Novel compound and application thereof in organic electroluminescent display device

Abstract

The invention discloses a novel compound and application thereof in an organic electroluminescent display device. The chemical structure of the compound is as shown in the specification, X is selected from C, O, S or N, and Cy is naphthenic base with 5-30 carbon atoms; R(a) and R(b) respectively represent a and b independent R substituents; R is hydrogen, deuterium, substituted or unsubstituted alkyl or alkoxy with the carbon atom number of 1-20, substituted or unsubstituted aryl with the ring-forming carbon atom number of 5-60, substituted or unsubstituted heteroaryl with the ring-forming carbon atom number of 5-60, substituted or unsubstituted fluoroalkyl with the carbon atom number of 1-20, or cyano; and Ar1 to Ar3 are respectively and independently substituted or unsubstituted arylene with the ring-forming carbon atom number of 5-60 and substituted or unsubstituted heteroarylene with the ring-forming carbon atom number of 5-60. The novel compound is good in film-forming property, crystallinity resistance and molecular stability when being used as a hole transport layer material, and the service life of a device is greatly prolonged.

Description

technical field [0001] The invention belongs to the field of organic electroluminescent materials, and specifically relates to novel compounds and their application in organic electroluminescent display devices. Background technique [0002] At present, the hole transport materials of organic electroluminescent display devices (OLED) require good hole mobility and energy levels for compound molecules, excellent film formation and molecular stability, among which 9,9 diphenylfluorene is in Hole-transport materials for OLEDs are widely used and exhibit good hole-transport capabilities, but crystallization may occur, resulting in reduced device lifetime. Contents of the invention [0003] The main purpose of the present invention is to provide a novel cycloalkyl substituted compound, in which an amino group and a cycloalkyl group are connected to the phenyl group of 9,9 diphenylfluorene at the same time. This structure makes the compound as a whole have an excellent compositi...

AI Technical Summary

Problems solved by technology

[0002] At present, the hole transport materials of organic electroluminescent display devices (OLED) require good hole mobility and energy levels for compound molecules, excellent film formation and molecular stability, among which 9,9 diphenylfluorene is in It is widely used in the hole transport material of OLED, which shows good hole transport ability, but crystallization phenomenon may occur, which will reduce the lifetime of the device

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