An OLED light-emitting organic material and an OLED light-emitting device thereof

Abstract

The present application relates to the technical field of organic light emitting diode, especially to IPC C07, more particularly to an OLED light emitting organic material and an OLED light emitting device thereof.In the present application, the OLED light emitting organic material contains a naphthalene aliphatic ring structure, which improves the electron donating ability of the molecule, thereby improving the electron migration ability, stabilizing the hole, and further improving the stability of the molecule.The compound of the present application applied to an organic electroluminescent device can make the device have higher efficiency, and the molecule has high stability, which can further improve the light emitting efficiency and service life of the device.

Description

Technical Field

[0001] This invention relates to the field of organic light-emitting diode technology, particularly to IPC C07, and more specifically to an OLED light-emitting organic material and an OLED light-emitting device thereof. Background Technology

[0002] Organic light-emitting diodes (OLEDs) have the characteristics of low energy consumption, thinness, wide viewing angle, fast response, and active light emission. They have been widely used in weaponry, electrical appliances, and harsh environments, especially as planar light sources or lighting sources in the display field of electrical appliances.

[0003] With the continuous development of organic light-emitting diodes (OLEDs) and the expansion of their application fields, the requirements for the performance of OLEDs in various aspects are becoming increasingly stringent. Naphthalene, as a commonly used material component in OLED devices, is widely used in hole transport materials, light-emitting layer materials, and electron transport layer materials. Naphthalene has a large conjugated plane, which allows it to form a good conjugation effect when linked with other groups, resulting in excellent molecular stability.

[0004] Existing patent CN201911129807.4 discloses a nitrogen-containing seven-membered ring carbazole organic light-emitting material and its application. The organic light-emitting material's structure is based on a nitrogen-containing seven-membered ring carbazole, and its general structural formula is shown in Formula I: In Formula I, R is benzene, biphenyl, terphenyl, naphthalene, anthracene, phenanthrene, pyrene, binaphthalene, bianthracene, fluoranthracene, benzo[a]anthracene, fluorene, benzo[a]fluorene, N-phenylcarbazole, N-naphthylcarbazole, N-phenylbenzo[a]carbazole, dibenzofuran, or dibenzothiophene. When this nitrogen-containing seven-membered ring carbazole organic light-emitting material is applied to OLED device fabrication as a main light-emitting material or electron transport material, the external quantum efficiency, power efficiency, and current efficiency of the OLED device are significantly improved, thus significantly extending the lifespan of the OLED device and showing good market prospects. However, the planarity of naphthalene results in strong intermolecular π-π interactions, leading to high sublimation temperatures and easy crystallization. Its evaporation temperature and thin film stability still need improvement. Summary of the Invention

[0005] To address the problems in the prior art, the first aspect of the present invention provides an OLED light-emitting organic material, comprising the structure shown in Formula 1.

[0006]

[0007] In Formula 1, R1 to R6 represent hydrogen atoms, substituted or unsubstituted C1 to C30 alkyl groups, substituted or unsubstituted C3 to C30 cycloalkyl groups, heterocycloalkyl groups, substituted or unsubstituted C6 to C30 aryl groups, and substituted or unsubstituted C3 to C30 heteroaryl groups; Y is independently selected from hydrogen atoms, metal atoms, amino groups, hydroxyl groups, mercapto groups, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, C2 to C30 heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; the hydrogen atoms, metal atoms, amino groups, hydroxyl groups, mercapto groups, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, C2 to C30 heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups are all selected from the following groups: The cycloalkyl group (C1-C30), heterocycloalkyl group (C2-C30), aryl group (C6-C30), and heteroaryl group (C3-C30) can be substituted by 0 or any number of substituents selected from substituent group A; the substituents in substituent group A are selected from hydrogen atom, metal atom, amino group, hydroxyl group, mercapto group, C1-C30 alkyl group, C3-C30 cycloalkyl group, C2-C30 heterocycloalkyl group, C6-C30 aryl group, and C3-C30 heteroaryl group; the substituents in substituent group A can also be substituted by 0 or any number of substituents selected from substituent group B; the substituents in substituent group B are selected from hydrogen atom, metal atom, amino group, metal atom, hydroxyl group, mercapto group, and hydroxyl group. The substituents in substituent group B are selected from hydrogen atoms, metal atoms, amino groups, hydroxyl groups, mercapto groups, C1-C30 alkyl groups, C3-C30 cycloalkyl groups, C2-C30 heterocycloalkyl groups, C6-C30 aryl groups, and C3-C30 heteroaryl groups. The substituents in substituent group C may also be replaced by 0 or any number of substituents selected from substituent group D. Substituents are substituted; the substituents in substituent group D are selected from hydrogen atoms, metal atoms, amino groups, hydroxyl groups, mercapto groups, C1-C30 alkyl groups, C3-C30 cycloalkyl groups, C2-C30 heterocyclic alkyl groups, C6-C30 aryl groups, and C3-C30 heteroaryl groups; m is 1-4; Y and any one or more of the substituents in substituent groups A, B, C, and D can be linked by any bond to form an aliphatic ring, heterocyclic ring, aromatic ring, or heteroaromatic ring; all hydrogen atoms in Formula 1 can be replaced by deuterium atoms or C1-C12 alkyl groups, C3-C12 cycloalkyl groups, C2-C12 heterocyclic alkyl groups, and C6-C12 aryl groups.

[0008] Preferably, the OLED light-emitting organic material includes a hole transport layer material, a light-emitting layer material, and an electron transport layer material.

[0009] Preferably, the luminescent layer material includes a fluorescent luminescent layer material or a phosphorescent luminescent layer material; the fluorescent luminescent layer material includes a blue fluorescent luminescent host material; the phosphorescent luminescent layer material includes a phosphorescent host material and a phosphorescent guest material; the phosphorescent host material is a red phosphorescent host material; and the phosphorescent guest material is a red phosphorescent guest material.

[0010] Preferably, the hole transport layer material has a structure shown in any one of Formula 2, Formula 3, or Formula 4.

[0011] Preferably, the structure of Formula 2 is as follows:

[0012]

[0013] In Formula 2, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra is selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; m is 0 to 3; L1, L2, and L3 are selected from single bonds, substituted or unsubstituted C6 to C30 arylene groups, or substituted or unsubstituted C3 to C30 heteroarylene groups; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted groups. The formula consists of C6-C30 aryl groups or substituted or unsubstituted C3-C30 heteroaryl groups; all hydrogen atoms in Formula 2 may be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, and tert-butylphenyl.

[0014] More preferably, the structure of the hole transport layer material is as follows:

[0015]

[0016] In Formula 2-1, R1 to R7 are each independently selected from hydrogen atoms and methyl groups; L1, L2, and L3 are selected from single bonds, substituted or unsubstituted C6-C20 arylene groups, or substituted or unsubstituted C3-C20 heteroarylene groups; preferably, the C6-C20 arylene groups and C3-C20 heteroarylene groups in L1, L2, and L3 are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl groups or substituted or unsubstituted C3-C30 heteroarylene groups; preferably, the C6-C30 aryl groups or C3-C30 heteroarylene groups in Ar1 and Ar2 are phenyl, diphenylene, naphthyl, phenanthrene, triphenylene, or phenylene. Fluorenyl, fluorenyl, spirofluorenyl, spirofluorenoxanthyl, carbazolyl, dibenzothiophene, dibenzofuranyl, benzofluorenyl, benzocarbazolyl, benzonaphthothiophene, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formulas are the same or different, and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl The following compounds are used in Formula 2-1: methyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 2-1 may be replaced by deuterium atoms or C1-C6 alkyl groups.

[0017] Preferably, the structure of Formula 3 is as follows:

[0018]

[0019] In Formula 3, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; X is selected from CR7R8, NR9, O, and S; R7-R9 are selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, and C2 to C30 heterocycloalkyl groups; R7-R8 can be connected by any bond to form an aliphatic ring; m is 0 to 2; p is 0 to 3; L is selected from single bonds, substituted or unsubstituted C6 to C30 alkyl groups. The arylene group is a substituted or unsubstituted C3-C30 heteroarylene group; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroaryl groups; all hydrogen atoms in Formula 3 may be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, or heterocycloalkyl groups; the substituents in the formula may be the same or different and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, and tert-butylphenyl.

[0020] More preferably, the structure of the hole transport layer material is as follows:

[0021]

[0022] In Formula 3-1, R1 to R6 are each independently selected from hydrogen atoms and methyl groups, and n is 1 or 2; X is selected from CR7R8, NR9, O, and S; R7 to R9 are selected from hydrogen atoms, C1 to C6 alkyl groups, C3 to C6 cycloalkyl groups, and C2 to C6 heterocyclic alkyl groups; R7 to R8 can be connected by any bond to form an aliphatic ring; L is selected from single bonds, substituted or unsubstituted C6 to C20 arylene groups, or substituted or unsubstituted C3 to C20 heterocyclic arylene groups. Aryl; preferably, the C6-C20 arylene and C3-C20 heteroarylene in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroarylene; preferably, the C6-C30 aryl or C3-C2 in Ar1 and Ar2 are... The aryl group or C3-C30 heteroaryl group of 0 is phenyl, diphenyl, naphthyl, phenanthrene, triphenylene, fluorenyl, spirofluorenyl, spirofluorenoxanthyl, carbazole, dibenzothiophene, dibenzofuranyl, benzofluorenyl, benzocarbazole, benzonaphthothiophene, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formula are the same or different and are independently selected from... Hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 3-1 can be replaced by deuterium atoms or C1-C6 alkyl groups.

[0023] Preferably, the structure of Formula 4 is as follows:

[0024]

[0025] In Formula 4: R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra represents hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; X is selected from none, CR 19 R 20 NR 21 O, S, R 19 -R 21 Selected from hydrogen atoms, C1-C30 alkyl groups, C3-C30 cycloalkyl groups, C2-C30 heterocycloalkyl groups, R 19 -R 20 They can be connected by any bond to form a fatty ring; m is selected from 0 to 2; R7 to R 18Selected from hydrogen atoms, substituted or unsubstituted C1-C30 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl or heterocycloalkyl groups, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C3-C30 heteroaryl groups, R7~R 18 At least one of them is L is selected from single-bonded, substituted or unsubstituted C6-C30 arylene or substituted or unsubstituted C3-C30 heteroarylene; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroaryl. All hydrogen atoms in Formula 4 may be substituted with deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, and tert-butylphenyl.

