Organic material composition and application thereof

Abstract

The invention relates to the technical field of display, in particular to an organic material composition and application thereof. The organic material composition comprises a first compound and a second compound, and the first compound and the second compound have the following structures: # imgabs0 # is beneficial to matching of HOMO and LUMO energy levels with adjacent energy levels through mutual cooperation of the first compound with the structure as shown in a formula (1) and the second compound with the structure as shown in a formula (2); the organic material composition has relatively high stability and relatively balanced carrier mobility, so that the organic electroluminescent device containing the material has relatively long service life, and also has relatively low driving voltage and relatively high efficiency.

Description

Technical Field

[0001] The present invention relates to the field of display technologies, and particularly to an organic material composition and its application. Background Art

[0002] An organic electroluminescent device (OLED) converts electrical energy into light by applying electricity to an organic electroluminescent material, and generally includes an anode, a cathode, and an organic layer formed between these two electrodes. The organic layer of the organic EL device may include a hole injection layer, a hole transport layer, a hole auxiliary layer, a light-emitting auxiliary layer, an electron blocking layer, a light-emitting layer (containing a host material and a dopant material), an electron buffer layer, a hole blocking layer, an electron transport layer, an electron injection layer, etc. The materials used in the organic layer can be classified into hole injection materials, hole transport materials, hole auxiliary materials, light-emitting auxiliary materials, electron blocking materials, light-emitting materials, electron buffer materials, hole blocking materials, electron transport materials, electron injection materials, etc. depending on their functions. In an organic EL device, holes from the anode and electrons from the cathode are injected into the light-emitting layer by applying a voltage, and excitons with high energy are generated by the recombination of holes and electrons. The organic light-emitting compound emits light by the energy moving to the excited state and the energy when the organic light-emitting compound returns from the excited state to the ground state.

[0003] Currently, due to reasons such as low stability and unbalanced carrier mobility of the functional materials composed of existing organic light-emitting compounds, there are problems of high driving voltage and short lifespan of organic electroluminescent diodes, severely limiting the application of organic electroluminescent diodes. Summary of the Invention

[0004] The object of the present invention is to overcome the defects that the functional materials composed of existing organic light-emitting compounds have problems such as low stability and unbalanced carrier mobility, resulting in high driving voltage and short lifespan of organic electroluminescent diodes, severely limiting the application of organic electroluminescent diodes, and further provide an organic electroluminescent material and its application.

[0005] Definition of substituent terms in the present invention:

[0006] As used in the present invention, the term "halogen" may include fluorine, chlorine, bromine, or iodine.

[0007] As used in the present invention, the term "C1-C30 alkyl" refers to a monovalent substituent derived from a straight-chain or branched-chain saturated hydrocarbon having 1 to 30 carbon atoms, and its examples include but are not limited to methyl, ethyl, propyl, isobutyl, sec-butyl, tert-butyl, pentyl, isopentyl, and hexyl.

[0008] As used in the present invention, the term "C3-C30 cycloalkyl" refers to a monocyclic hydrocarbon or polycyclic hydrocarbon derived from a hydrocarbon having 1 to 30 ring backbone carbon atoms, and the cycloalkane may include cyclopropyl, cyclobutyl, adamantyl, etc.

[0009] In the present invention, aryl and arylene include monocyclic, polycyclic or fused-ring aryl, and the rings may be interrupted by short non-aromatic units and may include a spiro structure. Aryl includes, but is not limited to, phenyl, biphenyl, terphenyl, naphthyl, phenanthryl, anthryl, fluorenyl, spirobifluorenyl, etc., and arylene includes, but is not limited to, phenylene, biphenylene, terphenylene, naphthylene, phenanthrylene, anthrylene, fluorenylene, spirobifluorenylene, etc.

[0010] In the present invention, heteroaryl and heteroarylene include monocyclic, polycyclic or fused-ring heteroaryl, and the rings may be interrupted by short non-aromatic units. The heteroatoms include nitrogen, oxygen and sulfur. Heteroaryl includes, but is not limited to, furyl, phenylthio, pyrrolyl, imidazolyl, pyrazolyl, thiazolyl, thiadiazolyl, isothiazolyl, isoxazolyl, oxazolyl, oxadiazolyl, triazinyl, tetrazinyl, triazolyl, tetrazolyl, furazanyl, pyridyl, pyrazinyl, pyrimidinyl, pyridazinyl, benzofuryl, benzothienyl, isobenzofuryl, dibenzofuryl, dibenzothienyl, benzimidazolyl, benzothiazolyl, benzoisothiazolyl, benzoisoxazolyl, benzoxazolyl, isoindolyl, indolyl, indazolyl, benzothiadiazolyl, quinolinyl, isoquinolinyl, cinnolinyl, quinazolinyl, quinoxalinyl, carbazolyl, phenoxazinyl, phenothiazinyl, phenanthridinyl, benzodioxolyl, dihydroacridinyl, and their derivatives, etc.; heteroarylene includes, but is not limited to, furylene, phenylthiolene, pyrrolylene, imidazolylene, pyrazolylene, thiazolylene, thiadiazolylene, isothiazolylene, isoxazolylene, oxazolylene, oxadiazolylene, triazinylene, tetrazinylene, triazolylene, tetrazolylene, furazanylene, pyridinylene, pyrazinylene, pyrimidinylene, pyridazinylene, benzofurylene, benzothienylene, isobenzofurylene, dibenzofurylene, dibenzothienylene, benzimidazolylene, benzothiazolylene, benzoisothiazolylene, benzoisoxazolylene, benzoxazolylene, isoindolylene, indolylene, indazolylene, benzothiadiazolylene, quinolinylene, isoquinolinylene, cinnolinylene, quinazolinylene, quinoxalinylene, carbazolylene, phenoxazinylene, phenothiazinylene, phenanthridinylene, benzodioxolylene, dihydroacridinylene, and their derivatives, etc.

[0011] As used in the present invention, the term "substituted" means that a hydrogen atom in a compound is replaced by another substituent. The position is not limited to a specific position as long as the hydrogen at that position can be replaced by a substituent. When there are two or more substituents, the two or more substituents may be the same or different.

[0012] As used in the present invention, unless otherwise specified, a hydrogen atom includes protium, deuterium, and tritium.

[0013] In the present invention, in the definition of a group, a range of carbon atom numbers is defined, and the number of carbon atoms is any integer within the defined range. For example, C6-C30 aryl means that the number of carbon atoms in the aryl can be any integer within the range of 6-60, such as 6, 8, 10, 13, 15, 17, 20, 22, 25, or 30, etc.

