Single-layer type electrophotographic photoreceptor for positive charging, electrophotographic photoreceptor cartridge, and image forming apparatus

A single-layer type electrophotographic photoreceptor for positive charging, the photoreceptor comprising:

• a conductive support;
• and
• a photosensitive layer disposed on the conductive support, the photosensitive layer including a binder resin, a charge generation material, a hole transport material, and an electron transport material within the same layer,
• wherein the electron transport material is a compound represented by Formula (1), and
• the photosensitive layer contains an aromatic compound represented by Formula (7) and having a molecular weight of 180 to 400:
• [in Formula (1), R1 to R4 each independently represent a hydrogen atom, an alkyl group having 1 to 20 carbon atoms that may have a substituent, or an alkenyl group having 1 to 20 carbon atoms that may have a substituent, R1 and R2, or R3 and R4 may be bonded to each other to form a cyclic structure, and X represents an organic residue having a molecular weight of 120 to 250]
• [in Formula (7), Ar1 and Ar2 each independently represent an aryl group that may have a substituent, and x and y each independently represent an integer of 0 to 2].