| 摘要 |
PURPOSE:To obtain high sensitivity and low residual potential and to prevent deterioration of characteristics even at the time of repeated uses by using a specified carbazole derivative as an electric charge transfer material. CONSTITUTION:The carbazole derivative to be used as the charge generating material is represented by formula I in which R is vinylene, phenylene, or the like; each of X1-X8 is H, halogen, or 1-4C alkyl, optionally same or different. The charge transfer layer 4 is obtained by dissolving this carbazole derivative in a solvent together with a binder resin, coating a charge generating layer formed in advance, and drying it, thus permitting high transfer efficiency of charge carriers generated in a photosensitive layer, high sensitivity, and low residual potential, and superior successive use stability to be all ensured, without deterioration due to ozone and light exposure. |
