Photoreceptor with layered charge generation section

• US 6,376,141 B1
• Filed: 04/13/2001
• Issued: 04/23/2002
• Est. Priority Date: 04/13/2001
• Status: Expired due to Term

• Current Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Original Assignee: Xerox Corporation (Xerox Holdings Corp.)
• Inventors: Nonkes, Steven P, Mishra, Satchidanand, Carmichael, Kathleen M., Horgan, Anthony M.
• Primary Examiner(s): GOODROW, JOHN L
• Application Number:
  US09/833,764
• Time in Patent Office: 375 Days
• Field of Search: 430/57.3, 430/58.8, 430/78, 430/129
• US Class Current: 430/57.3
• CPC Class Codes: G03G 5/047 characterised by the charge-generation layers or charge transport layers G03G5/0433 and G03G5/0436 take precedence
• CPC Class Codes: G03G 5/0644 containing two or more hetero rings
• CPC Class Codes: G03G 5/0646 in the same ring system
• CPC Class Codes: G03G 5/0648 containing two relevant rings
• CPC Class Codes: G03G 5/065 containing three relevant rings
• CPC Class Codes: G03G 5/0651 containing four relevant rings
• CPC Class Codes: G03G 5/0653 containing five relevant rings
• CPC Class Codes: G03G 5/0655 containing six relevant rings
• CPC Class Codes: G03G 5/0657 containing seven relevant rings
• CPC Class Codes: G03G 5/0659 containing more than seven relevant rings
• CPC Class Codes: G03G 5/0696 Phthalocyanines

Abstract

An electrophotographic imaging member with a charge generation section having separate layers of benzimidazole perylene photoconductive pigment and hydroxygallium ptalocyanine photoconductive pigment.

Claims

1. An electrophotographic imaging member comprising:

a charge generation section comprising a first layer comprising hydroxygallium phthalocyanine photoconductive pigment in polymer or copolymer binder and a second layer comprising benzimidazole perylene photoconductive pigment in polymer or copolymer binder, wherein the benzimidazole perylene layer and the hydroxygallium phthalocyanine layer are immediately adjacent to each other; and

a charge transport layer adjacent to the hydroxygallium phthalocyanine layer of the charge generation section.

2. The electrophotographic imaging member of claim 1, wherein hydroxygallium phthalocyanine is the sole photoconductive pigment in the first layer.

3. The electrophotographic imaging member of claim 1, wherein benzimidazole perylene is the sole photoconductive pigment in the second layer.

4. The electrophotographic imaging member of claim 1, wherein hydroxygallium phthalocyanine is the sole photoconductive pigment in the first layer and benzimidazole perylene is the sole photoconductive pigment in the second layer.

5. The electrophotographic imaging member of claim 1, wherein the electrophotographic imaging member is sensitive to wavelengths of light between 450 and 880 nanometers.

6. The electrophotographic imaging member of claim 1, wherein the electrophotographic imaging member exhibits greater spectral sensitivity and greater broadband sensitivity compared to an electrophotographic imaging member comprising a charge generation section consisting essentially of benzimidazole perylene.

7. The electrophotographic imaging member of claim 1, wherein the electrophotographic imaging member exhibits greater broadband and spectral sensitivity in the near infrared region compared to an electrophotographic imaging member comprising a charge generation section consisting essentially of benzimidazole perylene.

8. The electrophotographic imaging member of claim 1, wherein the electrophotographic imaging member exhibits equivalent or greater broadband and spectral sensitivity compared to an electrophotographic imaging member comprising a charge generation section consisting essentially of hydroxygallium phthalocyanine.

9. The electrophotographic imaging member of claim 1, further comprising a substrate adjacent to the benzimidazole perylene layer of the charge generation section.

10. The electrophotographic imaging member of claim 1, further comprising a substrate adjacent to the charge transport layer and to the hydroxygallium phthalocyanine layer of the charge generation section.

11. The electrophotographic imaging member of claim 10, further comprising an overcoating layer adjacent to the benzimidazole perylene layer of the charge generation section.

12. The electrophotographic imaging member of claim 1, further comprising aryl amine hole transport molecules in the charge generation section.

13. A method of manufacturing an electrophotographic imaging member comprising:

layering a first dispersion comprising benzimidazole perylene photoconductive pigment in polymer or copolymer binder upon a substrate to form a layer of benzimidazole perylene;

layering a second dispersion comprising hydroxygallium phthalocyanine in polymer or copolymer binder to form a layer of hydroxygallium phthalocyanine immediately adjacent to the layer of benzimidazole perylene; and

applying a charge transport layer adjacent to the hydroxygallium phthalocyanine layer.