CN-117466896-B - Organic compound, organic electroluminescent device and electronic device

Abstract

The application belongs to the technical field of organic electroluminescence, and relates to an organic compound, an organic electroluminescent device using the same and an electronic device. The organic compound is formed by connecting an aromatic ring of condensed tetramethyl cyclohexane and indolocarbazole, and can be used in an organic electroluminescent device to remarkably improve the performance of the organic electroluminescent device.

Inventors

• XU XIANBIN
• YANG LEI

Assignees

• 陕西莱特光电材料股份有限公司

Dates

Publication Date

20260508

Application Date

20220921

Claims (9)

1. 1. An organic compound, characterized in that the organic compound has a structure as shown in formula 1, 1 (1) Wherein ring A is selected from benzene ring, dibenzofuran ring, dibenzothiophene ring or dimethylfluorene ring; ring C, ring B and ring D are the same or different and are each independently selected from benzene rings or naphthalene rings; L 1 and L 2 are the same or different and are each independently selected from a single bond, a substituted or unsubstituted phenylene group, a substituted or unsubstituted naphthylene group, a substituted or substituted biphenylene group; The substituents in L 1 and L 2 are the same or different and are each independently selected from deuterium or phenyl; ar is selected from substituted or unsubstituted phenyl, substituted or unsubstituted naphthyl, substituted or unsubstituted biphenyl, substituted or unsubstituted fluorenyl and substituted or unsubstituted phenanthryl; Substituents in Ar are the same or different and are each independently selected from deuterium, fluorine, cyano, methyl, ethyl, n-propyl, isopropyl, tert-butyl, tridentate methyl or phenyl; R 1 、R 2 or R 3 are the same and are selected from deuterium; n 1 represents the number of substituents R 1 , n 1 is selected from 0,1, 2, 3, 4,5 or 6, when n 1 is greater than 1, any two R 1 are the same or different; n 2 represents the number of substituents R 2 , n 2 is selected from 0, 1,2,3 or 4, when n 2 is greater than 1, any two R 2 are the same or different; n 3 represents the number of substituents R 3 , n 3 is selected from 0,1, 2, 3, 4,5 or 6, and when n 3 is greater than 1, any two R 3 are the same or different.
2. 2. The organic compound according to claim 1, wherein the organic compound is selected from compounds represented by formula 1-1, formula 1-2, formula 1-3, formula 1-4, formula 1-5, formula 1-6, formula 1-7, formula 1-8, formula 1-9, formula 1-10, formula 1-11, formula 1-12, formula 1-13, formula 1-14, formula 1-15, formula 1-16, formula 1-17, formula 1-18, formula 1-19, formula 1-20, formula 1-21, formula 1-22, formula 1-23, formula 1-24, or formula 1-25:
3. 3. The organic compound according to claim 1, wherein, Selected from the group consisting of: 。
4. 4. the organic compound according to claim 1, wherein, Selected from the group consisting of: 。
5. 5. an organic compound, characterized in that the organic compound is selected from the group consisting of: 。
6. 6. an organic electroluminescent device comprising an anode and a cathode disposed opposite to each other, and a functional layer disposed between the anode and the cathode, wherein the functional layer comprises the organic compound according to any one of claims 1 to 5.
7. 7. The organic electroluminescent device according to claim 6, wherein the functional layer comprises an organic light-emitting layer comprising the organic compound.
8. 8. The organic electroluminescent device of claim 6, wherein the organic electroluminescent device is a red organic electroluminescent device.
9. 9. An electronic device comprising the organic electroluminescent device according to any one of claims 6 to 8.

