Organic electroluminescent material and device thereof

Abstract

The invention discloses an organic electroluminescent material and a device thereof. The organic electroluminescent material is a compound with a structure shown in a formula 1 and can be used as a main body material in an organic electroluminescent device, and the novel compounds can provide better device performance, for example, the service life is greatly prolonged unexpectedly while high efficiency is maintained. Also disclosed are an organic electroluminescent device, a compound composition, and an electronic device comprising the compound.

Description

Technical Field

[0001] The present invention relates to compounds for use in organic electronic devices, such as organic light emitting devices. More particularly, it relates to a compound having the structure of Formula 1, and an organic electroluminescent device, a compound composition and an electronic device comprising the compound. Background Art

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

[0003] In 1987, Tang and Van Slyke of Eastman Kodak reported a bilayer organic electroluminescent device which included an arylamine hole transport layer and a tris-8-hydroxyquinoline-aluminum layer as an electron transport layer and a light emitting layer (Applied Physics Letters, 1987, 51(12): 913-915). Once a bias voltage was applied to the device, green light was emitted from the device. This invention laid the foundation for the development of modern organic light emitting diodes (OLEDs). The 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 light emitting layers between a cathode and an anode. Since OLEDs are a self-luminous solid state device, they offer great potential for display and lighting applications. In addition, the inherent properties of organic materials, such as their flexibility, can make them very suitable for special applications, such as fabrication on flexible substrates.

[0004] OLEDs can be classified into three different types according to their light-emitting mechanisms. The OLED invented by Tang and van Slyke is a fluorescent OLED. It only uses singlet emission. The triplets generated in the device are wasted through non-radiative decay channels. Therefore, the internal quantum efficiency (IQE) of fluorescent OLEDs is only 25%. This limitation has hindered the commercialization of OLEDs. In 1997, Forrest and Thompson reported phosphorescent OLEDs, which use triplet emission from heavy metals in complexes as emitters. Therefore, it is able to harvest both singlet and triplet states, achieving 100% IQE. Due to its high efficiency, the discovery and development of phosphorescent OLEDs have directly contributed to the commercialization of active-matrix OLEDs (AMOLEDs). Recently, Adachi achieved high efficiency through thermally activated delayed fluorescence (TADF) of organic compounds. These emitters have a small singlet-triplet gap, making it possible for excitons to return from 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 and polymer OLEDs according to the form of the materials used. Small molecules refer to any organic or organometallic materials that are not polymers. As long as they have a precise structure, the molecular weight of small molecules can be very large. Dendrimers with a well-defined structure are considered small molecules. Polymer OLEDs include conjugated polymers and non-conjugated polymers with side-chain light-emitting groups. If post-polymerization occurs during the manufacturing process, small molecule OLEDs can turn into polymer OLEDs.

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

[0007] The emission color of OLEDs can be achieved through the structural design of the light-emitting materials. OLEDs can include one or more light-emitting layers to achieve the desired spectrum. For green, yellow, and red OLEDs, phosphorescent materials have been successfully commercialized. Blue phosphorescent devices still have problems such as blue color unsaturation, short device lifetime, and high operating voltage. Commercial full-color OLED displays usually adopt a hybrid strategy, using blue fluorescence and phosphorescent yellow, or red and green. Currently, the rapid reduction of the efficiency of phosphorescent OLEDs at high brightness is still a problem. In addition, it is desirable to have a more saturated emission spectrum, higher efficiency, and longer device lifetime.

[0008] CN108623545A discloses a compound having the following general formula A structure, wherein any one of R1, R2, R3, and R4 is R9 and R 10 is hydrogen, or R9 and R 10 together form a substituted five-membered ring, and its specific structure is disclosed a structure, which focuses on that the substituents on the arylamine must be two biphenyls or one is biphenyl and the other is fluorene or spirofluorene-like structures, and does not disclose and teach compounds connecting a triarylamine with a naphthylphenyl fragment and its similar structures.

[0009] US20230129535A1 discloses a compound having the following general formula

[0010] a structure, and although it also discloses a device, which further contains a second host compound having the general formula the specific structure of the second host compound is disclosed but it focuses on the improvement of triazine compounds and does not pay attention to the unique properties of compounds in which a triarylamine connecting a naphthylphenyl fragment is further connected to the 7-position of dibenzofuran and its similar structures.

[0011] However, there is still room for improvement in the reported host materials at present. To meet the increasing demands in the industry, especially for high efficiency and longer device lifetime performance, new materials still need to be further researched and developed. SUMMARY OF THE INVENTION

[0012] The present invention aims to provide a series of compounds having the structure of Formula 1 to solve at least part of the above problems. The compounds can be used as host materials in organic electroluminescent devices. These new compounds can maintain high efficiency in the devices, and at the same time, the lifetime is unexpectedly greatly improved, providing better device performance.

[0013] According to an embodiment of the present invention, a compound having the structure of Formula 1 is disclosed:

[0014]

[0015] Wherein,

[0016] Z1 and Z2 are each independently selected from O, S, SiRR, Se or CRR; when two Rs are present, the two Rs are the same or different;

[0017] X1 to X4, X8 to X 11 are the same or different each time they appear and are selected from C, N or CR x , and one of X1 to X4 is C and is connected to L2, and one of X8 to X 11 is C and is connected to L2;

[0018] X5 to X7, X 12 to X 15 is the same as or different from N or CR each time it appears x ;

[0019] Y1 to Y9 is the same as or different from C, N or CR each time it appears y ;

[0020] Y 10 to Y 13 is the same as or different from N or CR each time it appears y ;

[0021] L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted arylene having 6 - 30 carbon atoms, a substituted or unsubstituted heteroarylene having 3 - 30 carbon atoms, or a combination thereof;

[0022] Ar is selected from a substituted or unsubstituted aryl having 6 - 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, or a combination thereof;

[0023] R, R x , R y is the same as or different from each other and is selected from the group consisting of: hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl having 1 - 20 carbon atoms, a substituted or unsubstituted cycloalkyl having 3 - 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl having 1 - 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 - 20 ring atoms, a substituted or unsubstituted aralkyl having 7 - 30 carbon atoms, a substituted or unsubstituted alkoxy having 1 - 20 carbon atoms, a substituted or unsubstituted aryloxy having 6 - 30 carbon atoms, a substituted or unsubstituted alkenyl having 2 - 20 carbon atoms, a substituted or unsubstituted alkynyl having 2 - 20 carbon atoms, a substituted or unsubstituted aryl having 6 - 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, a substituted or unsubstituted alkylsilyl having 3 - 20 carbon atoms, a substituted or unsubstituted arylsilyl having 6 - 20 carbon atoms, a substituted or unsubstituted alkylgermyl having 3 - 20 carbon atoms, a substituted or unsubstituted arylgermyl having 6 - 20 carbon atoms, a substituted or unsubstituted amino having 0 - 20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof.

[0024] According to another embodiment of the present invention, an organic electroluminescent device is also disclosed, which includes an anode, a cathode, and an organic layer disposed between the anode and the cathode. The organic layer contains a compound having the structure of Formula 1, and the specific structure of the compound is as shown in the foregoing embodiments.

[0025] According to another embodiment of the present invention, a compound composition is also disclosed, which contains a compound having the structure of Formula 1, and the specific structure of the compound is as shown in the foregoing embodiments.

[0026] According to another embodiment of the present invention, an electronic device is also disclosed, which contains an organic electroluminescent device, and the specific structure of the organic electroluminescent device is as shown in the foregoing embodiments.

[0027] The novel compounds having the structure of Formula 1 disclosed in the present invention can be used as host materials in electroluminescent devices. These novel compounds can maintain high current efficiency, high power efficiency, and high external quantum efficiency in the devices, and at the same time, the lifetime is unexpectedly greatly improved, providing better device performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 FIG. is a schematic diagram of an organic light-emitting device that may contain the compounds and compound compositions disclosed herein.

[0029] Figure 2 FIG. is a schematic diagram of another organic light-emitting device that may contain the compounds and compound compositions disclosed herein. DETAILED DESCRIPTION

[0030] OLEDs can be fabricated on various substrates, such as glass, plastic, and metal. Figure 1 An organic light-emitting device 100 is schematically and non-limitingly shown. The figures are not necessarily drawn to scale, and some layer structures in the figures may also be omitted as needed. The device 100 may include a substrate 101, an anode 110, a hole injection layer 120, a hole transport layer 130, an electron blocking layer 140, a light-emitting layer 150, a hole blocking layer 160, an electron transport layer 170, an electron injection layer 180, and a cathode 190. The device 100 can be fabricated by sequentially depositing the described layers. The properties and functions of each layer and exemplary materials are described in more detail in columns 6-10 of US Patent US7,279,704B2, and the entire content of the above patent is incorporated herein by reference.

[0031] Each of these layers has more examples. For example, U.S. Patent No. 5,844,363, incorporated herein by reference in its entirety, discloses a flexible and transparent substrate-anode combination. 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, incorporated herein by reference in its entirety. Examples of host materials are disclosed in U.S. Patent No. 6,303,238, issued to Thompson et al., 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, incorporated herein by reference in its entirety. U.S. Patents Nos. 5,703,436 and 5,707,745, incorporated herein by reference in their entireties, disclose examples of cathodes including a composite cathode having a thin layer of a metal such as Mg:Ag and an overlying transparent, conductive, sputter-deposited ITO layer. The principles and use of a blocking layer are described in more detail in U.S. Patent No. 6,097,147 and U.S. Patent Application Publication No. 2003 / 0230980, incorporated herein by reference in their entireties. Examples of an injection layer are provided in U.S. Patent Application Publication No. 2004 / 0174116, incorporated herein by reference in its entirety. A description of a protective layer can be found in U.S. Patent Application Publication No. 2004 / 0174116, incorporated herein by reference in its entirety.

[0032] The above-described layered structure is provided by way of non-limiting examples. The functions of the OLED can be achieved by combining the various layers described above, or some layers can be completely omitted. It can also include other layers not explicitly described. Within each layer, a single material or a mixture of multiple materials can be used to achieve optimal performance. Any functional layer can include several sub-layers. For example, the light-emitting layer can have two different light-emitting materials to achieve a desired emission spectrum.

