IMAGING SYSTEM CONTAINING TRIGONAL SELENIUM AND A GROUP IA HYDROXIDE, CARBONATE, BICARBONATE, ACETATE OR SELENITE

An imaging member having a layer of particulate photoconductive material which may be dispersed in an organic resinous binder either randomly or geometrically is disclosed. This photoconductive layer may also be used as a photogenerating layer in a composite photoconductive member which contains at least two electrically operative layers one of which is a charge carrier photogenerating layer and the other being a charge carrier transport layer. The photogenerating layer may also be used with an overlayer and underlayer of charge carrier transport material. The particulate photoconductive material consists essentially of trigonal selenium doped with from about 0 01 to about 12.0% by weight based on the weight of the trigonal selenium of a material selected from the group consisting of sodium, lithium, potassium, rubidium and cesium.