one embodiment of the present invention, wherein each occurrence of R is selected from substituted aryl groups having 6-30 carbon atoms, substituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof; and at least one of the substituents in the aryl and heteroaryl groups is an electron-withdrawing group.

[0163] According to one embodiment of the present invention, wherein the R, each time it appears, is selected from the same or different aryl group having 6-30 carbon atoms substituted with at least one electron-withdrawing group, the heteroaryl group having 3-30 carbon atoms substituted with at least one electron-withdrawing group, or a combination thereof.

[0164] According to one embodiment of the present invention, the Hammett constant of the electron-withdrawing group is ≥0.05, preferably ≥0.3, and more preferably ≥0.5.

[0165] The electron-withdrawing group of the present invention has a Hammett substituent constant value ≥0.05, which has a strong electron-withdrawing ability and can significantly reduce the LUMO energy level of the compound, thereby improving the charge mobility.

[0166] It should be noted that the Hammet substituent constant value includes the Hammet substituent para constant and / or meta constant. As long as either the para constant or the meta constant is greater than or equal to 0.05, it can be used as the preferred select group of the present invention.

[0167] According to one embodiment of the invention, 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, phosphoxy, azirrocycloyl, and any of the following groups substituted by one or more of halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphoxy, azirrocycloyl, having Alkyl groups having 1-20 carbon atoms, cycloalkyl groups having 3-20 cyclic 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, alksilyl groups having 3-20 carbon atoms, arylsilyl groups having 6-20 carbon atoms, and combinations thereof.

[0168] 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, pyrimidinyl, triazine, and combinations thereof.

[0169] According to one embodiment of the present invention, X is selected from the group consisting of the following structures each time it appears, either identically or differently:

[0170] O, S, Se, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , ,

[0171] Among them, V, U, and T are selected from CR each time they appear, either the same or different. v R u NR v The group consists of O, S and Se;

[0172] Ar1 is selected, either identically or differently, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms.

[0173] Among them, R a R b R c R v and R u Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phospho, substituted or unsubstituted alkyl with 1-20 carbon atoms, substituted or unsubstituted cycloalkyl with 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl with 1-20 carbon atoms, substituted or unsubstituted heterocyclic with 3-20 ring atoms, substituted or unsubstituted with 7-30 carbon atoms. Aryl groups of atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aryloxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alksilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, and combinations thereof;

[0174] Adjacent substituent R a R b R c R v and R u They can be arbitrarily connected to form a loop;

[0175] "*" represents the connection position between X, which has the above structure, and ring A in Equation 1.

[0176] In this embodiment, adjacent substituents R a Rb R c R v and R u They can be optionally linked to form a ring, intended to represent adjacent substituent groups, for example, adjacent substituent R. a Adjacent substituent R b Adjacent substituent R c Adjacent substituent R v and R u Adjacent substituent R b and R v Adjacent substituent R b and R u and adjacent substituent R a and R b Any one or more of these adjacent substituent groups can connect to form a ring. Obviously, these adjacent substituents can also remain unconnected to form a ring.

[0177] According to one embodiment of the present invention, R a Each time it appears, it is selected from the group consisting of the following, either the same or different: F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, pentafluorophenyl, 4-cyanotetrafluorophenyl, tetrafluoropyridyl, pyrimidinyl, triazine, and combinations thereof;

[0178] Among them, R c It is a group having at least one electron-withdrawing group, and for any of the above structures, when R b R v and R u When one or more of them appear, at least one of them is a group having at least one electron-withdrawing group.

[0179] According to one embodiment of the present invention, R b R v and R u When one or more of them appear, at least one of them is a group having at least one electron-withdrawing group, and the group having at least one electron-withdrawing group is selected from the group consisting of: F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, pentafluorophenyl, 4-cyanotetrafluorophenyl, tetrafluoropyridyl, pyrimidinyl, triazine, and combinations thereof.

[0180] According to one embodiment of the present invention, X is selected from the group consisting of the following structures each time it appears, either identically or differently:

[0181] O, S, Se, , , , , , , .

[0182] According to one embodiment of the present invention, X is selected from... .

[0183] According to one embodiment of the present invention, wherein R, R L and R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphoxy, hydroxyl, mercapto, substituted or unsubstituted alkyl with 1-20 carbon atoms, substituted or unsubstituted cycloalkyl with 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl with 1-20 carbon atoms, substituted or unsubstituted heterocyclic with 3-20 ring atoms, substituted or unsubstituted with 7-3 Arylalkyl groups with 0 carbon atoms, substituted or unsubstituted alkoxy groups with 1 to 20 carbon atoms, substituted or unsubstituted aryloxy groups with 6 to 30 carbon atoms, substituted or unsubstituted alkenyl groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alkoxysilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, and combinations thereof.

[0184] According to one embodiment of the present invention, wherein R, R L and R N Each time it appears, it is selected from the group consisting of the following, either identically or differently: hydrogen, deuterium, methyl, isopropyl, NO2, SO2CH3, SCF3, C2F5, OC2F5, diphenylmethylsilyl, phenyl, methoxyphenyl, p-methylphenyl, 2,6-diisopropylphenyl, biphenyl, polyfluorophenyl, difluoropyridyl, nitrophenyl, dimethylthiazolyl, CN, vinyl substituted with one or more of CN or CF3, ethynyl substituted with one of CN or CF3, dimethylphosphoxy, diphenylphosphoxy, F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, trifluoromethylphenyl, trifluoromethoxyphenyl, bis(trifluoromethyl)phenyl, bis(trifluoromethoxy)phenyl, 4-cyanotetrafluorophenyl, substituted with F, One or more substituted phenyl or biphenyl groups, tetrafluoropyridyl, pyrimidinyl, triazine, pyridyl, diphenylborane, oxaboranthyl, and combinations thereof, in CN or CF3.

[0185] According to one embodiment of the present invention, wherein R, RL and R N Each occurrence is either identical or different from the group consisting of the following structures:

[0186]

[0187]

[0188]

[0189]

[0190]

[0191]

[0192]

[0193]

[0194]

[0195]

[0196]

[0197]

[0198]

[0199] ;

[0200] In the above structure, Ph represents phenyl;

[0201] Wherein, “﹋” represents R with the above structure and Equation 1, and “﹋” also represents R with the above structure. L The connection position with L; “﹋” also indicates that when W is selected from NR N When, the R having the above structure N The connection position with N.

