Patent ID: 7201859

Claim:
A hole transport layer of an organic EL display, comprising: one of a mixture of a poly (3,4)-ethylenedioxythiophene (PEDOT) and a polystyrenesulfonate, a mixture of a polyaniline (PANI) and a polystyrenesulfonate, and an aromatic amine derivative; and an organic compound derivative having a structure with the following formula: R 1 R 2 MR 3 R 4 wherein “M” denotes a metal selected from the group consisting of Ti, Pt, and metals belonging to groups 3A and 4A of periods 3 to 5, and “R 1 ” to “R 4 ” each denotes a functional group selected from the group consisting of a hydroxyl group, a hydrogen, a cyano group, a nitro group, an aryl group ranging from 6 to about 15 carbons, a fused aromatic group having a ring, an aromatic halide group, an alkylamine group, an aryloxy group, an arylamine group, an alkylepoxide group, a vinyl group, an alkylmercapto group, and an imide group.