| 主权项 |
1. A multi-layer electrophotographic photosensitive member comprising a conductive substrate and a photosensitive layer, wherein
the photosensitive layer includes a charge generating layer that contains a charge generating material and a charge transport layer that contains a hole transport material and a binder resin, the charge generating material contains a titanyl phthalocyanine that exhibits a peak at a Bragg angle (2θ±0.2°) of 27.2° in a CuKα characteristic X-ray diffraction spectrum, the hole transport material contains a triarylamine derivative represented by generic formula (1) shown below, and the hole transport material has a mass ratio of at least 0.30 and no greater than 0.55 relative to the binder resin in the charge transport layer, where in the general formula (1), R1 and R2 represent, independently of one another, a halogen atom, an optionally substituted alkyl group having a carbon number of at least 1 and no greater than 6, an optionally substituted alkoxy group having a carbon number of at least 1 and no greater than 6, or an optionally substituted aryl group having a carbon number of at least 6 and no greater than 12, k and l represent, independently of one another, an integer of at least 0 and no greater than 4, when k represents an integer greater than 1, a plurality of chemical groups R1 bonded to the same aromatic ring are the same as or different from one another, when l represents an integer greater than 1, a plurality of chemical groups R2 bonded to the same aromatic ring are the same as or different from one another, m and n represent, independently of one another, an integer of at least 1 and no greater than 3, and m and n represent integers different from one another. |
