Layered organic electrophotographic photoconductor element comprising bisazo generating and hydrazone transport layers

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 of the formula ##STR10## wherein A represents --C.sub.6 H.sub.4 --Cl(o), --C.sub.6 H.sub.4 --Cl(m), --C.sub.6 H.sub.4 --Br(o), --C.sub.6 H.sub.4 --Br(m), --C.sub.6 H.sub.4 --F(o), --C.sub.6 H.sub.4 --F(m), --C.sub.6 H.sub.4 --F(p), or --C.sub.6 H.sub.4 --I(m);
• and
• b. said charge transport layer comprises a charge transporting material selected from the group consisting of the hydrazone compounds of the formula ##STR11## wherein R.sup.1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group;
• R.sup.2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group;
• and R.sup.3 represents hydrogen, chloride, bromide, an alkyl group with one to four carbon atoms, an alkoxy group with one to four carbon atoms, a dialkylamino group, or a nitro group.