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ELECTROPHOTOCHEMICAL PREPARATION OF SELENIUM PHOTOCONDUCTIVE MEMBERS

IP.com Disclosure Number: IPCOM000023488D
Original Publication Date: 1977-Dec-31
Included in the Prior Art Database: 2004-Mar-31

Publishing Venue

Xerox Disclosure Journal

Abstract

A method for forming an electrophotographic imaging member wherein amorphous selenium is cathodically deposited on a conducting substrate from a selenious acid electrolyte while the substrate is simultaneously illuminated with a periodic spatially modulated pattern of electromagnetic radiation with-in the absorption band of selenium, In operation the sub-strate is arranged as the cathode in an electrodeposition cell filled with the electrolyte and a constant current supplied by a D.C. energy source is passed through the electrolyte while the substrate is illuminated as described, The selenium layer thus formed on the substrate has a periodically varying thick-ness which corresponds to the periodic spatially modulated pattern of radiation, Any suitable conductive substrate may be employed; preferably the substrate is one that forms a blocking contact with selenium, e.g., gold or nickel. Either surface of the substrate may be illuminated depending upon, of course, the characteristics of the substrate. Where the sub-strate is substantially transparent, it is preferred to illuminate the substrate from the rear. Where the substrate is opaque, the illumination must be directed upon the sub-