[0026] More preferably, the structure of the hole transport layer material is as follows:

[0027]

[0028] In Formula 4-1: R1 to R6 are each independently selected from hydrogen atoms and methyl groups, and n is 1 or 2; X is selected from none or X is selected from CR. 19 R 20 NR 21 O, S, R 19 -R 21 Selected from hydrogen atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, and C2-C6 heterocycloalkyl groups, R 19 -R 20 They can be connected by any bond to form a fatty ring; R7~R 18 Selected from hydrogen atoms, substituted or unsubstituted C1-C6 alkyl groups, substituted or unsubstituted C3-C6 cycloalkyl or heterocycloalkyl groups, substituted or unsubstituted C6-C12 aryl groups, substituted or unsubstituted C3-C12 heteroaryl groups, R7~R 18 At least one of them is L is selected from single-bonded, substituted or unsubstituted C6-C20 arylene groups or substituted or unsubstituted C3-C20 heteroarylene groups; preferably, the C6-C20 arylene groups and C3-C20 heteroarylene groups in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl groups or substituted or unsubstituted C3-C30 heteroarylene groups; preferably, the C6-C30 aryl groups or C3-C30 heteroarylene groups in Ar1 and Ar2 are phenyl, diphenylene, naphthyl, phenanthrene, triphenylene, fluorene, spirofluorene, spirofluoreneoxanthyl, or carbazolyl. The formula contains dibenzothiophene, dibenzofuran, benzofluorenyl, benzocarbazolyl, benzonaphthothiophene, benzonaphthofuran, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, and quinoxalinyl; wherein the substituents in the formula are the same or different and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, and quinoxalinyl; all hydrogen atoms in formula 4-1 can be replaced by deuterium atoms or C1-C6 alkyl groups.

[0029] Preferably, the structure of the hole transport material is as shown in HT1 to HT36:

[0030]

[0031]

[0032] Preferably, the electron transport layer material has a structure shown in any one of Formulas 5, 6, and 7.

[0033] Preferably, the structure of Formula 5 is as follows:

[0034]

[0035] In Formula 5, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra represents hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; m is selected from 0 to 2; L is selected from single bonds, substituted or unsubstituted C6 to C30 arylene groups, or substituted or unsubstituted C3 to C30 heteroarylene groups. In Formula 5, all hydrogen atoms can be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, or heterocycloalkyl groups; the substituents in the formula may be the same or different and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, and tert-butylphenyl.

[0036] Further preferably, the structure of the electron transport layer material is as follows:

[0037]

[0038] In Formula 5-1, R1 to R7 are each independently selected from hydrogen atoms and methyl groups; Ra is selected from hydrogen atoms and phenyl groups; m is 1, 2, or 3; L is selected from single bonds, substituted or unsubstituted C6 to C20 arylene groups, or substituted or unsubstituted C3 to C20 heteroarylene groups; preferably, the C6 to C20 arylene groups and C3 to C20 heteroarylene groups in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; X1, X2, and X3 are each independently C or N, and at least one of them is N; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6 to C30 aryl groups or substituted or unsubstituted C3 to C30 heteroarylene groups; the C6 to C30 aryl groups or C3 to C30 heteroarylene groups in Ar1 and Ar2 are phenyl, diphenylene, or methylene. Phenyl, naphthyl, phenanthryl, triphenylene, fluorenyl, fluorenyl, spirofluorenyl, spirofluorenoxanthyl, carbazole, dibenzothiophene, dibenzofuranyl, benzofluorenyl, benzocarbazole, benzonaphthothiophene, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formulas are the same or different, and are independently selected from hydrogen, fluorine, chlorine, bromine, and cyano. Nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 5-1 can be replaced by deuterium atoms or C1-C6 alkyl groups.

[0039] Preferably, the structure of Formula 6 is as follows:

[0040]

[0041] In Formula 6, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; X is selected from CR7R8, NR9, O, and S; R7 to R9 are selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, and C2 to C30 heterocycloalkyl groups; R7 to R8 can be connected by any bond to form an aliphatic ring; m is 0 to 2; p is 0. ~3; L is selected from single bonds, substituted or unsubstituted C6-C30 arylene groups or substituted or unsubstituted C3-C30 heteroarylene groups; all hydrogen atoms in Formula 6 may be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, tert-butylphenyl.

[0042] Further preferably, the structure of the electron transport layer material is as follows:

[0043]

[0044] In Formula 6-1, R1 to R7 are each independently selected from hydrogen atoms and methyl groups; Ra is selected from hydrogen atoms and phenyl groups; m is selected from 0 to 2; preferably, it is 0, 1, or 2; X is selected from CR7R8, NR9, O, or S; R7 to R9 are selected from hydrogen atoms, C1 to C6 alkyl groups, C3 to C6 cycloalkyl groups, or C2 to C6 heterocycloalkyl groups; R7 to R8 can be connected by any bond to form an aliphatic ring; L is selected from single bonds, substituted or unsubstituted C6 to C20 aryl groups, or substituted or unsubstituted aryl groups. The substituted C3-C20 heteroarylene groups; preferably, the C6-C20 and C3-C20 heteroarylene groups in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; X1, X2, and X3 are each independently C or N, and at least one of them is N; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl groups or substituted or unsubstituted C3-C... 30 heteroaryl groups; the C6-C30 aryl or C3-C30 heteroaryl groups in Ar1 and Ar2 are phenyl, diphenyl, naphthyl, phenanthrene, triphenylene, fluorenyl, spirofluorenyl, spirofluorenoxanthyl, carbazole, dibenzothiophene, dibenzofuranyl, benzofluorenyl, benzocarbazole, benzonaphthothiophene, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein, the substituents in the formula... The same or different, independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 6-1 may be replaced by deuterium atoms or C1-C6 alkyl groups.

[0045] Preferably, the structure of Formula 7 is as follows:

[0046]

[0047] In Formula 7, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra represents hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; X is selected from none, CR 19 R 20 NR 21 O, S, R 19 -R 21 Selected from hydrogen atoms, C1-C30 alkyl groups, C3-C30 cycloalkyl groups, C2-C30 heterocycloalkyl groups, R 19 -R 20They can be connected by any bond to form a fatty ring; m is selected from 0 to 2; R7 to R 18 Selected from hydrogen atoms, substituted or unsubstituted C1-C30 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl or heterocycloalkyl groups, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C3-C30 heteroaryl groups, R7~R 18 At least one of them is L is selected from single bonds, substituted or unsubstituted C6-C30 arylene or C3-C30 heteroarylene; all hydrogen atoms in Formula 7 may be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, tert-butylphenyl.

[0048] Preferably, Electron in Equations 5, 6, and 7 Each acceptor is independently selected from naphthyl, anthracene, phenanthryl, pyrenyl, peryl, fluorenyl, fluoranyl, pyridyl, pyrroleyl, pyrimidinyl, pyridazinyl, imidazolyl, pyrazolyl, azole, isozolyl, thiazolyl, isothiazolyl, triazolyl, diazolyl, thiadiazolyl, dithiazolyl, tetrazolyl, pyranyl, thiaranyl, pyrazinyl, azinyl, thiazolyl, dioxazinyl, dioxazinyl, triazinyl, tetraazinyl, quinolinyl, isoquinolinyl, quinolinyl, quinazolinyl, quinoxolinyl, naphthidyl, acridineyl, xanthyl, phenanthridineyl, diazanaphthyl, triazaindenyl, indoleyl, dihydroindoleyl, nitro-indenyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, pyrazinopyrazinyl, benzothiazolyl, benzoxoxane Azolyl, benzimidazolyl, benzothiophene, benzofuranyl, dibenzothiophene, dibenzofuranyl, carbazoyl, benzocarbazoyl, dibenzocarbazoyl, indolocarbazoyl, indocarbazoyl, phenazinyl, imidazopyridyl, phenazinyl, phenanthridine, phenanthridine, phenanthridine, phenthiazinyl, imidazopyridyl, imidazophenanthridine, benzimidazolylquinazolinyl, benzimidazolylphenanthridine, spiro[fluorene-9,9'-oxazanthene], phenylbinaphthyl, dinaphthofuranyl, naphthobenzofuranyl, dinaphthiophene, naphthobenzothiophene, triphenylphosphine oxide, triphenylborane, 1-10 o-phenanthrolinel, cyano-substituted aryl or heteroaryl, fluorine-substituted aryl or heteroaryl, trifluoromethyl-substituted aryl or heteroaryl.

[0049] More preferably, the structure of the electron transport layer material is as follows:

[0050]

[0051] Formula 7-1, R1 to R6 are each independently selected from hydrogen atoms or methyl groups, and n is 1 or 2; Ra is selected from hydrogen atoms or phenyl groups; X is selected from none, CR 19 R 20 NR 21 O, S, R 19 -R 20 Selected from hydrogen atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, and C2-C6 heterocycloalkyl groups, R 19 -R 20 They can be connected by any bond to form a fatty ring; R7~R 18 Selected from hydrogen atoms, substituted or unsubstituted C1-C6 alkyl groups, substituted or unsubstituted C3-C6 cycloalkyl or heterocycloalkyl groups, substituted or unsubstituted C6-C12 aryl groups, substituted or unsubstituted C3-C12 heteroaryl groups, R7~R 18 At least one of them is L is selected from single-bonded, substituted or unsubstituted C6-C20 arylene or substituted or unsubstituted C3-C20 heteroarylene; preferably, the C6-C20 arylene and C3-C20 heteroarylene in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; X1, X2, and X3 are each independently C or N, and at least one of them is N; Ar1 ​​and Ar2 are each independently selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroarylene; the C6-C30 aryl or C3-C30 heteroarylene in Ar1 and Ar2 are phenyl, diphenylene, naphthyl, phenanthrene, triphenylene, fluorene, fluorene, or spirofluorene. The formula contains the following substituents: spirofluorenoxanthyl, carbazolyl, dibenzothiophene, dibenzofuran, benzo[fluorene], benzo[carbazolyl], benzo[naphthothiophene], benzo[naphthofuran], pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, and quinoxalinyl; wherein the substituents in the formula are the same or different and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, and quinoxalinyl; all hydrogen atoms in formula 7-1 may be replaced by deuterium atoms or C1-C6 alkyl groups.

