Photoreceptor for electrophotography, method for manufacturing the same, and electrophotographic device

A photoreceptor for electrophotography, comprising:

• a conductive substrate;
• a photosensitive layer that is provided on the conductive substrate and that has an outermost surface layer containing at least a resin binder and an electron transport material, the resin binder being comprised of a polyarylate resin having a structural unit represented by Chemical Structural Formula 1 below, and the electron transport material being comprised of a compound having a structure represented by Structural Formula (ET2-3) below,
• Chemical Structural Formula 1:
• where partial structural formulae (A1), (A2), (B1), (B2), (C), (D), (E), and (F) represent respective structural units constituting the resin binder, a1, a2, b1, b2, c, d, e, and f represents mol % of the respective structural units (A1), (A2), (B1), (B2), (C), (D), (E), and (F), where a1, a2, b1, and b2 are not zero, where a1+a2+b1+b2+c+d+e+f is 100 mol %, and where c+d+e+f range from greater than 0 up to 10 mol % and e and f are not both zero mol %;
• W1 and W2 are different,
• W1 is selected from the group consisting of a single bond, —O—, and —CR22R23—, where C is a carbon atom and R22 and R23 are different, are monovalently bonded to the carbon atom of —CR22R23—, and are respectively selected from the group consisting of a hydrogen atom, an alkyl group having from 1 to 12 carbon atoms, a halogenated alkyl group, and a substituted or unsubstituted aryl group having from 6 to 12 carbon atoms;
• and
• W2 is selected from the group consisting of a single bond, —O—, and —CR22R23—, where R22 and R23 are the same or different and are respectively selected from the group consisting of a hydrogen atom and an alkyl group having 1 carbon atom, wherein, in the partial structural formulas (A1) and (B1), when the group W1 is —CR22R23—, the groups R22 and R23 may bond together to form a cyclohexylidene group, and
• R1 to R20 are the same or different and are respectively selected from the group consisting of a hydrogen atom, an alkyl group having from 1 to 8 carbon atoms, a fluorine atom, a chlorine atom, or a bromine atom;
• R21 represents a hydrogen atom, an alkyl group having from 1 to 20 carbon atoms, an aryl group optionally containing a substituent, a cycloalkyl group optionally containing a substituent, a fluorine atom, a chlorine atom, and a bromine atom, and s and t each represent an integer of 1 or more, and
• Structural Formula (ET2-3):