ELECTROPHOTOGRAPHIC CHARACTERISTICS OF PURE AND SENSITIZED POLY(N-VINYL CARBAZOLE)

The electrophotographic characteristics of poly(N-vinyl carbazole) (PVK) are studied with reference to its purification and sensitization. PVK obtained after 12 cycles of purificiation gives best results. Photosensitivity of PVK is found to increase by doping with 2, 4, 7-trinitro-9-fluorenone (TNF). Further improvements in the electrophotographic characteristics are achieved by forming a double layer structure consisting of a thin PVK:TNF layer coated over a relatively thicker PVK layer. © 1979.