[0033] In one embodiment, the OLED can be described as having an "organic layer" disposed between the cathode and the anode. The organic layer can include one or more layers.

[0034] The OLED also requires a encapsulation layer, as Figure 2 Schematically and non-limitingly shows an organic light-emitting device 200, which is associated with Figure 1In contrast, a encapsulation layer 102 may also be included on the cathode 190 to prevent harmful substances from the environment, such as moisture and oxygen. Any material capable of providing an encapsulation function 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 US7,968,146B2, the entire content of which is incorporated herein by reference.

[0035] Devices manufactured in accordance with embodiments of the present invention can be incorporated into a variety of consumer products having one or more electronic component modules (or units) with the device. Some examples of these consumer products include flat panel displays, monitors, medical monitors, televisions, billboards, lights for indoor or outdoor illumination and / or signaling, head-up displays, fully or partially transparent displays, flexible displays, smart phones, tablet computers, phablets, wearable devices, smart watches, laptop computers, digital cameras, portable video cameras, viewfinders, microdisplays, 3-D displays, vehicle displays, and taillights.

[0036] The materials and structures described herein can also be used in other organic electronic devices listed above.

[0037] As used herein, "top" means furthest from the substrate, and "bottom" means closest to the substrate. In the case where a first layer is described as "disposed" "on" a second layer, the first layer is disposed further from the substrate. Unless it is specified that the first layer "contacts" the second layer, other layers may be present between the first and second layers. For example, even though there are various organic layers between the cathode and the anode, the cathode can still be described as "disposed on" the anode.

[0038] As used herein, "solution processable" means capable of being dissolved, dispersed, or transported in a liquid medium in the form of a solution or suspension and / or deposited from a liquid medium.

[0039] When a ligand is believed to directly contribute to the photosensitive properties of an emissive material, the ligand can be referred to as "photosensitive". When a ligand is believed not to contribute to the photosensitive properties of an emissive material, the ligand can be referred to as "auxiliary", but an auxiliary ligand can modify the properties of a photosensitive ligand.

[0040] It is believed that the internal quantum efficiency (IQE) of a fluorescent OLED can exceed the 25% spin statistical limit by delayed fluorescence. Delayed fluorescence can generally be divided into two types, namely P-type delayed fluorescence and E-type delayed fluorescence. P-type delayed fluorescence is generated by triplet-triplet annihilation (TTA).

[0041] On the other hand, E-type delayed fluorescence does not rely on the collision of two triplets but on the conversion between the triplet state and the singlet excited state. Compounds capable of generating E-type delayed fluorescence need to have an extremely small singlet-triplet gap for the energy state conversion. Thermal energy can activate the transition from the triplet state back to the singlet state. This type of delayed fluorescence is also called thermally activated delayed fluorescence (TADF). A remarkable feature of TADF is that the delayed component increases with the increase in temperature. If the rate of reverse intersystem crossing (RISC) is fast enough to minimize the non-radiative decay of the triplet state, the fraction of the singlet excited state refilled may reach 75%. The total singlet fraction can be 100%, far exceeding the 25% of the spin statistics of electro-generated excitons.

[0042] The characteristics of E-type delayed fluorescence can be seen in exciplex systems or single compounds. Without being bound by theory, it is believed that E-type delayed fluorescence requires the luminescent material to have a small singlet-triplet energy gap (ΔE S-T ). Organic non-metal-containing donor-acceptor luminescent materials may be able to achieve this. The emission of these materials is usually characterized as donor-acceptor charge transfer (CT) type emission. The spatial separation of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO) in these donor-acceptor type compounds usually results in a small ΔE S-T . These states can include CT states. Generally, donor-acceptor luminescent materials are constructed by connecting an electron donor moiety (such as an amino or carbazole derivative) to an electron acceptor moiety (such as an N-containing six-membered aromatic ring).

[0043] Definition of substituent terms

[0044] Halogen or halide - as used herein, includes fluorine, chlorine, bromine, and iodine.

[0045] Alkyl - as used herein, includes straight-chain and branched-chain alkyls. The alkyl can be an alkyl having 1 to 20 carbon atoms, preferably an alkyl having 1 to 12 carbon atoms, more preferably an alkyl having 1 to 6 carbon atoms. Examples of alkyls include methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, n-hexyl, n-heptyl, n-octyl, n-nonyl, n-decyl, n-undecyl, n-dodecyl, n-tridecyl, n-tetradecyl, n-pentadecyl, n-hexadecyl, n-heptadecyl, n-octadecyl, neopentyl, 1-methylpentyl, 2-methylpentyl, 1-pentylhexyl, 1-butylpentyl, 1-heptyloctyl, 3-methylpentyl. Among the above, methyl, ethyl, propyl, isopropyl, n-butyl, sec-butyl, isobutyl, tert-butyl, n-pentyl, neopentyl, and n-hexyl are preferred. Additionally, the alkyl can be optionally substituted.

[0046] Cycloalkyl - as used herein, cycloalkyl includes cyclic alkyl groups. The cycloalkyl can be a cycloalkyl having 3 to 20 ring carbon atoms, preferably a cycloalkyl having 4 to 10 carbon atoms. Examples of cycloalkyl include cyclobutyl, cyclopentyl, cyclohexyl, 4 - methylcyclohexyl, 4,4 - dimethylcyclohexyl, 1 - adamantyl, 2 - adamantyl, 1 - norbornyl, 2 - norbornyl, etc. Among the above, cyclopentyl, cyclohexyl, 4 - methylcyclohexyl, and 4,4 - dimethylcyclohexyl are preferred. Additionally, the cycloalkyl can be optionally substituted.

[0047] Heteroalkyl - as used herein, heteroalkyl is formed by replacing one or more carbons in an alkyl chain with a heteroatom selected from the group consisting of nitrogen atom, oxygen atom, sulfur atom, selenium atom, phosphorus atom, silicon atom, germanium atom, and boron atom. The heteroalkyl can be a heteroalkyl having 1 to 20 carbon atoms, preferably a heteroalkyl having 1 to 10 carbon atoms, more preferably a heteroalkyl having 1 to 6 carbon atoms. Examples of heteroalkyl include methoxymethyl, ethoxymethyl, ethoxyethyl, methylthiomethyl, ethylthiomethyl, ethylthioethyl, methoxymethoxymethyl, ethoxymethoxymethyl, ethoxyethoxyethyl, hydroxymethyl, hydroxyethyl, hydroxypropyl, mercaptomethyl, mercaptoethyl, mercaptopropyl, aminomethyl, aminoethyl, aminopropyl, dimethylaminomethyl, trimethylgermylmethyl, trimethylgermylethyl, trimethylgermylisopropyl, dimethylethylgermylmethyl, dimethylisopropylgermylmethyl, tert - butyldimethylgermylmethyl, triethylgermylmethyl, triethylgermylethyl, triisopropylgermylmethyl, triisopropylgermylethyl, trimethylsilylmethyl, trimethylsilylethyl, trimethylsilylisopropyl, triisopropylsilylmethyl, triisopropylsilylethyl. Additionally, the heteroalkyl can be optionally substituted.

[0048] Alkenyl - as used herein, encompasses straight - chain, branched - chain, and cyclic olefin groups. The alkenyl can be an alkenyl having 2 to 20 carbon atoms, preferably an alkenyl having 2 to 10 carbon atoms. Examples of alkenyl include vinyl, propenyl, 1 - butenyl, 2 - butenyl, 3 - butenyl, 1,3 - butadienyl, 1 - methylvinyl, styryl, 2,2 - diphenylethylene, 1,2 - diphenylethylene, 1 - methylallyl, 1,1 - dimethylallyl, 2 - methylallyl, 1 - phenylallyl, 2 - phenylallyl, 3 - phenylallyl, 3,3 - diphenylallyl, 1,2 - dimethylallyl, 1 - phenyl - 1 - butenyl, 3 - phenyl - 1 - butenyl, cyclopentenyl, cyclopentadienyl, cyclohexenyl, cycloheptenyl, cycloheptatrienyl, cyclooctenyl, cyclooctatetraenyl, and norbornenyl. Additionally, the alkenyl can be optionally substituted.

[0049] Alkynyl - As used herein, it encompasses straight-chain alkynyl. The alkynyl can be an alkynyl having 2 to 20 carbon atoms, preferably an alkynyl having 2 to 10 carbon atoms. Examples of alkynyl include ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, 2-pentynyl, 3,3-dimethyl-1-butynyl, 3-ethyl-3-methyl-1-pentynyl, 3,3-diisopropyl-1-pentynyl, phenylacetylenyl, phenylpropynyl, etc. Among the above, ethynyl, propynyl, propargyl, 1-butynyl, 2-butynyl, 3-butynyl, 1-pentynyl, phenylacetylenyl are preferred. Additionally, the alkynyl can be optionally substituted.

[0050] Aryl or aromatic group - As used herein, non-fused and fused systems are considered. The aryl can be an aryl having 6 to 30 carbon atoms, preferably an aryl having 6 to 20 carbon atoms, more preferably an aryl having 6 to 12 carbon atoms. Examples of aryl include phenyl, biphenyl, terphenyl, triphenylene, tetraphenylene, naphthalene, anthracene, phenanthrene, fluorene, pyrene, perylene and azulene, preferably phenyl, biphenyl, terphenyl, triphenylene, fluorene and naphthalene. Examples of non-fused aryl include phenyl, 2-biphenylyl, 3-biphenylyl, 4-biphenylyl, 4-p-terphenyllyl, 3-p-terphenyllyl, 2-p-terphenyllyl, 4-m-terphenyllyl, 3-m-terphenyllyl, 2-m-terphenyllyl, o-tolyl, m-tolyl, p-tolyl, p-(2-phenylpropyl)phenyl, 4'-methylbiphenylyl, 4''-tert-butyl-4-p-terphenyllyl, o-cumyl, m-cumyl, p-cumyl, 2,3-xylyl, 3,4-xylyl, 2,5-xylyl, mesityl and m-tetraphenylyl. Additionally, the aryl can be optionally substituted.

