Electrophotographic photoreceptor, process cartridge, and image forming apparatus
AssigneeFUJIFILM Business Innovation Corp.
InventorsYoichi Kigoshi, Michinori Fukuma, Ryota Kaneko, Jiro Korenaga
Life of this patent
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Abstract
An electrophotographic photoreceptor includes a conductive substrate, an undercoat layer on the conductive substrate, a charge generation layer on the undercoat layer, a charge transport layer on the charge generation layer, and an inorganic protection layer on the charge transport layer, in which the charge transport layer contains a binder resin and a charge transport material, and, when impedance of the charge transport layer is measured, a ratio (C1Hz/C10Hz) of an electrostatic capacitance C1Hz at 1 Hz to an electrostatic capacitance C10Hz at 10 Hz is 1.1 or less.
Claims20
An electrophotographic photoreceptor comprising:
- a conductive substrate;
- an undercoat layer on the conductive substrate;
- a charge generation layer on the undercoat layer;
- a charge transport layer on the charge generation layer;
- and
- an inorganic protection layer on the charge transport layer,
- wherein the charge transport layer contains a binder resin and a charge transport material, and, when impedance of the charge transport layer is measured, a ratio (C1Hz/C10Hz) of an electrostatic capacitance C1Hz at 1 Hz to an electrostatic capacitance C10Hz at 10 Hz is 1.1 or less.
An electrophotographic photoreceptor comprising:
- a conductive substrate;
- an undercoat layer on the conductive substrate;
- a charge generation layer on the undercoat layer;
- a charge transport layer on the charge generation layer;
- and
- an inorganic protection layer on the charge transport layer,
- wherein the charge transport layer contains a binder resin and two or more charge transport materials, and an amount of the charge transport materials contained relative to a total amount of the charge transport materials and the binder resin in the charge transport layer is 10 mass % or more and 50 mass % or less,
- wherein the two or more charge transport materials contain at least one selected from triarylamine derivatives represented by structural formula (a-1) below and benzidine derivatives represented by structural formula (a-2) below:
- wherein, in structural formula (a-1), ArT1, ArT2, and ArT3 each independently represent a substituted or unsubstituted aryl group, —C6H4—C(RT4)═C(RT5)(RT6), or —C6H4—CH═CH—CH═C(RT7)(RT8);
- RT4, RT5, RT6, RT7, and RT8 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- wherein, in structural formula (a-2), RT91 and RT92 each independently represent a hydrogen atom, a halogen atom, an alkyl group having 1 to 5 carbon atoms, or an alkoxy group having 1 to 5 carbon atoms;
- RT101, RT102, RT111, and RT112 each independently represent a halogen atom, an alkyl group having 1 to 5 carbon atoms, an alkoxy group having 1 to 5 carbon atoms, an amino group substituted with an alkyl group having 1 or 2 carbon atoms, a substituted or unsubstituted aryl group, —C(RT12)═C(RT13)(RT14), or —CH═CH—CH═C(RT15)(RT16), and RT12, RT13, RT14, RT15 and RT16 each independently represent a hydrogen atom, a substituted or unsubstituted alkyl group, or a substituted or unsubstituted aryl group;
- Tm1, Tm2, Tn1, and Tn2 each independently represent an integer of 0 or more and 2 or less.
Dependencies are inferred from the claim text.