Electrophotographic photoreceptor, process cartridge, and image forming apparatus

By using a single-layer photosensitive layer in the electrophotographic photoreceptor, controlling the charge-generating material content and absorption coefficient, and combining hydroxygallium phthalocyanine and chlorogallium phthalocyanine, the problem of ghosting and photosensitivity is solved, and high sensitivity is achieved and low ghosting photoreceptor.

CN107870527AInactive Publication Date: 2018-04-03FUJIFILM BUSINESS INNOVATION CORP
8 Cites 2 Cited by

Patent Information

Application Number
CN201710311780.5
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Priority Date
2016-09-26
Filing Date
2017-05-05
Publication Date
2018-04-03
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

Existing electrophotographic photoreceptors are prone to ghosting during the image formation cycle, and it is difficult to maintain photosensitivity when reducing the content of charge-generating materials to avoid ghosting.

Method used

A single-layer photosensitive layer is used, including binder resin, charge generation material, electron transport material and hole transport material. The content of charge generation material is controlled between 0.9% and 1.8%, and the absorption coefficient at 1000nm wavelength is controlled. Below 0.008, use hydroxygallium phthalocyanine and chlorogallium phthalocyanine as charge generation materials, and optimize the dispersion state of the charge generation materials through specific coating liquid formulas and processing methods.

Benefits of technology

It effectively suppresses the appearance of ghost images, while improving the sensitivity of the photoreceptor, ensuring photosensitivity and charge generation efficiency.

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Abstract

The invention relates to an electrophotographic photoreceptor, a process cartridge, and an image forming apparatus. The electrophotographic photoreceptor includes a conductive substrate and a photosensitive layer of a single-layer type disposed on the conductive substrate. The photosensitive layer has an absorption coefficient of 0.008 or less at a wavelength of 1000 nm and contains a binder resin, a charge generating material, an electron transporting material, and a hole transporting material. The charge generating material is at least one selected from a hydroxygallium phthalocyanine pigment and a chlorogallium phthalocyanine pigment and is contained in an amount of 0.9% by weight or more and 1.8% by weight or less relative to the binder resin.
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Citation Information

Patent Citations

  • Electrophotographic photoreceptor

    JP1993265232A

  • Method for manufacturing electrophotographic photoreceptor

    JP2012042848A

  • Electrophotographic photoreceptor, process cartridge and image forming apparatus including the same

    JP2013050603A

  • Electrophotographic photoreceptor, process cartridge, and image forming apparatus

    CN103376675A

  • Wet-developing electrography photoreceptor and wet-developing image forming device

    CN1799008A

Cited By

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