CHARGE-TRANSPORTING VARNISH

摘要

A charge-transporting varnish including charge-transporting material comprising N,N′-diaryl benzidine derivatives represented by formula (1), a charge-accepting dopant comprising heteropoly acid, and an organic solvent.;;[In the formula, R1 to R8 independently represent hydrogen, a halogen, an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms or an alkynyl having 2 to 20 carbon atoms; and Ar1 and Ar2 independently represent groups represented by formulas (2) or (3).;;(In the formula, R9 to R18 independently represent hydrogen, a halogen, an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms or an alkynyl having 2 to 20 carbon atoms; and X1 and X2 independently represent hydrogen, a halogen, an alkyl having 1 to 20 carbon atoms, an alkenyl having 2 to 20 carbon atoms, an alkynyl having 2 to 20 carbon atoms, diphenylamino, 1-naphthylphenylamino, 2-naphthylphenylamino, di(1-naphthyl)-amino, and di(2-naphthyl)-amino or 1-naphthyl-2-naphtylamino.)]

主权项

1. A charge-transporting varnish comprising a charge-transporting material composed of an N,N′-diarylbenzidine derivative of formula (1), a charge-accepting dopant composed of a heteropolyacid, and an organic solvent: wherein R1 to R8 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 20 carbons, an alkenyl group of 2 to 20 carbons or an alkynyl group of 2 to 20 carbons; and Ar1 and Ar2 are each independently a group of formula (2) or (3): wherein R9 to R18 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 20 carbons, an alkenyl group of 2 to 20 carbons or an alkynyl group of 2 to 20 carbons; and X1 and X2 are each independently a hydrogen atom, a halogen atom, an alkyl group of 1 to 20 carbons, an alkenyl group of 2 to 20 carbons, an alkynyl group of 1 to 20 carbons, a diphenylamino group, a 1-naphthylphenylamino group, a 2-naphthylphenylamino group, a di(1-naphthyl)amino group, a di(2-naphthyl)amino group or a 1-naphthyl-2-naphthylamino group.