Electrophotographic photosensitive member, process cartridge and electrophotographic apparatus, and chlorogallium phthalocyanine crystal and method for producing the same

Patent metadata

Field	Value
Publication number	US-9720337-B2
Application number	US-201514920644-A
Country	US
Kind code	B2
Filing date	Oct 22, 2015
Priority date	Oct 29, 2014
Publication date	Aug 1, 2017
Grant date	Aug 1, 2017

Abstract

An electrophotographic photosensitive member includes a support and a photosensitive layer in this order. The photosensitive layer contains a chlorogallium phthalocyanine crystal. The chlorogallium phthalocyanine crystal has one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum. When a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.

First claim

What is claimed is:

1. An electrophotographic photosensitive member comprising:
a support; and
a photosensitive layer in this order,
wherein the photosensitive layer comprises a chlorogallium phthalocyanine crystal,
the chlorogallium phthalocyanine crystal has one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum, and
when a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.

2. An electrophotographic photosensitive member comprising:
a support;
a charge generating layer; and
a charge transporting layer in this order,
wherein the charge generating layer comprises a chlorogallium phthalocyanine crystal,
the chlorogallium phthalocyanine crystal has one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum, and
when a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.

3. The electrophotographic photosensitive member according to claim 1 , wherein the absorbance of the second peak is 0.65 to 0.99 times the absorbance of the first peak.

4. The electrophotographic photosensitive member according to claim 1 , wherein the second peak lies in a wavelength range of 791 nm or more and 798 nm or less.

5. The electrophotographic photosensitive member according to claim 1 , wherein the first peak lies in a wavelength range of 657 nm or more and 665 nm or less.

6. The electrophotographic photosensitive member according to claim 1 , wherein the chlorogallium phthalocyanine crystal comprises at least one organic compound selected from the group consisting of acetone, dimethyl sulfoxide, N-methylformamide, and N,N-dimethylformamide therein.

7. A process cartridge detachably attachable to a main body of an electrophotographic apparatus, the process cartridge integrally supporting an electrophotographic photosensitive member and at least one selected from the group consisting of a charging device, a developing device, a transfer device, and a cleaning member,
wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer in this order,
the photosensitive layer comprises a chlorogallium phthalocyanine crystal,
the chlorogallium phthalocyanine crystal has one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum, and
when a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.

8. An electrophotographic apparatus comprising:
an electrophotographic photosensitive member;
a charging device;
an exposure device;
a developing device; and
a transfer device,
wherein the electrophotographic photosensitive member comprises a support and a photosensitive layer in this order,
the photosensitive layer comprises a chlorogallium phthalocyanine crystal,
the chlorogallium phthalocyanine crystal has one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum, and
when a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.

9. A chlorogallium phthalocyanine crystal comprising one or more peaks in each of a wavelength range of 646 nm or more and 668 nm or less and a wavelength range of 782 nm or more and 809 nm or less in an absorption spectrum, and
wherein when a peak with a maximum absorbance among the peaks in the wavelength range of 646 nm or more and 668 nm or less is assumed to be a first peak and a peak with a maximum absorbance among the peaks in the wavelength range of 782 nm or more and 809 nm or less is assumed to be a second peak, an absorbance of the first peak is larger than an absorbance of the second peak.

Assignees

• Canon Kk

Inventors

• Nishida Tsutomu
• Tanaka Masato
• Kawahara Masataka

Classifications

• C09B47/045

  Special non-pigmentary uses, e.g. catalyst, photosensitisers of phthalocyanine dyes or pigments · CPC title

• G03G5/047 Primary

  characterised by the charge-generation layers or charge transport layers {(G03G5/0433 and G03G5/0436 take precedence)} · CPC title

• G03G5/0696

  Phthalocyanines · CPC title

• C09B67/0026

  of phthalocyanine pigments · CPC title

• C09B47/00

  Porphines; Azaporphines {(non-dyeing compounds C07D487/22)} · CPC title