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 hole transport material, a first electron transport material, a second electron transport material, and a binder resin,
• the binder resin includes a polyarylate resin,
• the polyarylate resin includes repeating units represented by formulas (1), (2), (3), and (4),
• a percentage of the number of repeats of the repeating unit represented by the formula (3) relative to a total of the number of repeats of the repeating unit represented by the formula (1) and the number of repeats of the repeating unit represented by formula (3) is greater than 0% and less than 20%,
• 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 formula (B10), (B11), (B12), (B13), or (B14),
• where in the formula (1), Rand R2 each represent, independently of one another, a hydrogen atom or a methyl group and X represents a divalent group represented by formula (X1) or (X2), and
• in the formula (2), W represents a divalent group represented by formula (W1) or (W2),
• in the formula (X1), t represents an integer of at least 1 and no greater than 3 and * represents a bond, and
• in the formula (X2), R3 and R4 each represent a hydrogen atom or an alkyl group with a carbon number of at least 1 and no greater than 4, R3 and R4 represent chemical groups different from each other, and * represents a bond,
• in the formulas (W1) and (W2), * represents a bond,
• where Q51, Q52, Q53, Q54, Q55, and Q56 in the formula (A15), Q61 and Q62 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
• Y1 and Y2 in the formula (A15) each represent, independently of one another, an oxygen atom or a sulfur atom.