[0202] According to one embodiment of the invention, the two Rs in a first compound represented by Formula 1 are identical.

[0203] According to one embodiment of the present invention, the first compound is selected from the group consisting of compounds I-1 to I-162, compounds II-1 to II-156, compounds III-1 to III-156, compounds IV-1 to IV-156, compounds V-1 to V-156, compounds VI-1 to VI-156, compounds VII-1 to VII-156, compounds VIII-1 to VIII-156, compounds IX-1 to IX-156, compounds X-1 to X-156, compounds XI-1 to XI-156, compounds XII-1 to XII-156, compounds XIII-1 to XIII-156, compounds XIV-1 to XIV-156, compounds XV-1 to XV-156, and compounds XVI-1 to XVI-156. The specific structures of compounds I-1 to I-162, II-1 to II-156, III-1 to III-156, IV-1 to IV-156, V-1 to V-156, VI-1 to VI-156, VII-1 to VII-156, VIII-1 to VIII-156, IX-1 to IX-156, X-1 to X-156, XI-1 to XI-156, XII-1 to XII-156, XIII-1 to XIII-156, XIV-1 to XIV-156, XV-1 to XV-156, and XVI-1 to XVI-156 are given in claim 15.

[0204] According to one embodiment of the present invention, the second compound is a monoaryl amine compound.

[0205] According to one embodiment of the present invention, in Formula 2, Q is selected from C or Si.

[0206] According to one embodiment of the present invention, in Formula 2, Q is selected from C.

[0207] According to one embodiment of the present invention, the second compound has a structure represented by any one of formulas 2-1 to 2-12:

[0208] , , , , , , , , , , , ,

[0209] In Equations 2-1 to 2-12, X1 to X8 are selected from CR3 or N each time they appear, either the same or different.

[0210] R x It has the following structure: ;

[0211] Among them, L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof;

[0212] Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms;

[0213] R1, R2, and R3, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms.

[0214] Adjacent substituents R1, R2, and R3 can optionally connect to form a ring.

[0215] According to one embodiment of the present invention, the second compound has a structure represented by formula 2-2, formula 2-3, formula 2-6, formula 2-7 or formula 2-12.

[0216] According to one embodiment of the present invention, the second compound has a structure represented by formula 2-2.

[0217] According to one embodiment of the present invention, the second compound has a structure represented by Formula 3:

[0218] ;

[0219] In Equation 3, X1 to X8 are selected from CR3 and CR4 respectively each time they appear, either identically or differently. x Or N, at least one of X1 to X8 is selected from CR x ;X9 to X 16 Each time it appears, it is selected from CR in the same or different ways. 11 Or N; Q is selected from C, Si, or Ge;

[0220] The R x It has the following structure: ;

[0221] L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof;

[0222] Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms;

[0223] R3, R 11Each time it appears, it is selected from the group consisting of the same or different groups of the following: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, and substituted or unsubstituted alkyl groups having 1-20 carbon atoms. Alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms;

[0224] Adjacent substituents R3, R 11 They can be arbitrarily connected to form a ring.

[0225] In this paper, adjacent substituents R3, R 11 They can be optionally linked to form a ring, intended to represent adjacent substituent groups, for example, adjacent substituent R3, adjacent substituent R 11 and adjacent substituents R3 and R 11 Any one or more of these adjacent substituent groups can connect to form a ring. Obviously, these adjacent substituents can also remain unconnected to form a ring.

[0226] According to one embodiment of the present invention, in Formula 3, Q is selected from C or Si.

[0227] According to one embodiment of the present invention, in Formula 3, Q is selected from C.

[0228] According to one embodiment of the present invention, in formula 2 or formula 3, X1 to X8 are selected from CR3 or CR4 each time they appear, either identically or differently. x .

[0229] According to one embodiment of the present invention, in formula 2 or formula 3, at least one of X1 to X4 and / or X5 to X8 is selected from CR each time it appears, either identically or differently. x .

[0230] According to one embodiment of the present invention, in formula 2 or formula 3, one of X1 to X4 and / or one of X5 to X8 is selected from CR each time it appears, either identically or differently. x .

[0231] According to one embodiment of the present invention, in formula 2 or formula 3, X2 and / or X7 are selected from CR each time they appear, either identically or differently. x .

[0232] According to one embodiment of the present invention, the second compound has a structure represented by any one of formulas 3-1 to 3-12:

[0233] , , , , , , , , , , , ,

[0234] In equations 3-1 to 3-12,

[0235] X1 to X 16 Each occurrence is either identical or different and is selected from CR3 or N;

[0236] R x It has the following structure: ;

[0237] L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof;

[0238] Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms;

[0239] R3, R 11Each time it appears, it is selected from the group consisting of the same or different groups of the following: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, and substituted or unsubstituted alkyl groups having 1-20 carbon atoms. Alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms;

[0240] Adjacent substituents R3, R 11 They can be arbitrarily connected to form a ring.

[0241] According to one embodiment of the present invention, the second compound has a structure represented by formula 3-2, formula 3-3, formula 3-6, formula 3-7, formula 3-8 or formula 3-12.

[0242] According to one embodiment of the present invention, the second compound has a structure represented by formula 3-2.

[0243] According to one embodiment of the present invention, wherein the L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-24 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-24 carbon atoms, or combinations thereof.

[0244] According to one embodiment of the present invention, L xEach time it appears, it is selected from the same or different groups of single bond, substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, substituted or unsubstituted terphenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted fluorene, substituted or unsubstituted silylfluorene, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, substituted or unsubstituted dibenzoselenophene, substituted or unsubstituted phenanthylene, substituted or unsubstituted terphenylene, substituted or unsubstituted pyridylene, substituted or unsubstituted spirodifluorene, substituted or unsubstituted anthracene, substituted or unsubstituted pyrene, or combinations thereof.

