POSITIVE CHARGING VANADYL PHTHALOCYANINE SENSITIZED PHOTORECEPTOR WITH ENHANCED SENSITIVITY AND CYCLING STABILITY
Original Publication Date: 1987-Apr-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
Multi le layered electrophotographic imaging members are well known in the art. 8ne specific example of a multiple layered photoreceptor comprises an aluminum ground plane, a transport layer comprising diamine charge transport molecules dispersed in a polycarbonate binder, a charge generation layer comprising vanadyl phthalocyanine particles dispersed in a polyester binder and a protective overcoating comprising vacuum deposited arsenic selenium alloy. This photoreceptor exhibits cycle up in initial charge acceptance, cycle up in rested charge acceptance after cycling, and a change in the photo-induced-discharge-curve shape as a function of cycling. It has been found that the replacement of the polyester resin in the charge generation layer with a polystyrene resin such as Monsanto Lustrex HF777 provides electrophotographic imaging members with substantially increased sensitivity and cycling stability. The charge transport layer and charge generation layer may be formed by spray deposition.