Electrophotographic photoreceptor, electrophotographic image forming method, and electrophotographic device

An electrophotographic photoreceptor comprising:

• a conductive substrate formed of a conductive material;
• and
• a photosensitive layer disposed on the conductive substrate and containing oxotitanium phthalocyanine having a crystal form showing a diffraction peak at a Bragg angle 2θ (2θ±0.2°) of 27.2° in an X-ray diffraction spectrum and an enamine compound represented by the following general formula (1).
• wherein Ar1 and Ar2 each represent an aryl group which may have a substituent or a heterocyclic group which may have a substituent;
• Ar3 represents an aryl group which may have a substituent, a heterocyclic group which may have a substituent, an aralkyl group which may have a substituent, or an alkyl group which may have a substituent;
• Ar4 and Ar5 each represent a hydrogen atom, an aryl group which may have a substituent, a heterocyclic group which may have a substituent, an aralkyl group which may have a substituent, or an alkyl group which may have a substituent, but it is excluded that Ar4 and Ar5 are hydrogen atoms at the same time;
• Ar4 and Ar5 may bond to each other via an atom or an atomic group to form a cyclic structure;
• “a” represents an alkyl group which may have a substituent, an alkoxy group which may have a substituent, a dialkylamino group which may have a substituent, an aryl group which may have a substituent, a halogen atom, or a hydrogen atom;
• m indicates an integer of from 1 to 6;
• when m is 2 or more, then the “a”s may be the same or different and may bond to each other to form a cyclic structure;
• R1 represents a hydrogen atom, a halogen atom, or an alkyl group which may have a substituent;
• R2, R3 and R4 each represent a hydrogen atom, an alkyl group which may have a substituent, an aryl group which may have a substituent, a heterocyclic group which may have a substituent, or an aralkyl group which may have a substituent;
• n indicates an integer of from 0 to 3;
• when n is 2 or 3, then the R2s may be the same or different and the R3s may be the same or different, but when n is 0, Ar3 is a heterocyclic group which may have a substituent.