[0052] Preferably, the specific structure of the electron transport layer material is shown in E1 to E24.

[0053]

[0054] Preferably, the red phosphorescent luminescent host material has a structure shown in any one of Formula 8 or Formula 9.

[0055] Preferably, the structure of Formula 8 is as follows:

[0056]

[0057] In Formula 8, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; Rb can be connected by any bond to form an aliphatic ring, heterocyclic ring, aromatic ring, or heteroaromatic ring; m is 0 to 2; p is 0 to 3; Ar1 ​​and Ar2 are each independently selected from hydrogen atoms, substituted or unsubstituted C6 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, substituted or unsubstituted C6 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, substituted or unsubstituted C6 to C30 ...3 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, substituted or unsubstituted C3 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently The C30 aryl group or substituted or unsubstituted C3-C30 heteroaryl group; all hydrogen atoms in Formula 8 may be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, tert-butylphenyl.

[0058] More preferably, the structure of the red phosphorescent luminescent host material is as follows:

[0059]

[0060] In Formula 8-1, R1 to R6 are each independently selected from hydrogen atoms and methyl groups, and n is 1 or 2; Rb are each independently selected from hydrogen atoms, C1 to C6 alkyl groups, C3 to C6 cycloalkyl or heterocycloalkyl groups, C6 to C20 aryl groups, and C3 to C20 heteroaryl groups; Rb can be connected by any bond to form an aliphatic ring, heterocyclic ring, aromatic ring, or heteroaromatic ring; p is 0 to 3, preferably 0, 1, 2, or 3; Ar1 ​​and Ar2 are each independently selected from hydrogen atoms, substituted or unsubstituted C6 to C30 aryl groups, or substituted or unsubstituted C3 to C30 heteroaryl groups; the C6 to C30 aryl groups or C3 to C30 heteroaryl groups in Ar1 and Ar2 are phenyl, diphenyl, naphthyl, phenanthrene, triphenylene, fluorenyl, spirofluorenyl, spirofluorenyl, etc. Fluorenoxanthyl, carbazolyl, dibenzothiophene, dibenzofuranyl, benzofluorenyl, benzocarbazolyl, benzonaphthothiophene, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formula are the same or different, and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridinyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 8-1 may be replaced by deuterium atoms or C1-C6 alkyl groups.

[0061] Preferably, the structure of Formula 9 is as follows:

[0062]

[0063] In Formula 9, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra and Rb are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; m is 0 to 2; p is 0 to 3; X1 and X2 are each independently selected from CR7R8, NR9, O, and S; R7 to R9 are selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, and C2 to C30 heterocycloalkyl groups; R7 to R8 can be connected by any bond to form an aliphatic ring; R7 and R8 are each independently selected from substituted or unsubstituted C6 to C30 aryl groups or substituted or unsubstituted C3 to C30 heteroaryl groups; Rc and Rb are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, and C2 to C30 heterocycloalkyl groups; m is 0 to 2; p is 0 to 3; X1 and X2 are each independently selected from CR7R8, NR9, O, and S; R7 to R9 are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, and C2 to C30 heteroaryl groups; R7 to R8 can be connected by any bond to form an aliphatic ring; R7 and R8 are each independently selected from substituted or unsubstituted C6 to C30 aryl groups or substituted or unsubstituted C3 to C30 heteroaryl groups; Rc and Rb are each independently selected from hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl groups, and C3 to C30 heteroaryl groups. Each of the following is independently selected from hydrogen atoms, substituted or unsubstituted C1-C30 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl or heterocycloalkyl groups, substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C3-C30 heteroaryl groups; Rc can be fused together by any bond to form a ring; q is selected from 0 to 3; all hydrogen atoms in Formula 9 can be substituted by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, and tert-butylphenyl.

[0064] More preferably, the structure of the red phosphorescent luminescent host material is as follows:

[0065]

[0066] In Formula 9-1, R1 to R6 are each independently selected from hydrogen atoms or methyl groups, and n is 1 or 2; Ra is selected from hydrogen atoms or phenyl groups; m is 1, 2 or 3; X1 and X2 are each independently selected from CR9R 10 NR 11 O, S, R9-R 11 Selected from hydrogen atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, C2-C6 heterocycloalkyl groups, R9-R 10The atoms can be linked by any bond to form an aliphatic ring; R7 and R8 are each independently selected from C6-C30 aryl or C3-C30 heteroaryl groups that are unsubstituted, hydrogen-atom-free, substituted, or unsubstituted; the C6-C30 aryl or C3-C30 heteroaryl groups in R7 and R8 are phenyl, biphenyl, naphthyl, phenanthrene, triphenylene, fluorenyl, spirofluorenyl, spirofluoroxanthyl, carbazole, dibenzothiophene, or dibenzofuran. The following groups are used: benzo[a]fluorenyl, benzo[a]carbazolyl, benzo[a]naphthothiophene, benzo[a]naphthofuran, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; m is selected from 0 to 2; Rc represents a hydrogen atom or a C1-C10 alkyl, C3-C10 cycloalkyl, or C2-C10 heterocyclic alkyl, C6-C30 aryl, or C3-C30 heteroaryl; Rc groups can be fused together by any bond to form a ring; q is selected from 0 to 3. All hydrogen atoms in Formula 9-1 can be replaced by deuterium atoms, C1-C6 alkyl, C3-C6 cycloalkyl, or heterocyclic alkyl.

[0067] Preferably, the specific structure of the red phosphorescent luminescent host material is as shown in RH1 to RH24.

[0068]

[0069] Preferably, the blue fluorescent luminescent layer material has a structure shown in any one of Formulas 10, 11, and 12.

[0070] Preferably, the structure of Formula 10 is as follows:

[0071]

[0072] In Formula 10, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; R7 to R6 are selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups. 14The atom is a hydrogen atom, a substituted or unsubstituted C1-C30 alkyl group, a substituted or unsubstituted C3-C30 cycloalkyl or heterocycloalkyl group, a substituted or unsubstituted C6-C30 aryl group, or a substituted or unsubstituted C3-C30 heteroaryl group; Ra is selected from hydrogen atom, C1-C30 alkyl group, C3-C30 cycloalkyl or heterocycloalkyl group, C6-C30 aryl group, or C3-C30 heteroaryl group; m is 0-3, and L is selected from single bond, a substituted or unsubstituted C6-C30 arylene group, or a substituted or unsubstituted C3-C30 heteroarylene group; A r is selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroaryl; all hydrogen atoms in Formula 10 may be replaced by deuterium atoms, C1-C6 alkyl, C3-C6 cycloalkyl or heterocycloalkyl; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, tert-butylphenyl.

[0073] More preferably, in Formula 10, R1 to R6 are each independently selected from hydrogen atoms and methyl groups; Ra is selected from hydrogen atoms or phenyl groups; m is 1, 2, or 3; R7 to R6 are selected from hydrogen atoms and methyl groups. 14 L is a hydrogen atom; L is selected from single-bonded, substituted or unsubstituted C6-C20 arylene or substituted or unsubstituted C3-C20 heteroarylene; preferably, the C6-C20 arylene and C3-C20 heteroarylene in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; Ar is selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroarylene; preferably, the C6-C30 aryl or C3-C30 heteroarylene in Ar are phenyl, diphenylene, naphthyl, phenanthrene, triphenylene, fluorene, spirofluorene, spirofluoreneoxanthyl, carbazolyl, or dibenzofuranyl. Thiopheneyl, dibenzofuranyl, benzofluorenyl, benzocarbazoyl, benzonaphthothienyl, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formula are the same or different, and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 10 can be replaced by deuterium atoms or C1-C6 alkyl groups.

[0074] Preferably, the structure of Formula 11 is as follows:

[0075]

[0076] In Formula 11, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra represents hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; m is 0 to 2; L is selected from single bonds, substituted or unsubstituted C6 to C30 arylene groups, or C3 to C30 heteroarylene groups; Ar are each independently selected from substituted or unsubstituted C6 to C30 aryl groups. The aryl or C3-C30 heteroaryl group; all hydrogen atoms in Formula 11 may be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, tert-butylphenyl.

[0077] In a further preferred embodiment, in Formula 11, R1 to R6 are each independently selected from hydrogen atoms or methyl groups, and n is 1 or 2; Ra is selected from hydrogen atoms or phenyl groups; m is 1, 2, or 3; X is selected from CR 15 R 16 NR 17 O, S, R 15 -R 17 Selected from hydrogen atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, and C2-C6 heterocycloalkyl groups, R 15 -R 16 They can be connected by any bond to form a fatty ring; R7~R 14The atom is hydrogen; L is selected from single-bonded, substituted or unsubstituted C6-C20 arylene or substituted or unsubstituted C3-C20 heteroarylene; preferably, the C6-C20 arylene and C3-C20 heteroarylene in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; Ar is independently selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroarylene; preferably, the C6-C30 aryl or C3-C30 heteroarylene in Ar is phenyl, diphenylene, naphthyl, phenanthrene, triphenylene, fluorene, fluorene, spirofluorene, spirofluorenexanthyl, carbazolyl, diphenylene ... Benzothiophene, dibenzofuran, benzofluorenyl, benzocarbazoyl, benzonaphthothiophene, benzonaphthofuran, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formula are the same or different, and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 11 can be replaced by deuterium atoms or C1-C6 alkyl groups.

