| 摘要 |
An electrophotographic element comprising an electrically conductive substrate, a charge carrier generating layer and a charge transfer layer superimposed on said substrate, wherein said charge carrier generating layer contains a trisazo compound having the general formula (I): <IMAGE> (I) (wherein, Ar1 represents a substituted or unsubstituted phenyl radical and said charge transfer layer contains a hydrazone compound having the general formula (II), (III), (IV), or (V): <IMAGE> (II) (wherein, R1 represents a methyl group, an ethyl group, a 2-hydroxyethyl group or a 2-chloroethyl group, R2 represents a methyl group, an ethyl group, a benzyl group or a phenyl group, and R3 represents hydrogen, chlorine, an alkyl group having 1 to 4 carbon atoms, an alkoxyl group having 1 to 4 carbon atoms, a dialkylamino group or a nitro group.), <IMAGE> (III) (wherein, Ar2 represents a naphthalene ring, an anthracene ring, a styryl group and their substituents, or a pyridine ring, a furan ring or a thiophene ring, and R4 represents an alkyl group or a benzyl group.), <IMAGE> (IV) (wherein, R5, R6, R7 and R8 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a dialkyl group or a dibenzylamino group, and R9 represents an alkyl group or a benzyl group.), <IMAGE> (V) (wherein, R10, R11, R12 and R13 each represents hydrogen, an alkyl group having 1 to 3 carbon atoms, an alkoxyl group having 1 to 3 carbon atoms, a substituted or non-substituted dialkylamino group, a dibenzylamino group or a halogen atom.), and a binder.
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