CN-115772162-B - Organic electroluminescent material based on triazine ring structure and organic electroluminescent device

CN115772162BCN 115772162 BCN115772162 BCN 115772162BCN-115772162-B

Abstract

The invention discloses an organic electroluminescent material and an organic electroluminescent device based on a triazine ring structure, and relates to the field of organic electroluminescent materials, wherein the structural formula of the organic electroluminescent material is shown as the following formula (1): Wherein R1 and R2 are each independently a substituted or unsubstituted C3-C6 cycloalkyl group, a substituted or unsubstituted C6-C30 aromatic group, or a substituted or unsubstituted C5-C30 heteroaromatic group; L1 and L2 are respectively and independently phenylene, R3 is any one of a substituted or unsubstituted aromatic group of C6-C30 and a substituted or unsubstituted heteroaromatic group of C5-C30, R4 is any one of hydrogen, deuterium or cyano, the organic electroluminescent material has high thermal weight loss temperature, high thermal stability and long service life of a device, and the high triplet energy level can block energy loss of a luminescent layer, so that the luminescent efficiency of the device is improved, and the proper HOMO energy level can solve the problem of carrier injection, thereby reducing the voltage of the device.

Inventors

QIAN CHAO
XU JUN

Assignees

南京高光半导体材料有限公司

Dates

Publication Date: 20260512
Application Date: 20191128

Claims (3)

1. An organic electroluminescent device is characterized by comprising an anode, a hole injection layer, a hole transport layer, a luminescent layer, an electron transport layer, an electron injection layer and a cathode which are sequentially stacked, wherein the electron transport layer contains an organic electroluminescent material shown as a formula (97) or a formula (297); 。
2. An organic electroluminescent display device comprising the organic electroluminescent device as claimed in claim 1.
3. An organic electroluminescent lighting device, comprising the organic electroluminescent device as claimed in claim 1.

Description

Organic electroluminescent material based on triazine ring structure and organic electroluminescent device The application discloses a division application of a triazine ring structure-based organic electroluminescent material and an organic electroluminescent device, which are applied for application number 2019111862917, application date 2019, 11 and 28. Technical Field The invention relates to the field of organic electroluminescent materials, in particular to an organic electroluminescent material based on a triazine ring structure and an organic electroluminescent device. Background An Organic Light-EMITTING DEVICES (OLED) is an spontaneous Light-emitting device using the principle that a fluorescent substance emits Light by recombination of holes injected from a positive electrode and electrons injected from a negative electrode when an electric field is applied. The self-luminous device has the characteristics of low voltage, high brightness, wide viewing angle, quick response, good temperature adaptability and the like, is ultrathin, can be manufactured on a flexible panel and the like, and is widely applied to the fields of mobile phones, tablet computers, televisions, illumination and the like. The organic electroluminescent device is like a sandwich structure, and comprises electrode material film layers and organic functional materials clamped between different electrode film layers or referred to, wherein various functional materials are mutually overlapped together according to purposes to form the organic electroluminescent device. When voltage is applied to two end electrodes of the organic electroluminescent device as a current device, positive and negative charges are generated in the organic layer functional material film layer through the action of an electric field, the positive and negative charges are further compounded in the luminescent layer to generate light, and the process is electroluminescence. The research on improving the performance of the organic electroluminescent device comprises the steps of reducing the driving voltage of the device, improving the luminous efficiency of the device, prolonging the service life of the device and the like. In order to realize the continuous improvement of the performance of the organic electroluminescent device, not only the innovation of the structure and the manufacturing process of the organic electroluminescent device, but also the continuous research and innovation of the organic electro-optic functional material are needed, and the organic electro-optic functional material with higher performance is created. In view of the actual demands of the current organic electroluminescent industry, the development of the current organic electroluminescent materials is far from sufficient, and falls behind the requirements of panel manufacturing enterprises. Disclosure of Invention Aiming at the technical problems, the invention provides an organic electroluminescent material based on a triazine ring structure and an organic electroluminescent device. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: an organic electroluminescent material based on triazine ring structure, the structural formula of which is shown as the following formula (1): Wherein R1 and R2 are each independently a substituted or unsubstituted C3-C6 cycloalkyl group, a substituted or unsubstituted C6-C30 aromatic group, or a substituted or unsubstituted C5-C30 heteroaromatic group; L1 and L2 are each independently phenylene; r3 is any one of a substituted or unsubstituted C6-C30 aromatic group and a substituted or unsubstituted C5-C30 heteroaromatic group; R4 is any one of hydrogen, deuterium or cyano; m and n are each independently 0 or 1. Further, R1 and R2 are each independently cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, biphenyl, terphenyl, naphthyl, anthryl, phenanthryl, fluorenyl, dibenzoyl, 9-dimethylfluorenyl, 9' -spirobifluorene, 9-diphenylfluorenyl, dibenzofuranyl, carbazolyl, benzocarbazolyl and N-phenylcarbazolyl; The cyclopropyl, cyclobutyl, cyclopentyl, cyclohexyl, phenyl, biphenyl, terphenyl, naphthyl, anthryl, phenanthryl, fluorenyl, dibenzofuranyl, 9-dimethylfluorenyl, 9' -spirobifluorene, 9-diphenylfluorenyl, dibenzofluorenyl, carbazolyl, benzocarbazolyl and N-phenylcarbazolyl are unsubstituted or are obtained by substituting deuterium, C1-C4 alkyl or benzene for at least one hydrogen. Preferably, R1 and R2 are each independently cyclohexane, phenyl, biphenyl, naphthyl, phenanthryl, dibenzoyl, 9' -spirobifluorene, carbazolyl, N-phenylcarbazolyl, deuterium-substituted phenyl, tert-butyl-substituted phenyl, isopropyl-substituted phenyl, phenyl-substituted dibenzoyl. Preferably, R1 and R2 each preferably contain one dibenzoyl group. Further, R3 is any one of a substituted or unsubstituted naphthyl group, a substituted or unsubstituted anthryl group, a substituted or unsubstituted phenanthryl grou