[0051] Heterocyclic group or heterocycle - As used herein, non-aromatic cyclic groups are considered. The non-aromatic heterocyclic group includes saturated heterocyclic groups having 3 - 20 ring atoms and unsaturated non-aromatic heterocyclic groups having 3 - 20 ring atoms, where at least one ring atom is selected from the group consisting of nitrogen atom, oxygen atom, sulfur atom, selenium atom, silicon atom, phosphorus atom, germanium atom and boron atom. Preferred non-aromatic heterocyclic groups are those having 3 to 7 ring atoms, which include at least one heteroatom such as nitrogen, oxygen, silicon or sulfur. Examples of non-aromatic heterocyclic groups include oxiranyl, oxetanyl, tetrahydrofuranyl, tetrahydropyranyl, dioxolanyl, dioxanyl, aziridinyl, dihydropyrrolyl, tetrahydropyrrolyl, piperidinyl, oxazolidinyl, morpholinyl, piperazinyl, oxepinyl, thiepinyl, azepinyl and tetrahydrothienyl. Additionally, the heterocyclic group can be optionally substituted.

[0052] Heteroaryl - As used herein, non - fused and fused heteroaromatic groups that can contain 1 to 5 heteroatoms, with at least one heteroatom selected from the group consisting of nitrogen atom, oxygen atom, sulfur atom, selenium atom, silicon atom, phosphorus atom, germanium atom, and boron atom. Heteroaryl also refers to heteroaromatic group. The heteroaryl can be a heteroaryl having 3 to 30 carbon atoms, preferably a heteroaryl having 3 to 20 carbon atoms, more preferably a heteroaryl having 3 to 12 carbon atoms. Suitable heteroaryls include dibenzothiophene, dibenzofuran, dibenzoselenophene, furan, thiophene, benzofuran, benzothiophene, benzoselenophene, carbazole, indolocarbazole, pyridoindole, pyrrolopyridine, pyrazole, imidazole, triazole, oxazole, thiazole, oxadiazole, oxatriazole, dioxazole, thiadiazole, pyridine, pyridazine, pyrimidine, pyrazine, triazine, oxazine, oxathiazine, oxadiazine, indole, benzimidazole, indazole, indenoazine, benzoxazole, benzisoxazole, benzothiazole, quinoline, isoquinoline, cinnoline, quinazoline, quinoxaline, naphthyridine, phthalazine, pteridine, xanthene, acridine, phenazine, phenothiazine, benzofuranopyridine, furanodipyridine, benzothiophenopyridine, thiophenodipyridine, benzoselenophenopyridine, selenophenodipyridine, preferably dibenzothiophene, dibenzofuran, dibenzoselenophene, carbazole, indolocarbazole, imidazole, pyridine, triazine, benzimidazole, 1,2 - azaborolane, 1,3 - azaborolane, 1,4 - azaborolane, borazole and their nitrogen - containing analogs. Additionally, the heteroaryl can be optionally substituted.

[0053] Alkoxy - As used herein, represented by - O - alkyl, - O - cycloalkyl, - O - heteroalkyl, or - O - heterocycloalkyl. Examples and preferred examples of alkyl, cycloalkyl, heteroalkyl, and heterocycloalkyl are the same as those described above. The alkoxy can be an alkoxy having 1 to 20 carbon atoms, preferably an alkoxy having 1 to 6 carbon atoms. Examples of alkoxy include methoxy, ethoxy, propoxy, butoxy, pentyloxy, hexyloxy, cyclopropyloxy, cyclobutyloxy, cyclopentyloxy, cyclohexyloxy, tetrahydrofuryloxy, tetrahydropyranyloxy, methoxypropyloxy, ethoxyethyloxy, methoxymethyloxy, and ethoxymethyloxy. Additionally, the alkoxy can be optionally substituted.

[0054] Aryloxy - As used herein, represented by - O - aryl or - O - heteroaryl. Examples and preferred examples of aryl and heteroaryl are the same as those described above. The aryloxy can be an aryloxy having 6 to 30 carbon atoms, preferably an aryloxy having 6 - 20 carbon atoms. Examples of aryloxy include phenoxy and biphenyloxy. Additionally, the aryloxy can be optionally substituted.

[0055] Aralkyl - As used herein, it encompasses alkyl substituted by an aryl group. The aralkyl can be an aralkyl having 7 to 30 carbon atoms, preferably an aralkyl having 7 to 20 carbon atoms, more preferably an aralkyl having 7 to 13 carbon atoms. Examples of aralkyl 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, 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 aralkyl can be optionally substituted.

[0056] Alkylsilyl - As used herein, it encompasses silyl substituted by an alkyl group. The alkylsilyl can be an alkylsilyl having 3 - 20 carbon atoms, preferably an alkylsilyl having 3 to 10 carbon atoms. Examples of alkylsilyl include trimethylsilyl, triethylsilyl, methyldiethylsilyl, ethyldimethylsilyl, tripropylsilyl, tributylsilyl, triisopropylsilyl, methyldiisopropylsilyl, dimethylisopropylsilyl, tri-tert-butylsilyl, triisobutylsilyl, dimethyltert-butylsilyl, methyldi-tert-butylsilyl. Additionally, the alkylsilyl can be optionally substituted.

[0057] Arylsilyl - As used herein, it encompasses silyl substituted by at least one aryl group. The arylsilyl can be an arylsilyl having 6 - 30 carbon atoms, preferably an arylsilyl having 8 to 20 carbon atoms. Examples of arylsilyl include triphenylsilyl, phenyldibiphenylsilyl, diphenylbiphenylsilyl, phenyldiethylsilyl, diphenylethylsilyl, phenyldimethylsilyl, diphenylmethylsilyl, phenyldiisopropylsilyl, diphenylisopropylsilyl, diphenylbutylsilyl, diphenylisobutylsilyl, diphenyltert-butylsilyl. Additionally, the arylsilyl can be optionally substituted.

[0058] Alkylgermyl – As used herein, it encompasses alkyl-substituted germyl groups. The alkylgermyl group can be an alkylgermyl group having 3 to 20 carbon atoms, preferably an alkylgermyl group having 3 to 10 carbon atoms. Examples of the alkylgermyl group include trimethylgermyl, triethylgermyl, methyldiethylgermyl, ethyldimethylgermyl, tripropylgermyl, tributylgermyl, triisopropylgermyl, methyldiisopropylgermyl, dimethylisopropylgermyl, tritert-butylgermyl, triisobutylgermyl, dimethyltert-butylgermyl, methylditert-butylgermyl. Additionally, the alkylgermyl group can be optionally substituted.

[0059] Arylgermyl – As used herein, it encompasses germyl groups substituted with at least one aryl or heteroaryl group. The arylgermyl group can be an arylgermyl group having 6 to 30 carbon atoms, preferably an arylgermyl group having 8 to 20 carbon atoms. Examples of the arylgermyl group include triphenylgermyl, phenyldibiphenylgermyl, diphenylbiphenylgermyl, phenyldiethylgermyl, diphenylethylgermyl, phenyldimethylgermyl, diphenylmethylgermyl, phenyldiisopropylgermyl, diphenylisopropylgermyl, diphenylbutylgermyl, diphenylisobutylgermyl, diphenyltert-butylgermyl. Additionally, the arylgermyl group can be optionally substituted.

[0060] In terms such as aza-dibenzofuran and aza-dibenzothiophene, the term "aza" means that one or more C-H groups in the corresponding aromatic fragment are replaced by nitrogen atoms. For example, azatriphenylene includes dibenzo[f,h]quinoxaline, dibenzo[f,h]quinoline, and other analogs having two or more nitrogens in the ring system. Those of ordinary skill in the art can readily envision other nitrogen analogs of the above-described aza derivatives, and all such analogs are determined to be included in the terms described herein.

[0061] In the present disclosure, unless otherwise defined, when any one of the terms consisting of the following groups is used: substituted alkyl, substituted cycloalkyl, substituted heteroalkyl, substituted heterocycloalkyl, substituted aralkyl, substituted alkoxy, substituted aryloxy, substituted alkenyl, substituted alkynyl, substituted aryl, substituted heteroaryl, substituted alkylsilyl, substituted arylsilyl, substituted alkylgermyl, substituted arylgermyl, substituted amino, substituted acyl, substituted carbonyl, substituted carboxy, substituted ester, substituted sulfinyl, substituted sulfonyl, substituted phosphino, it means that any one of the groups alkyl, cycloalkyl, heteroalkyl, heterocycloalkyl, aralkyl, alkoxy, aryloxy, alkenyl, alkynyl, aryl, heteroaryl, alkylsilyl, arylsilyl, alkylgermyl, arylgermyl, amino, acyl, carbonyl, carboxy, ester, sulfinyl, sulfonyl and phosphino may be substituted by one or more selected from deuterium, halogen, unsubstituted alkyl having 1-20 carbon atoms, unsubstituted cycloalkyl having 3-20 ring carbon atoms, unsubstituted heteroalkyl having 1-20 carbon atoms, unsubstituted heterocycloalkyl having 3-20 ring atoms, unsubstituted aralkyl having 7-30 carbon atoms, unsubstituted alkoxy having 1-20 carbon atoms, unsubstituted aryloxy having 6-30 carbon atoms, unsubstituted alkenyl having 2-20 carbon atoms, unsubstituted alkynyl having 2-20 carbon atoms, unsubstituted aryl having 6-30 carbon atoms, unsubstituted heteroaryl having 3-30 carbon atoms, unsubstituted alkylsilyl having 3-20 carbon atoms, unsubstituted arylsilyl having 6-20 carbon atoms, unsubstituted alkylgermyl having 3-20 carbon atoms, unsubstituted arylgermyl having 6-20 carbon atoms, unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxy, ester, cyano, isocyano, hydroxy, mercapto, sulfinyl, sulfonyl, phosphino and combinations thereof.

[0062] It should be understood that when a molecular fragment is described as a substituent or otherwise attached to another moiety, its name may be written according to whether it is a fragment (e.g., phenyl, phenylene, naphthyl, dibenzofuranyl) or according to whether it is the entire molecule (such as benzene, naphthalene, dibenzofuran). As used herein, these different ways of specifying a substituent or attached fragment are considered equivalent.

[0063] In the compounds mentioned in the present disclosure, the hydrogen atoms may be partially or completely replaced by deuterium. Other atoms such as carbon and nitrogen may also be replaced by their other stable isotopes. Replacement of other stable isotopes in the compounds may be preferred due to their enhanced device efficiency and stability.