[0245] According to one embodiment of the present invention, L x Each time it appears, choose the group consisting of the following, either the same or different:

[0246] , , , , , , , , , , , , , ;

[0247] "*" indicates that L-1 to L-13 are related to R x The positions of N-bonds already shown in the figure, "" indicates the position in L-1 to L-13 that is connected to C or Ar.

[0248] According to one embodiment of the present invention, Ar, each occurrence of which has the same or different structures represented by any one of Equations 4-1 to 4-4:

[0249] , , , ,

[0250] E is selected from O, S, Se, CR5R6, SiR5R6 or GeR5R6 each time it appears;

[0251] R4, when appearing in the same or different instances, indicates monosubstitution, polysubstitution, or no substitution.

[0252] R4, R5, and R6, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms.

[0253] Adjacent substituents R4, R5, and R6 can optionally connect to form a ring;

[0254] “ " indicates that the structure of Ar is related to L x The location of the connection.

[0255] According to one embodiment of the present invention, R4, R5 and R6 are selected, in the same or different ways, from hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, cyano groups, or combinations thereof.

[0256] According to one embodiment of the present invention, R4, R5 and R6 are selected from hydrogen, deuterium, fluorine, methyl, ethyl, isopropyl, 9,9-dimethylfluorene, phenyl, biphenyl, terphenyl, naphthyl, cyano, or combinations thereof each time they appear.

[0257] According to one embodiment of the present invention, Ar is selected from the group consisting of G1 to G33 each time it appears, either identically or differently:

[0258] , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , .

[0259] According to one embodiment of the invention, R3 is selected, in the same or different ways, from hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof.

[0260] According to one embodiment of the present invention, R3 is selected from hydrogen, deuterium, fluorine, methyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, 2-methylbutyl, n-pentyl, sec-pentyl, neopentyl, cyclopentyl, n-hexyl, neohexyl, cyclohexyl, n-heptyl, phenyl, biphenyl, terphenyl, naphthyl, 9,9-dimethylfluorenyl, or combinations thereof, each time it appears.

[0261] According to one embodiment of the present invention, the second compound is selected from the group consisting of compounds HT-1 to HT-240; the specific structures of compounds HT-1 to HT-240 are given in claim 24.

[0262] According to one embodiment of the present invention, the first organic layer is in direct contact with the anode, and the first organic layer is a hole injection layer.

[0263] According to one embodiment of the present invention, the molar doping ratio of the first compound to the second compound in the hole injection layer is from 10000:1 to 1:10000.

[0264] According to one embodiment of the present invention, the molar doping ratio of the first compound to the second compound in the hole injection layer is from 10:1 to 1:100.

[0265] According to one embodiment of the present invention, the organic electroluminescent device further comprises a second organic layer and at least one light-emitting layer, wherein the second organic layer is disposed between the first organic layer and the at least one light-emitting layer.

[0266] According to one embodiment of the present invention, the second organic layer comprises at least one compound comprising any one or more chemical structural units selected from the group consisting of: triarylamines, carbazole, fluorene, spirodifluorene, thiophene, furan, phenyl, oligomeric phenylene oxide, oligomeric fluorene, and combinations thereof.

[0267] According to one embodiment of the present invention, the second organic layer comprises the second compound.

[0268] According to one embodiment of the present invention, one side of the second organic layer is in direct contact with the first organic layer.

[0269] According to one embodiment of the present invention, one side of the second organic layer is in direct contact with the first organic layer, and the other side is in direct contact with the light-emitting layer.

[0270] According to one embodiment of the present invention, the thickness of the first organic layer is between 0.1 nm and 40 nm, and the thickness of the second organic layer is between 0.1 nm and 300 nm.

[0271] According to another embodiment of the present invention, a display component is also disclosed, which includes an organic electroluminescent device, wherein the specific structure of the organic electroluminescent device is as shown in any of the foregoing embodiments.

[0272] According to another embodiment of the present invention, a compound combination comprising a first compound and a second compound is also disclosed, wherein the first compound is as described in any of the foregoing embodiments, and the second compound is as described in any of the foregoing embodiments.

[0273] Combination with other materials

[0274] The materials described in this invention for specific layers in organic light-emitting devices can be used in combination with a variety of other materials present in the device. These combinations of materials are 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 herein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can readily consult the literature to identify other materials that can be used in combination.

[0275] Materials described herein for use in specific layers of organic light-emitting devices can be used in combination with a variety of other materials present in said devices. For example, the compounds disclosed herein can be used in combination with a variety of light-emitting dopants, substrates, transport layers, blocking layers, implantation layers, electrodes, and other possible layers. These combinations of materials are 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 herein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can readily consult the literature to identify other materials that can be used in combination.

[0276] The first and second compounds used in this invention can be obtained by referring to the preparation methods in the prior art, or by referring to the preparation method of patent application number CN202110716169.7, which will not be repeated here. In the embodiments of the device, the characteristics of the device are also tested using conventional equipment in the art (including but not limited to evaporation machines manufactured by Angstrom Engineering, optical testing systems and lifetime testing systems manufactured by Suzhou Fushida, ellipsometers manufactured by Beijing Liangtuo, etc.) using methods well known to those skilled in the art. Since those skilled in the art are familiar with the use of the above-mentioned equipment, testing methods, and other related content, and can obtain the inherent data of the sample definitively and unaffected, the above-mentioned related content will not be elaborated in this patent.

[0277] Device Examples

[0278] Example 1:

[0279] First, a 0.7 mm thick glass substrate with a pre-patterned 800 Å thick indium tin oxide (ITO) layer as the anode was used. 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 then placed in a support frame and transferred to the vacuum chamber. The organic layer specified below was applied at a vacuum degree of approximately 10... -6Under Torr conditions, the anode layer was sequentially deposited via vacuum thermal evaporation at a rate of 0.01–10 Å / s: First, compounds HT-110 and I-8 were simultaneously deposited as a hole injection layer (HIL, 98:2, 100 Å), and compound HT-110 was deposited as a hole transport layer (HTL, 200 Å). Next, compounds BH and BD were simultaneously deposited as an emissive layer (EML, 96:4, 250 Å). Compound HB was deposited as a hole blocking layer (HBL, 50 Å), compounds ET and Liq were co-deposited as an electron transport layer (ETL, 40:60, 300 Å), and a 10 Å thick layer of Liq was deposited as an electron injection layer (EIL). Finally, metallic aluminum was deposited as a cathode (Cathode, 1200 Å). The device was then transferred back to the glove box and sealed with a glass cover to complete the device.