[0014] The solution adopted in the present invention is as follows:

[0015] The present invention provides an organic material composition, which comprises a first compound and a second compound. The first compound has the structure shown in formula (1):

[0016]

[0017] Wherein, X is selected from O, S;

[0018] L’, L 1’ , L 2’ are each independently selected from a linking bond, a substituted or unsubstituted C6-C30 arylene, a substituted or unsubstituted C3-C30 heteroarylene;

[0019] Ar 1’ , Ar 2’ , Ar are each independently selected from hydrogen, deuterium, halogen, cyano, a substituted or unsubstituted C6-C60 aryl, a substituted or unsubstituted C6-C60 arylamino, a substituted or unsubstituted C3-C60 heteroarylamino, a substituted or unsubstituted C3-C60 heteroaryl;

[0020] The second compound has the structure shown in formula (2):

[0021]

[0022] Wherein, X 1 -X 14 are each independently selected from N or CR, and R is selected from hydrogen, deuterium, a C6-C30 aryl;

[0023] L is independently selected from a linking bond, a substituted or unsubstituted C6-C30 arylene, a substituted or unsubstituted C3-C30 heteroarylene;

[0024] Ar 3 , Ar 4 are each independently selected from a substituted or unsubstituted C6-C30 aryl, a substituted or unsubstituted C3-C30 heteroaryl;

[0025] The substituents in the substituted C6-C30 arylene group, substituted C3-C30 heteroarylene group, substituted C6-C60 aryl group, substituted C6-C60 arylamino group, substituted C3-C60 heteroarylamino group, and substituted C3-C60 heteroaryl group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl group, C3-C30 cycloalkyl group, C6-C30 aryl group, C3-C30 heteroaryl group, C6-C60 arylamino group, and C3-C60 heteroarylamino group.

[0026] Preferably, in the formula (1), Ar 1’ , Ar 2’ , and Ar are each independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C6-C15 aryl group, substituted or unsubstituted C6-C18 arylamino group, substituted or unsubstituted C3-C18 heteroarylamino group, and substituted or unsubstituted C3-C18 heteroaryl group;

[0027] Among them, the substituents in the substituted C6-C15 aryl group, substituted C6-C18 arylamino group, substituted C3-C18 heteroarylamino group, and substituted C3-C18 heteroaryl group are each independently selected from one or a combination of at least two of C1-C6 alkyl group, C3-C12 cycloalkyl group, C6-C25 aryl group, C3-C25 heteroaryl group, C6-C60 arylamino group, and C3-C60 heteroarylamino group;

[0028] Preferably, the said Ar 1’ , Ar 2’ , and Ar are each independently selected from hydrogen, deuterium, halogen, substituted or unsubstituted E group, where the E group is selected from the following groups: phenyl, naphthyl, biphenyl, phenanthryl, fluoranthenyl, -yl, terphenyl, triphenylene, phenylnaphthyl, naphthylphenyl, dimethylfluorenyl, phenylmethylfluorenyl, diphenylfluorenyl, pyridyl, pyridylphenyl, phenylpyridyl, spirobifluorenyl, benzo-dimethylfluorenyl, benzo-diphenylfluorenyl, benzospirobifluorenyl, dibenzofuranyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzothiophenyl, diphenylamino;

[0029] Among them, the substituents of the substituted E group are each independently selected from one or a combination of at least two of C1-C6 alkyl group, C3-C12 cycloalkyl group, C6-C25 aryl group, C3-C25 heteroaryl group, C6-C60 arylamino group, and C3-C60 heteroarylamino group;

[0030] Preferably, Ar 1’ -Ar 2’ are each independently selected from phenyl, naphthyl, biphenyl, a base, terphenyl, phenylnaphthyl, naphthylphenyl, dimethylfluorenyl, diphenylfluorenyl, pyridyl, pyridylphenyl, phenylpyridyl, phenylcarbazolyl, phenylbenzo[h]carbazolyl, phenylphenanthro[9,10-b]carbazolyl, spirobifluorenyl, spiro[fluorene-9,9'-xanthene]yl, phenylmethylfluorenyl, dibenzofuranyl, benzonaphthofuranyl, diphenylamino;

[0031] Preferably, Ar is selected from phenyl or naphthyl;

[0032] Said Ar 1’ and Ar 2’ are each independently selected from phenyl, naphthyl, dibenzofuranyl, benzonaphthofuranyl, diphenylamino;

[0033] Preferably, L', L 1’ and L 2’ are each independently selected from a linking bond, a substituted or unsubstituted C6-C12 arylene, a substituted or unsubstituted C3-C12 heteroarylene;

[0034] The substituents of the substituted C6-C12 arylene and the substituted C3-C12 heteroarylene are each independently selected from one or a combination of at least two of C1-C6 alkyl, C3-C12 cycloalkyl, C6-C25 aryl, C3-C25 heteroaryl, C6-C60 arylamino, and C3-C60 heteroarylamino;

[0035] Preferably, L' is selected from naphthylene;

[0036] Preferably, L 1’ and L 2’ are each independently selected from a linking bond, phenylene, naphthylene;

[0037] Preferably, X is selected from O.

[0038] Preferably, the first compound has a structure shown in any one of N-1 to N-654 as follows:

[0039]

[0040]

[0041]

[0042]

[0043]

[0044]

[0045]

[0046]

[0047]

[0048]

[0049]

[0050]

[0051]

[0052]

[0053]

[0054]

[0055]

[0056]

[0057]

[0058]

[0059]

[0060]

[0061]

[0062]

[0063]

[0064]

[0065]

[0066]

[0067]

[0068]

[0069] Preferably, in the formula (2), X 1 -X 14 are all selected from CR, where R is defined as above;

[0070] Preferably, X 1 -X6 Any one of them is selected from N, and the rest are CR, where R is defined as above;

[0071] Preferably, X 1 -X 6 Any one of them is selected from N, and the rest are CR; X 7 -X 14 Any one of them is selected from N, and the rest are CR, where R is defined as above;

[0072] Preferably, R is selected from hydrogen, deuterium, phenyl, naphthyl;

[0073] Ar 3 , Ar 4 Each is independently selected from a substituted or unsubstituted C6-C15 aryl group, a substituted or unsubstituted C3-C20 heteroaryl group;

[0074] The substituents in the substituted C6-C15 aryl group and the substituted C3-C20 heteroaryl group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl group, C3-C30 cycloalkyl group, C6-C30 aryl group, C3-C30 heteroaryl group, C6-C60 arylamino group, C3-C60 heteroarylamino group;

