Electrophotographic photoconductor comprising CdS and ZnS

Details Electrophotographic photoconductor comprising CdS and ZnS Electrophotographic photoconductor comprising CdS and ZnS

1981-02-23

1982-07-27

Welsh, John D.

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 58, 430 59, 430 60, 430 95, 430 88, 430 89, 430 90, 430 94, G03G 5082

Patent

active

043418511

ABSTRACT:
An electrophotographic photoconductor, formed on a conductive substrate by spray pyrolysis, comprising essentially a major amount of cadmium sulphide and a minor amount of zinc sulphide. The cadmium layer is at least three microns in thickness and is formed in three zones. The zone adjacent the metal substrate, adapted to form a contact layer, bears an amount of lead sulphide; the outermost zone, adapted to absorb light, is doped with a minor amount of copper to eliminate fatigue; and the intermediate zone, which is necessary to increase the surface potential, is adapted to transport light-generated charge and is doped with a minor amount of chlorine. The process is carried on in the atmosphere with three different aqueous solutions of reagents to form the three different zones. The photoconductive layer is microcrystalline in structure and bears adsorbed oxygen.

REFERENCES:
patent: 3676210 (1972-07-01), Shattuck et al.

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