2018 Volume 57 Issue 5 Pages 569-575
Recently the negative-charging-type multi-layered organic photoreceptor makes up most of the photoreceptor which is an important device of an electrophotography process. On the other hand, two kinds of positive-charging-type photoreceptor have been used by KYOCERA Document solutions. One is a positive-charging-type single-layer organic photoreceptor, and the other is an amorphous silicon photoreceptor. The former is used by our machine model widely from a low-end printer to A3 MFP (Multifunctional Products) due to environment, high-resolution and low-cost. Because each process of carrier generation, carrier injection and carrier transport are proceed at the same time in the photoreceptor, the photo-induced decay phenomena undergoes influence of the several interactions between the constituent materials, the inner electric field distribution by a space charge and recombination. Therefore it is necessary for photoreceptor development to consider these interactions. In this report, history, operation principle and technological issue of positive-charging-type photoreceptor are outlined.
