Electrophotographic apparatus and process cartridge

An electrophotographic apparatus comprising:

• an electrophotographic photosensitive member;
• a charging unit configured to charge a surface of the electrophotographic photosensitive member;
• an exposing unit configured to irradiate the charged surface of the electrophotographic photosensitive member with light to form an electrostatic latent image on the surface of the electrophotographic photosensitive member;
• a developing unit, which includes toner, and which is configured to develop the electrostatic latent image formed on the surface of the electrophotographic photosensitive member with the toner to form a toner image on the surface of the electrophotographic photosensitive member;
• and
• a transfer unit configured to transfer the toner image from the surface of the electrophotographic photosensitive member onto a transfer material,
• wherein the electrophotographic photosensitive member includes a monolayer type photosensitive layer containing a charge generating material, a hole transporting material, an electron transporting material, and a binder resin,
• wherein the photosensitive layer contains a polyarylate resin having a structural unit represented by the following formula (1) and a structural unit represented by the following formula (2) as the binder resin,
• wherein the toner is toner containing toner particles,
• wherein the toner particles each contain a toner base particle and an external additive adhering to a surface of the toner base particle, and
• wherein the external additive contains at least aluminum oxide particles.