Electrophotographic photosensitive member, process cartridge, and image forming apparatus
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United States of America Patent
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Apr 28, 2020
Grant Date -
Dec 13, 2018
app pub date -
Jun 8, 2018
filing date -
Jun 12, 2017
priority date (Note) -
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Abstract
An electrophotographic photosensitive member includes a conductive substrate and a photosensitive layer having a single-layer structure. The photosensitive layer contains a charge generating material, an electron transport material, a polycarbonate resin, and a hole transport material. The electron transport material includes a compound having a halogen atom and represented by general formula (1), (2), (3), (4), or (5). The polycarbonate resin has a terminal group having a fluoro group and represented by general formula (10). The hole transport material includes a compound represented by general formula (20), (21), (22), (23), (24), (25), (26), or (27). A charge of calcium carbonate as measured by charging the calcium carbonate through friction with the photosensitive layer is at least +6.5 μC/g. The photosensitive layer has a Vickers hardness of at least 17.0 HV at 45° C.
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