[0064] Among the compounds mentioned in the present disclosure, polysubstitution refers to the range including disubstitution up to the maximum available substitution. When a certain substituent in the compounds mentioned in the present disclosure indicates polysubstitution (including disubstitution, trisubstitution, tetrasubstitution, etc.), it means that the substituent can exist at multiple available substitution positions on its connecting structure, and the substituent existing at multiple available substitution positions can be of the same structure or different structures.

[0065] Among the compounds mentioned in the present disclosure, unless explicitly defined, for example, adjacent substituents can optionally connect to form a ring, otherwise adjacent substituents in the compound cannot connect to form a ring. Among the compounds mentioned in the present disclosure, adjacent substituents can optionally connect to form a ring, which includes both the case where adjacent substituents can connect to form a ring and the case 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 spiro ring, bridged ring, fused ring, etc.), and an alicyclic ring, heteroalicyclic ring, aromatic ring or heteroaromatic ring. In this expression, 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.

[0066] The expression that adjacent substituents can optionally connect to form a ring is also intended to be considered as referring to two substituents bonded to the same carbon atom connecting to each other through a chemical bond to form a ring, which can be exemplified by the following formula:

[0067]

[0068] The expression that adjacent substituents can optionally connect to form a ring is also intended to be considered as referring to two substituents bonded to carbon atoms directly bonded to each other connecting to each other through a chemical bond to form a ring, which can be exemplified by the following formula:

[0069]

[0070] The expression that adjacent substituents can optionally connect to form a ring is also intended to be considered as referring to two substituents bonded to carbon atoms further away connecting to each other through a chemical bond to form a ring, which can be exemplified by the following formula:

[0071]

[0072] In addition, the expression that adjacent substituents can optionally connect to form a ring is also intended to be considered as referring to the case where, when one of the adjacent two substituents represents hydrogen, the second substituent is bonded to the position where the hydrogen atom is bonded, thereby forming a ring. This is exemplified by the following formula:

[0073]

[0074] According to one embodiment of the present invention, a compound having the structure of Formula 1 is disclosed:

[0075]

[0076] wherein,

[0077] Z1 and Z2 are each independently selected from O, S, SiRR, Se or CRR; when two Rs are present simultaneously, the two Rs are the same or different;

[0078] X1 to X4, X8 to X 11 are the same or different each time they appear and are independently selected from C, N or CR x , and one of X1 to X4 is C and is connected to L2, and one of X8 to X 11 is C and is connected to L2;

[0079] X5 to X7, X 12 to X 15 are the same or different each time they appear and are independently selected from N or CR x ;

[0080] Y1 to Y9 are the same or different each time they appear and are independently selected from C, N or CR y , and one of Y1 to Y5 is C, one of Y6 to Y9 is C, and the two Cs are directly connected;

[0081] Y 10 to Y 13 are the same or different each time they appear and are independently selected from N or CR y ;

[0082] L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted arylene having 6 - 30 carbon atoms, a substituted or unsubstituted heteroarylene having 3 - 30 carbon atoms, or a combination thereof;

[0083] Ar is selected from a substituted or unsubstituted aryl having 6 - 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, or a combination thereof;

[0084] R, R x , R yEach occurrence is the same or different and is selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclic group having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted alkynyl having 2-20 carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermyl having 3-20 carbon atoms, substituted or unsubstituted arylgermyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof.

[0085] In the present text, the six-membered ring containing X1 to X4 is connected to L2, the connection position of L2 can be any one of X1, X2, X3, X4, and the atom at the connection position is C. The six-membered ring containing X8 to X 11 is connected to L2, the connection position of L2 can be any one of X8, X9, X 10 , X 11 , and the atom at the connection position is C.

[0086] In the present text, "Y1 to Y9 are each the same or different and are selected from C, N or CR y , one of Y1 to Y5 is C, one of Y6 to Y9 is C, and the two Cs are directly connected" is intended to mean that the six-membered ring containing Y1 to Y5 and the six-membered ring containing Y6 to Y9 are directly connected, and the atom at the connection position is C.

[0087] According to an embodiment of the present invention, at least one of Z1 and Z2 is selected from O.

[0088] According to an embodiment of the present invention, Z1 or Z2 is selected from O.

[0089] According to an embodiment of the present invention, Z1 and Z2 are each independently selected from O or S.

[0090] According to an embodiment of the present invention, Z1 and Z2 are selected from O.

[0091] According to one embodiment of the present invention, wherein X1 to X4, X8 to X 11 are the same or different each time they appear and are selected from C or CR x , X5 to X7, X 12 to X 15 are the same or different each time they appear and are selected from CR x ;

[0092] R x is the same or different each time it appears and is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 - 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 - 20 ring carbon atoms, substituted or unsubstituted aryl having 6 - 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, and combinations thereof.

[0093] According to one embodiment of the present invention, wherein X1 to X4, X8 to X 11 are the same or different each time they appear and are selected from C or CR x , X5 to X7, X 12 to X 15 are the same or different each time they appear and are selected from CR x ;

[0094] R x is the same or different each time it appears and is selected from the group consisting of: hydrogen, deuterium, fluorine, phenyl, pyridyl, pyrimidinyl, naphthyl, biphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, yl, methyl, ethyl, tert - butyl, adamantyl, cyclohexyl, cyclopentyl, and combinations thereof.

[0095] According to one embodiment of the present invention, wherein X1 or X2 is selected from C, X9 or X 10 is selected from C.

[0096] According to one embodiment of the present invention, wherein X1 is selected from C, X 10 is selected from C.

[0097] According to one embodiment of the present invention, wherein Y1 to Y9 are the same or different each time they appear and are selected from C or CR y , Y 10 to Y 13 are the same or different each time they appear and are selected from CR y ;

[0098] R yEach occurrence is the same as or different from and is selected from the group consisting of: hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof.

[0099] According to one embodiment of the present invention, wherein Y1 to Y9 are each the same as or different from and are selected from C or CR y , Y 10 to Y 13 Each occurrence is the same as or different from and is selected from CR y ;

[0100] R y Each occurrence is the same as or different from and is selected from the group consisting of: hydrogen, deuterium, fluorine, phenyl, pyridyl, pyrimidinyl, naphthyl, biphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, group, methyl, ethyl, tert-butyl, adamantyl, cyclohexyl, cyclopentyl, and combinations thereof.

[0101] According to one embodiment of the present invention, wherein Y2 or Y3 is selected from C, and Y6 or Y7 is selected from C.

[0102] According to one embodiment of the present invention, wherein R each occurrence is the same as or different from and is selected from the group consisting of: hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof.

[0103] According to one embodiment of the present invention, wherein R each occurrence is the same as or different from and is selected from the group consisting of: hydrogen, deuterium, fluorine, phenyl, pyridyl, pyrimidinyl, naphthyl, biphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, group, methyl, ethyl, tert-butyl, adamantyl, cyclohexyl, cyclopentyl, and combinations thereof.

[0104] According to one embodiment of the present invention, wherein R x , R y Each occurrence is the same as or different from and is selected from the group consisting of: hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl group having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl group having 3 to 30 carbon atoms, and combinations thereof.

[0105] According to one embodiment of the present invention, wherein R x , R y , each occurrence is the same or different and is selected from the group consisting of hydrogen, deuterium, fluorine, phenyl, pyridyl, pyrimidinyl, naphthyl, biphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, group, methyl, ethyl, tert-butyl, adamantyl, cyclohexyl, cyclopentyl, and combinations thereof.

[0106] According to one embodiment of the present invention, wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 20 carbon atoms, substituted or unsubstituted heteroaryl groups having 3 to 20 carbon atoms, or combinations thereof.

[0107] According to one embodiment of the present invention, wherein Ar is selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted phenanthryl, substituted or unsubstituted triphenylenyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, substituted or unsubstituted dibenzoselenophenyl, substituted or unsubstituted silole, substituted or unsubstituted fluorene, substituted or unsubstituted spirofluorene, substituted or unsubstituted spirosilole, substituted or unsubstituted group, substituted or unsubstituted pyridyl, substituted or unsubstituted pyrimidinyl, substituted or unsubstituted benzoxazolyl, or combinations thereof.

[0108] According to one embodiment of the present invention, wherein Ar is selected from phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, fluorene, silole, group, benzoxazolyl, or combinations thereof.

[0109] According to one embodiment of the present invention, wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 30 carbon atoms.

[0110] According to one embodiment of the present invention, wherein Ar is selected from substituted or unsubstituted aryl groups having 6 to 20 carbon atoms.

[0111] According to one embodiment of the present invention, wherein Ar is selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted fluorene, substituted or unsubstituted spirofluorene, substituted or unsubstituted phenanthryl, substituted or unsubstituted triphenylenyl, substituted or unsubstituted group, or combinations thereof.

[0112] According to one embodiment of the present invention, wherein Ar is selected from phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, triphenylenyl, fluorene, group, or combinations thereof.

[0113] According to one embodiment of the present invention, L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted arylene having 6-20 carbon atoms, a substituted or unsubstituted heteroarylene having 3-20 carbon atoms, or a combination thereof.

[0114] According to one embodiment of the present invention, L1 and L2 are each independently selected from a single bond, or a substituted or unsubstituted arylene having 6-20 carbon atoms.

[0115] According to one embodiment of the present invention, wherein L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene.

[0116] According to one embodiment of the present invention, wherein the compound is selected from the group consisting of Compound A-1 to Compound A-302, and the specific structures of the Compound A-1 to Compound A-302 are shown in Claim 10.

[0117] According to one embodiment of the present invention, wherein in the structures of the Compound A-1 to Compound A-302, the hydrogen can be partially or completely replaced by deuterium.

[0118] According to another embodiment of the present invention, an organic electroluminescent device is also disclosed, which includes:

[0119] An anode,

[0120] A cathode,

[0121] And an organic layer disposed between the anode and the cathode, wherein the organic layer contains a compound having the structure of Formula 1, and the specific structure of the compound is as described in any of the foregoing embodiments.

[0122] According to one embodiment of the present invention, in the organic electroluminescent device, the organic layer is a light-emitting layer, a hole-transporting layer or an electron-blocking layer.

