| 摘要 |
PURPOSE:To enhance durability by incorporating a specified biphenyl compound in a photosensitive layer. CONSTITUTION:The photosensitive layer formed on a conductive substrate contains one of the biphenyl compounds represented by formula I, thus permitting potential stability at the time of repeated uses to be enhanced and a remarkable effect on resistance to memory phenomenon remaining after pause to be exhibited, and superior durability to be obtained. In formula I, R<1> is optionally substituted small alkyl, such as methyl, ethyl, propyl, and butyl; R<2> is optionally substituted aralkyl, such as benzyl, phenetyl, naphthylmethyl, and anthrylmethyl; each of R<3> and R<4> is optionally substituted aryl, such as phenyl, naphthyl, and anthryl, optionally same as or different from each other; and each of Ar and Ar' is optionally substituted arylene, such as a divalent benzene, naphthalene, and anthracene ring group, optionally same or different. |
