PHOTOSENSITIVE CHARGE STORAGE ELECTRODE HAVING A SELECTIVELY CONDUCTING PROTECTIVE LAYER OF MATCHING VALENCE BAND ON ITS SURFACE

摘要

A photosensitive charge storage electrode comprises a photoconductive substrate having a bulk region with a surface region of reduced conductivity. On the surface region is a selectively insulating layer of a composition such that the top of the valence band of the layer is essentially at the same energy level as the top of the valence band in the bulk region of the photoconductive substrate.