Indole derivative and application thereof to organic electroluminescence

Abstract

The invention relates to a compound shown as formula (I). R1 is selected from C1-20 aliphatic straight chain or branched chain alkyl or C6-30 aryl radical; R2 is selected from C4-40 substituted or unsubstituted aromatic amino, carbazolyl, dibenzothienyl, indolyl or dibenzofuryl; L is selected from the single bond, C4-40 substituted aromatic amine, C4-40 substituted carbazole, C4-40 substituted indole, C4-40 substituted dibenzofuran, C4-40 substituted dibenzothiophene, substituted or unsubstituted diphenyl ether, O, N or S; R3-R6 is independently selected from H atom, C1-20 of aliphatic straight chain or branched chain alkyl or C6-30 aromatic groups, or a ring formed by connecting two adjacent groups; and n is selected from an integer of 2-5. The invention also protects the application of the compound in organic light emitting devices, especially as a hole transport / injection material in OLED devices.

Description

Technical field

[0001] The invention relates to an organic compound, in particular to an indole derivative used in an organic electroluminescence device and its application in the field of organic electroluminescence display technology. Background technique

[0002] At present, the hole injection and transport materials used in organic electroluminescent devices are generally triarylamine derivatives (for example, Idemitsu Patent: Publication No. CN1152607C, Publication Date 2004, 6, 2). Its general structural characteristics are: The injection material has at least three triarylamine structural units in a molecule, and two Ns are separated by a benzene ring, such as structural formula 1. As a transport material, the triarylamine structural unit in a molecule is generally Two, and two N are separated by biphenyl. In this type of material, the typical example is NPB.

[0003]

[0004] In recent years, there have been some new developments in the research of this type of material. I...

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