Electrophotographic photoconductor, method of manufacturing the same, and electrophotographic device including the same

An electrophotographic photoconductor, comprising:

• a conductive substrate;
• and
• a photosensitive layer provided on the conductive substrate and containing a charge generation material, a hole transport material, a first electron transport material, a second electron transport material, a resin binder, and an inorganic oxide filler surface-treated with a silane coupling agent,
• wherein the first electron transport material and the silane coupling agent have a difference ΔSPa in a dipole-dipole force component, that is a Hansen solubility parameter, between the first electron transport material and the silane coupling agent that satisfies a relationship of ΔSPa<2.50,
• wherein the second electron transport material and the silane coupling agent have a difference ΔSPb in a dipole-dipole force component, that is a Hansen solubility parameter, between the second electron transport material and the silane coupling agent that satisfies a relationship of ΔSPb<2.50,
• wherein the first electron transport material and the second electron transport material have a difference ΔSPc in a dipole-dipole force component, that is a Hansen solubility parameter, between the first electron transport material and the second electron transport material that satisfies a relationship of 0.30<ΔSPc<1.00,
• wherein the resin binder and the silane coupling agent have a difference ΔSPd in a London dispersion force component, that is a Hansen solubility parameter, between the resin binder and the silane coupling agent that satisfies a relationship of ΔSPd<2.00, and
• wherein the second electron transport material is present in an amount ranging from 3% by mass to 40% by mass with respect to combined content of the first electron transport material and the second electron transport material.