Description

Organic compound, organic electroluminescent device and electronic device Technical Field The application relates to the technical field of organic electroluminescence, in particular to an organic compound, an organic electroluminescent device using the same and an electronic device. Background In recent years, a self-luminous organic light emitting device capable of being driven at a low voltage has been attracting attention as a new generation display device because of its excellent performance such as viewing angle and contrast, and the ease of realization of thin and light-weight, low power consumption, and wide color reproduction range without requiring a backlight, as compared with a liquid crystal display panel which is a main-stream flat panel display device. A variety of substances that can be used in organic light emitting elements have been disclosed so far, but organic light emitting elements using the presently known substances are not easy to realize in use because of their higher driving voltage, lower efficiency and shorter service life, and therefore it is required to develop substances with excellent characteristics to realize organic light emitting elements that are driven at low voltages and have higher luminance and longer service life. Disclosure of Invention The application aims to provide an organic compound, and an organic electroluminescent device and an electronic device using the same, which have high luminous efficiency and service life. In order to achieve the above object, a first aspect of the present application provides an organic compound having a structure as shown in formula 1: wherein ring A is selected from benzene ring, dibenzofuran ring, dibenzothiophene ring or dimethylfluorene ring; ring C, ring B and ring D are the same or different and are each independently selected from aromatic rings having 6 to 14 carbon atoms; L 1 and L 2 are each independently selected from a single bond, a substituted or unsubstituted arylene group having 6 to 30 carbon atoms, a substituted or unsubstituted dibenzofuranylene group, a substituted or unsubstituted dibenzothiophenylene group; ar is selected from substituted or unsubstituted aryl, substituted or unsubstituted dibenzofuranyl, substituted or unsubstituted dibenzothienyl and substituted or unsubstituted carbazolyl with 6-40 carbon atoms; R 1、R2 and R 3 are the same or different and are each independently selected from deuterium, cyano, halogen group, alkyl group having 1 to 10 carbon atoms, haloalkyl group having 1 to 10 carbon atoms, deuterated alkyl group having 1 to 10 carbon atoms, trialkylsilyl group having 3 to 12 carbon atoms, aryl group having 6 to 20 carbon atoms, cycloalkyl group having 3 to 10 carbon atoms or deuterated aryl group having 6 to 20 carbon atoms; n 1 represents the number of substituents R 1, n 1 is selected from 0,1, 2, 3, 4,5 or 6, when n 1 is greater than 1, any two R 1 are the same or different; n 2 represents the number of substituents R 2, n 2 is selected from 0, 1,2,3 or 4, when n 2 is greater than 1, any two R 2 are the same or different; n 3 represents the number of substituents R 3, n 3 is selected from 0,1, 2, 3, 4,5 or 6, when n 3 is greater than 1, any two R 3 are the same or different; the substituents in L 1、L2 and Ar are the same or different and are each independently selected from deuterium, cyano, halogen group, alkyl group with 1-10 carbon atoms, haloalkyl group with 1-10 carbon atoms, deuterated alkyl group with 1-10 carbon atoms, trialkylsilyl group with 3-12 carbon atoms, aryl group with 6-20 carbon atoms, dibenzofuranyl, dibenzothienyl, carbazolyl, cycloalkyl group with 3-10 carbon atoms or deuterated aryl group with 6-20 carbon atoms. The second aspect of the application provides an organic electroluminescent device comprising an anode and a cathode which are oppositely arranged, and a functional layer arranged between the anode and the cathode, wherein the functional layer comprises the organic compound of the first aspect of the application; preferably, the functional layer includes an organic light emitting layer including the organic compound; preferably, the organic electroluminescent device is a red organic electroluminescent device. A third aspect of the application provides an electronic device comprising an organic electroluminescent device according to the second aspect of the application. The organic compound core group is formed by connecting an aromatic ring of condensed tetramethyl cyclohexane and indolocarbazole. The structure of tetramethyl cyclohexane is condensed with benzene ring or dibenzo five-membered ring, and then the hole transmission capability of the compound can be further enhanced by super-conjugated effect. In addition, the four methyl groups of the tetramethyl cyclohexane have certain steric hindrance, so that the intermolecular accumulation of the compound can be finely regulated and controlled, and the compound can form a better amorphous film. When