ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER, AND ELECTROPHOTOGRAPHIC APPARATUS AND PROCESS CARTRIDGE EACH INCLUDING THE ELECTROPHOTOGRAPHIC PHOTOSENSITIVE MEMBER
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United States of America Patent
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Issued Date -
May 11, 2023
app pub date -
Oct 18, 2022
filing date -
Oct 29, 2021
priority date (Note) -
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Abstract
Provided is an electrophotographic photosensitive member including a support, a charge-generating layer, a first hole-transporting layer, and a second hole-transporting layer, wherein the second hole-transporting layer contains a hole-transportable compound represented by the formula (1) (mass: W1, energy value of the highest occupied molecular orbital: CTM1HOMO), and a hole-transportable compound represented by the formula (2) (mass: W2) and/or a hole-transportable compound represented by the formula (3) (mass: W3) (energy value of the highest occupied molecular orbital: CTM2HOMO), wherein a value calculated from the expression (I) is from 0.05% by mass to 5.0% by mass, and wherein the expression (II) is satisfied: (W2+W3)/(W1+W2+W3)×100 (% by mass)—Expression (I); and 0.05 (eV)≤|CTM2HOMO|-|CTM1HOMO|≤0.30 (eV)—(II).
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