Multi-layered electrophotographic element having a mixture of perylene pigments

A multi-layered electrophotographic element comprising an electrically conductive substrate, and a photoconductive layer on a surface thereof comprising a charge generating layer comprising a mixture of charge generating perylene pigments of the following structures:

• ##STR18## wherein R=aryl, alkyl, aralkyl, alkaryl, naphtyl, alkoxyaryl or a heterocyclic group and their substituted derivatives, and ##STR19## wherein X=a phenylene, naphtylene, pyridylene or phenantrene group and the corresponding alkyl, aryl, aralkyl, nitro, chloro, bromo and methoxy substituted derivatives of these groups,
• wherein said mixture of perylene pigments is selected from the group consisting of a pigment mixture of perylenes of structure 1 with perylenes of structure 2, a pigment mixture of perylenes of structure 1 and a pigment mixture of perylenes of structure 2, and a charge transport layer containing as a charge transporting agent, homogeneously distributed in an insulating binder, an azine which has the general structural formula ##STR20## wherein R.sub.5 and R.sub.10 each represents a hydrogen atom or an alkyl group having from 1 to 4 carbon atoms and R.sub.5 to R.sub.10 can be the same or different.

An electrophotographic imaging method comprising, providing a multi-layered electrophotographic imaging element comprising an electrically conductive substrate, and a photoconductive layer on a surface of said substrate comprising a mixture of charge generating perylene pigments of the following structures ##STR25## wherein said mixture of perylene pigments is selected from the group consisting of a pigment mixture of perylenes of structure 1 with perylenes of structure 2, a pigment mixture of perylenes of structure 1 and a pigment mixture of perylenes of structure 2,

• applying a uniform electrostatic charge to said photoconductive layer,
• selectively exposing said uniformly charged photoconductive layer to light so as to form an electrostatic latent image thereon, and
• developing said electrostatic latent image with electroscopic toner particles to render said latent image visible.