[0280] Example 2:

[0281] Example 2 was implemented in the same manner as Example 1, except that the vapor-deposited compound HT-211 and compound I-8 were used as hole injection layers (HIL, 98:2, 100 Å), and the vapor-deposited compound HT-211 was used as a hole transport layer.

[0282] Example 3:

[0283] Example 3 was implemented in the same manner as Example 1, except that compound HT-110 and compound I-109 were vapor-deposited as hole injection layers (HIL, 98:2, 100 Å).

[0284] Example 4:

[0285] Example 4 was implemented in the same manner as Example 1, except that the vapor-deposited compounds HT-211 and I-109 were used as hole injection layers (HIL, 98:2, 100 Å), and the vapor-deposited compound HT-211 was used as a hole transport layer.

[0286] Comparative Example 1:

[0287] Comparative Example 1 was implemented in the same manner as Example 1, except that the vapor-deposited compounds HT and I-8 were used as hole injection layers (HIL, 98:2, 100 Å), and the vapor-deposited compound HT was used as a hole transport layer.

[0288] Comparative Example 2:

[0289] Comparative Example 2 was implemented in the same manner as Example 1, except that the vapor-deposited compounds HT and I-109 were used as hole injection layers (HIL, 98:2, 100 Å), and the vapor-deposited compound HT was used as a hole transport layer.

[0290] Comparative Example 3:

[0291] Comparative Example 3 was implemented in the same manner as Example 1, except that compound HT-110 and compound PD-1 were vapor-deposited as hole injection layers (HIL, 98:2, 100 Å).

[0292] Comparative Example 4:

[0293] Comparative Example 4 was implemented in the same manner as Example 1, except that the vapor-deposited compounds HT-211 and PD-1 were used as hole injection layers (HIL, 98:2, 100 Å), and the vapor-deposited compound HT-211 was used as a hole transport layer.

[0294] Comparative Example 5:

[0295] Comparative Example 5 was implemented in the same manner as Example 1, except that the vapor-deposited compounds HT and PD-1 were used as hole injection layers (HIL, 98:2, 100 Å), and the vapor-deposited compound HT was used as a hole transport layer.

[0296] The detailed device layer structure and thickness are shown in the table below. The layers use more than one material; they are obtained by doping different compounds in the stated weight ratios.

[0297] Table 1. Partial device structures of Examples 1-4 and Comparative Examples 1-5

[0298] Device Number HIL HTL EML HBL ETL Example 1 Compound HT-110: Compound I-8 (98:2) (100 Å) Compound HT-110 (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Example 2 Compound HT-211: Compound I-8 (98:2) (100 Å) Compound HT-211 (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Example 3 Compound HT-110: Compound I-109 (98:2)(100 Å) Compound HT-110 (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Example 4 Compound HT-211: Compound I-109 (98:2)(100 Å) Compound HT-211 (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Comparative Example 1 Compound HT: Compound I-8 (98:2)(100Å) Compound HT (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Comparative Example 2 Compound HT: Compound I-109 (98:2)(100Å) Compound HT (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Comparative Example 3 Compound HT-110: Compound PD-1 (98:2) (100 Å) Compound HT-110 (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Comparative Example 4 Compound HT-211: Compound PD-1 (98:2) (100 Å) Compound HT-211 (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å) Comparative Example 5 Compound HT: Compound PD-1(98:2)(100Å) Compound HT (200 Å) Compound BH: Compound BD (96:4) (250 Å) Compound HB (50Å) Compound ET:Liq (40:60) (300 Å)

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

[0300] , , , , , , , , , , .

[0301] The device performance of Examples 1-4 and Comparative Examples 1-5 was measured. Color coordinates (CIE), voltage (V), and power efficiency (PE) were measured at a current density of 10 mA / cm². 2 The lifetime (LT95) was measured under the condition of a current density of 80 mA / cm². 2 The data were measured under the specified conditions. These data were recorded and are shown in Table 2.

[0302] Table 2 Device Data

[0303] Device Number CIEx CIEy Voltage (V) PE (lm / W) LT95 (h) Example 1 0.136 0.103 4.1 5.7 137.0 Example 2 0.136 0.110 4.2 6.3 40.4 Example 3 0.136 0.103 4.1 5.7 145.0 Example 4 0.136 0.110 4.2 6.3 45.2 Comparative Example 1 0.136 0.106 5.1 3.9 1.0 Comparative Example 2 0.136 0.106 4.6 4.8 1.8 Comparative Example 3 0.137 0.106 5.9 4.4 4.0 Comparative Example 4 0.137 0.114 5.1 2.6 17.0 Comparative Example 5 0.138 0.111 6.0 1.6 3.7

[0304] Table 2 shows the test results of electroluminescent devices using different combinations of p-type conductive doped materials and hole transport materials. As can be seen from the color coordinates, the color coordinates of the shown examples are basically the same as those of the comparative examples.

[0305] Compared to Comparative Example 1, Example 1 showed a significant voltage reduction of 20%, an efficiency increase of 47%, and a lifetime increase of 136 times. Compared to Comparative Example 1, Example 2 showed a significant voltage reduction of 18%, an efficiency increase of 62%, and a lifetime increase of 39 times. Compared to Comparative Example 2, Example 3 showed a voltage reduction of 0.5 V (11%), an efficiency increase of 19%, and a lifetime increase of 80 times. Compared to Comparative Example 2, Example 4 showed a voltage reduction of 0.4 V (9%), an efficiency increase of 31%, and a lifetime increase of 24 times.

[0306] Compared to Comparative Example 3, Example 1 showed a voltage reduction of 1.8 V (31%), a 30% increase in efficiency, and a 33-fold increase in lifetime; Example 3 showed a voltage reduction of 1.8 V (31%), a 30% increase in efficiency, and a 35-fold increase in lifetime. Compared to Comparative Example 4, Example 2 showed a voltage reduction of 0.9 V (18%), a 142% increase in efficiency, and a 1.4-fold increase in lifetime; Example 4 showed a voltage reduction of 0.9 V (18%), a 142% increase in efficiency, and a 1.7-fold increase in lifetime.