[0075] Preferably, Ar 3 , Ar 4 Each is independently selected from a substituted or unsubstituted A group;

[0076] The A group includes: phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, fluoranthenyl, triphenylene, fluorene, dimethylfluorene, diphenylfluorene, spirobifluorene, benzodimethylfluorene, benzodiphenylfluorene, benzospirobifluorene, benzofuran, dibenzofuran, naphthobenzofuran, dinaphthofuran, benzothiophene, dibenzothiophene, naphthobenzothiophene, carbazole, phenylcarbazole, benzophenylcarbazole, dibenzophenylcarbazole, biphenylcarbazole, phenanthrobenzofuran, dibenzofuranofuran, phenylcarbazolebenzofuran;

[0077] Among them, the substituents of the substituted A group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl group, C3-C30 cycloalkyl group, C6-C30 aryl group, C3-C30 heteroaryl group, C6-C60 arylamino group, C3-C60 heteroarylamino group;

[0078] Preferably, Ar 3 , Ar 4Each is independently selected from phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, fluoranthenyl, triphenylene, fluorenyl, dimethylfluorenyl, diphenylfluorenyl, spirobifluorenyl, benzodimethylfluorenyl, benzodiphenylfluorenyl, benzospirobifluorenyl, dibenzofuranyl, naphthobenzofuranyl, dibenzothiophenyl, naphthobenzothiophenyl, carbazolyl, phenylcarbazolyl, benzocarbazolyl, dibenzocarbazolyl, a phenyl substituted with one deuterium, a phenyl substituted with two deuteriums, a naphthyl substituted with one deuterium, a naphthyl substituted with two deuteriums;

[0079] Preferably, each L is independently selected from a linking bond, a substituted or unsubstituted C6-C18 arylene group;

[0080] The substituents in the substituted C6-C18 arylene group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl, C3-C30 cycloalkyl, C6-C30 aryl, C3-C30 heteroaryl, C6-C60 arylamine group, C3-C60 heteroarylamine group;

[0081] Preferably, L is selected from a linking bond, phenylene.

[0082] Preferably, the second compound has a structure shown in any one of Formulas 2-1 to 2-28:

[0083]

[0084]

[0085]

[0086] Preferably, X 1 -X 14 、Ar 3 、Ar 4 are as defined above;

[0087] Preferably, the second compound has a structure shown in Formula 2-4 or Formula 2-5;

[0088] Preferably, the second compound has any one of the structures of Formula 2-6, Formula 2-22, Formula 2-25, Formula 2-26, Formula 2-27, Formula 2-28, Formula 2-8 to Formula 2-20.

[0089] Preferably, the second compound has a structure shown in any one of M-1 to M-723:

[0090]

[0091]

[0092]

[0093]

[0094]

[0095]

[0096]

[0097]

[0098]

[0099]

[0100]

[0101]

[0102]

[0103]

[0104]

[0105]

[0106]

[0107]

[0108] Preferably, in the material composition, the mass ratio of the first compound to the second compound is 1:9 - 9:1;

[0109] Preferably, in the material composition, the mass ratio of the first compound to the second compound is 2:8 - 8:2;

[0110] More preferably, in the material composition, the mass ratio of the first compound to the second compound is 3:7 - 7:3;

[0111] Further preferably, in the material composition, the mass ratio of the first compound to the second compound is 4:6 - 6:4.

[0112] The present invention provides an organic electroluminescent host material composition comprising the above-mentioned organic material composition.

[0113] The present invention also provides the use of the above-mentioned organic material composition or the above-mentioned organic electroluminescent host material composition in an optical device;

[0114] Preferably, the optical device includes an organic electroluminescent device.

[0115] The present invention also provides an organic electroluminescent device, which includes an anode and a cathode, and an organic layer disposed between the anode and the cathode. The organic layer includes the above-mentioned organic material composition or the above-mentioned organic electroluminescent host material composition; preferably, the organic layer includes a light-emitting layer, and the light-emitting layer includes the above-mentioned organic material composition or the above-mentioned organic electroluminescent host material composition.

[0116] Preferably, the organic layer includes a hole injection layer, a hole transport layer, an electron blocking layer, a light-emitting layer, a hole blocking layer, an electron transport layer, and an electron injection layer that are sequentially stacked from the anode side to the cathode side;

[0117] Preferably, the material of the light-emitting layer includes a host material and a guest material, and the light-emitting layer includes the above-mentioned organic material composition or the above-mentioned organic electroluminescent host material composition.

[0118] Preferably, the guest material includes a phosphorescent dopant, and the phosphorescent dopant includes a transition metal-containing complex.

[0119] The present invention also provides an organic electroluminescent device, including the above-mentioned organic electroluminescent device.

[0120] The term "organic electroluminescent material" in the present invention means a material that can be used in an organic electroluminescent device and can contain at least one compound. If necessary, the organic electroluminescent material can be included in any layer constituting the organic electroluminescent device. For example, the organic electroluminescent material can be a hole injection material, a hole transport material, a hole assisting material, a light-emitting assisting material, an electron blocking material, a light-emitting material (including an organic electroluminescent host material and a dopant material), an electron buffering material, a hole blocking material, an electron transport material, an electron injection material, etc.

[0121] An organic electroluminescent material disclosed in the present invention may include one organic electroluminescent material or may include multiple organic electroluminescent materials. Herein, multiple organic electroluminescent materials refer to materials comprising a combination of at least two organic electroluminescent materials, and such materials may be included in any layer constituting an organic electroluminescent device. It may refer to both materials before an organic electroluminescent device (e.g., before vapor deposition) and materials after an organic electroluminescent device (e.g., after vapor deposition). For example, the material may be a combination of at least two compositions, and the compositions may be included in at least one of the following: hole injection layer, hole transport layer, hole assisting layer, light emission assisting layer, electron blocking layer, light emitting layer, electron buffer layer, hole blocking layer, electron transport layer, and electron injection layer. Two compositions in the multiple organic electroluminescent materials may be included in the same layer or different layers, and may be co-evaporated by mixing or co-evaporation, or may be evaporated individually.

