Electrophotographic photosensitive member, process cartridge, and image forming apparatus

An electrophotographic photosensitive member comprising:

• a conductive substrate;
• and
• a photosensitive layer, wherein
• the photosensitive layer is a single layer,
• the photosensitive layer contains a charge generating material, a binder resin, a first electron transport material, a second electron transport material, and a hole transport material,
• the binder resin includes a polyarylate resin,
• the polyarylate resin includes repeating units represented by formula (1), (2), (3), and (4),
• the repeating unit represented by the formula (3) has a percentage content of greater than 0% and less than 50% to a total number of repeats of the repeating units represented by the formulas (1) and (3),
• the repeating unit represented by the formula (4) has a percentage content of at least 35% and less than 70% to a total number of repeats of the repeating units represented by the formulas (2) and (4),
• the first electron transport material includes a compound represented by formula (A15) or (A16), and
• the second electron transport material includes a compound represented by formua (B10), (B11), (B12), (B13), or (B14):
• where in the formula (1),
• R1 and R2 each represent a methyl group and X represents a divalent group represented by formula (X1), or
• R1 and R2 each represent a hydrogen atom and X represents a divalent group represented by formula (X2),
• in the formulas (X1) and (X2), * represents a bond,
• Q61 and Q62 in the formula (A15), Q51, Q52, Q53, Q54, Q55, and Q56 in the formula (A16), Q1 and Q2 in the formula (B10), Q11, Q12, and Q13 in the formula (B11), Q21, Q22, Q23, and Q24 in the formula (B12), Q31 and Q32 in the formula (B13), and Q41, Q42, Q43, and Q44 in the formula (B14) each represent, independently of one another, a hydrogen atom, a halogen atom, a cyano group, an alkyl group with a carbon number of at least 1 and no greater than 6, an alkenyl group with a carbon number of at least 2 and no greater than 6, an alkoxy group with a carbon number of at least 1 and no greater than 6, or an aryl group with a carbon number of at least 6 and no greater than 14 optionally substituted with at least one substituent selected from the group consisting of a halogen atom and an alkyl group with a carbon number of at least 1 and no greater than 6, and
• in the formula (A16), Y1 and Y2 each represent, independently of one another, an oxygen atom or a sulfur atom.