[0123] According to one embodiment of the present invention, in the organic electroluminescent device, the organic layer is a light-emitting layer, and the compound is a host material.

[0124] According to one embodiment of the present invention, in the organic electroluminescent device, the organic layer is a light-emitting layer, and the light-emitting layer contains a second compound, the second compound is a host material, and the second compound has a structure represented by Formula 2:

[0125]

[0126] In Formula 2,

[0127] L21 to L 23 each occurrence being the same as or different from one another and independently selected from a single bond, a substituted or unsubstituted alkylene having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene having 3 to 20 carbon atoms, a substituted or unsubstituted arylene having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene having 3 to 30 carbon atoms, or a combination thereof;

[0128] Ar 21 to Ar 23 each occurrence being the same as or different from one another and independently selected from a substituted or unsubstituted aryl having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or a combination thereof.

[0129] According to one embodiment of the present invention, wherein the second compound has the structure shown in Formula 2-1:

[0130]

[0131] V1-V6 are each occurrence the same as or different from one another and independently selected from C, N or CR v and one of V1-V6 is C and is connected to L 23 connected;

[0132] L1 to L3 are each occurrence the same as or different from one another and independently selected from a single bond, a substituted or unsubstituted alkylene having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkylene having 3 to 20 carbon atoms, a substituted or unsubstituted arylene having 6 to 30 carbon atoms, a substituted or unsubstituted heteroarylene having 3 to 30 carbon atoms, or a combination thereof;

[0133] Ar 21 and Ar 22 each occurrence being the same as or different from one another and independently selected from a substituted or unsubstituted aryl having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, or a combination thereof;

[0134] R vEach occurrence is the same or different and is selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0135] Adjacent substituents R v can optionally be joined to form a ring.

[0136] As used herein, adjacent substituents R v can optionally be joined to form a ring, which is intended to mean that any adjacent substituents R v can be joined to form a ring. Obviously, any adjacent substituents R v can also not be joined to form a ring.

[0137] According to one embodiment of the present invention, the second compound has the structure shown in Formula 2-1-1 or Formula 2-1-2:

[0138]

[0139]

[0140] Wherein in Formula 2-1-1, V1-V5 are each the same or different and are selected from C, N or CR v , V 11 -V 15 are each the same or different and are selected from N or CR v1 , and one of V1-V5 is C and is connected to L 23 ; in Formula 2-1-2, V1-V4 are each the same or different and are selected from C, N or CR v , V 11 -V 14 are each the same or different and are selected from N or CRv1 and one of V1 - V4 is C and is connected to L 23 ;

[0141] V is selected from O, S or Se;

[0142] L 21 to L 23 each occurrence is the same as or different from and is selected from a single bond, a substituted or unsubstituted alkylene having 1 - 20 carbon atoms, a substituted or unsubstituted cycloalkylene having 3 - 20 carbon atoms, a substituted or unsubstituted arylene having 6 - 30 carbon atoms, a substituted or unsubstituted heteroarylene having 3 - 30 carbon atoms, or a combination thereof;

[0143] Ar 21 and Ar 22 each occurrence is the same as or different from and is selected from a substituted or unsubstituted aryl having 6 - 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, or a combination thereof;

[0144] R v , R v1 each occurrence is the same as or different from and is selected from the group consisting of hydrogen, deuterium, halogen, a substituted or unsubstituted alkyl having 1 - 20 carbon atoms, a substituted or unsubstituted cycloalkyl having 3 - 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl having 1 - 20 carbon atoms, a substituted or unsubstituted heterocyclic group having 3 - 20 ring atoms, a substituted or unsubstituted aralkyl having 7 - 30 carbon atoms, a substituted or unsubstituted alkoxy having 1 - 20 carbon atoms, a substituted or unsubstituted aryloxy having 6 - 30 carbon atoms, a substituted or unsubstituted alkenyl having 2 - 20 carbon atoms, a substituted or unsubstituted aryl having 6 - 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, a substituted or unsubstituted alkylsilyl having 3 - 20 carbon atoms, a substituted or unsubstituted arylsilyl having 6 - 20 carbon atoms, a substituted or unsubstituted alkylgermyl having 3 - 20 carbon atoms, a substituted or unsubstituted arylgermyl having 6 - 20 carbon atoms, a substituted or unsubstituted amino having 0 - 20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0145] Adjacent substituents R v , R v1 can optionally be linked to form a ring.

[0146] As used herein, adjacent substituents R v , R v1 can optionally be linked to form a ring, which is intended to mean a group of adjacent substituents, for example, adjacent substituents Rv between adjacent substituents R v1 between, and between adjacent substituents R v and R v1 between, any one or more of these substituent groups may be joined to form a ring. Obviously, these substituents may also not be joined to form a ring at all.

[0147] According to one embodiment of the present invention, in Formula 2-1-2, V is selected from O or S.

[0148] According to one embodiment of the present invention, in Formula 2-1-2, V is O.

[0149] According to one embodiment of the present invention, in Formula 2-1-1, V1 to V5 are each independently selected from C or CR v , V 11 to V 15 are each independently selected from CR v1 ; in Formula 2-1-2, V1 to V4 are each independently selected from C or CR v , V 11 to V 14 are each independently selected from CR v1 .

[0150] According to one embodiment of the present invention,, wherein said R v , R v1 are each independently selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, and combinations thereof.

[0151] According to one embodiment of the present invention, in Formula 2-1-1, at least one of V1 to V5 is selected from CR v , or at least one of V 11 to V 15 is selected from CR v1 ; in Formula 2-1-2, at least one of V1 to V4 is selected from CR v , or at least one of V 11 to V 14 is selected from CR v1 ; and said R v , R v1 are each independently selected from substituted or unsubstituted aryl having 6-30 carbon atoms.

[0152] According to one embodiment of the present invention, wherein said R v , R v1 is the same or different each time it appears and is selected from the group consisting of: hydrogen, deuterium, substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, and combinations thereof.

[0153] According to one embodiment of the present invention, wherein at least one of said Ar 21 and Ar 22 has a structure of two fused rings or three fused rings.

[0154] According to one embodiment of the present invention, wherein Ar 21 and Ar 22 is the same or different each time it appears and is selected from substituted or unsubstituted aryl having 6 - 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 - 20 carbon atoms, or combinations thereof.

[0155] According to one embodiment of the present invention, wherein Ar 21 and Ar 22 is the same or different each time it appears and is selected from substituted or unsubstituted phenyl, substituted or unsubstituted biphenyl, substituted or unsubstituted terphenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted phenanthryl, substituted or unsubstituted triphenylene, substituted or unsubstituted group, substituted or unsubstituted fluorenyl, substituted or unsubstituted carbazolyl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothiophenyl, substituted or unsubstituted pyridyl, substituted or unsubstituted pyrimidinyl, substituted or unsubstituted quinolinyl, substituted or unsubstituted indolocarbazolyl, or combinations thereof.

[0156] According to one embodiment of the present invention, wherein L 21 to L 23 is the same or different each time it appears and is selected from a single bond, substituted or unsubstituted arylene having 6 - 20 carbon atoms, substituted or unsubstituted heteroarylene having 3 - 20 carbon atoms, or combinations thereof.

[0157] According to one embodiment of the present invention, wherein L 21 to L 23 is the same or different each time it appears and is selected from a single bond, substituted or unsubstituted phenylene, substituted or unsubstituted naphthylene, substituted or unsubstituted biphenylene, or combinations thereof.

[0158] According to one embodiment of the present invention, wherein the second compound is selected from the group consisting of compound B - 1 to compound B - 255, and the specific structures of the compound B - 1 to compound B - 255 are shown in claim 12.

[0159] According to an embodiment of the present invention, the hydrogen in the structures of Compounds B-1 to B-255 can be partially or completely substituted by deuterium.

[0160] According to an embodiment of the present invention, in the preparation of a device, when using the compound of the present invention and a second compound to co-evaporate with a luminescent material to form a light-emitting layer, the light-emitting layer can be formed by co-evaporating the compound of the present invention, the second compound, and the luminescent material in different evaporation sources respectively, or by placing a mixture of the compound of the present invention and the second compound pre-mixed in the same evaporation source, and then co-evaporating with the luminescent material placed in another evaporation source to form the light-emitting layer. This pre-mixing method can further save evaporation sources.

[0161] According to an embodiment of the present invention, in the organic electroluminescent device, the organic layer is a light-emitting layer, and the light-emitting layer contains at least one phosphorescent luminescent material.

[0162] According to an embodiment of the present invention, in the organic electroluminescent device, the organic layer is a light-emitting layer, and the light-emitting layer contains at least one phosphorescent luminescent material.

[0163] According to an embodiment of the present invention, the phosphorescent luminescent material is a metal complex, and the metal complex has the general formula M(L a ) m (L b ) n (L c ) q ;

[0164] M is selected from metals with a relative atomic mass greater than 40;

[0165] L a , L b and L c are the first ligand, the second ligand, and the third ligand coordinated with the M respectively; L a , L b and L c can optionally be connected to form a polydentate ligand;

[0166] L a , L b and L c are the same or different; m is 1, 2, or 3; n is 0, 1, or 2; q is 0, 1, or 2; the sum of m, n, and q is equal to the oxidation state of the M; when m is greater than or equal to 2, multiple L a are the same or different; when n is 2, the two L b are the same or different; when q is 2, the two L c are the same or different;

[0167] La identically or differently selected from the structures represented by Formula 3 each time it appears:

[0168]

[0169] wherein,

[0170] ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0171] ring E is selected from a 5-membered unsaturated carbocyclic ring, a benzene ring, a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0172] ring D and ring E are fused via U a and U b ;

[0173] U a and U b are identically or differently selected from C or N each time they appear;

[0174] R d and R e are identically or differently monosubstituted, polysubstituted or unsubstituted each time they appear;

[0175] V 31 to V 34 are identically or differently selected from CR v3 or N each time they appear;

[0176] R d , R e and R v3 are identically or differently selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclic group having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermyl having 3-20 carbon atoms, substituted or unsubstituted arylgermyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0177] Adjacent substituents R d ,R e and R v3 can optionally be joined to form a ring;

[0178] L b and L c are each independently selected from any of the following structures:

[0179]

[0180] wherein,

[0181] R a ,R b and R c are each independently monosubstituted, polysubstituted, or unsubstituted;

[0182] X b is each independently selected from the group consisting of O, S, Se, NR N1 and CR C1 R C2 ;

[0183] X c and X d are each independently selected from the group consisting of O, S, Se and NR N2 ;

[0184] R a ,R b ,R c ,R N1 ,R N2 ,R C1 and R C2Each occurrence is the same or different and is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclic group having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted alkynyl having 2-20 carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermyl having 3-20 carbon atoms, substituted or unsubstituted arylgermyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0185] The ligand L b , L c In the structure of, adjacent substituents R a , R b , R c , R N1 , R N2 , R C1 and R C2 can optionally be linked to form a ring.