[0078] Preferably, the structure of Formula 12 is as follows:

[0079]

[0080] In Formula 12: R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; R7 to R 14 Each is independently selected from hydrogen atoms, C1-C30 alkyl groups, C3-C30 cycloalkyl or heterocycloalkyl groups, C6-C30 aryl groups, and C3-C30 heteroaryl groups; X is selected from none, CR 15 R 16 NR 17 O, S, R 15 -R 17 Selected from hydrogen atoms, C1-C30 alkyl groups, C3-C30 cycloalkyl groups, C2-C30 heterocycloalkyl groups, R 15 -R 16The atoms can be linked by any bond to form an aliphatic ring; L is selected from single bonds, substituted or unsubstituted C6-C30 aryl groups or substituted or unsubstituted C3-C30 heteroaryl groups; Ar is independently selected from substituted or unsubstituted C6-C30 aryl groups or substituted or unsubstituted C3-C30 heteroaryl groups; all hydrogen atoms in Formula 12 can be replaced by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups or heterocycloalkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, C1-C6 alkyl, C3-C6 cycloalkyl, C2-C6 heterocycloalkyl, C6-C20 aryl, C3-C20 heteroaryl, tolyl, tert-butylphenyl.

[0081] In a further preferred embodiment, in Formula 12: R1 to R6 are each independently selected from hydrogen atoms and methyl groups, and n is 1 or 2; X is selected from none, CR 15 R 16 NR 17 O, S, R 15 -R 17 Selected from hydrogen atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, and C2-C6 heterocycloalkyl groups, R 15 -R 16 They can be connected by any bond to form a fatty ring; R7~R 14 L is a hydrogen atom; L is selected from single-bonded, substituted or unsubstituted C6-C20 arylene or substituted or unsubstituted C3-C20 heteroarylene; preferably, the C6-C20 arylene and C3-C20 heteroarylene in L are phenylene, diphenylene, terphenylene, naphthylene, fluorene, carbazolyl, dibenzothiophene, or dibenzofuranyl; Ar is selected from substituted or unsubstituted C6-C30 aryl or substituted or unsubstituted C3-C30 heteroarylene; preferably, the C6-C30 aryl or C3-C30 heteroarylene in Ar are phenyl, diphenylene, naphthyl, phenanthrene, triphenylene, fluorene, spirofluorene, spirofluoreneoxanthyl, carbazolyl, or dibenzofuranyl. Thiopheneyl, dibenzofuranyl, benzofluorenyl, benzocarbazoyl, benzonaphthothienyl, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; wherein the substituents in the formula are the same or different, and are independently selected from hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 12 can be replaced by deuterium atoms or C1-C6 alkyl groups.

[0082] Preferably, the specific structure of the blue fluorescent luminescent host material is shown in BH1 to BH12.

[0083]

[0084] Preferably, the red phosphorescent luminescent object material has the structure shown in Formula 13.

[0085]

[0086] In Formula 13, R1 to R6 are each independently selected from hydrogen atoms, substituted or unsubstituted C1 to C4 alkyl groups, and n is 1 or 2; Ra represents hydrogen atoms, C1 to C30 alkyl groups, C3 to C30 cycloalkyl or heterocycloalkyl groups, C6 to C30 aryl groups, and C3 to C30 heteroaryl groups; m is selected from 0 to 2; R7 to R6 are also selected from R7 to R6. 10 Each is independently selected from hydrogen atoms, substituted or unsubstituted C1-C30 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl or heterocycloalkyl groups, substituted or unsubstituted C6-C30 aryl groups, or substituted or unsubstituted C3-C30 heteroaryl groups; R7-R 10 It can form arbitrary bonds and rings; R 11 R 12 Each of the following is independently selected from halogen atoms, hydrogen atoms, cyano groups, substituted or unsubstituted C1-C30 haloalkyl groups, substituted or unsubstituted C1-C30 alkyl groups, substituted or unsubstituted C3-C30 cycloalkyl groups, or substituted or unsubstituted C2-C30 heterocyclic alkyl groups; substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C3-C30 heteroaryl groups; all hydrogen atoms in Formula 13 may be substituted by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, or heterocyclic alkyl groups; the substituents in the formula may be the same or different, and are independently selected from hydrogen atoms, halogen atoms, cyano groups, nitro groups, trifluoromethyl groups, methoxy groups, ethoxy groups, methylthio groups, C1-C6 alkyl groups, C3-C6 cycloalkyl groups, C2-C6 heterocyclic alkyl groups, C6-C20 aryl groups, C3-C20 heteroaryl groups, tolyl groups, and tert-butylphenyl groups.

[0087] More preferably, the structure of the red phosphorescent guest material is as follows:

[0088]

[0089] In Equation 13-1, p = 2, q = 1, R1 to R6 are each independently selected from hydrogen atoms and methyl groups, and n is 1 or 2; R7 to R 10Each of the following is independently selected from hydrogen atoms, substituted or unsubstituted C1-C10 alkyl groups, substituted or unsubstituted C3-C10 cycloalkyl groups, substituted or unsubstituted C2-C10 heterocycloalkyl groups, substituted or unsubstituted C6-C20 aryl groups, or substituted or unsubstituted C3-C20 heteroaryl groups; preferably, R7-R 10 The C6-C30 aryl or C3-C30 heteroaryl groups are phenyl, diphenyl, naphthyl, phenanthrene, triphenylene, fluorenyl, spirofluorenyl, spirofluorenoxanthyl, carbazole, dibenzothiophene, dibenzofuranyl, benzofluorenyl, benzocarbazole, benzonaphthothiophene, benzonaphthofuranyl, pyridyl, pyrazinyl, pyrimidinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl; R 11 R 12 Each of the following groups is independently selected from halogen atoms, hydrogen atoms, cyano groups, substituted or unsubstituted C1-C30 haloalkyl groups, substituted or unsubstituted C1-C30 alkyl-substituted or unsubstituted C3-C10 cycloalkyl groups, substituted or unsubstituted C2-C10 heterocycloalkyl groups; substituted or unsubstituted C6-C30 aryl groups, substituted or unsubstituted C3-C30 heteroaryl groups, wherein the substituents in the formula are the same or different, and are independently selected from... Hydrogen, fluorine, chlorine, bromine, cyano, nitro, trifluoromethyl, methoxy, ethoxy, methylthio, ethylthio, methyl, ethyl, n-propyl, isopropyl, n-butyl, isobutyl, tert-butyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, tolyl, tert-butylphenyl, naphthyl, pyridyl, pyrazinyl, pyrimidinyl, triazinyl, quinolinyl, isoquinolinyl, quinoxalinyl; all hydrogen atoms in Formula 13-1 may be replaced by deuterium atoms or C1-C6 alkyl groups.

[0090] Preferably, the specific structure of the red phosphorescent luminescent object material is shown in RD1 to RD6;

[0091]

[0092] Preferably, in Formula 1, when n = 2, R1, R2, R3, and R4 are methyl groups; when n = 1, R1, R2, R3, R4, R5, and R6 are methyl groups.

[0093] In this invention, a naphthalene-aliphatic ring structure is used as the parent core. The introduction of alkyl groups enhances the electron-donating ability of the molecule, thereby improving hole migration and stabilizing electrons, thus improving molecular stability. Simultaneously, the introduction of alkyl groups prevents excessively dense molecular packing, lowering the sublimation temperature of the material and reducing the energy consumption of the vapor deposition process. The inventors have discovered that naphthalene has a large conjugated plane, which can form a good conjugation effect when connected with other groups, thereby improving molecular stability. However, in practical applications, the planarity of naphthalene has resulted in strong π-π interactions between molecules, leading to a higher sublimation temperature and problems such as easy crystallization. The inventors have creatively replaced the naphthalene structure with groups from Formula 1 as the parent core, which reduces intermolecular interactions, making the amorphous film less prone to crystallization and thus improving the performance of many functional layers of the device.

[0094] A second aspect of the present invention provides an OLED light-emitting device containing OLED light-emitting organic material, wherein the OLED light-emitting device includes at least an anode, a cathode, and an organic layer.

[0095] Preferably, the anode is a first electrode; and the cathode is a second electrode.

[0096] Preferably, the organic layer includes an electron transport layer, a hole blocking layer, a light-emitting layer, a second hole transport layer, a first hole transport layer, and a hole injection layer.

[0097] Preferably, at least one of the hole transport layer, the light-emitting layer, and the electron transport layer is made of an OLED light-emitting organic material; the structure of the OLED light-emitting device is shown below. Figure 1 .

[0098] Beneficial effects

[0099] 1. In this invention, a naphthoid aliphatic ring structure is used as the parent core. The introduction of alkyl groups improves the electron-donating ability of the molecule, thereby improving the hole migration ability and stabilizing electrons, thus improving the stability of the molecule.

[0100] 2. The introduction of alkyl groups in this invention forms an aliphatic ring with naphthalene, which prevents the molecules from packing too tightly, reduces the sublimation temperature of the material, reduces the energy consumption of the vapor deposition process, and improves the high-temperature pyrolysis of organic molecules.

[0101] 3. When the compounds of the present invention are applied to organic electroluminescent devices, the devices can have high efficiency, and the molecules have high stability, which can further improve the luminous efficiency and lifespan of the devices.

[0102] 4. The compounds in this invention provide high hole transport capability and electron transport capability, reduce voltage, improve efficiency, and thus extend service life.

[0103] 5. The hole transport layer, light-emitting layer, and electron transport layer in this invention are prepared using materials containing OLED light-emitting organic materials, and are combined in a specific structure to improve the luminous efficiency and lifespan of the device. Attached Figure Description

[0104] Figure 1 This is a structural diagram of an OLED light-emitting device; 1 is the capping layer, 2 is the second electrode, 3 is the electron transport layer, 4 is the hole blocking layer, 5 is the light-emitting layer (which can be phosphorescent or fluorescent), 6 is the second hole transport layer, 7 is the first hole transport layer, 8 is the hole injection layer, 9 is the first electrode, and 10 is the substrate. Detailed Implementation

[0105] The synthesis method for hole transport materials and red phosphorescent host materials employs the Buchwald–Hartwig coupling reaction, as shown in the following equation:

[0106]

[0107]

[0108] The reaction process is as follows: In a three-necked flask, first add 1 molar equivalent of a halogen-containing compound (halogen atoms are fluorine, chlorine, bromine, and iodine), 1 molar equivalent of an amino compound, 0.01 molar equivalent of tris(dibenzylacetone)palladium (Pd2(dba)3), 0.02 molar equivalent of tri-tert-butylphosphine (t-Bu3P), and 2 molar equivalents of sodium tert-butoxide (NaOBu-t). Then add 10 times the weight of the chlorine-containing compound in toluene. The system is purged with nitrogen, and the reaction solution is heated to reflux and stirred for 180 min. The reaction solution is then cooled to 70°C and superheated on a silica gel column. The mother liquor is concentrated to one-third of its volume, and one-sixth the volume of the reaction solution in ethanol is added. The mixture is stirred at room temperature for 1 h and then filtered. The solid is then purified by recrystallization and silica gel chromatography. The purified solid is dried and then purified by vacuum sublimation.

