Electrophotographic photoreceptor, process cartridge, and image forming apparatus

Abstract

An electrophotographic photoreceptor includes a conductive substrate; an undercoat layer that is disposed on the conductive substrate and contains a binder resin and an electron transport material represented by a general formula (P) below; and a photosensitive layer that is disposed on the undercoat layer and contains at least one resin of a polyarylate resin containing a dicarboxylic unit represented by a formula (A) below and a diol unit represented by a formula (B) below and a polycarbonate resin containing a biphenyl-containing constitutional unit represented by a formula (BP) below in an amount of more than 15 mol % relative to all constitutional units, in which in the general formula (P), R1, R2, R3, R4, R5, R6, R7, and R8 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, an aralkyl group, an aryl group, an alkoxycarbonyl group, or a halogen atom, in the formula (A), ArA1 and ArA2 are each independently an aromatic ring that may have a substituent, LA is a single bond or a divalent linking group, nA1 is 0, 1, or 2, in the formula (B), ArB1 and ArB2 are each independently an aromatic ring that may have a substituent, LB is a single bond, an oxygen atom, a sulfur atom, or —C(Rb1)(Rb2)—, nB1 is 0, 1, or 2, Rb1 and Rb2 are each independently a hydrogen atom, an alkyl group having 1 or more and 20 or less carbon atoms, an aryl group having 6 or more and 12 or less carbon atoms, or an aralkyl group having 7 or more and 20 or less carbon atoms, Rb1 and Rb2 may be bonded together to form a cyclic alkyl group, in the formula (BP), j is an integer of 0 or more and 4 or less, j R1's are each independently a methyl group or an ethyl group, k is an integer of 0 or more and 4 or less, and k R2's are each independently a methyl group or an ethyl group.

Dependencies are inferred from the claim text.