| 摘要 |
PURPOSE:To obtain good sensitivity over a wide wavelength range including the emission wavelength region of a semiconductor laser by using tau-type and/or eta- type metal-free phthalocyanine as an electrostatic charge generating material and a specified compd. as a charge transfer material. CONSTITUTION:A layer contg. a charge generatng material and a layer contg. a charge transfer material are formed on a conductive substrate to obtain a composite type electrophotographic sensitive body. As the charge generating material, metal-free phthalocyanine of a type selected from tau-type, tau'-type, eta-type, and eta'-type is used, and as the charge transfer material, compds. represented by the formula, are used, in which R1, R2 are each alkyl, aralkyl, or aryl, and X is an aromatic heterocyclic group. Such a composite type photosensitive body is obtained, e.g., by forming a layer contg. the charge generating material on a conductive substrate and on this layer a layer contg. the charge transfer material or it may have a reverse constitution, or both materials may be contained in one layer. The use of a combination of such a charge generating and charge transfer materials enhances sensitivity even in a long wavelength region, and the obtained photosensitive body is especially suitable for a semiconductor laser printer using a semiconductor laser as a light source. |
