Electrophotographic photoreceptor, electrophotographic apparatus comprising the same, and package of electrophotographic photoreceptor
In a negatively-chargeable laminate-type electrophotographic photoreceptor, a charge generation layer and another charge transport layer are arranged on a conductive substrate directly or via an intermediate layer. The charge transport layer contains at least a hole-transporting substance, an electron-transporting substance and a binder resin; the mass ratio (RPN) [% by mass] between mass (P) of the hole-transporting substance and mass (N) of the electron-transporting substance is represented by the following equation (1), and satisfies the following equation (2):RPN=(N/(P+N))×100  (1)1≦RPN≦40  (2); andwhen a voltage of +6 kV is applied to the photoreceptor for 5 seconds via a resin sheet having a thickness of 50 μm and a surface resistivity of 2×107 Ω/cm2, the surface potential difference (ΔVo) and half-tone potential difference (ΔVh) between before and after the voltage application are both 15 V or less.
FUJI ELECTRIC CO., LTD.
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Masaru Hirotaka Toshiki Toshiki
Takeuchi Kobayashi Takeuchi Obinata