[0109] The electron transport material and the blue fluorescent luminescent host material were obtained using the Suzuki coupling reaction, as shown in the following reaction formula:

[0110]

[0111]

[0112] The reaction process is as follows: In a reaction flask, 1 molar equivalent of a halogen-containing compound (halogen atoms are fluorine, chlorine, bromine, or iodine), 1 molar equivalent of a boric acid compound, 0.1 molar equivalent of tetrakis(triphenylphosphine)palladium (Pd(PPh3)4), and 2 molar equivalents of potassium carbonate (K2CO3) are mixed. Toluene (10 times the weight of the chlorine-containing compound), ethanol (1.5 times the weight of the chlorine-containing compound), and deionized water (1.5 times the weight of the chlorine-containing compound) are added. The system is purged with nitrogen three times. The reaction mixture is heated to reflux and stirred for 3 hours. The reaction mixture is cooled to 50°C and allowed to stand for phase separation. The upper organic phase is washed with 1.5 times the weight of the chlorine-containing compound in deionized water. The organic phase is purified by regular column chromatography and recrystallization to obtain a solid. After drying, it is purified by vacuum sublimation.

[0113] The reaction formula for the red phosphorescent guest material is as follows:

[0114]

[0115] The specific synthesis method is as follows: 4 molar equivalents of RDA and 1 molar equivalent of iridium trichloride hydrate are dissolved in 10 times the weight of RDA in ethylene glycol diethyl ether and 1 times the weight of RDA in water. The reaction solution is heated to reflux under nitrogen protection and stirred for 24 hours. The reaction solution is cooled to room temperature, and 10 times the weight of RDA in water is added dropwise, resulting in the precipitation of a large amount of solid. The solid is filtered, and the filtrate is concentrated and dried to obtain a red solid, which is RDB.

[0116] One molar equivalent of compound RDB and six molar equivalents of diketone were dissolved in 10 times the weight of RDB in ethylene glycol diethyl ether. Six molar equivalents of sodium carbonate were added, and the mixture was purged with nitrogen. The mixture was stirred at 60°C for 24 hours. The reaction solution was purified by silica gel column chromatography and recrystallization to obtain a red solid, RD. The solid compound was dried and then purified by vacuum sublimation.

[0117] All the raw materials in the examples can be prepared conventionally.

[0118] Synthesis Example 1

[0119] The preparation method of HT2 is as follows: In a three-necked flask, first add 1 molar equivalent of 6-bromo-1,2,3,4-tetrahydro-1,1,4,4-tetramethylanthracene, 1 molar equivalent of N-(9,9'-spirofluorene-7-yl)-5a,9a-dihydrodibenzo[b,d]furan-3-amine, 0.01 molar equivalent of tris(dibenzylideneacetone)dipalladium (Pd2(dba)3), and 0.02 molar equivalent of tritert-tert-butylphosphine (t-Bu 3P), 2 molar equivalents of sodium tert-butoxide (NaOBu-t), and 10 times the weight of the bromine-containing compound in toluene were added. The system was purged with nitrogen, and the reaction solution was heated to reflux and stirred for 180 min. The reaction solution was then cooled to 70°C and superheated on a silica gel column. The mother liquor was concentrated to one-third of its volume, and one-sixth the volume of the reaction solution in ethanol was added. The mixture was stirred at room temperature for 1 h and then filtered. The solid was then purified by recrystallization and silica gel column chromatography in 72% yield. 1 H NMR(400MHz,Chloroform-d)δ7.99(d,1H),7.84(d,4H),7.64(d,1H),7.61–7.52(m,2H),7.52–7.43(m,3H),7.42–7. 16(m,10H),7.16–7.11(m,1H),7.04(d,1H),6.87(d,2H),6.83–6.76(m,1H),6.65(d,1H),1.75(s,4H),1.30(s,12H).

[0120] Synthesis Example 2

[0121] The preparation method of HT11 is as follows: In a three-necked flask, first add 1 molar equivalent of 2-bromo-7,7,10,10-tetramethyl-13,13-diphenyl-8,9,10,13-tetrahydro-7H-indeno[1,2-b]anthracene, 1 molar equivalent of N-[1,1'-biphenyl-4-yl]-9,9-dimethyl-9H-fluorene-2-amine, 0.01 molar equivalent of tris(dibenzylideneacetone)dipalladium (Pd2(dba)3), and 0.02 molar equivalent of... Tri-tert-butylphosphine (t-Bu3P), 2 molar equivalents of sodium tert-butoxide (NaOBu-t), and 10 times the weight of the bromine-containing compound in toluene were added. The system was purged with nitrogen, and the reaction solution was heated to reflux and stirred for 180 min. The reaction solution was then cooled to 70 °C and superheated through a silica gel column. The mother liquor was concentrated to one-third of its volume, and one-sixth the volume of the reaction solution in ethanol was added. The mixture was stirred at room temperature for 1 h and then filtered. The solution was then purified by recrystallization and silica gel column chromatography, and dried to obtain a solid with a yield of 75%. 1H NMR(400MHz,Chloroform-d)δ7.86(d,1H),7.83–7.77(m,1H),7.72(d,1H),7.69–7.50(m,10H),7.49–7.44(m,1H) ,7.44–7.33(m,6H),7.32–7.16(m,14H),7.14–7.06(m,4H),6.95(d,1H),1.75(s,4H),1.58(s,6H),1.30(s,12H).

[0122] Synthesis Example 3

[0123] The preparation method of HT28 is as follows: In a three-necked flask, first add 1 molar equivalent of 2'-chloro-1,1,4,4-tetramethyl-1,2,3,4-tetrahydrospiro[1,2-a]anthracene-8,9'-oxazanthracene], 1 molar equivalent of N-[1,1'-biphenyl-4-yl]-9,9-dimethyl-9H-fluorene-2-amine, 0.01 molar equivalent of tris(dibenzylideneacetone)dipalladium (Pd2(dba)3), and 0.02 molar equivalent of tri-tert-butyl Phosphine (t-Bu3P), 2 molar equivalents of sodium tert-butoxide (NaOBu-t), and toluene (10 times the weight of the chlorine-containing compound) were added. The system was purged with nitrogen, and the reaction solution was heated to reflux and stirred for 180 min. The reaction solution was then cooled to 70 °C and superheated through a silica gel column. The mother liquor was concentrated to one-third of its volume, and ethanol (one-sixth the volume of the reaction solution) was added. The mixture was stirred at room temperature for 1 h and then filtered. The solution was then purified by recrystallization and silica gel column chromatography, and dried to obtain a solid with a yield of 70%. 1 H NMR(400MHz,Chloroform-d)δ7.87(d,1H),7.72(d,1H),7.66–7.56(m,4H),7.56–7.50(m,3H),7.50–7.44(m,2H),7.43 (d,6H),7.28–7.14(m,7H),7.11–7.04(m,3H),7.00(d,2H),6.97–6.90(m,2H),1.74(s,4H),1.58(d,6H),1.30(d,12H).

[0124] Synthesis Example 4

[0125] The preparation method of E1 is as follows: In a reaction flask, 1 molar equivalent of 6-bromo-1,2,3,4-tetrahydro-1,1,4,4-tetramethylanthracene, 1 molar equivalent of 4,6-bis(4-(naphthyl-2-yl)phenyl)-1,3,5-triazine-2-boronic acid, 0.1 molar equivalent of tetra(triphenylphosphine)palladium (Pd(PPh3)4), and 2 molar equivalents of potassium carbonate (K2CO3) are mixed. Toluene (10 times the weight of the bromine-containing compound), ethanol (1.5 times the weight of the bromine-containing compound), and deionized water (1.5 times the weight of the bromine-containing compound) are added. The system is purged with nitrogen three times. The reaction mixture is heated to reflux and stirred for 3 hours. The reaction mixture is cooled to 50°C and allowed to stand for phase separation. The upper organic phase is washed with 1.5 times the weight of the bromine-containing compound in deionized water. The organic phase is purified by regular column chromatography and recrystallization, and dried to obtain a solid with a yield of 75%. 1 H NMR(400MHz,Chloroform-d)δ8.86(t,1H),8.21(d,1H),8.03–7.84(m,5H),7.84 –7.75(m,6H),7.71–7.59(m,10H),7.57–7.43(m,7H),1.75(s,4H),1.30(s,12H).