[0307] The above comparison shows that when the first compound with the structure of Formula 1 and the second compound with the structure of Formula 2 are matched, the organic electroluminescent device prepared can achieve a significant performance improvement, which proves the excellent performance and unique advantages of the combination of the first compound and the second compound selected in this invention.

[0308] Furthermore, Comparative Examples 1, 2, and 5 all used the same compound HT in the HIL. Compared to Comparative Example 5, although the voltages of Comparative Examples 1 and 2 decreased by 0.9 V and 1.4 V, respectively, and the efficiencies increased by 144% and 200%, respectively, the lifetimes of Comparative Examples 1 and 2 decreased significantly, by 73% and 51%, respectively. This demonstrates that the combination of p-type conductive doped materials I-8 and I-109 with compound HT does not yield excellent device performance. However, in Examples 1-4, combining compounds I-8 and I-109 with compounds HT-110 and HT-211, respectively, not only reduced the device voltage and significantly improved the efficiency, but more importantly, also greatly enhanced the lifetime. This fully demonstrates the unexpectedly excellent performance of the combination of the first and second compounds selected in this invention, reflecting its great potential for commercial applications.

[0309] In summary, the organic electroluminescent device prepared by combining the first compound having Formula 1 with the second compound having Formula 2 exhibits significant performance improvement and has broad commercial prospects.

[0310] It should be understood that the various embodiments described herein are merely examples and are not intended to limit the scope of the 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 can be substituted with other materials and structures without departing from the spirit of the invention. It should be understood that various theories regarding why the invention works are not intended to be limiting.

Claims

1. An organic electroluminescent device, comprising: anode, cathode, and a first organic layer disposed between the anode and the cathode, wherein the first organic layer comprises at least a first compound and a second compound; The first compound has a structure represented by Formula 1: ； In Equation 1, Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different. L is selected from the same or different times each time it appears. ,or or any combination thereof; Cyclic AA is a conjugated structure of 4-30 ring atoms with at least one intracyclic double bond; n is an integer selected from 0 to 10, either identically or differently each time it appears; Y is, on each occurrence, identically or differently selected from the group consisting of CR L and N; Ring A is, on each occurrence, identically or differently, a 5-membered heterocycle, and said 5-membered heterocycle contains one endocyclic double bond, at least one N atom and at least one W; said W is, on each occurrence, identically or differently, selected from the group consisting of O, S, Se and NR N NR R and R L Each occurrence, whether identical or different, indicates monosubstitution, polysubstitution, or no substitution; R, R', R", R"', R L and R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alksilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof; Adjacent substituents R”, R”’ can optionally connect to form a ring; Adjacent substituents R, R L They can optionally connect to form a ring, and when adjacent substituents R L When the links form a ring, the resulting ring has at least four ring atoms; The second compound has a structure represented by Formula 2: ； In Equation 2, Q is selected from C, Si, or Ge; X1 to X8 are selected from CR3 or CR4 each time they appear, either identically or differently. x Or N, at least one of X1 to X8 is selected from CR x The R x It has the following structure: ; Among them, L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof; Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms; R1, R2, and R3, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms. Adjacent substituents R1, R2, and R3 can optionally connect to form a ring.

2. The organic electroluminescent device as described in claim 1, wherein, In Formula 1, ring A comprises an intracyclic double bond, an N atom, a W atom, and three carbon atoms.

3. The organic electroluminescent device as described in claim 1, wherein, In Equation 1, the connection between the two sides of L Each time it appears, select the group consisting of free equations 4, 5, 6, and 7, either the same or different: ； Among them, in equations 4 to 7, Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different. W is chosen freely from O, S, Se, and NR each time it appears, either the same or different. N The group formed; R, R', R", R"', R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alksilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof; "**" represents the connection position between Equations 4 to 7 and L in Equation 1.

4. The organic electroluminescent device as described in claim 1, wherein, In Equation 1, L is selected, either identically or differently, from the structure shown in Equation 8 or Equation 9, or a combination thereof: ， ； In Equation 8 or Equation 9, n is an integer selected from 0 to 10, either identically or differently each time it appears; Y and Z are selected from CR each time they appear, either the same or different. L Or N; R L Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphoxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted groups having 7- Arylalkyl groups with 30 carbon atoms, substituted or unsubstituted alkoxy groups with 1-20 carbon atoms, substituted or unsubstituted aryloxy groups with 6-30 carbon atoms, substituted or unsubstituted alkenyl groups with 2-20 carbon atoms, substituted or unsubstituted alkynyl groups with 2-20 carbon atoms, substituted or unsubstituted aryl groups with 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3-30 carbon atoms, substituted or unsubstituted alksilyl groups with 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6-20 carbon atoms, and combinations thereof; Adjacent substituent R L They can be optionally linked to form rings containing four or more ring atoms; "#" and "##" represent the connection positions of Equation 8 or Equation 9 with ring A or L in Equation 1.

5. The organic electroluminescent device as described in claim 1, wherein, In the first compound, L is... n is 0, and the first compound has a structure represented by any one of formulas I to XVI: ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ； Among them, in equations I to XVI, Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different. W is chosen freely from O, S, Se, and NR each time it appears, either the same or different. N The group formed; R, R', R", R"', R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof.

6. The organic electroluminescent device as described in claim 5, wherein, The first compound has a structure represented by one of formulas I, II, V, IX, X, XI, and XVI.

7. The organic electroluminescent device of claim 1, wherein X is selected from CR''R''' each time it appears.

8. The organic electroluminescent device of claim 1, wherein the W is selected from O, S or Se each time it appears.

9. The organic electroluminescent device of claim 8, wherein the W is selected from O or S each time it appears, either the same or different.

10. The organic electroluminescent device of claim 8, wherein W is O.

11. The organic electroluminescent device as claimed in claim 1, wherein, In Formula 1, the substituents R, R', R”, R”', R L and R N At least one of them is a group having at least one electron-withdrawing group.

12. The organic electroluminescent device as claimed in claim 11, wherein, In Formula 1, the substituents R, R', R'', R'', and R''' are... L At least one of them is a group having at least one electron-withdrawing group.