[0186] Herein, adjacent substituents R d , R e , R v3 can optionally be linked to form a ring, which is intended to mean that when there are substituents R d , substituent R e , substituent R v3 , among which adjacent substituent groups, such as between adjacent substituents R d , between adjacent substituents R e , between adjacent substituents R v3 , between adjacent substituents R d and R e , between adjacent substituents R d and R v3 , and between adjacent substituents R e and R v3 , any one or more of these adjacent substituent groups can be linked to form a ring. Obviously, when there are substituents Rd , the substituent R e , the substituent R v3 , these substituent groups may also not be connected to form a ring.

[0187] In this text, adjacent substituents R a , R b , R c , R N1 , R N2 , R C1 and R C2 can optionally be connected to form a ring, which is intended to represent adjacent substituent groups among them. For example, between two substituents R a , between two substituents R b , between two substituents R c , between the substituent R a and R b , between the substituent R a and R c , between the substituent R b and R c , between the substituent R a and R N1 , between the substituent R b and R N1 , between the substituent R a and R C1 , between the substituent R a and R C2 , between the substituent R b and R C1 , between the substituent R b and R C2 , between the substituent R a and R N2 , between the substituent R b and R N2 , and between R C1 and R C2 , any one or more of these substituent groups can be connected to form a ring. For example, the adjacent substituents R a , R b can optionally be connected to form a ring, which can form one or more of the following structures including but not limited to: wherein, W is selected from O, S, Se, NR w or CR w R w ; wherein the said R w , R a ’, R b ’ are defined as the said Ra are the same. Obviously, these substituents may also not be connected to each other to form a ring.

[0188] According to one embodiment of the present invention, in Formula 3, two adjacent substituents R e are connected to form a ring.

[0189] According to one embodiment of the present invention, in Formula 3, two adjacent substituents R e are connected to form a 5-membered unsaturated carbon ring, a 5-membered heteroaryl ring or a benzene ring.

[0190] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaryl ring, and ring E is a benzene ring or a 6-membered heteroaryl ring.

[0191] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaryl ring, and ring E is a 5-membered heteroaryl ring or a 5-membered unsaturated carbon ring.

[0192] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaryl ring, ring E is a benzene ring or a 6-membered heteroaryl ring, and two adjacent substituents R e are connected to form a benzene ring or a 6-membered heteroaryl ring.

[0193] According to one embodiment of the present invention, in Formula 3, ring D is a 6-membered heteroaryl ring, ring E is a 5-membered heteroaryl ring or a 5-membered unsaturated carbon ring, and two adjacent substituents R e are connected to form a benzene ring or a 6-membered heteroaryl ring.

[0194] According to one embodiment of the present invention, in Formula 3, at least one or two groups of adjacent substituents in R d , R e , R v3 are connected to form a ring. For example, two substituents R d are connected to form a ring, or two substituents R e are connected to form a ring, or two substituents R v3 are connected to form a ring, or a substituent R d and a substituent R e are connected to form a ring, or a substituent R d and a substituent R v3 are connected to form a ring, or a substituent R e and a substituent R v3 are connected to form a ring, or two substituents R d are connected to form a ring while two substituents R e are connected to form a ring, or two substituents R d are connected to form a ring while two substituents R v3 are connected to form a ring, or two substituents R eTwo substituents R form a ring while being connected v3 Form a ring while being connected, substituent R e With substituent R v3 Two substituents R form a ring while being connected v3 Form a ring while being connected, or substituent R d With substituent R v3 Two substituents R form a ring while being connected v3 Form a ring; R d 、R e 、R v3 A similar situation occurs when more groups of adjacent substituents among R, R, R are connected to form a ring.

[0195] According to an embodiment of the present invention, in the organic electroluminescent device, the phosphorescent light-emitting material is a metal complex, and the metal complex has the general formula M(L a ) m (L b ) n ;

[0196] M is selected from metals with a relative atomic mass greater than 40;

[0197] L a , L b Are the first ligand and the second ligand coordinated with the M respectively; L a , L b Can optionally be connected to form a polydentate ligand;

[0198] m is 1, 2 or 3; n is 0, 1 or 2; the sum of m and n is equal to the oxidation state of the M; when m is greater than or equal to 2, multiple L a Can be the same or different; when n is 2, two L b Can be the same or different;

[0199] L a Each occurrence is the same or different and is selected from the structure shown in Formula 3:

[0200]

[0201] Wherein,

[0202] Ring D is selected from a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0203] Ring E is selected from a 5-membered unsaturated carbon ring, a benzene ring, a 5-membered heteroaromatic ring or a 6-membered heteroaromatic ring;

[0204] Ring D and ring E are fused via U a And U b ;

[0205] U a And U bEach occurrence is the same as or different from and is selected from C or N;

[0206] R d and R e Each occurrence is the same as or different from and represents mono-substituted, multi-substituted or unsubstituted;

[0207] V 31 to V 34 Each occurrence is the same as or different from and is selected from CR v3 or N;

[0208] R d , R e and R v3 Each occurrence is the same as or different from and is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 - 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 - 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 - 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 - 20 ring atoms, substituted or unsubstituted aralkyl having 7 - 30 carbon atoms, substituted or unsubstituted alkoxy having 1 - 20 carbon atoms, substituted or unsubstituted aryloxy having 6 - 30 carbon atoms, substituted or unsubstituted alkenyl having 2 - 20 carbon atoms, substituted or unsubstituted aryl having 6 - 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 - 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 - 20 carbon atoms, substituted or unsubstituted alkylgermyl having 3 - 20 carbon atoms, substituted or unsubstituted arylgermyl having 6 - 20 carbon atoms, substituted or unsubstituted amino having 0 - 20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof;

[0209] Adjacent substituents R d , R e and R v3 can optionally be linked to form a ring;

[0210] Wherein the ligand L b Each occurrence is the same as or different from and is selected from the following structures:

[0211]

[0212] Wherein, each of R1 to R7 is independently selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, acyl group, carbonyl group, carboxyl group, ester group, cyano group, isocyano group, sulfhydryl group, sulfinyl group, sulfonyl group, phosphino group, and combinations thereof.

[0213] According to one embodiment of the present invention, in the organic electroluminescent device, wherein the ligand L b is the same or different each time it appears and is selected from the following structures:

[0214]

[0215] Wherein, at least one of R1 to R3 is selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, or combinations thereof; and / or at least one of R4 to R6 is selected from substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, or combinations thereof.

[0216] According to one embodiment of the present invention, in the organic electroluminescent device, wherein the ligand L b is the same or different each time it appears and is selected from the following structures:

[0217]

[0218] Wherein, at least two of R1 to R3 are the same or different each time they appear and are selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof; and / or at least two of R4 to R6 are the same or different each time they appear and are selected from a substituted or unsubstituted alkyl group having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 1 to 20 carbon atoms, or a combination thereof.

[0219] According to one embodiment of the present invention, in the organic electroluminescent device, wherein the ligand L b is the same or different each time it appears and is selected from the following structures:

[0220]

[0221] Wherein, at least two of R1 to R3 are the same or different each time they appear and are selected from a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 2 to 20 carbon atoms, or a combination thereof; and / or at least two of R4 to R6 are the same or different each time they appear and are selected from a substituted or unsubstituted alkyl group having 2 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl group having 3 to 20 ring carbon atoms, a substituted or unsubstituted heteroalkyl group having 2 to 20 carbon atoms, or a combination thereof.

[0222] According to one embodiment of the present invention, in the organic electroluminescent device, the phosphorescent material is an Ir complex, a Pt complex or an Os complex.

[0223] According to one embodiment of the present invention, in the organic electroluminescent device, the phosphorescent material is an Ir complex and has a structure represented by any one of Ir(L a )(L b )(L c ), Ir(L a )2(L b ), Ir(L a )(L b )2, Ir(L a )2(L c ) or Ir(L a )(L c )2.

[0224] According to one embodiment of the present invention, wherein L aIt has a structure as shown in Formula 3 and contains at least one structural unit selected from the group consisting of a 6-membered fused 6-membered aromatic ring, a 6-membered fused 6-membered heteroaromatic ring, a 6-membered fused 5-membered aromatic ring, and a 6-membered fused 5-membered heteroaromatic ring.

[0225] According to one embodiment of the present invention, in the organic electroluminescent device, wherein L a It has a structure as shown in Formula 3 and contains at least one structural unit selected from the group consisting of naphthalene, phenanthrene, quinoline, isoquinoline, and aza-phenanthrene.

[0226] According to one embodiment of the present invention, in the organic electroluminescent device, the phosphorescent light-emitting material is an Ir complex and contains a ligand L a , the L a Each occurrence is the same or different and is optionally selected from any one of the group consisting of the following structures:

[0227]

[0228]

[0229]

[0230] In the structure, TMS represents trimethylsilyl.

[0231] According to one embodiment of the present invention, wherein, in the organic electroluminescent device, the phosphorescent light-emitting material is an Ir complex and contains a ligand L b , the L b Each occurrence is the same or different and is optionally selected from any one of the group consisting of the following structures:

[0232]

[0233] According to one embodiment of the present invention, wherein, in the organic electroluminescent device, the phosphorescent light-emitting material is selected from the group consisting of the following structures:

[0234]

[0235]

[0236]

[0237]

[0238]

[0239]

[0240]

[0241]

[0242] In the said structure, TMS represents trimethylsilyl.

[0243] According to another embodiment of the present invention, a compound composition is also disclosed, which comprises a compound having a structure of Formula 1, and the specific structure of the compound is as shown in any of the foregoing embodiments.