[0122] The term "organic electroluminescent host material composition" disclosed in the present invention refers to an organic electroluminescent material comprising a combination of at least two host materials. It may refer to both materials before in an organic electroluminescent device (e.g., before vapor deposition) and materials after in an organic electroluminescent device (e.g., after vapor deposition). The composition disclosed in the present invention may be included in any light emitting layer constituting an organic electroluminescent device. Two or more compounds among the multiple host materials included in the composition disclosed in the present invention may be included in one light emitting layer or may be separately included in different light emitting layers. For example: when two or more host materials are included in one layer, the layer may be formed by co-evaporation by mixing or may be formed simultaneously by separate co-evaporation.

[0123] Advantages of the present invention:

[0124] The organic material composition of the present invention, the organic material composition includes a first compound and a second compound, the first compound has a structure shown in formula (1), and the second compound has a structure shown in formula (2); the cooperation between the first compound having the structure shown in formula (1) and the second compound having the structure shown in formula (2) is beneficial to the matching of HOMO and LUMO energy levels with adjacent energy levels, enabling the organic material composition to obtain higher stability and relatively balanced carrier mobilities, thereby enabling the organic electroluminescent device containing this material to have more excellent lifespan, and also having a lower driving voltage and higher efficiency. Description of the drawings

[0125] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0126] Figure 1 It is the structural diagram of the organic electroluminescent device in the device embodiment of the present invention;

[0127] Among them, 1 - substrate; 2 - anode; 3 - hole injection layer; 4 - hole transport layer; 5 - light emitting layer; 6 - electron transport layer; 7 - electron injection layer; 8 - cathode. Specific Embodiments

[0128] The following embodiments are provided to better further understand the present invention, which is not limited to the best embodiment, and does not limit the content and protection scope of the present invention. Any product that is the same as or similar to the present invention obtained by anyone under the inspiration of the present invention or by combining the features of the present invention with other prior art features falls within the protection scope of the present invention.

[0129] For those not specifying specific experimental steps or conditions in the embodiments, the operations or conditions of the conventional experimental steps described in the literature in this field can be followed. For the reagents or instruments not indicating the manufacturer, they are all conventional reagent products that can be obtained through commercial purchase.

[0130] Synthesis of Intermediate:

[0131] Synthesis of Intermediate N1 - A

[0132]

[0133] After purging the three - neck reaction flask equipped with a mechanical stirrer, a thermometer, and a condenser with nitrogen, successively add intermediate N1 - A - a (10 mmol), intermediate N1 - A - b (10 mmol), 100 mL of toluene, 20 mL of ethanol, 20 mL of water, add potassium carbonate (20 mmol), Pd(PPh 3 ) 4(0.05 mmol), heated to 70 - 80 °C, reacted for 3 h. Cooled to 25 - 30 °C, 100 mL of water and 100 mL of toluene were added, stirred and separated by liquid. The aqueous phase was extracted once with 100 mL of toluene, separated, and the organic phases were combined. 7 g of anhydrous sodium sulfate was added to the organic phase, stirred and dried, filtered, and the organic phase was concentrated (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flowed out. 50 mL of a mixed solvent of dichloromethane and petroleum ether was added with stirring, cooled to 0 - 5 °C, filtered to obtain compound N1-A, with a yield of 67%.

[0134] Elemental analysis: C 23 H 14 Theoretical values for ClNO: C, 77.64; H, 3.97; Cl, 9.96; N, 3.94; O, 4.50; Measured values: C, 77.59; H, 3.98; Cl, 9.95; N, 3.98;

[0135] HRMS(ESI) m / z [M + H] + : Theoretical value: 355.08; Measured value: 356.32.

[0136] The preparation of intermediates N2-A - N12-A is the same as the preparation steps of N1-A, except that brominated and chlorinated raw materials with different substitution sites from N1-A-a are used to replace N1-A-a and borate ester raw materials with different substitution sites from N1-A-b are used to replace N1-A-b:

[0137]

[0138]

[0139] Synthetic route of intermediate N13-A

[0140]

[0141] After purging the three-necked reaction flask equipped with a mechanical stirrer, thermometer, and condenser with nitrogen, intermediate N13-A-a (10 mmol), intermediate N13-A-b (10 mmol), 100 mL of toluene, 20 mL of ethanol, 20 mL of water, potassium carbonate (20 mmol), and Pd(PPh 3 ) 4(0.05 mmol) was heated to 70 °C and reacted for 3 h. The temperature was lowered to 25 - 30 °C, 100 mL of water was slowly added, and 100 mL of toluene was added and stirred for liquid separation. The aqueous phase was extracted once with 100 mL of toluene, and after liquid separation, the organic phases were combined. The organic phase was washed with water multiple times until neutral, then 7 g of anhydrous sodium sulfate was added and stirred for drying. After filtration, the organic phase was concentrated (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flowed out. 50 mL of a mixed solvent of dichloromethane and petroleum ether was added with stirring, and the temperature was lowered to 0 - 5 °C. After filtration, compound N13-A was obtained with a yield of 72%.

[0142] Elemental analysis: C 27 H 16 Theoretical values for ClNO: C, 79.90; H, 3.97; Cl, 8.73; N, 3.45; O, 3.94; Measured values: C, 79.90; H, 3.97; Cl, 8.73; N, 3.45; O, 3.94;

[0143] HRMS (ESI) m / z [M + H] + : Theoretical value: 405.09; Measured value: 406.12.

[0144] Example 1

[0145] This example provides compound N-5 in an organic material composition, and its preparation method includes the following steps:

[0146]

[0147] After purging the three-neck reaction flask equipped with a mechanical stirrer, thermometer, and condenser with nitrogen, intermediate N6-B (10 mmol), intermediate N1-A (10 mmol), and 100 mL of toluene were successively added. The mixture was heated under reflux to separate water for 0.5 h, then the temperature was lowered to 70 - 80 °C, and sodium tert-butoxide (15 mmol), Pd 2 (dba) 3 (0.05 mmol), and s-phos (0.1 mmol) were slowly added. After the system was stable, it was heated to 100 - 110 °C and reacted for 3 h. The temperature was lowered to 25 - 30 °C, 100 mL of water was added, and 100 mL of toluene was added and stirred for liquid separation. The aqueous phase was extracted once with 100 mL of toluene, and after liquid separation, the organic phases were combined. 7 g of anhydrous sodium sulfate was added to the organic phase and stirred for drying. After filtration, the organic phase was concentrated (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flowed out. 20 mL of petroleum ether was added with stirring, and the temperature was lowered to 0 - 5 °C. After filtration, compound N-5 was obtained with a yield of 66%.

