CHEMICALLY STABILIZED SELENIUM ALLOY PHOTORECEPTOR
Original Publication Date: 1987-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
It has been found that selenium alloy photoreceptors used in electrostatographic imaging apparatus employing liquid developers are subject to attack by chemicals in the liquid developer. For' example, in photoreceptors comprising a relatively thick transport base layer and a relatively thin top photogeneration layer, the photogeneration layer tends to erode and form pits when developed with liquid developers. A selenium-tellurium alloy was selected for the photogeneration layer because of its panchromaticity and the base transport layer was prepared from an arsenic-chlorine-selenium alloy optimized to provide excellent transport properties and cyclic stability. Due to the separation of the photogeneration and transport functions, it is generally deemed unnecessary to have chlorine in the thin photogeneration layer and unnecessary and more costly to incorporate tellurium into the base layer. Surprisingly, it has been found that the addition of a small amount of chlorine to the top photogeneration layer, in the order of about 10 parts per million to about 100 parts per million, stabilizes the surface of the photoreceptor against erosion and pitting caused by liquid developers.