Electrophotoconductive Cd S Se materials with Cu and Cl

Details Electrophotoconductive Cd S Se materials with Cu and Cl Electrophotoconductive Cd S Se materials with Cu and Cl

1979-03-05

1980-12-16

Martin, Jr., Roland E.

Radiation imagery chemistry: process, composition, or product th

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

Radiation-sensitive composition or product

430 94, 430 95, 2525011, 423508, 423518, G03G 508

Patent

active

042398444

ABSTRACT:
An electrophotoconductive material having the molecular formula:
Cd(S.sub.x Se.sub.1-x):yCu.zCl is improved by controlling x in the range of from about 0.95 to about 0.98, y from about 0.0001 to about 0.001 and z is from about 0.001 to about 0.0015. The materials also have a relatively narrow particle size distribution and a relatively fine particle size and the surfaces relatively free of p-type copper sulfide. The improved materials exhibit and maintain a large differential between the image voltage and the background voltage of in excess of 800 volts when the material is used as an electrophotoconductive layer in a photosensitive member of equipment used in electrophotograhic copying processes. The photosensitive member consisting essentially of a conductive base, and electrophotoconductive layer of from about 40 to 60 micrometers overlaying the base consisting of the foregoing electrophotoconductive material and an insulating layer of from about 20 to 40 micrometers overlaying the electrophotoconductive layer exhibits improved contrast properties and a longer life than prior art members when used in an electrophotographic reproduction process.

REFERENCES:
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patent: 3948656 (1976-04-01), Maxwell
patent: 3975306 (1976-08-01), Jones et al.
Yamanaka et al., "Photoconductive Properties of Cd(S.sub.x Se.sub.1-y) Crystals," Qyo Buturi, 1963, pp. 98-102.

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