13. The organic electroluminescent device of claim 11, wherein R, each time it appears, is selected from substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof.

14. The organic electroluminescent device of claim 13, wherein R, each time it appears, is selected from aryl groups having 6-30 carbon atoms substituted with at least one electron-withdrawing group, heteroaryl groups having 3-30 carbon atoms substituted with at least one electron-withdrawing group, or combinations thereof.

15. The organic electroluminescent device as claimed in claim 11, wherein, The Hammett constant of the electron-withdrawing group is ≥0.

05.

16. The organic electroluminescent device as claimed in claim 15, wherein, The Hammett constant of the electron-withdrawing group is ≥0.

3.

17. The organic electroluminescent device as claimed in claim 15, wherein, The Hammett constant of the electron-withdrawing group is ≥0.

5.

18. The organic electroluminescent device as claimed in claim 15, 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, phosphoxy, azirane, and any of the following groups substituted by one or more of halogen, nitroso, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphoxy, azirane, having 1-20 carbon atoms. Alkyl groups, cycloalkyl groups having 3-20 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, alksilyl groups having 3-20 carbon atoms, arylsilyl groups having 6-20 carbon atoms, and combinations thereof.

19. The organic electroluminescent device as claimed in claim 18, 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.

20. The organic electroluminescent device of claim 1, wherein X, each time it appears, is selected from the group consisting of the following structures, either identically or differently: O, S, Se, , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , , in, V, U, and T are selected from CR each time they appear, either the same or different. v R u NR v The group consists of O, S and Se; Ar1 is selected, either identically or differently, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms. Among them, R a R b R c R v and R u Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phospho, substituted or unsubstituted alkyl with 1-20 carbon atoms, substituted or unsubstituted cycloalkyl with 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl with 1-20 carbon atoms, substituted or unsubstituted heterocyclic with 3-20 ring atoms, substituted or unsubstituted with 7-30 carbon atoms. Aryl groups of atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aryloxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alksilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, and combinations thereof; Adjacent substituent R a R b R c R v and R u They can be arbitrarily connected to form a loop; Among them, R c It is a group having at least one electron-withdrawing group, and for any of the above structures, when R b R v and R u When one or more of them appear, at least one of them is a group having at least one electron-withdrawing group.

21. The organic electroluminescent device as claimed in claim 20, wherein, R a Each time it appears, it is selected from the group consisting of the following, either the same or different: F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, pentafluorophenyl, 4-cyanotetrafluorophenyl, tetrafluoropyridyl, pyrimidinyl, triazine, and combinations thereof.

22. The organic electroluminescent device as claimed in claim 20, wherein, The group having at least one electron-withdrawing group is selected from the group consisting of: F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, pentafluorophenyl, 4-cyanotetrafluorophenyl, tetrafluoropyridyl, pyrimidinyl, triazine, and combinations thereof.

23. The organic electroluminescent device as claimed in claim 20, wherein, Each time X appears, it is selected from the group consisting of the following structures, either identically or differently: O, S, Se, , , , , , , 。 24. The organic electroluminescent device as claimed in claim 20, wherein, X is selected from .

25. The organic electroluminescent device as claimed in claim 1, wherein, The R, R L and R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphoxy, hydroxyl, mercapto, substituted or unsubstituted alkyl with 1-20 carbon atoms, substituted or unsubstituted cycloalkyl with 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl with 1-20 carbon atoms, substituted or unsubstituted heterocyclic with 3-20 ring atoms, substituted or unsubstituted with 7-3 Arylalkyl groups with 0 carbon atoms, substituted or unsubstituted alkoxy groups with 1 to 20 carbon atoms, substituted or unsubstituted aryloxy groups with 6 to 30 carbon atoms, substituted or unsubstituted alkenyl groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alkoxysilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, and combinations thereof.

26. The organic electroluminescent device as claimed in claim 25, wherein, The R, R L and R N Each time it appears, it is selected from the group consisting of the following, either identically or differently: hydrogen, deuterium, methyl, isopropyl, NO2, SO2CH3, SCF3, C2F5, OC2F5, diphenylmethylsilyl, phenyl, methoxyphenyl, p-methylphenyl, 2,6-diisopropylphenyl, biphenyl, polyfluorophenyl, difluoropyridyl, nitrophenyl, dimethylthiazolyl, CN, vinyl substituted with one or more of CN or CF3, ethynyl substituted with one of CN or CF3, dimethylphosphoxy, diphenylphosphoxy, F, CF3, OCF3, SF5, SO2CF3, cyano, isocyano, SCN, OCN, trifluoromethylphenyl, trifluoromethoxyphenyl, bis(trifluoromethyl)phenyl, bis(trifluoromethoxy)phenyl, 4-cyanotetrafluorophenyl, substituted with F, One or more substituted phenyl or biphenyl groups, tetrafluoropyridyl, pyrimidinyl, triazine, pyridyl, diphenylborane, oxaboranthyl, and combinations thereof, in CN or CF3.

27. The organic electroluminescent device as claimed in claim 23, wherein, The R, R L and R N Each occurrence is either identical or different from the group consisting of the following structures: ； ； ； ； ； ； ； ； ； ； ； ； ； ； ； 。 28. The organic electroluminescent device of claim 27, wherein the two Rs are identical in the first compound represented by formula 1.

