ELECTROPHOTOGRAPHIC PHOTOSENSITIVE ELEMENT, PROCESS CARTRIDGE AND ELECTROPHOTOGRAPHIC DEVICE Russian patent published in 2014 - IPC G03G5/14 

FIELD: physics, optics.

SUBSTANCE: present invention relates to an electrophotographic photosensitive element, a process cartridge and an electrophotographic device having the said electrophotographic photosensitive element. Provided is an electrophotographic photosensitive element, having a special conducting layer and which ensures smaller change in potential of the illumination zone and residual potential during repeated image reproduction, as well as a process cartridge and an electrophotographic device having said electrophotographic photosensitive element. When conducting tests, where voltage of -1.0 kV, having only a dc voltage component, is continuously applied to the conducting layer for 1 hour, the conducting layer has a bulk resistivity which satisfies mathematical expressions (1) and (2), as values before and after the test: -2.00≤(log|ρ₂|-log|ρ₁|)≤2.00 (1) and 1.0×10⁸≤ρ₁≤2.0×10¹³ (2), where in expressions (1) and (2): ρ₁ is the bulk resistivity (Om·cm) of the conducting layer measured before testing; ρ₂ is the bulk resistivity (Om·cm) of the conducting layer measured after testing.

EFFECT: providing an electrophotographic photosensitive element, having less change in potential of the illumination zone and residual potential during repeated image reproduction, as well as providing a process cartridge and an electrophotographic device having said electrophotographic photosensitive element.

5 cl, 6 dwg, 3 tbl