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AssigneeSharp Kabushiki Kaisha
InventorsYuriko Shindoh, Hiroko Ishibashi, Kazushige Morita, Yoshihide Shimoda
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An electrophotographic photoreceptor, in which the increase of VL is controlled below 15 V by controlling the content ratio M (ppm) of a charge transporting material CTM2 to a charge transporting material CTM1 within a specific range, wherein the ionization potential Ip(2) of the CTM2 is smaller than the ionization potential Ip(1) of the CTM1 in the constituent of the photosensitive layer, and thereby the electrophotographic photoreceptor has only a little reduction of image concentration. A method for producing an electrophotographic photoreceptor having ΔVL which is controlled below 15 V, wherein, in a case where the ionization potential of the charge transporting material used in the previous run of production is small, ΔVL can be set below 15 V by using, in the next production, a dip coating liquid, which comprises, as a constitutive material, a charge transporting material in which the difference between the ionization potential of the current material and that of the previous material is set below 0.25 eV.
An electrophotographic photoreceptor comprising a photosensitive layer, wherein, in the constituents of said photosensitive layer, the ionization potential Ip(2) of a charge transporting material CTM2 is smaller than the ionization potential Ip(1) of a charge transporting material CTM1, and the content ratio M1 (ppm) of the CTM2 to the CTM1 is within the range represented by the following formula (1),
An electrophotographic photoreceptor comprising a photosensitive layer, wherein, in the constituents of said photosensitive layer, the ionization potential Ip(2) of a charge transporting material CTM2 is smaller than the ionization potential Ip(1) of a charge transporting material CTM1, and the content ratio M2 (ppm) of the CTM2 to the CTM1 is within the range represented by the following formula (2):
A method for producing two or more different electrophotographic photoreceptors using different charge transporting materials in a single production apparatus, wherein the difference ΔIp between the ionization potential Ip(1) of a charge transporting material CTM1 and the smaller ionization potential Ip(2) of a charge transporting material CTM2 which has been used for the previous production, is represented by the following formula (3),
A method for producing two or more types of electrophotographic photoreceptors using a single production apparatus and different charge transporting materials, wherein the difference ΔIp between the ionization potential Ip(1) of a charge transporting material CTM1 and the smaller ionization potential Ip(2) of a charge transporting material CTM2 which is used for the previous production, is represented by the following formula (4):
Dependencies are inferred from the claim text.