29. The organic electroluminescent device of claim 27, wherein the first compound is selected from the group consisting of compounds I-1 to I-162, compounds II-1 to II-156, compounds III-1 to III-156, compounds IV-1 to IV-156, compounds V-1 to V-156, compounds VI-1 to VI-156, compounds VII-1 to VII-156, compounds VIII-1 to VIII-156, compounds IX-1 to IX-156, compounds X-1 to X-156, compounds XI-1 to XI-156, compounds XII-1 to XII-156, compounds XIII-1 to XIII-156, compounds XIV-1 to XIV-156, compounds XV-1 to XV-156, and compounds XVI-1 to XVI-156. in, Compounds I-1 to I-162 have the structure of Formula I: ； In Formula I, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds II-1 to II-156 have the structure of formula II: ； In Formula II, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds III-1 to III-156 have the structure of formula III: ； In Formula III, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds IV-1 to IV-156 have the structure of formula IV: ； In Formula IV, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds V-1 to V-156 have the structure of formula V: ； In formula V, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds VI-1 to VI-156 have the structure of formula VI: ； In Formula VI, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds VII-1 to VII-156 have the structure of formula VII: ； In Formula VII, the two X's are the same, the two W's are the same, the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds VIII-1 to VIII-156 have the structure of formula VIII: ； In formula VIII, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds IX-1 to IX-156 have the structure of formula IX: ； In formula IX, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds X-1 to X-156 have the structure of formula X: ； In formula X, the two X's are the same, the two W's are the same, the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds XI-1 to XI-156 have the structure of formula XI: ； In formula XI, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds XII-1 to XII-156 have the structure of formula XII: ； In formula XII, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds XIII-1 to XIII-156 have the structure of formula XIII: ； In formula XIII, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds XIV-1 to XIV-156 have the structure of formula XIV: ； In formula XIV, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds XV-1 to XV-156 have the structure of formula XV: ； In formula XV, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: ； Among them, compounds XVI-1 to XVI-156 have the structure of formula XVI: ； In formula XVI, the two X's are the same, the two W's are the same, and the two R's are the same, and X, W, and R correspond to atoms or groups selected from the table below: 。 30. The organic electroluminescent device as claimed in claim 1, wherein, Q is selected from C and Si.

31. The organic electroluminescent device as claimed in claim 1, wherein, Q is selected from C.

32. The organic electroluminescent device as claimed in claim 1, wherein, The second compound has a structure represented by any one of formulas 2-1 to 2-13: ， ， ， ， ， ， ， ， ， ， ， ， ， In Equations 2-1 to 2-13, X1 to X8 are selected from CR3 or N each time they appear, either the same or different. R x It has the following structure: ; Among them, L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof; Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms; R1, R2, and R3, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms. Adjacent substituents R1, R2, and R3 can optionally connect to form a ring.

33. The organic electroluminescent device as described in claim 32, wherein, The second compound has a structure represented by formula 2-2, formula 2-3, formula 2-6, formula 2-7 or formula 2-12.

34. The organic electroluminescent device as claimed in claim 1, wherein, The second compound has a structure represented by Formula 3: ； In Equation 3, X1 to X8 are selected from CR3 and CR4 respectively each time they appear, either identically or differently. x Or N, at least one of X1 to X8 is selected from CR x ;X9 to X 16 Each time it appears, it is selected from CR in the same or different ways. 11 Or N; R x It has the following structure: ; L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof; Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms; Q is selected from C, Si, or Ge; R3, R 11 Each time it appears, it is selected from the group consisting of the same or different groups of the following: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, and substituted or unsubstituted alkyl groups having 1-20 carbon atoms. Alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms; Adjacent substituents R3, R 11 They can be arbitrarily connected to form a ring.

35. The organic electroluminescent device as described in claim 34, wherein, Q is selected from C or Si.

36. The organic electroluminescent device as described in claim 34, wherein, In Equation 3, at least one of X1 to X4 and / or X5 to X8 is selected from CR each time it appears, either identically or differently. x .

37. The organic electroluminescent device as claimed in claim 36, wherein, In Equation 3, X1 to X4 and / or one of X5 to X8 are selected from CR each time they appear, either identically or differently. x .

38. The organic electroluminescent device as described in claim 36, wherein, In Equation 3, X2 and / or X7 are selected from CR each time they appear, either identically or differently. x .

39. The organic electroluminescent device as described in claim 34, wherein, The second compound has a structure represented by any one of formulas 3-1 to 3-13: ， ， ， ， ， ， ， ， ， ， ， ， ， In equations 3-1 to 3-13, X1 to X8 are selected from CR3 or N each time they appear, either identically or differently; X9 to X 16 Each time it appears, it is selected from CR in the same or different ways. 11 Or N; R x It has the following structure: ; L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof; Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms; R3, R 11 Each time it appears, it is selected from the group consisting of the same or different groups of the following: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, and substituted or unsubstituted alkyl groups having 1-20 carbon atoms. Alkynyl groups having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms; Adjacent substituents R3, R 11 They can be arbitrarily connected to form a ring.

40. The organic electroluminescent device as claimed in claim 39, wherein, The second compound has a structure represented by formula 3-2, formula 3-3, formula 3-6, formula 3-7, formula 3-8 or formula 3-12.

41. The organic electroluminescent device as claimed in claim 1, wherein, The L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-24 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-24 carbon atoms, or combinations thereof.

42. The organic electroluminescent device as claimed in claim 41, wherein, L x Each time it appears, it is selected from the same or different groups of single bond, substituted or unsubstituted phenylene, substituted or unsubstituted biphenylene, substituted or unsubstituted terphenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted fluorene, substituted or unsubstituted silylfluorene, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophene, substituted or unsubstituted dibenzoselenophene, substituted or unsubstituted phenanthylene, substituted or unsubstituted terphenylene, substituted or unsubstituted pyridylene, substituted or unsubstituted spirodifluorene, substituted or unsubstituted anthracene, substituted or unsubstituted pyrene, or combinations thereof.

43. The organic electroluminescent device as claimed in claim 41, wherein, L x Each time it appears, choose the group consisting of the following, either the same or different: ， ， ， ， ， ， ， ， ， ， ， ， ， ； "*" indicates that L-1 to L-13 are related to R. x The positions of N-bonds have been shown in the figure. "" indicates the position in L-1 to L-13 that is connected to C or Ar.

44. The organic electroluminescent device as claimed in claim 1, wherein Ar, each occurrence, has the same or different structures represented by any one of Equations 4-1 to 4-4: ， ， ， ， E is selected from O, S, Se, CR5R6, SiR5R6 or GeR5R6 each time it appears; R4, when appearing in the same or different instances, indicates monosubstitution, polysubstitution, or no substitution. R4, R5, and R6, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms. Adjacent substituents R4, R5, and R6 can optionally connect to form a ring.

45. The organic electroluminescent device as described in claim 44, wherein, R4, R5, and R6, each time appearing, are selected from hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, cyano groups, or combinations thereof.

