| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electrophotographic photoreceptor suppressing residual potential accumulation. <P>SOLUTION: An electrophotographic photoreceptor has a substrate and an outermost layer as follows. The outermost layer on the substrate includes a polymer of a chain polymerizable monomer, which has a charge transporting structure and a chain polymerizable functional group and has equivalent amount of C=O bonds by molar ratio relative to the chain polymerizable functional group, and a thiol compound, which has a thiol group and equivalent amount of C=O bonds by molar ratio relative to the thiol group. The outermost layer has a sulfur element content of 5 mass% or more and 10 mass% or less as measured by glow discharge-optical emission spectroscopy, and has value A of 0.05 or less represented by a formula (1) (A=S1/S2), the value A obtained by Fourier transform infrared spectroscopy total reflection method under conditions that an internal reflection element is Ge and an incidence angle is 45 degrees. In the formula (1), S1 represents a peak area of a peak (2500 cm<SP POS="POST">-1</SP>or more and 2600 cm<SP POS="POST">-1</SP>or less) on the basis of a SH bond, and S2 represents a peak area of a peak (1640 cm<SP POS="POST">-1</SP>or more and 1750 cm<SP POS="POST">-1</SP>or less) on the basis of a C=O bond. <P>COPYRIGHT: (C)2013,JPO&INPIT |