[0244] According to an embodiment of the present invention, wherein the compound composition comprises a second compound having a structure represented by Formula 2:

[0245]

[0246] In Formula 2,

[0247] L 21 to L 23 each occurrence is the same or different and is independently selected from a single bond, a substituted or unsubstituted alkylene having 1-20 carbon atoms, a substituted or unsubstituted cycloalkylene having 3-20 carbon atoms, a substituted or unsubstituted arylene having 6-30 carbon atoms, a substituted or unsubstituted heteroarylene having 3-30 carbon atoms, or a combination thereof;

[0248] Ar 21 to Ar 23 each occurrence is the same or different and is independently selected from a substituted or unsubstituted aryl having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl having 3-30 carbon atoms, or a combination thereof.

[0249] According to another embodiment of the present invention, an electronic device is also disclosed, which comprises an organic electroluminescent device, and the specific structure of the organic electroluminescent device is as shown in any of the foregoing embodiments.

[0250] In combination with other materials

[0251] The materials for specific layers in the organic light-emitting devices described in the present invention can be used in combination with various other materials present in the devices. The combinations of these materials are described in detail in paragraphs 0132-0161 of US Patent Application US2016 / 0359122A1, the entire content of which is incorporated herein by reference. The materials described or mentioned therein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can easily consult the literature to identify other materials that can be used in combination.

[0252] The materials described herein as being specific layers that can be used in organic light-emitting devices can be used in combination with a variety of other materials present in the devices. For example, the compounds disclosed herein can be used in combination with a variety of light-emitting dopants, hosts, transport layers, blocking layers, injection layers, electrodes, and other layers that may be present. The combinations of these materials are described in detail in paragraphs 0080-0101 of US Patent Application US2015 / 0349273A1, the entire content of which is incorporated herein by reference. The materials described or mentioned therein are non-limiting examples of materials that can be used in combination with the compounds disclosed herein, and those skilled in the art can readily consult the literature to identify other materials that can be used in combination.

[0253] In the examples of material synthesis, unless otherwise stated, all reactions were carried out under nitrogen protection. All reaction solvents were anhydrous and used as received from commercial sources. The synthesized products were structurally confirmed and characterized using one or more conventional devices in the art, including but not limited to nuclear magnetic resonance spectrometers from Bruker, liquid chromatography, liquid chromatography-mass spectrometry, gas chromatography-mass spectrometry, differential scanning calorimeters from Shimadzu, fluorescence spectrometers from Shanghai Lingguang Technology, electrochemical workstations from Wuhan Koster, sublimators from Anhui Beike, etc., by methods well known to those skilled in the art. In the examples of devices, the characteristics of the devices were also tested using conventional devices in the art, including but not limited to evaporation coaters produced by AngstromEngineering, optical test systems and lifetime test systems produced by Suzhou FushiDa, ellipsometers produced by Beijing Liangtuo, etc., by methods well known to those skilled in the art. Since those skilled in the art are aware of the relevant content such as the use of the above devices and test methods and can obtain the inherent data of the samples determinately and without interference, the above relevant content will not be elaborated further in this patent.

[0254] Examples of material synthesis:

[0255] The preparation method of the compounds of the present invention is not limited. Typically but not restrictively, the following compounds are taken as examples, and their synthetic routes and preparation methods are as follows:

[0256] Synthesis Example 1: Synthesis of Compound A-1

[0257] Step 1: Synthesis of Intermediate 3

[0258]

[0259] Under nitrogen protection, intermediate 1 (6.64 g, 23.59 mmol), intermediate 2 (5.0 g, 23.59 mmol), tetrakis(triphenylphosphine)palladium (1.36 g, 1.18 mmol), potassium carbonate (6.52 g, 47.18 mmol), toluene (80 mL), ethanol (20 mL), and water (20 mL) were added to a three-necked flask and reacted overnight at 100 °C. After the reaction was completed, it was extracted with dichloromethane, the organic phase was washed with water, the solvent was concentrated and removed, and the crude product was purified by column chromatography with PE / DCM = 4 / 1 to obtain white solid intermediate 3 (7 g, yield: 80%).

[0260] Step 2: Synthesis of Compound A-1

[0261]

[0262] Under nitrogen protection, 3 (3.75 g, 10.17 mmol), intermediate 4 (3.00 g, 10.16 mmol), palladium acetate (114.01 mg, 0.50 mmol), 2-bis(cyclohexylphosphino)-2',6'-dimethoxybiphenyl (416.95 mg, 1.02 mmol), sodium tert-butoxide (1.95 g, 20.29 mmol), and xylene (60 mL) were added to a three-necked flask and reacted overnight at 140 °C. After the reaction was completed, it was extracted with dichloromethane, the organic phase was washed with water, the solvent was concentrated, and the crude product was purified by column chromatography with PE / DCM = 2 / 1 to obtain white solid A-1 (2.3 g, yield: 36%). The product was confirmed to be the target product with a molecular weight of 627.2.

[0263] Those skilled in the art should be aware that the above preparation method is only an exemplary example, and those skilled in the art can obtain other compound structures of the present invention by improving it.

[0264] Device Example 1

[0265] First, a glass substrate with a 120-nm-thick indium tin oxide (ITO) anode was cleaned and then treated with UV ozone and oxygen plasma. After the treatment, the substrate was dried in a nitrogen-filled glove box to remove moisture, and then the substrate was mounted on a substrate holder and loaded into a vacuum chamber. The following specified organic layers were sequentially evaporated onto the ITO anode by thermal vacuum at a rate of about 10 -8 Torr Compound HT and compound HI were co-evaporated and used as the hole injection layer (HIL, weight ratio 97:3) with a thickness of Compound HT was used as the hole transport layer (HTL) with a thickness of Compound EB is used as an electron blocking layer (EBL) with a thickness of Then, the compound A-1 of the present invention as the first host, the compound B-227 as the second host, and the compound RD as the dopant are co-evaporated to be used as the emitting layer (EML, weight ratio 58.8:39.2:2) with a thickness of Compound HB is used as a hole blocking layer (HBL) with a thickness of On the hole blocking layer, the compound ET and lithium 8-hydroxyquinoline (Liq) are co-evaporated as the electron transport layer (ETL, weight ratio 40:60) with a thickness of Finally, is evaporated Lithium 8-hydroxyquinoline (Liq) with a thickness of is used as the electron injection layer (EIL), and is evaporated Aluminum of is used as the cathode. Then, the device is transferred back to the glove box and encapsulated with a glass cover to complete the device.

[0266] Device Comparative Example 1

[0267] The implementation of Device Comparative Example 1 is the same as that of Device Example 1, except that compound C is used instead of the compound A-1 of the present invention as the first host in the emitting layer (EML).

[0268] The detailed device layer structure and thickness are shown in the following table. For the layers where more than one material is used, they are doped with different compounds in the recorded weight ratios.

[0269] Table 1 Partial device structures of device examples and comparative examples

[0270]

[0271]

[0272] The material structures used in the device are shown as follows:

[0273]

[0274] The maximum emission wavelength λ measured at a constant current density of 10 mA / cm 2 、power efficiency (PE), current efficiency (CE), external quantum efficiency (EQE), and the device lifetime (LT97) tested at a constant current of 80 mA / cm max are listed in Table 2. The device lifetime (LT97) refers to the time required for the device brightness to decay to 97% of its initial brightness. 2

[0275] Table 2 Device data

[0276] Device ID <![CDATA[λ max (nm)]]> LT97(h) CE [cd / A] PE [lm / W] EQE [%] Example 1 623 133.6 28.9 24.8 28.0 Comparative Example 1 623 60 28.8 24.6 27.6

[0277] Discussion:

[0278] As can be seen from the data in Table 2, the maximum emission wavelengths of the device examples and the device comparative examples are the same. In terms of current efficiency, power efficiency, and external quantum efficiency, Comparative Example 1 has reached a relatively high level, and Example 1 has further improvement on the basis of Comparative Example 1. Surprisingly, compared with Comparative Example 1, Example 1 has a significant increase in lifespan, and the increase rate reaches 123%. The above data indicate that the compound with the structure of Formula 1 in the present invention has better hole-transporting ability and stability in the device. While maintaining high efficiency, the lifespan of the device is significantly improved, and it can exhibit more excellent performance, having broad commercial development prospects and application values.

[0279] It should be understood that the various embodiments described herein are only examples and are not intended to limit the scope of the present invention. Therefore, as will be apparent to those skilled in the art, the claimed invention may include variations of the specific embodiments and preferred embodiments described herein. Many of the materials and structures described herein may be replaced with other materials and structures without departing from the spirit of the present invention. It should be understood that the various theories regarding why the present invention works are not intended to be restrictive.

Claims

1. A compound having the structure of Formula 1: Wherein, Z1 and Z2 are each independently selected from O, S, SiRR, Se or CRR; when two Rs are present, the two Rs are the same or different; X1 to X4, X8 to X 11 are each independently selected from C, N or CR, the same or different each time they appear x , and one of X1 to X4 is C and is connected to L2, and one of X8 to X 11 is C and is connected to L2; X5 to X7, X 12 to X 15 each occurrence is independently selected from N or CR x ; Y1 to Y9 are each independently selected from C, N or CR, the same or different each time they appear y ; Y 10 to Y 13 each occurrence being the same as or different from each other and independently selected from N or CR y ; L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted arylene having 6 - 30 carbon atoms, a substituted or unsubstituted heteroarylene having 3 - 30 carbon atoms, or a combination thereof; Ar is selected from a substituted or unsubstituted aryl having 6 - 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 30 carbon atoms, or a combination thereof; R, R x , R y Each occurrence is the same as or different from each other and is independently selected from the group consisting of hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof.

2. The compound according to claim 1, wherein, At least one of Z1 and Z2 is selected from O.

3. The compound according to claim 1, wherein, X1 to X4, X8 to X 11 each occurrence being the same as or different from each other and independently selected from C or CR x , X5 to X7, X 12 to X 15 each occurrence being the same as or different from each other and independently selected from CR x ; R x each occurrence independently is selected from the group consisting of hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof; Preferably, R x is the same or different each time it appears and is selected from the group consisting of hydrogen, deuterium, fluorine, phenyl, pyridyl, pyrimidinyl, naphthyl, biphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, group, methyl, ethyl, tert-butyl, adamantyl, cyclohexyl, cyclopentyl, and combinations thereof.

