Organic photoreceptors may be overcoated for many reasons among which are the desire to impart wear and scratch resistance, to protect the surface from corona generated chemicals, and to improve the efficiency of electrophotographic process steps, such as toner transfer and cleaning. In this paper we will discuss the use of silsesquioxanes prepared by the sol-gel process as photoreceptor overcoats. Included in our discussion will be the chemistry and procedures involved in overcoat fabrication, the physical and electrophotographic characterization of overcoated photoreceptors, and the effects of chemical structural variations on these characteristics.