Electrophotographic photoreceptor containing naphthalenetetracarboxylic acid diimide derivatives and electrophotographic imaging apparatus employing the same

摘要

An electrophotographic photoreceptor containing a naphthalenetetracarboxylic acid diimide derivative of Formula (1), which has a branched alkyl group substituted with an aryl group at the alpha-position with regard to nitrogen atoms of imide groups: wherein R₁ and R₂ are independently selected from the group consisting of a hydrogen atom, a halogen atom, a C₁-C₂₀ substituted or unsubstituted alkyl group, and a C₁-C₂₀ substituted or unsubstituted alkoxy group; R₃ is selected from the group consisting of a C₁-C₂₀ substituted or unsubstituted alkyl group, a C₁-C₂₀ substituted or unsubstituted alkoxy group, a C₇-C₃₀ substituted or unsubstituted aralkyl group, and a group having the formula -(CH₂)_n-Y-R₄; Ar is a C₆-C₃₀ substituted or unsubstituted aryl group; Y is an oxygen or sulfur atom; R₄ is a hydrogen atom or a C₁-C₂₀ substituted or unsubstituted alkyl group; and n is an integer between 1 and 12. The naphthalenetetracarboxylic acid diimide derivative has high solubility in organic solvents and compatibility with binder resins, thus providing better electron transporting ability. The invention is also directed to an electrophotographic imaging apparatus using the photoreceptor.