| 摘要 |
An electrophotographic photoreceptor includes a conductive substrate and a single-layer photosensitive layer which is provided on the conductive substrate and contains a binder resin, at least one charge generating material selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment, a first electron transporting material defined in the specification, a second electron transporting material defined in the specification, and a hole transporting material defined in the specification, wherein a total content of all electron transporting materials is greater than or equal to 4 parts by weight with respect to 100 parts by weight of a total solid content of the photosensitive layer, and an average loss elastic modulus E″ of the photosensitive layer, which is obtained by measuring dynamic viscoelasticity at a temperature of from 35° C. to 50° C. and a frequency of 0.5 Hz, is less than or equal to 1.000×106. |
| 主权项 |
1. An electrophotographic photoreceptor comprising:
a conductive substrate, and a single-layer photosensitive layer which is provided on the conductive substrate and contains a binder resin, at least one charge generating material selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment, a first electron transporting material represented by the following formula (1), a second electron transporting material represented by the following formula (2), and a hole transporting material represented by the following formula (3), wherein a total content of all electron transporting materials is greater than or equal to 4 parts by weight with respect to 100 parts by weight of a total solid content of the photosensitive layer, and an average loss elastic modulus E″ of the photosensitive layer, which is obtained by measuring dynamic viscoelasticity at a temperature of from 35° C. to 50° C. and a frequency of 0.5 Hz, is less than or equal to 1.000×106: wherein R11, R12, R13, R14, R15, R16, and R17 each independently represent a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an aryl group, or an aralkyl group, R18 represents an alkyl group, -L19-O—R20, an aryl group, or an aralkyl group, L19 represents an alkylene group, and R20 represents an alkyl group; wherein R21, R22, R23, and R24 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, a halogen atom, or a phenyl group; and wherein R1, R2, R3, R4, R5, and R6 each independently represent a hydrogen atom, an alkyl group, an alkoxy group, a phenoxy group, a halogen atom, or a phenyl group which may have a substituent selected from an alkyl group, an alkoxy group, and a halogen atom, and p and q each independently represent 0 or 1, wherein a weight ratio of the first electron transporting material to the second electron transporting material (the first electron transporting material of the formula (1)/the second electron transporting material of the formula (2)) is from 2/1 to 4/1. |