[0148] Elemental analysis: C 41 H 26 N 2 O 2Theoretical values: C, 85.10; H, 4.53; N, 4.84; O, 5.53; Measured values: C, 85.10; H, 4.53; N, 4.84; O, 5.53;

[0149] HRMS(ESI) m / z [M+H] + : Theoretical value: 578.20; Measured value: 579.25.

[0150] Example 2

[0151] This example provides a compound N-16 in an organic material composition, and its preparation method includes the following steps:

[0152]

[0153] After replacing the nitrogen in a three-necked reaction flask equipped with mechanical stirring, a thermometer, and a condenser, add intermediate N16-B (10 mmol), intermediate N16-A (10 mmol), and 100 mL of toluene in sequence. Heat under reflux to separate water for 0.5 h, cool down to 70 - 80 °C, and slowly add sodium tert-butoxide (15 mmol), Pd 2 (dba) 3 (0.05 mmol), s-phos (0.1 mmol). After the system is stable, heat to 100 - 110 °C and react for 3 h. Cool down to 25 - 30 °C, add 100 mL of water and 100 mL of toluene, stir and separate the layers. Extract the aqueous phase with 100 mL of toluene once, separate the layers, combine the organic phases. Add 7 g of anhydrous sodium sulfate to the organic phases, stir and dry, filter. Concentrate the organic phases (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flows out, stir and add 20 mL of petroleum ether, cool down to 0 - 5 °C, filter to obtain compound N-16 with a yield of 61%.

[0154] Elemental analysis: C 51 H 32 N 2 O 2 Theoretical values: C, 85.97; H, 4.49; N, 4.46; O, 5.09; Measured values: C, 85.94; H, 4.50; N, 4.48; HRMS(ESI) m / z [M+H] + : Theoretical value: 628.22; Measured value: 629.25.

[0155] Example 3

[0156] This example provides a compound N-18 in an organic material composition, and its preparation method includes the following steps:

[0157]

[0158] After purging the three-necked reaction flask equipped with a mechanical stirrer, a thermometer, and a condenser with nitrogen, intermediate N18-B (10 mmol), intermediate N1-A (10 mmol), and 100 mL of toluene were added successively. The mixture was heated under reflux to separate water for 0.5 h, then cooled to 70 - 80 °C, and sodium tert-butoxide (15 mmol), Pd 2 (dba) 3 (0.05 mmol), and s-phos (0.1 mmol) were slowly added. After the system stabilized, it was heated to 100 - 110 °C and reacted for 3 h. It was cooled to 25 - 30 °C, 100 mL of water and 100 mL of toluene were added, and the mixture was stirred and separated. The aqueous phase was extracted once with 100 mL of toluene, separated, and the organic phases were combined. 7 g of anhydrous sodium sulfate was added to the organic phase, stirred and dried, filtered, and the organic phase was concentrated (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flowed out. 20 mL of petroleum ether was added with stirring, and the mixture was cooled to 0 - 5 °C and filtered to obtain compound N-18 with a yield of 61%.

[0159] Elemental analysis: C 53 H 37 N 3 Theoretical values: C, 86.98; H, 5.10; N, 5.74; O, 2.19; Measured values: C, 87.00; H, 5.11; N, 5.70;

[0160] HRMS (ESI) m / z [M + H] + : Theoretical value: 731.29; Measured value: 732.15.

[0161] Example 4

[0162] This example provides compound N-45 in an organic material composition, and its preparation method includes the following steps:

[0163]

[0164] After purging the three-necked reaction flask equipped with a mechanical stirrer, a thermometer, and a condenser with nitrogen, intermediate N45-B (10 mmol), intermediate N1-A (10 mmol), and 100 mL of toluene were added successively. The mixture was heated under reflux to separate water for 0.5 h, then cooled to 70 - 80 °C, and sodium tert-butoxide (15 mmol), Pd 2 (dba) 3(0.05 mmol), s-phos (0.1 mmol). After the system is stabilized, heat it to 100 - 110 °C and react for 3 h. Cool down to 25 - 30 °C, add 100 mL of water and 100 mL of toluene, stir and separate the liquid. Extract the aqueous phase once with 100 mL of toluene, separate the liquid, combine the organic phases. Add 7 g of anhydrous sodium sulfate to the organic phases, stir and dry, filter. Concentrate the organic phases (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flows out. Stir and add 20 mL of petroleum ether, cool down to 0 - 5 °C, filter to obtain compound N-45 with a yield of 65%.

[0165] Elemental analysis: C 49 H 32 N 2 Theoretical values: C, 88.53; H, 4.85; N, 4.21; O, 2.41; Measured values: C, 88.49; H, 4.86; N, 4.24; HRMS (ESI) m / z [M + H] + : Theoretical value: 664.25; Measured value: 665.19.

[0166] Example 5

[0167] This example provides compound N-130 in an organic material composition, and its preparation method includes the following steps:

[0168]

[0169] After purging the three-neck reaction flask equipped with a mechanical stirrer, thermometer, and condenser with nitrogen, successively add intermediate N130-B (10 mmol), intermediate N4-A (10 mmol), 100 mL of toluene, heat under reflux to separate water for 0.5 h, cool down to 70 - 80 °C, slowly add sodium tert-butoxide (15 mmol), Pd 2 (dba) 3 (0.05 mmol), s-phos (0.1 mmol). After the system is stabilized, heat it to 100 - 110 °C and react for 3 h. Cool down to 25 - 30 °C, add 100 mL of water and 100 mL of toluene, stir and separate the liquid. Extract the aqueous phase once with 100 mL of toluene, separate the liquid, combine the organic phases. Add 7 g of anhydrous sodium sulfate to the organic phases, stir and dry, filter. Concentrate the organic phases (-0.08 - 0.09 MPa, 55 - 60 °C) until no liquid flows out. Stir and add 20 mL of petroleum ether, cool down to 0 - 5 °C, filter to obtain compound N-130 with a yield of 65%.

[0170] Elemental analysis: C 47 H 30 N 2 O 2Theoretical values: C, 86.22; H, 4.62; N, 4.28; O, 4.89; Measured values: C, 86.20; H, 4.61; N, 4.31; HRMS(ESI) m / z [M+H] + : Theoretical value: 654.23; Measured value: 655.28

[0171] Example 6

[0172] This example provides a compound M-17 in an organic material composition, and its preparation method includes the following steps:

[0173]

[0174] Take a 50-milliliter two-necked round-bottom flask, place a magnetic stir bar in it and connect a reflux condenser above. After drying, fill it with nitrogen. Add compound M17-A (19.8 mmol, CAS: 1884145-03-2), M17-B (20.75 mmol, CAS: 1883265-32-4), tetrakis(triphenylphosphine)palladium(0) (0.396 mmol), potassium carbonate (39.6 mmol), 35 milliliters of toluene, 15 milliliters of ethanol and 15 milliliters of distilled water, and stir the mixture at 90 °C for 8 hours. After the reaction is completed, add the mixture dropwise to methanol, and filter the resulting solid. Purify the resulting solid by column chromatography to obtain compound M-17 (8.5 g, yield: 75%).