46. ​​The organic electroluminescent device as claimed in claim 44, wherein, R4, R5, and R6, each time appearing, are selected from hydrogen, deuterium, fluorine, methyl, ethyl, isopropyl, 9,9-dimethylfluorenyl, phenyl, biphenyl, terphenyl, naphthyl, cyano, or combinations thereof.

47. The organic electroluminescent device as claimed in claim 39, wherein, R3, each time appearing, is selected from hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof.

48. The organic electroluminescent device as claimed in claim 47, wherein, R3, each time appearing, is selected from hydrogen, deuterium, fluorine, methyl, n-propyl, isopropyl, n-butyl, isobutyl, sec-butyl, tert-butyl, 2-methylbutyl, n-pentyl, sec-pentyl, neopentyl, cyclopentyl, n-hexyl, neohexyl, cyclohexyl, n-heptyl, phenyl, biphenyl, terphenyl, naphthyl, 9,9-dimethylfluorenyl, or combinations thereof.

49. The organic electroluminescent device as claimed in claim 1, wherein, The second compound is selected from the group consisting of the following structures: ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， ， 。 50. The organic electroluminescent device as claimed in claim 1, wherein, The first organic layer is in direct contact with the anode, and the first organic layer is a hole injection layer.

51. The organic electroluminescent device as described in claim 50, wherein, The molar doping ratio of the first compound to the second compound in the hole injection layer ranges from 10000:1 to 1:10000.

52. The organic electroluminescent device as described in claim 50, wherein, The molar doping ratio of the first compound to the second compound ranges from 10:1 to 1:

100.

53. The organic electroluminescent device as claimed in claim 1, wherein, The organic electroluminescent device further includes a second organic layer and at least one light-emitting layer, wherein the second organic layer is disposed between the first organic layer and the at least one light-emitting layer.

54. The organic electroluminescent device as described in claim 53, wherein, The second organic layer comprises at least one compound comprising any one or more chemical structural units selected from the group consisting of: triarylamines, carbazole, fluorene, spirodifluorene, thiophene, furan, phenyl, oligomeric phenylene oxide, oligomeric fluorene, and combinations thereof.

55. The organic electroluminescent device as described in claim 53, wherein, The second organic layer contains the second compound.

56. A display component comprising an organic electroluminescent device as claimed in any one of claims 1-55.

57. A compound combination comprising a first compound and a second compound, wherein the first compound has a structure represented by Formula 1: ； In Equation 1, Each time X appears, it is selected from the group consisting of O, S, Se, NR' and CR"R"', either the same or different. L is selected from the same or different times each time it appears. ,or or any combination thereof; Cyclic AA is a conjugated structure of 4-30 ring atoms with at least one intracyclic double bond; n is an integer selected from 0 to 10, either identically or differently each time it appears; Y is selected freely by CR each time it appears, either the same or different. L A group consisting of N; Ring A, each time it appears, is a 5-membered heterocycle, and the 5-membered heterocycle contains an intracyclic double bond, at least one nitrogen atom, and at least one w atom; the w atom, each time it appears, is selected from O, S, Se, and NR. N The group formed; R and R L Each occurrence, whether identical or different, indicates monosubstitution, polysubstitution, or no substitution; R, R', R", R"', R L and R N Each time it appears, it is selected from the group consisting of the following groups, either identically or differently: hydrogen, deuterium, halogen, nitrosyl, nitro, acyl, carbonyl, carboxylic acid, ester, cyano, isocyanate, SCN, OCN, SF5, borane, sulfinyl, sulfonyl, phosphooxy, hydroxyl, mercapto, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 ring atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted groups having 1-20 carbon atoms. Alkoxy groups with 6 to 30 carbon atoms, substituted or unsubstituted aryloxy groups with 2 to 20 carbon atoms, substituted or unsubstituted alkynyl groups with 2 to 20 carbon atoms, substituted or unsubstituted aryl groups with 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl groups with 3 to 30 carbon atoms, substituted or unsubstituted alksilyl groups with 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl groups with 6 to 20 carbon atoms, substituted or unsubstituted alkylgermanium groups with 3 to 20 carbon atoms, substituted or unsubstituted arylgermanium groups with 6 to 20 carbon atoms, and combinations thereof; Adjacent substituents R”, R”’ can optionally connect to form a ring; Adjacent substituents R, R L They can optionally connect to form a ring, and when adjacent substituents R L When the links form a ring, the resulting ring has at least four ring atoms; The second compound has a structure represented by Formula 2: ； In Equation 2, Q is selected from C, Si, or Ge; X1 to X8 are selected from CR3 or CR4 each time they appear, either identically or differently. x Or N, at least one of X1 to X8 is selected from CR x ;R x It has the following structure: ; in, L x Each time it appears, it is selected from single bonds, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, or combinations thereof; Ar is selected, in the same or different ways, from substituted or unsubstituted aryl groups having 6-30 carbon atoms, or from substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms; R1, R2, and R3, each time appearing, are selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl groups having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl groups having 3-20 cyclic carbon atoms, substituted or unsubstituted heteroalkyl groups having 1-20 carbon atoms, substituted or unsubstituted heterocyclic groups having 3-20 cyclic carbon atoms, substituted or unsubstituted aralkyl groups having 7-30 carbon atoms, substituted or unsubstituted alkoxy groups having 1-20 carbon atoms, substituted or unsubstituted aroxy groups having 6-30 carbon atoms, substituted or unsubstituted alkenyl groups having 2-20 carbon atoms, substituted or unsubstituted alkenyl groups, etc. The following are substituted alkynes having 2-20 carbon atoms, substituted or unsubstituted aryl groups having 6-30 carbon atoms, substituted or unsubstituted heteroaryl groups having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl groups having 3-20 carbon atoms, substituted or unsubstituted arylsilyl groups having 6-20 carbon atoms, substituted or unsubstituted alkylgermanium groups having 3-20 carbon atoms, substituted or unsubstituted arylgermanium groups having 6-20 carbon atoms, and substituted or unsubstituted amino, acyl, carbonyl, carboxylic acid, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphinyl, and combinations thereof having 0-20 carbon atoms. Adjacent substituents R1, R2, and R3 can optionally connect to form a ring.

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