HIGHLY EFFICIENT ORGANIC LIGHT EMITTING MATERIAL WITH THERMAL STABILITY USED AS A HOLE TRANSPORT MATERIAL OF ORGANIC LIGHT EMITTING DIODES AND A PREPARATION METHOD THEREOF

摘要

PURPOSE: A hexaphenyl benzene derivative is provided to high thermal stability and high glass transition temperature and to improve light-emitting efficiency of an organic light-emitting diode.;CONSTITUTION: A hexaphenyl benzene derivative is represented by chemical formula 1. In chemical formula 1, Ar1-Ar4 may be the same or different and represent an aryl group substituted or unsubstituted with C1~C20 alkyl group, an aryl group substituted or unsubstituted with C1~C30 alkyl group containing at least one heteroatom, or an aryl group substituted or unsubstituted with C3~C30 heterocycle containing at least one heteroatom, wherein adjacent two or more of Ar1-Ar4 may form a ring; m and n are an integer of 0-4, wherein m has to an integer of 0-4, and m+n is 1~8.;COPYRIGHT KIPO 2011