[0175] Elemental analysis: C 41 H 25 N 3 O; Theoretical values: C, 85.54; H, 4.38; N, 7.30; O, 2.78; Measured values: C, 85.52; H, 4.38; N, 7.32; HRMS(ESI) m / z (M+): Theoretical value: 575.20; Measured value: 576.34

[0176] Example 7

[0177] This example provides a compound M-296 in an organic material composition, and its preparation method includes the following steps:

[0178] (I) Synthesis of intermediate M296-A, and the synthesis route is as follows:

[0179]

[0180] Add intermediate M296-1 (2-bromoquinoline, CAS: 2005-43-8, 20 g) and 200 mL of anhydrous tetrahydrofuran to a 250 mL three-necked flask equipped with a thermometer and magnetic stirring. Under nitrogen protection, cool the temperature to -78 °C, and dropwise add n-butyllithium (1.6 M, 45.2 mL) while controlling the temperature. After the addition, stir for 1 h, then dropwise add triisopropyl borate (19.52 g) while controlling the temperature at -78 °C. After the addition, transfer the reaction mixture to room temperature and react for 12 h. Dropwise add hydrochloric acid solution (6.5 mL of 36% concentrated hydrochloric acid + 24 mL of water). Add 50 mL of ethyl acetate to the reaction solution, extract and separate with 25 mL of water. Rotate the organic phase to dryness, add 50 mL of n-hexane, reflux and stir for 1 h, filter at room temperature, and dry to obtain intermediate M296-2, 15 g.

[0181] Add intermediate M296-2 (15 g), intermediate 7-bromo-1-chloronaphthalene (21.9 g), potassium carbonate (16.6 g) and tetrakis(triphenylphosphine)palladium (2.0 g) to a 250 mL three-necked flask equipped with a thermometer and magnetic stirring. Add toluene (80 mL), ethanol (35 mL) and water (35 mL). Under nitrogen protection, heat to 85 °C and react for 6 h. Add 50 mL of ethyl acetate and 25 mL of water to the reaction solution for extraction and separation. Stir the organic phase and pass it through a column to obtain intermediate M296-3, 15 g.

[0182] Add intermediate M296-3 (15 g), bis(pinacolato)diboron (15.8 g), potassium acetate (10 g) and Pd(dppf)Cl 2 (0.64 g) to a 250 mL three-necked flask equipped with a thermometer and magnetic stirring. Add 1,4-dioxane (150 mL). Under nitrogen protection, heat to 110 °C and react for 4 h. Add 100 mL of toluene and 100 mL of water to the reaction solution for extraction and separation. Stir the organic phase and pass it through a column to obtain intermediate M296-A, 16 g.

[0183] (2) Synthesis of compound M-296. The synthesis route is as follows:

[0184]

[0185] Add intermediate M296-A (16 g), intermediate M296-B (2-chloro-4,6-diphenyl-1,3,5-triazine, CAS: 3842-55-5, 11.2 g), potassium carbonate (11.6 g) and tetrakis(triphenylphosphine)palladium (1.3 g) to a 250 mL three-necked flask equipped with a thermometer and magnetic stirring. Add toluene (110 mL), ethanol (50 mL) and water (50 mL). Under nitrogen protection, heat to 85 °C and react for 6 h. Add water and ethanol to the reaction solution at room temperature for filtration, and dry to obtain product M296, 16 g (yield 78%).

[0186] Elemental analysis: C 34H 22 N 4 Theoretical values: C, 83.93; H, 4.56; N, 11.51; Measured values: C, 83.95; H, 4.56; N, 11.49; HRMS(ESI) m / z (M+): Theoretical value: 486.18; Measured value: 487.12.

[0187] Example 8 - 35

[0188] A method for preparing the provided compounds M - 76, M - 108, M - 145, M - 253, M - 394, M - 412, M - 423, M - 442, M - 450, M - 460, M - 461, M - 480, M - 502, M - 520, M - 526, M - 537, M - 548, M - 562, M - 572, M - 579, M - 584, M - 589, M - 599, M - 610, M - 611, M - 308, M - 365 or M - 371 in Example 8 - 35 is as follows:

[0189] Raw material Mn - B, raw material Mn - A, potassium carbonate and tetrakis(triphenylphosphine)palladium are added to toluene, ethanol and water. Under the protection of nitrogen, the temperature is raised for reaction. After the reaction is completed, it is purified to obtain the final product; the dosage of substances and experimental parameters are the same as those in Example 1.

[0190] The structures and yields of the raw material Mn - B, raw material Mn - A and the products are shown in Table 1 below. The elemental analysis results of the prepared compounds are shown in Table 2; the dosage of substances and experimental parameters are the same as those in Example 1.

[0191] Table 1

[0192]

[0193]

[0194]

[0195]

[0196]

[0197] The product characterization data are shown in Table 2:

[0198] Table 2

[0199]

[0200]

[0201] Device Example

[0202] This embodiment provides an organic electroluminescent device, such as Figure 1 shown, which includes an anode 2, a hole injection layer 3, a hole transport layer 4, a light-emitting layer 5, an electron transport layer 6, an electron injection layer 7, and a cathode 8 that are sequentially stacked on a substrate 1. The device structure is: anode (indium tin oxide (ITO) coated glass substrate) / hole injection layer (HIL) / hole transport layer (HTL) / light-emitting layer (EML) / electron transport layer (ETL) / electron injection layer (EIL) / cathode (Al).

[0203] The materials for manufacturing the organic electroluminescent device are as follows:

[0204]

[0205] The preparation of the above organic electroluminescent device includes the following steps:

[0206] 1) Substrate cleaning:

[0207] The glass substrate coated with transparent ITO is ultrasonically treated in an aqueous cleaning agent (the composition and concentration of the aqueous cleaning agent: ethylene glycol solvent ≤ 10 wt%, triethanolamine ≤ 1 wt%), then rinsed in deionized water, ultrasonically degreased in a mixed solvent of acetone and ethanol (the volume ratio of acetone to ethanol is 1:1), baked in a clean environment until all moisture is removed, and then cleaned with ultraviolet light and ozone.

