Electrophotographic photoreceptor, process cartridge, and image forming apparatus

An electrophotographic photoreceptor comprising:

• a conductive substrate;
• and
• a photosensitive layer that is a single layer type photosensitive layer provided on the conductive substrate,
• wherein the photosensitive layer includes a binder resin, a charge generating material, a hole transport material, a first electron transport material represented by the following formula (1), and a second electron transport material represented by the following formula (2),
• wherein X1 represents an oxygen atom or ═C(CN)2;
• each of R11, R12, R13, R14, R15, R16, and R17 independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group;
• and R18 represents an alkyl group, -L111-O—R112, an aryl group, or an aralkyl group;
• provided that L111 represents an alkylene group, and R112 represents an alkyl group,
• wherein X2 represents an oxygen atom or ═C(CN)2;
• each of R21, R22, R23, R24, R25, R26, and R27 independently represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group or an aralkyl group;
• and R28 represents an alkylene group having 4 to 20 carbon atoms or -(L221-O-L221)n-;
• provided that L221 each independently represents an alkylene group having 1 to 4 carbon atoms and n represents an integer of 1 to 10.