4. The compound according to claim 1, wherein, X1 or X2 is selected from C, X9 or X 10 is selected from C.

5. The compound according to claim 1, wherein, Y1 to Y9 are each independently selected from C or CR, each occurrence being the same or different y , Y 10 to Y 13 are each independently selected from CR, each occurrence being the same or different y ; R y each occurrence is the same or different and is selected from the group consisting of hydrogen, deuterium, a halogen, a substituted or unsubstituted alkyl having 1 to 20 carbon atoms, a substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, a substituted or unsubstituted aryl having 6 to 30 carbon atoms, a substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, and combinations thereof; Preferably, R y is the same or different each time it appears and is selected from the group consisting of hydrogen, deuterium, fluorine, phenyl, pyridyl, pyrimidinyl, naphthyl, biphenyl, phenanthryl, triphenylenyl, dibenzofuranyl, dibenzothiophenyl, carbazolyl, group, methyl, ethyl, tert-butyl, adamantyl, cyclohexyl, cyclopentyl, and combinations thereof.

6. The compound according to claim 1, wherein, Y2 or Y3 is selected from C, and Y6 or Y7 is selected from C.

7. The compound according to claim 1, wherein, Ar is selected from a substituted or unsubstituted aryl having 6 - 20 carbon atoms, a substituted or unsubstituted heteroaryl having 3 - 20 carbon atoms, or a combination thereof; Preferably, Ar is selected from a substituted or unsubstituted phenyl group, a substituted or unsubstituted naphthyl group, a substituted or unsubstituted biphenyl group, a substituted or unsubstituted terphenyl group, a substituted or unsubstituted phenanthryl group, a substituted or unsubstituted triphenylene group, a substituted or unsubstituted dibenzofuranyl group, a substituted or unsubstituted dibenzothiophenyl group, a substituted or unsubstituted dibenzoselenophenyl group, a substituted or unsubstituted silofluorene group, a substituted or unsubstituted fluorene group, a substituted or unsubstituted spirofluorene group, a substituted or unsubstituted spirosilofluorene group, a substituted or unsubstituted group, a substituted or unsubstituted pyridyl group, a substituted or unsubstituted pyrimidinyl group, a substituted or unsubstituted benzoxazolyl group, or a combination thereof; More preferably, Ar is selected from phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, triphenylene, dibenzofuranyl, dibenzothiophenyl, fluorenyl, silafuorenyl, group, benzoxazolyl, or a combination thereof.

8. The compound according to claim 1, wherein, L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted arylene having 6 - 20 carbon atoms, a substituted or unsubstituted heteroarylene having 3 - 20 carbon atoms, or a combination thereof; Preferably, L1 and L2 are each independently selected from a single bond, or a substituted or unsubstituted arylene having 6 - 20 carbon atoms; More preferably, L1 and L2 are each independently selected from a single bond, a substituted or unsubstituted phenylene, a substituted or unsubstituted biphenylene, a substituted or unsubstituted naphthylene.

9. The compound according to claim 1, wherein the compound is selected from the group consisting of: Optionally, the hydrogen in the structures of Compound A-1 to Compound A-302 can be partially or completely replaced by deuterium.

10. An organic electroluminescent device, comprising: Anode, Cathode, An organic layer disposed between the anode and the cathode, the organic layer comprising the compound according to any one of claims 1 to 9.

11. The organic electroluminescent device according to claim 10, wherein the organic layer is a light-emitting layer, a hole transport layer or an electron blocking layer; Preferably, the organic layer is a light-emitting layer, and the compound is a host material.

12. The organic electroluminescent device according to claim 11, wherein the organic layer is a light-emitting layer, and the organic layer further contains a second compound, the second compound is a host material, and the second compound has a structure represented by Formula 2: In Formula 2, L 21 to L 23each occurrence being the same as or different from one another and independently selected from a single bond, a substituted or unsubstituted alkylene having 1-20 carbon atoms, a substituted or unsubstituted cycloalkylene having 3-20 carbon atoms, a substituted or unsubstituted arylene having 6-30 carbon atoms, a substituted or unsubstituted heteroarylene having 3-30 carbon atoms, or a combination thereof; Ar 21 to Ar 23 each occurrence being the same as or different from one another and independently selected from a substituted or unsubstituted aryl having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl having 3-30 carbon atoms, or a combination thereof; Preferably, the second compound is selected from the group consisting of the following compounds: Optionally, the hydrogen in the structures of Compounds B-1 to B-255 can be partially or completely replaced by deuterium.

13. The organic electroluminescent device according to claim 10, wherein the organic layer is a light-emitting layer, and the light-emitting layer contains at least one phosphorescent light-emitting material.

14. The organic electroluminescent device according to claim 13, wherein the phosphorescent light-emitting material is a metal complex, and the metal complex has M(L a ) m (L b )n (L c ) q General formula of; M is selected from metals with a relative atomic mass greater than 40; L a , L b and L c are the first ligand, the second ligand, and the third ligand coordinated with the said M respectively; L a , L b and L c can optionally be connected to form a polydentate ligand; L a , L b and L c can be the same or different; m is 1, 2 or 3; n is 0, 1 or 2; q is 0, 1 or 2; the sum of m, n, and q is equal to the oxidation state of the said M; when m is greater than or equal to 2, multiple L a can be the same or different; when n is 2, two L b can be the same or different; when q is 2, two L c can be the same or different; L a is the same or different each time it appears and is selected from the structure shown in Formula 3: wherein, Ring D is selected from a 5 - membered heteroaryl ring or a 6 - membered heteroaryl ring; Ring E is selected from a 5 - membered unsaturated carbocyclic ring, a benzene ring, a 5 - membered heteroaryl ring or a 6 - membered heteroaryl ring; Ring D and ring E are fused via U a and U b fused; U a and U b are the same as or different from each other, each independently selected from C or N each time they appear; R d and R e each occurrence independently represents unsubstituted, mono-substituted, or poly-substituted, either identically or differently; V 31 to V 34 each occurrence being the same as or different from, independently selected from CR v3 or N; R d , R e and R v3 each occurrence, independently of one another, is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1 to 20 carbon atoms, substituted or unsubstituted cycloalkyl having 3 to 20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1 to 20 carbon atoms, substituted or unsubstituted heterocyclic group having 3 to 20 ring atoms, substituted or unsubstituted aralkyl having 7 to 30 carbon atoms, substituted or unsubstituted alkoxy having 1 to 20 carbon atoms, substituted or unsubstituted aryloxy having 6 to 30 carbon atoms, substituted or unsubstituted alkenyl having 2 to 20 carbon atoms, substituted or unsubstituted alkynyl having 2 to 20 carbon atoms, substituted or unsubstituted aryl having 6 to 30 carbon atoms, substituted or unsubstituted heteroaryl having 3 to 30 carbon atoms, substituted or unsubstituted alkylsilyl having 3 to 20 carbon atoms, substituted or unsubstituted arylsilyl having 6 to 20 carbon atoms, substituted or unsubstituted alkylgermyl having 3 to 20 carbon atoms, substituted or unsubstituted arylgermyl having 6 to 20 carbon atoms, substituted or unsubstituted amino having 0 to 20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxy, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof; Adjacent substituents R d , R e and R v3 can optionally be linked to form a ring; L b and L c each occurrence being the same as or different from any one of the following structures: Wherein, R a ,R b and R c each independently represents, when it appears each time, mono-substitution, poly-substitution, or no substitution; X b each occurrence is independently selected from the group consisting of O, S, Se, NR N1 and CR C1 R C2 ; X c and X d each occurrence of which is the same as or different from and is independently selected from the group consisting of O, S, Se and NR N2 ; R a ,R b ,R c ,R N1 ,R N2 ,R C1 and R C2 is the same as or different from each other each time it appears and is selected from the group consisting of: hydrogen, deuterium, halogen, substituted or unsubstituted alkyl having 1-20 carbon atoms, substituted or unsubstituted cycloalkyl having 3-20 ring carbon atoms, substituted or unsubstituted heteroalkyl having 1-20 carbon atoms, substituted or unsubstituted heterocyclic group having 3-20 ring atoms, substituted or unsubstituted aralkyl having 7-30 carbon atoms, substituted or unsubstituted alkoxy having 1-20 carbon atoms, substituted or unsubstituted aryloxy having 6-30 carbon atoms, substituted or unsubstituted alkenyl having 2-20 carbon atoms, substituted or unsubstituted alkynyl having 2-20 carbon atoms, substituted or unsubstituted aryl having 6-30 carbon atoms, substituted or unsubstituted heteroaryl having 3-30 carbon atoms, substituted or unsubstituted alkylsilyl having 3-20 carbon atoms, substituted or unsubstituted arylsilyl having 6-20 carbon atoms, substituted or unsubstituted alkylgermyl having 3-20 carbon atoms, substituted or unsubstituted arylgermyl having 6-20 carbon atoms, substituted or unsubstituted amino having 0-20 carbon atoms, acyl, carbonyl, carboxyl, ester, cyano, isocyano, hydroxyl, mercapto, sulfinyl, sulfonyl, phosphino, and combinations thereof; Adjacent substituents R a ,R b ,R c ,R N1 ,R N2 ,R C1 and R C2 can optionally be linked to form a ring.

15. A compound composition, which comprises the compound according to any one of claims 1 to 9.

16. The compound composition according to claim 15, which comprises a second compound having a structure represented by Formula 2: In Formula 2, L 21 to L 23 each occurrence is the same or different and is independently selected from a single bond, a substituted or unsubstituted alkylene having 1-20 carbon atoms, a substituted or unsubstituted cycloalkylene having 3-20 carbon atoms, a substituted or unsubstituted arylene having 6-30 carbon atoms, a substituted or unsubstituted heteroarylene having 3-30 carbon atoms, or a combination thereof; Ar 21 to Ar 23 each occurrence is the same or different and is independently selected from a substituted or unsubstituted aryl having 6-30 carbon atoms, a substituted or unsubstituted heteroaryl having 3-30 carbon atoms, or a combination thereof.

17. An electronic device comprising the organic electroluminescent device according to any one of claims 10 to 14.

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