[0208] 2) Organic layer preparation:

[0209] The ITO transparent substrate is transferred to an evaporation equipment and evacuated to 1×10 -6 to 2×10 -4 Pa, and a hole injection layer (HIL) / hole transport layer (HTL) / light-emitting layer (EML) / electron transport layer (ETL) / 1 nm electron injection layer (EIL) / thick cathode (Al) are sequentially evaporated on the anode film.

[0210] Among them:

[0211] The material of the hole injection layer (HIL) is a mixture of NDP-9 and HT, and the specific mass ratio is shown in Table 3;

[0212] The material of the hole transport layer (HTL) is shown in Table 3;

[0213] The light-emitting layer (EML) is vacuum-evaporated by co-evaporation. The material of the light-emitting layer includes a host material and a guest material, and the guest material is (piq) 2 Ir(acac), and the specific material of the host material and its ratio to the guest material are shown in Table 3;

[0214] The materials of the electron transport layer (ETL) are shown in Table 3;

[0215] The material of the electron injection layer (EIL) is LiQ;

[0216] The cathode is aluminum;

[0217] Some layers of the organic light-emitting device, their materials and thicknesses are shown in Table 3

[0218] Table 3

[0219]

[0220]

[0221]

[0222]

[0223] The examples in the table represent device examples, and the comparative examples in the table are device comparative examples.

[0224] Test examples

[0225] The organic light-emitting devices obtained from Device Examples 1-9 and Comparative Examples 1-11 in the device examples were tested.

[0226] Instrument: The characteristics of the device such as current, voltage, brightness, and emission spectrum were synchronously tested using a PR 650 spectral scanning luminance meter and a Keithley K 2400 digital source meter system;

[0227] Test conditions: Photovoltaic characteristics test conditions: The current density was 10 mA / cm2.

[0228] Lifetime test: The current density was 50 mA / cm2, and the time (in hours) was recorded when the device brightness dropped to 95% of the original brightness.

[0229] The test results of the device performance are shown in Table 4:

[0230] Table 4

[0231]

[0232]

[0233] The examples in the table represent device examples, and the comparative examples in the table are device comparative examples.

[0234] From the comparison of the data corresponding to the examples and comparative examples in Table 4, it can be seen that the organic material composition developed in the present invention has significantly more excellent performance than the A, B combinations, etc. disclosed in the prior art, and can have a lower driving voltage after being fabricated into a device.

[0235] Obviously, the above embodiments are merely examples for clear illustration and not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation manners here. And the obvious changes or modifications derived therefrom still fall within the protection scope of the present invention.

Claims

1. An organic material composition, characterized in that, the organic material composition comprises a first compound and a second compound, and the first compound has a structure shown in formula (1): wherein, X is selected from O, S; L', L 1’ , L 2’ Each is independently selected from a connecting bond, a substituted or unsubstituted C6-C30 arylene group, and a substituted or unsubstituted C3-C30 heteroarylene group; Ar 1’ 、Ar 2’ 、Ar is independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C6-C60 aryl, substituted or unsubstituted C6-C60 arylamino, substituted or unsubstituted C3-C60 heteroarylamino, substituted or unsubstituted C3-C60 heteroaryl; the second compound has a structure shown in formula (2): Among them, X 1 -X 14 are each independently selected from N or CR, and R is selected from hydrogen, deuterium, and aryl groups having 6 to 30 carbon atoms; L is independently selected from a linking bond, a substituted or unsubstituted C6-C30 arylene group, a substituted or unsubstituted C3-C30 heteroarylene group; Ar 3 、Ar 4 each independently selected from substituted or unsubstituted C6-C30 aryl, substituted or unsubstituted C3-C30 heteroaryl; the substituents of the substituted C6-C30 arylene group, the substituted C3-C30 heteroarylene group, the substituted C6-C60 aryl group, the substituted C6-C60 arylamine group, the substituted C3-C60 heteroarylamine group, the substituted C3-C60 heteroaryl group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl group, C3-C30 cycloalkyl group, C6-C30 aryl group, C3-C30 heteroaryl group, C6-C60 arylamine group, C3-C60 heteroarylamine group.

2. The organic material composition according to claim 1, characterized in that, In the formula (1), Ar 1’ , Ar 2’ , and Ar are each independently selected from hydrogen, deuterium, halogen, cyano, substituted or unsubstituted C6-C15 aryl, substituted or unsubstituted C6-C18 arylamino, substituted or unsubstituted C3-C18 heteroarylamino, and substituted or unsubstituted C3-C18 heteroaryl; wherein, the substituents of the substituted C6-C15 aryl group, the substituted C6-C18 arylamine group, the substituted C3-C18 heteroarylamine group, the substituted C3-C18 heteroaryl group are each independently selected from one or a combination of at least two of C1-C6 alkyl group, C3-C12 cycloalkyl group, C6-C25 aryl group, C3-C25 heteroaryl group, C6-C60 arylamine group, C3-C60 heteroarylamine group; Preferably, the Ar 1’ , Ar 2’ , and Ar are each independently selected from hydrogen, deuterium, halogen, a substituted or unsubstituted E group, where the E group is selected from the following groups: phenyl, naphthyl, biphenyl, phenanthryl, fluoranthenyl, yl, terphenyl, triphenylene, phenylnaphthyl, naphthylphenyl, dimethylfluorenyl, phenylmethylfluorenyl, diphenylfluorenyl, pyridyl, pyridylphenyl, phenylpyridyl, spirobifluorenyl, benzodimethylfluorenyl, benzodiphenylfluorenyl, benzospirobifluorenyl, dibenzofuranyl, benzonaphthofuranyl, benzonaphthothiophenyl, dibenzothiophenyl, diphenylamino; wherein, the substituents of the substituted E group are each independently selected from one or a combination of at least two of C1-C6 alkyl group, C3-C12 cycloalkyl group, C6-C25 aryl group, C3-C25 heteroaryl group, C6-C60 arylamine group, C3-C60 heteroarylamine group; Preferably, Ar 1’ -Ar 2’ each independently selected from phenyl, naphthyl, biphenyl, anthryl, terphenyl, phenylnaphthyl, naphthylphenyl, dimethylfluorenyl, diphenylfluorenyl, pyridyl, pyridylphenyl, phenylpyridyl, phenylcarbazolyl, phenylbenzo[c]carbazolyl, phenylphenanthro[c]carbazolyl, spirobifluorenyl, spiro[fluorene-9,9'-xanthene]yl, phenylmethylfluorenyl, dibenzofuranyl, benzonaphthofuranyl, diphenylamino; preferably, Ar is selected from phenyl or naphthyl; The said Ar 1’ and Ar 2’ are independently selected from phenyl, naphthyl, dibenzofuranyl, benzonaphthofuranyl, diphenylamino; Preferably, L’, L 1’ , L 2’ are each independently selected from a linking bond, a substituted or unsubstituted C6-C12 arylene group, and a substituted or unsubstituted C3-C12 heteroarylene group; the substituents of the substituted C6-C12 arylene group, the substituted C3-C12 heteroarylene group are each independently selected from one or a combination of at least two of C1-C6 alkyl group, C3-C12 cycloalkyl group, C6-C25 aryl group, C3-C25 heteroaryl group, C6-C60 arylamine group, C3-C60 heteroarylamine group; preferably, L’ is selected from naphthylene; Preferably, L 1’ , L 2’ are each independently selected from a linking group, a phenylene group, and a naphthylene group; preferably, X is selected from O.

