Layered charge generator/transport electrophotographic photoconductor uses bisazo pigment

Claim 1

In a layered electrophotographic photoconductor comprising an electroconductive support material and a photoconductive double layer which consists of a charge generation layer and a charge transport layer, the improvement wherein: a. said charge generation layer comprises a charge generating material selected from the group consisting of bisazo pigments represented by formula (1) ##STR12## wherein A represents--C 6 H 4 --Cl(o), --C 6 H 4 --Cl(m), --C 6 H 4 --Br(o), --C 6 H 4 --Br(m), --C 6 H 4 --F(o), --C 6 H 4 --F(m), --C 6 H 4 --F(p), or --C 6 H 4 --I(m); and b. said charge transport layer comprises a charge transporting material selected from the group consisting of the anthracene compounds represented by formula (2) and distyrylbenzene compounds represented by formula (3) ##STR13## wherein R 1 represents hydrogen or halogen; and R 2 represents a substituted or unsubstituted phenyl group, a naphthyl group, an anthryl group or a carbazole group, ##STR14## wherein R 3 represents a carbazoyl group, a pyridyl group, a thienyl group, an indolyl group, a furyl group, a phenyl group, a styryl group, a naphthyl group, an anthryl group, which phenyl group, styryl group, naphthyl group and anthryl group are unsubstituted or substituted with one member selected from the group consisting of a dialkylamino group, an alkyl group, an alkoxy group, a carboxyl group or an esterified carboxyl group, halogen, a cyano group, an aralkylamino group, an amino group, a hydroxy group, a nitro group and an acetylamino group.