[0126] Synthesis Example 5

[0127] The preparation method of E9 is as follows: In a reaction flask, 1 molar equivalent of 2-chloro-7,7,10,13,13-hexamethyl-8,9,10,13-tetrahydro-7H-indeno[1,2-b]anthracene, 1 molar equivalent of (4-(5a,9a-dihydrodibenzofuran-3-yl)-6-phenylpyrimidine-2-boronic acid, 0.1 molar equivalent of tetra(triphenylphosphine-palladium) (Pd(PPh3)4) and 2 molar equivalents of potassium carbonate (K2CO3) are mixed. The mixture was combined with 10 times its weight of toluene containing the chlorine compound, 1.5 times its weight of ethanol containing the chlorine compound, and 1.5 times its weight of deionized water containing the chlorine compound. The system was purged with nitrogen three times. The reaction mixture was heated to reflux and stirred for 3 hours. The reaction mixture was cooled to 50°C and allowed to stand to separate into layers. The upper organic phase was washed with 1.5 times its weight of deionized water containing the chlorine compound. The organic phase was purified by regular column chromatography and recrystallization, and dried to obtain a solid with a yield of 70%. 1 H NMR(400MHz,Chloroform-d)δ8.51(d,1H),8.24–8.18(m,3H),8.16(s,1H),8.00(d,1H),7.91(t,3H),7. 86(d,1H),7.76(d,1H),7.67–7.51(m,3H),7.51–7.32(m,6H),1.75(s,4H),1.58(s,6H),1.30(s,12H).20

[0128] Synthesis Example 6

[0129] The preparation method of E14 is as follows: In a reaction flask, 1 molar equivalent of 2-chloro-7,7,10,10-tetramethyl-7,8,9,10-tetrahydrospiro[1,2-b]anthracene-13,9'-oxazanthracene], 1 molar equivalent of (4-([1,1'-biphenyl]-4-yl)-6-phenyl-1,3,5-triazin-2-yl)boronic acid, 0.1 molar equivalent of tetratriphenylphosphine palladium (Pd(PPh3)4) and 2 molar equivalents of potassium carbonate (K2CO3) are mixed, and 10 times the weight of the chlorinated compound in toluene, 1.5 times the weight of the chlorinated compound in ethanol and 1.5 times the weight of the chlorinated compound in deionized water are added. The system is purged with nitrogen 3 times, the reaction mixture is heated to reflux, and the reaction is stirred for 3 hours. The reaction mixture was cooled to 50°C and allowed to stand to separate into layers. The upper organic phase was washed with 1.5 times the weight of the chlorinated compound in deionized water. The organic phase was purified by regular column chromatography and recrystallization, and dried to obtain a solid with a yield of 74%. 1 H NMR(400MHz,Chloroform-d)δ8.62–8.49(m,2H),7.96–7.85(m,2H),7.82(d,1H),7.78–7.70(m,3H),7.68–7.61(m,3H) ,7.61–7.54(m,4H),7.52–7.30(m,6H),7.26(m,2H),7.14(d,2H),7.06(m,2H),6.99(m,2H),1.75(s,4H),1.30(s,12H).

[0130] Synthesis Example 7

[0131] The preparation method of RH2 is as follows: In a three-necked flask, first add 1 molar equivalent of 4-chlorobiphenyl, 1 molar equivalent of 8,8,11,11-tetramethyl-2-(9-phenyl-9,9a-dihydro-4aH-carbazole-6-yl)-5,8,9,10,11,13b-hexahydro-4aH-naphtho[2,3-b]carbazole, 0.01 molar equivalent of tris(dibenzylideneacetone)dipalladium (Pd2(dba)3), and 0.02 molar equivalent of... An equivalent amount of tri-tert-butylphosphine (t-Bu3P), 2 molar equivalents of sodium tert-butoxide (NaOBu-t), and 10 times the weight of the chlorine-containing compound in toluene were added. The system was purged with nitrogen, and the reaction solution was heated to reflux and stirred for 180 min. The reaction solution was then cooled to 70°C and superheated on a silica gel column. The mother liquor was concentrated to one-third of its volume, and one-sixth the volume of the reaction solution in ethanol was added. The mixture was stirred at room temperature for 1 h and then filtered. Further purification was achieved by recrystallization and silica gel column chromatography. 1¹H NMR (400 MHz, Chloroform-d) δ 9.12 (d, 1H), 8.14 (d, 1H), 8.09–8.03 (m, 1H), 7.80 (m, 1H), 7.72–7.56 (m, 10H), 7.55–7.42 (m, 8H), 7.42–7.13 (m, 7H), 1.75 (s, 4H), 1.30 (s, 12H). Drying yielded a solid, 78% yield.

[0132] Synthesis Example 8

[0133] The preparation method of RH7 is as follows: In a three-necked flask, first add 1 molar equivalent of 2-chloro-4,6-diphenyl-1,3,5-triazine, 1 molar equivalent of 8,8,11,11-tetramethyl-5,8,9,10,11,13b-hexahydro-4aH-naphtho[2,3-b]carbazole, 0.01 molar equivalent of tris(dibenzylacetone)dipalladium (Pd2(dba)3), 0.02 molar equivalent of tritert-tert-butylphosphine (t-Bu3P), 2 molar equivalents of sodium tert-butoxide (NaOBu-t), and then add 10 times the weight of the chlorine-containing compound in toluene. The system is purged with nitrogen, the reaction solution is heated to reflux, and the reaction is stirred for 180 min. The reaction solution is cooled to 70℃ and superheated on a silica gel column while still hot. The mother liquor is concentrated to one-third of its volume, and one-sixth the volume of the reaction solution in ethanol is added. The mixture is stirred at room temperature for 1 h, filtered, and then... 1 ¹H NMR (400 MHz, Chloroform-d) δ 8.65–8.50 (m, 2H), 8.27–8.16 (m, 1H), 7.95–7.86 (m, 2H), 7.70–7.54 (m, 7H), 7.54–7.23 (m, 10H), 1.75 (d, 4H), 1.30 (s, 12H). Drying yielded a solid, 73% yield.

[0134] Synthesis Example 9

[0135] The preparation method of RH18 is as follows: In a three-necked flask, first add 1 molar equivalent of 4-chlorobiphenyl, and 1 molar equivalent of 10,10,13,13-tetramethyl-5-phenyl-4a,5,6a,7,10,11,12,13,15b,16b decahydroindolon[2,3-b]naphtho[2,3-h]carbazole, 0.01 molar equivalent of tris(dibenzylideneacetone)dipalladium (Pd2(dba)3), and 0.02 molar equivalent of tri-tert-butyl Phosphine (t-Bu3P), 2 molar equivalents of sodium tert-butoxide (NaOBu-t), and toluene (10 times the weight of the chlorine-containing compound) were added. The system was purged with nitrogen, and the reaction solution was heated to reflux and stirred for 180 min. The reaction solution was then cooled to 70 °C and superheated on a silica gel column. The mother liquor was concentrated to one-third of its volume, and ethanol (one-sixth the volume of the reaction solution) was added. The mixture was stirred at room temperature for 1 h and then filtered. The solution was then purified by recrystallization and silica gel chromatography, and dried to obtain a solid with a yield of 75%. 1 H NMR(400MHz,Chloroform-d)δ8.90(d,1H),8.15–8.02(m,1H),7.71–7.49(m,11H),7.49–7.30(m,9H),7.30–7.24(m,2H),1.75(d,4H),1.30(s,12H).

[0136] Synthesis Example 10

[0137] The preparation method of BH2 is as follows: In a reaction flask, 1 molar equivalent of 6-bromo-1,2,3,4-tetrahydro-1,1,4,4-tetramethylanthracene, 1 molar equivalent of 1,2,3,4,5,6,7,8-octadeuterium-10-(dibenzo[b,d]furan-2-yl)anthracene-9-yl)boronic acid, 0.1 molar equivalent of tetra(triphenylphosphine)palladium (Pd(PPh3)4), and 2 molar equivalents of potassium carbonate (K2CO3) are mixed. Toluene, 1.5 molar equivalents of bromo-containing compound by weight, ethanol, and deionized water are added. The system is purged with nitrogen three times. The reaction mixture is heated to reflux and stirred for 3 hours. The reaction mixture is cooled to 50°C and allowed to stand for phase separation. The upper organic phase is washed with 1.5 molar equivalents of bromo-containing compound by weight of deionized water. The organic phase is purified by regular column chromatography and recrystallization, and dried to obtain a solid with a yield of 81%. 1 H NMR(400MHz,Chloroform-d)δ8.03(m,1H),7.97–7.92(m,1H),7.84(m,1H),7.66–7. 56(m,3H),7.57–7.43(m,4H),7.38(m,1H),7.28(d,1H),1.75(d,4H),1.30(s,12H).

[0138] Synthesis Example 11

[0139] The preparation method of BH9 is as follows: In a reaction flask, 1 molar equivalent of 3-chloro-8,8,11,11-tetramethyl-4a,8,9,10,13b-hexahydroanthracene[2,3-b]benzofuran, 1 molar equivalent of 1,2,3,4,5,6,7,8-octadeuterium-10-(dibenzo[b,d]furan-2-yl)anthracene-9-yl)boronic acid, 0.1 molar equivalent of tetrakis(triphenylphosphine)palladium (Pd(PPh3)4) and 2 molar equivalents of potassium carbonate (K2CO3) are mixed, and 10 times the weight of the chlorinated compound in toluene, 1.5 times the weight of the chlorinated compound in ethanol and 1.5 times the weight of the chlorinated compound in deionized water are added. The system is purged with nitrogen three times, the reaction mixture is heated to reflux, and the reaction is stirred for 3 hours. The reaction mixture was cooled to 50°C and allowed to stand to separate into layers. The upper organic phase was washed with 1.5 times the weight of the chlorinated compound in deionized water. The organic phase was purified by regular column chromatography and recrystallization, and dried to obtain a solid with a yield of 76%. 1 H NMR(400MHz,Chloroform-d)δ8.01(d,1H),7.98–7.95(m,1H),7.85–7.72(m,4H),7.68–7.58(m,2H),7.58–7.30(m,6H),1.74(s,4H),1.30(s,12H).

[0140] Synthesis Example 12

[0141] The preparation method of RD2 is as follows:

[0142]

[0143] Four molar equivalents of RD2-1 and one molar equivalent of iridium trichloride hydrate were dissolved in 10 times the weight of RD2-1 in ethylene glycol diethyl ether and 1 times the weight of RD2-1 in water. The reaction mixture was heated to reflux under nitrogen protection and stirred for 24 hours. After cooling the reaction mixture to room temperature, 10 times the weight of RD2-1 in water was added dropwise, resulting in the precipitation of a large amount of solid. The solid was filtered, and the concentration of the filtrate was measured. The solid dried to obtain a red solid, which was RD2-2, with a yield of 70%.