3. The organic material composition according to claim 1 or 2, characterized in that, the first compound has a structure shown in any one of N-1 to N-654 as follows:

4. The organic material composition according to any one of claims 1-3, characterized in that, In the formula (2), X 1 -X 14 are all selected from CR, where R is defined as in claim 1; Preferably, any one of X 1 -X 6 is selected from N, and the rest are CR, where R is defined as in claim 1; Preferably, X 1 -X 6 Any one of them is selected from N, and the rest are CR; X 7 -X 14 Any one of them is selected from N, and the rest are CR, and R is defined as in claim 1; preferably, R is selected from hydrogen, deuterium, phenyl, naphthyl; Ar 3 、Ar 4 each independently selected from substituted or unsubstituted C6-C15 aryl, substituted or unsubstituted C3-C20 heteroaryl; the substituents of the substituted C6-C15 aryl group, the substituted C3-C20 heteroaryl group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl group, C3-C30 cycloalkyl group, C6-C30 aryl group, C3-C30 heteroaryl group, C6-C60 arylamine group, C3-C60 heteroarylamine group. Preferably, Ar 3 and Ar 4 are each independently selected from substituted or unsubstituted A groups; The A group includes: phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, fluoranthenyl, triphenylene, fluorenyl, dimethylfluorenyl, diphenylfluorenyl, spirobifluorenyl, benzo(dimethyl)fluorenyl, benzo(diphenyl)fluorenyl, benzo(spirobifluorenyl), benzofuranyl, dibenzofuranyl, naphtho(benzofuranyl), dinaphthofuranyl, benzothiophenyl, dibenzothiophenyl, naphtho(benzothiophenyl), carbazolyl, phenylcarbazolyl, benzo(phenylcarbazolyl), dibenzo(phenylcarbazolyl), biphenylcarbazolyl, phenanthro(benzofuranyl), dibenzofurofuranyl, phenylcarbazolo(benzofuranyl); Among them, the substituents of the substituted A group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl, C3-C30 cycloalkyl, C6-C30 aryl, C3-C30 heteroaryl, C6-C60 arylamine group, and C3-C60 heteroarylamine group; Preferably, Ar 3 and Ar 4 are each independently selected from phenyl, naphthyl, biphenyl, terphenyl, phenanthryl, fluoranthenyl, triphenylene, fluorenyl, dimethylfluorenyl, diphenylfluorenyl, spirobifluorenyl, benzo[1,2-b:4,5-b']difluorenyl, benzo[1,2-b:4,5-b']diphenylfluorenyl, benzo[1,2-b:4,5-b']spirobifluorenyl, dibenzofuranyl, naphtho[2,3-b]dibenzofuranyl, dibenzothiophenyl, naphtho[2,3-b]dibenzothiophenyl, carbazolyl, phenylcarbazolyl, benzocarbazolyl, dibenzocarbazolyl, a phenyl group substituted with one deuterium atom, a phenyl group substituted with two deuterium atoms, a naphthyl group substituted with one deuterium atom, a naphthyl group substituted with two deuterium atoms; Preferably, each L is independently selected from a linking bond, a substituted or unsubstituted C6-C18 arylene group; The substituents in the substituted C6-C18 arylene group are selected from one or a combination of two of deuterium, halogen, cyano, C1-C6 alkyl, C3-C30 cycloalkyl, C6-C30 aryl, C3-C30 heteroaryl, C6-C60 arylamine group, and C3-C60 heteroarylamine group; Preferably, L is selected from a linking bond, phenylene; 5. The organic material composition according to any one of claims 1-4, characterized in that, the second compound has a structure shown in any one of formulas 2-1 to 2-28 below: Preferably, X 1 -X 14 , Ar 3 , Ar 4 are defined as in claim 1 or 2; Preferably, the second compound has a structure shown in formula 2-4 or formula 2-5; Preferably, the second compound has any one of the structures of formula 2-6, formula 2-22, formula 2-25, formula 2-26, formula 2-27, formula 2-28, formula 2-8 to formula 2-20.

6. The organic material composition according to any one of claims 1-5, characterized in that, the second compound has a structure shown in any one of M-1 to M-723 below:

7. The organic material composition according to any one of claims 1-6, characterized in that, in the material composition, the mass ratio of the first compound to the second compound is 1:9 - 9:1; Preferably, in the material composition, the mass ratio of the first compound to the second compound is 2:8 - 8:2; More preferably, in the material composition, the mass ratio of the first compound to the second compound is 3:7 - 7:3; Further preferably, in the material composition, the mass ratio of the first compound to the second compound is 4:6 - 6:

4.

8. An organic electroluminescent host material composition, characterized in that, it contains the organic material composition according to any one of claims 1-7.

9. The application of the organic material composition according to any one of claims 1-7 or the organic electroluminescent host material composition according to claim 8 in an optical device; Preferably, the optical device includes an organic electroluminescent device.

10. An organic electroluminescent device, characterized in that, The organic electroluminescent device includes an anode and a cathode, and an organic layer disposed between the anode and the cathode. The organic layer includes the organic material composition according to any one of claims 1-7 or the organic electroluminescent host material composition according to claim 8. Preferably, the organic layer includes a light-emitting layer, and the light-emitting layer includes the organic material composition according to any one of claims 1-7 or the organic electroluminescent host material composition according to claim 8.

11. An organic electroluminescent device, characterized in that it includes the organic electroluminescent device according to claim 10.

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