A method for the preparation of electrophotographic photosensitive materials

摘要

1,148,487. Cadmium sulphide. FUJI SHASHIN FILM K.K. 8 June, 1966 [11 June, 1965], No. 25605/66. Heading C1A. [Also in Division H1] A photo-conductive material is made by heating CdS of size 1À5 Á the major proportion of which has a cubic crystalline structure, to 100-550‹ C. for up to 48 hrs., thereby producing a major portion of sulphide having a hexagonal structure. The sulphide is preferably produced by passage of H 2 S through an aqueous solution containing a cadmium salt which give cubic CdS. It may be heated in air, nitrogen, vacuum or sulphur vapour, and may be doped with copper chloride.