[0144] One molar equivalent of compound RD2-2 and six molar equivalents of a diketone were dissolved in 10 times the weight of RD2-2 in ethylene glycol diethyl ether. Six molar equivalents of sodium carbonate were added, and the mixture was protected under nitrogen atmosphere. The mixture was stirred at 60°C for 24 hours. The reaction solution was purified by silica gel column chromatography and recrystallization, and dried to give red solid RD2 in 50% yield. 1H NMR(400MHz,Chloroform-d)δ7.86(d,2H),7.79–7.67(m,4H),7.52(d,2H),7.27(d,4H),7.03–6.74( m,2H),5.65(d,1H),2.55(s,8H),2.42(d,10H),1.74(p,8H),1.73–1.38(m,22H),1.36–1.29(m,24H).

[0145] Synthesis Example 13

[0146] The preparation method of RD4 is as follows:

[0147]

[0148] Four molar equivalents of RD4-1 and one molar equivalent of iridium trichloride hydrate were dissolved in 10 times the weight of RD4-1 in ethylene glycol diethyl ether and 1 times the weight of RD4-1 in water. The reaction mixture was heated to reflux under nitrogen protection and stirred for 24 hours. After cooling the reaction mixture to room temperature, 10 times the weight of RD4-1 in water was added dropwise, resulting in the precipitation of a large amount of solid. The solid was filtered, and the filtrate was concentrated and dried to obtain a red solid, RD4-2, with a yield of 75%.

[0149] One molar equivalent of compound RD4-2 and six molar equivalents of a diketone were dissolved in 10 times the weight of RD4-2 in ethylene glycol diethyl ether. Six molar equivalents of sodium carbonate were added, and the mixture was purged with nitrogen. The mixture was stirred at 60°C for 24 hours. The reaction solution was purified by silica gel column chromatography and recrystallization, and dried to give red solid RD4, in 42% yield. 1 H NMR(400MHz,Chloroform-d)δ8.11(s,2H),8.07(s,2H),8.00(d,2H),7.91(d,2H),7.65(d,2H),7.57–7.49(m, 6H),6.96(d,2H),5.89(p,1H),2.47(s,6H),2.41(s,6H),2.36(s,6H),2.08(d,6H),1.87(s,8H),1.30(d,24H).

[0150] Comparative Examples 1 to 13 provided compounds HT-ref1, HT-ref2, HT-ref3, E-ref1, E-ref2, E-ref3, RH-ref1, RH-ref2, RH-ref3, BH-Ref1, BH-Ref2, RD-Ref1, and RD-Ref2, respectively; the structures of the compounds are shown below;

[0151]

[0152] Example 14

[0153] This embodiment provides a method for fabricating a blue fluorescent device, including the following steps: forming a transparent anode ITO film layer with a thickness of 150 nm on a glass substrate 1 to obtain a first electrode 2 as the anode, followed by vapor deposition. A mixture of HT2 and a hole transport material was used as the hole injection layer 3, with a mixing ratio of 3:97 (mass ratio). A 100 nm thick layer of HT2 was then deposited to obtain the first hole transport layer 4, followed by the deposition of a 20 nm thick layer of the compound. A second hole transport layer 5 was obtained, and then compound BH2 material was deposited at a deposition rate of 95:5. 30nm, fabricate blue light-emitting units (fluorescent light-emitting layer 6), then evaporate 10nm. A hole-blocking layer 7 is formed, and then compound E1 is deposited by vapor deposition. An electron transport layer 8 with a thickness of 30 nm is formed by mixing materials in a 4:6 mass ratio. Then, a ytterbium layer with a thickness of 3 nm and a magnesium-silver layer with a thickness of 10 nm (mass ratio 1:9) are formed sequentially as the second electrode 9. Finally, a 70 nm capping layer material is deposited on top of this. A covering layer 10 is formed.

[0154] Comparative Example 14

[0155] The specific implementation of Comparative Example 14 is the same as that of Example 14, except that HT2 in the hole injection layer 3 and the first hole transport layer 4 is replaced with HT2 that has been sealed and heated for 240 hours in the thermal stability test; E1 of the compound in the electron transport layer 8 is replaced with E1 that has been sealed and heated for 240 hours in the thermal stability test; and BH2 of the compound in the blue light emitting unit (light emitting layer 6) is replaced with BH2 that has been sealed and heated for 240 hours in the thermal stability test.

[0156] Comparative Example 15

[0157] The specific implementation of Comparative Example 15 is the same as that of Example 14, except that HT-ref1 is used to replace HT2 in hole injection layer 3 and first hole transport layer 4, E-ref1 is used to replace E1 in electron transport layer 8, and BH-ref1 is used to replace compound BH2 in blue light emitting unit (light emitting layer 6).

[0158] Comparative Example 16

[0159] The specific implementation of Comparative Example 16 is the same as that of Example 14, except that the hole injection layer 3 and the first hole transport layer 4 are replaced by HT-ref1 which has been sealed and heated for 240 hours in the thermal stability test, and the electron transport layer 8 is replaced by E-ref1 which has been sealed and heated for 240 hours in the thermal stability test, and the blue light emitting unit (fluorescent light emitting layer 6) is replaced by BH-ref1 which has been sealed and heated for 240 hours in the thermal stability test.

[0160] Example 15

[0161] This embodiment provides a method for fabricating a red phosphorescent device, including the following steps: forming a transparent anode ITO film layer with a thickness of 150 nm on a glass substrate 1 to obtain a first electrode 102 as the anode, followed by vapor deposition. With hole transport materials The mixed material was used as hole injection layer 3, with a mixing ratio of 3:97 (mass ratio), followed by the deposition of a 100nm thick layer. The first hole transport layer 4 was obtained, and then a compound with a thickness of 100 nm was deposited by evaporation. A second hole transport layer 5 was obtained, and then 40 nm of compound RH2 and compound RD2 were deposited at a 95:5 evaporation ratio to fabricate a red light emitting unit 6, followed by the deposition of a 10 nm layer. A hole-blocking layer 7 is formed, and then vapor-deposited. and An electron transport layer 8 with a thickness of 30 nm is formed by mixing in a ratio of 4:6 (mass ratio), followed by the formation of a magnesium-silver layer with a thickness of 100 nm (mass ratio of 1:9) as the second electrode 9.

[0162] Comparative Example 17

[0163] The specific implementation of Comparative Example 17 is the same as that of Example 15, except that the compounds RH2 and RD2 in the red light emitting unit 6 are replaced with RH2 and RD2 that have been sealed and heated for 240 hours in the thermal stability test.

[0164] Comparative Example 18

[0165] The specific implementation of Comparative Example 18 is the same as that of Example 15, except that the compounds RH2 and RD2 in the red light emitting unit 6 are replaced by RH-ref1 and RD-ref1, respectively.

[0166] Comparative Example 19

[0167] The specific implementation of Comparative Example 19 is the same as that of Example 15, except that RH-ref1 and RD-ref1 in the red light emitting unit 6 are replaced by RH-ref1 and RD-ref1 that have been sealed and heated for 240 hours in the thermal stability test.

[0168] Performance testing

[0169] 1. Comparison of evaporation temperatures:

[0170] The evaporation temperatures of the compounds in Examples 1-13 and the corresponding naphthalene-containing compounds in Comparative Examples 1-13 were tested. Experimental method: 5g of material was added to a vacuum chamber containing a heating source and a 50cm³ boron nitride crucible. The vacuum level was 5×10⁻⁸ torr, and the temperature was monitored at an evaporation rate of 10A / h.

[0171] The compounds in Examples 1-13 exhibited lower evaporation temperatures compared to the naphthalene-containing compounds in Comparative Examples 1-13. The results are shown in Table 1.

[0172] 2. Thermal stability test:

[0173] Thermal stability tests were conducted on the compounds in Examples 1, 4, 7, 10, and 12, and the compounds in Comparative Examples 1, 4, 7, 10, and 12. The experimental method was as follows: A quartz tube with a diameter of 10 mm and a length of 150 mm was prepared, with one end sealed and the other unsealed. The test material was then added to the unsealed end. The quartz tube was evacuated to 1*10-6 torr, and the unsealed end was heat-sealed. The sealed quartz tube was then placed in a heating furnace and heated to a temperature of [temperature missing]. The temperature was increased by 40℃ and the heating time was 240 hours. Purity was determined by liquid chromatography, and the experimental results are shown in Table 2.

[0174] 3. The device tests in Examples 14 and 14-16 were performed using a combination of a Keithley power supply and an MS-75 spectroradiometer. The voltage was 10 mA / cm². 2 The voltage at that time, with an efficiency of 10mA / cm 2 The current efficiency at that time is expressed as the color coordinate CIEy value divided by the value (unit: Cd / A / CIEy), and the lifetime is 10 mA / cm. 2 The time required for the brightness to decay to 95% of the initial brightness under current conditions. Using device example 14 as the 100% result, Example 14: voltage 4.0V, efficiency 141Cd / A / CIEy, 95% lifetime 650 hours. The results of the comparative examples are shown in Table 3.

[0175] The device tests in Examples 15 and 17-19 were performed using a combination of a Keithley power supply and an MS-75 spectroradiometer. The voltage was 10 mA / cm². 2 The voltage at that time, with an efficiency of 10mA / cm 2 The current efficiency at that time is expressed as the color coordinate CIEy value divided by the value (unit: Cd / A / CIEy), and the lifetime is 10 mA / cm. 2 The time required for the brightness to decay to 95% of the initial brightness under current conditions. Using device example 15 as the 100% result, Example 15: voltage 3.7V, efficiency 173Cd / A / CIEy, 95% lifetime 3200 hours. The results of the comparative example are shown in Table 4.

