| 摘要 |
PROBLEM TO BE SOLVED: To provide the electrophotographic photoreceptor high in sensitivity in a long wavelength region and high in durability and adapted for laser printers and the like using semiconductor laser beams. SOLUTION: A photosensitive layer formed on a conductive substrate contains as a charge generating material, a crystalline oxotitanyl phthalocyanine having main peaks of 7.3 deg., 9.4 deg., 9,7 deg., 11.6 deg., 13.3 deg., 17.9 deg., 24.1 deg., and 27.2 deg. in the X-ray diffraction spectra, and maximum double bundle peaks in 9.4 deg. and 9.7 deg., and the second maximum peak in 27.2 deg., and a charge transfer material of benzofuran-biscyclic hydrazone compound represented by the formula in which Y is a heterocyclic group optionally substituted or condensed with another ring together with N atom; (a) is an optionally substituted 1-3C alkyl or 1-3C fluoroalkyl or 1-3C alkoxy or 1-3C dialkylamino group or an H or halogen atom; and (n) is 1 or 2 or 3.
|
