| 摘要 |
PURPOSE:To obtain superior electrifiability, low residual potential and high sensitivity by forming a photosensitive layer containing a specified squarylium compound on a conductive substrate. CONSTITUTION:The photosensitive layer formed on the conductive substrate contains at least one of the squarylium compounds represented by formula I in which R1 is 1-20C alkyl or phenyl; R2 is H, OH, CH3, COOH, halogen, trifluoromethyl, alkylated or phenylated carbonamide or such sulfonamide; each of X1 and X2 is a group of formula II and III; and Z is an atomic group necessary to form a ring; and each of R2 and R3 is a benzyl group substituted by a specified group, thus permitting potential acceptance and sensitivity to be enhanced and residual potential to be lowered. |
