| 摘要 |
PURPOSE:To ensure an electrophotographic characteristics good in both positive and negative triboelectrifiability by forming on a conductive layer a photosensitive layer contg. an electrostatic charge generating material of at least one of gamma, gamma', eta, and eta' type metal-free phthalocyanines, and a charge transfer material. CONSTITUTION:As the charge generating material, at least one of gamma, gamma', eta, and eta' type metal-free phthalocyanines is used and as the charge transfer material, a dielectric body of a polymer, such as polyvinylpyrene, or a low mol.wt. compd., such as fluorene, is used. As a binder, insulating resins having film-forming property in a normal state, and resins capable of being hardened with heat and/ or light and forming a film are used. The photosensitive layer is formed by mixing said charge generating material, said charge transfer material, said binder, additives, such as a dispersing aid and a plasticizer, with a solvent, such as ketones and ethers, dissolving them, coating the conductive layer, and drying them. As a result, an electrophotographic sensitive body triboelectrifiable to both positive and negative polarities can be obtained by forming a single photosensitive layer on the conductive layer. |