[0176] Table 1

[0177]

[0178]

[0179] Table 2

[0180]

[0181]

[0182] Table 3

[0183] Voltage efficiency life Example 14 100％ 100％ 100％ Comparative Example 14 100％ 98％ 98％ Comparative Example 15 105％ 97％ 90％ Comparative Example 16 110％ 90％ 70％

[0184] Table 4

[0185] Voltage efficiency life Example 15 100％ 100％ 100％ Comparative Example 17 100％ 97％ 95％ Comparative Example 18 102％ 95％ 89％ Comparative Example 19 104％ 91％ 80％

Claims

1. An OLED light-emitting organic material, characterized in that, comprise a hole transport layer material, a light emitting layer material, and an electron transport layer material; the light emitting layer material comprises a fluorescent light emitting layer material or a phosphorescent light emitting layer material; (I) when the light emitting layer material is a phosphorescent light emitting layer material, the phosphorescent light emitting layer material comprises a phosphorescent light emitting host material and a phosphorescent light emitting guest material; the phosphorescent light emitting host material is a red phosphorescent light emitting host material; wherein the red phosphorescent light emitting host material has a structure shown in any one of Formula 8-1, Formula 9-1; the structure of Formula 8-1 is Formula 8-1 In Formula 8-1, R1, R2, R3, R4 are methyl, R5, R6 are hydrogen, Rb is hydrogen, n is 2, p is 1, Ar1 is biphenyl or triazine, and Ar2 is hydrogen or carbazyl; the structure of Formula 9-1 is Formula 9-1 In Formula 9-1, R1, R2, R3, R4 are methyl, R5, R6 are hydrogen, Ra, Rc are both hydrogen, n is 2, m, q are both 1, X1, X2 are N, R7 is biphenyl, and R8 is phenyl; the phosphorescent light emitting guest material is a red phosphorescent light emitting guest material, and the red phosphorescent light emitting guest material has a structure shown in Formula 13; Formula 13 In Formula 13, R1, R2, R3, R4 are methyl, R5, R6 are hydrogen, Ra are both hydrogen, n is 2, m, q are both 1, p are both 2, R7, R8 are fused into a ring, R9 is methyl, R10 is hydrogen, and R11, R12 are methyl or cyclohexyl; (II) when the light emitting layer material is a fluorescent light emitting layer material, the fluorescent light emitting layer material comprises a blue fluorescent light emitting host material, and the blue fluorescent light emitting host material has a structure shown in any one of Formula 10, 11; the structure of Formula 10 is Formula 10 In Formula 10, R1, R2, R3, R4are methyl, R5, R6are hydrogen, Ra is hydrogen, n is 2, m is 1, L is a single bond, R7-R 14 are all deuterium, and Ar is dibenzofuranyl; the structure of Formula 11 is Formula 11 In Formula 11, R1, R2, R3, R4are methyl, R5, R6are hydrogen, Ra is hydrogen, n is 2, m is 1, X is O, L is a single bond, R7-R 14 are all deuterium, and Ar is dibenzofuranyl. All hydrogen atoms in the above Formula 8-1, 9-1, 10, 11, 13 can be substituted by deuterium atoms.

2. The OLED light-emitting organic material of claim 1, wherein, The hole transport layer material has a structure shown in any one of Formula 2, Formula 3, Formula 4; the structure of Formula 2 is Formula 2 In Formula 2, R1-R6 are each independently selected from a hydrogen atom, a substituted or unsubstituted C1-C4 alkyl group, n is 1 or 2; Ra is selected from a hydrogen atom, a C1-C30 alkyl group, a C3-C30 cycloalkyl or heterocycloalkyl group, a C6-C30 aryl group, and a C3-C30 heteroaryl group; m is 0-3, L1, L2, L3 are selected from a single bond, a substituted or unsubstituted C6-C30 arylene group or C3-C30 heteroarylene group; Ar1, Ar2 are each independently selected from a substituted or unsubstituted C6-C30 aryl group or C3-C30 heteroaryl group; all hydrogen atoms in Formula 2 can be substituted by deuterium atoms, C1-C6 alkyl groups, C3-C6 cycloalkyl or heterocycloalkyl groups; the structure of Formula 3 is Formula 3 In formula 3, R1~R6 are each independently selected from a hydrogen atom, a substituted or unsubstituted C1~C4 alkyl group, n is 1 or 2; Ra, Rb are each independently selected from a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl or heterocycloalkyl group, a C6~C30 aryl group, a C3~C30 heteroaryl group; X is selected from CR7R8, NR9, O, S, R7~R9 are selected from a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl group, a C2~C30 heterocycloalkyl group, R7~R8 can be connected into an aliphatic ring with any bond; m is 0~2; p is 0~3; L is selected from a single bond, a substituted or unsubstituted C6~C30 arylene group or C3~C30 heteroarylene group; Ar1, Ar2 are each independently selected from a substituted or unsubstituted C6~C30 aryl group or C3~C30 heteroaryl group; all hydrogen atoms in formula 3 can be substituted by a deuterium atom, a C1~C6 alkyl group, a C3~C6 cycloalkyl or heterocycloalkyl group; The structure of the formula 4 is Formula 4 R1~R6in formula 4 are each independently selected from a hydrogen atom, a substituted or unsubstituted C1~C4 alkyl group, n is 1 or 2; Ra represents a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl or heterocycloalkyl group, a C6~C30 aryl group, a C3~C30 heteroaryl group; m is selected from 0~2; R7~R 18 a hydrogen atom, a substituted or unsubstituted C1~C30 alkyl group, a substituted or unsubstituted C3~C30 cycloalkyl or heterocycloalkyl group, a substituted or unsubstituted C6~C30 aryl group, a substituted or unsubstituted C3~C30 heteroaryl group, R7~R 18 at least one of which is ; L is selected from a single bond, a substituted or unsubstituted C6~C30 arylene group or C3~C30 heteroarylene group; Ar1, Ar2 are each independently selected from a substituted or unsubstituted C6~C30 aryl group or C3~C30 heteroaryl group; all hydrogen atoms in formula 4 can be substituted with a deuterium atom, a C1~C6 alkyl group, a C3~C6 cycloalkyl or heterocycloalkyl group.

3. The OLED light-emitting organic material of claim 1, wherein, The electron transport layer material has any one of structures shown in formula 5, formula 6, formula 7; The structure of the formula 5 is Formula 5 In formula 5, R1~R6 are each independently selected from a hydrogen atom, a substituted or unsubstituted C1~C4 alkyl group, n is 1 or 2; Ra represents a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl or heterocycloalkyl group, a C6~C30 aryl group, a C3~C30 heteroaryl group; m is selected from 0~2; L is selected from a single bond, a substituted or unsubstituted C6~C30 arylene group or C3~C30 heteroarylene group; all hydrogen atoms in formula 5 can be substituted by a deuterium atom, a C1~C6 alkyl group, a C3~C6 cycloalkyl or heterocycloalkyl group; The electron transport layer includes formula 6; Formula 6 In formula 6, R1~R6 are each independently selected from a hydrogen atom, a substituted or unsubstituted C1~C4 alkyl group, n is 1 or 2; Ra, Rb are each independently selected from a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl or heterocycloalkyl group, a C6~C30 aryl group, a C3~C30 heteroaryl group; X is selected from CR7R8, NR9, O, S, R7~R9 are selected from a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl group, a C2~C30 heterocycloalkyl group, R7~R8 can be connected into an aliphatic ring with any bond; m is 0~2; p is 0~3; L is selected from a single bond, a substituted or unsubstituted C6~C30 arylene group or C3~C30 heteroarylene group; all hydrogen atoms in formula 6 can be substituted by a deuterium atom, a C1~C6 alkyl group, a C3~C6 cycloalkyl or heterocycloalkyl group; The structure of the formula 7 is Formula 7 In formula 7, R1~R6 are each independently selected from a hydrogen atom, a substituted or unsubstituted C1~C4 alkyl group, n is 1 or 2; Ra represents a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl or heterocycloalkyl group, a C6~C30 aryl group, a C3~C30 heteroaryl group; X is selected from CR7R8, NR9, O, S, R7~R9 are selected from a hydrogen atom, a C1~C30 alkyl group, a C3~C30 cycloalkyl group, a C2~C30 heterocycloalkyl group, R7~R8 can be connected to form an aliphatic ring with any bond; m is selected from 0~2; R7~R 18 a hydrogen atom, a substituted or unsubstituted C1~C30 alkyl group, a substituted or unsubstituted C3~C30 cycloalkyl or heterocycloalkyl group, a substituted or unsubstituted C6~C30 aryl group, a substituted or unsubstituted C3~C30 heteroaryl group, R7~R 18 at least one of which is ; L is selected from a single bond, a substituted or unsubstituted C6~C30 arylene group or C3~C30 heteroarylene group; all hydrogen atoms in formula 7 can be substituted with a deuterium atom, a C1~C6 alkyl group, a C3~C6 cycloalkyl or heterocycloalkyl group; Electron acceptor in formula 5, formula 6, formula 7 is each independently selected from naphthyl, anthryl, phenanthryl, pyrenyl, perylenyl, fluorenyl, fluoranthenyl, pyridyl, pyrrolyl, pyrimidinyl, pyridazinyl, imidazolyl, pyrazolyl, isoxazolyl, thiazolyl, isothiazolyl, triazolyl, diazolyl, thiadiazolyl, dithiazolyl, tetrazolyl, pyranyl, thiopyranyl, pyrazinyl, oxazinyl, thiazinyl, dioxinyl, triazinyl, tetrazinyl, quinolinyl, isoquinolinyl, quinazolinyl, quinoxalinyl, naphthrydinyl, acridinyl, xanthenyl, phenanthridinyl, phenanthrolinyl, indolyl, indolinyl, indazolyl, phthalazinyl, pyridopyrimidinyl, pyridopyrazinyl, pyrazinopyrazinyl, benzothiazolyl, benzoxazolyl, benzimidazolyl, benzothiophenyl, benzofuranyl, dibenzothiophenyl, dibenzofuranyl, carbazolyl, benzocarbazolyl, dibenzocarbazolyl, indolocarbazolyl, indolophenanthrolinyl, phenoxazinyl, phenothiazinyl, imidazopyridinyl, imidazophenanthridinyl, benzimidazolquinazolinyl, benzimidazolphenanthridinyl, spiro[fluorene-9,9'-xanthene], phenanthrolinyl, dinaphthofuranyl, naphthobenzofuranyl, dinaphthothiophenyl, naphthobenzothiophenyl, triphenylphosphine oxide, triphenylborane, 1-10 phenanthroline, cyano-substituted aryl or heteroaryl, fluorine-substituted aryl or heteroaryl, trifluoromethyl-substituted aryl or heteroaryl.

4. An OLED light-emitting device comprising the OLED light-emitting organic material according to any one of claims 1-3, characterized in that, The OLED light-emitting device at least includes an anode, a cathode and an organic layer.

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