Printing member for electrostatic photocopying

Claim 1

A printing member for electrostatic photocopying comprising: a substrate having a conductive surface; a photoelectrically-sensitive, electrically chargeable layer on the conductive surface of the substrate; wherein the photoelectrically-sensitive, electrically chargeable layer has a photoelectrically-sensitive non-single crystal semiconductor layer on the substrate, a charge storing non-single crystal semiconductor layer on the photoelectrically-sensitive non-single crystal semiconductor layer and a chargeable layer formed on the charge storing non-single crystal semiconductor layer and permeable to light and electrical carriers and wherein the charge storing non-single crystal semiconductor layer has a smaller energy band gap than the chargeable layer and the region of the photoelectrically-sensitive non-single crystal semicondutor layer on the side of the charge storing non-single crystal semiconductor layer; wherein the non-single crystal semiconductor layer has a first layer on the substrate and a second layer on the first layer to create a transition region; wherein each of said first, second, and charge storing layers is formed principally from material selected from the group consisting of Si, Si 3 N 4-x (0<x<4), SiC 1-x (0<x<1), or SiO 2-x (0<x<2) and contains material selected from the group consisting of hydrogen, chlorine, or fluorine; and wherein the first layer is P or N type and the second layer is I type, and the transition region is PI of NI depending on whether the first region is P or N type.