Occurrence of Polarized Space Charge in Vapor Deposited Selenium Layers During Electrophotographic Processes

Abstract

Persistent polarization due to polarized space charge in a selenium layer has been measured in combina-ation with corona charge and in relation to depositing condition. As the result, it has been found that intense persistent polarization can appear in the layer which depends upon vapor depositing and charging conditions. Furthermore, from measurements of the magnitude, dark depolarization, and photo-depolarization, some important results have been obtained on distribution of space charges, carrier injection, and carrier ejection in relation to the depositing condition. A process for latent image formation as well as for another observation of the persistent polarization without using the electrode is presented and analyzed. This analysis predicts the formation of an attractive latent image. A comparison between the analysis and an experiment has been made on selenium layers.