# US 7,745,083 B2 · Electrophotographic photosensitive member, process cartridge, and electrophotographic apparatus

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- Number: US 7,745,083 B2
- Document ID: US7745083B2
- Status: Granted
- Kind: B2
- Application number: 12/538,378
- Filed: 2009-08-10
- Published: 2009-12-03
- Granted: 2010-06-29
- Earliest claimed: 2005-06-23
- Assignees: Canon Kabushiki Kaisha
- Inventors: Hideaki Nagasaka; Kunihiko Sekido; Michiyo Sekiya; Nobumichi Miki; Yosuke Morikawa
- Web page: https://patentgrep.com/patent/US7745083B2

## CPC

- G03G 5/0696: {Phthalocyanines}
- G03G 5/0542: {Polyvinylalcohol, polyallylalcohol; Derivatives thereof, e.g. polyvinylesters, polyvinylethers, polyvinylamines}
- G03G 5/056: {Polyesters}
- G03G 5/0603: {containing halogens}
- G03G 5/0605: {Carbocyclic compounds}
- G03G 5/0607: {containing at least one non-six-membered ring}
- G03G 5/0609: {containing oxygen}
- G03G 5/0612: {containing nitrogen}
- G03G 5/06142: {arylamine}
- G03G 5/0618: {containing oxygen and nitrogen}
- G03G 5/065: {containing three relevant rings}
- G03G 5/144: {comprising inorganic material}
- G03G: ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY

## Abstract

An electrophotographic photosensitive member has a support, a charge generation layer containing a charge-generating material and a binder resin, provided on the support, and a hole transport layer containing a hole-transporting material, provided on the charge generation layer. The charge generation layer contains a phenanthrene compound having a structure represented by the following formula (2): wherein Z201 and Z202 each independently represent an oxygen atom, a ═C(CN)2 group or a ═N-Ph group; R201 represents a hydrogen atom, a halogen atom, a nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group; and R202 represents a halogen-atom-substituted alkyl group.

## Claims

### Claim 1

An electrophotographic photosensitive member comprising a support, a charge generation layer containing a charge-generating material and a binder resin, provided on the support, and a hole transport layer containing a hole-transporting material, provided on the charge generation layer, wherein;
said charge generation layer contains a phenanthrene compound having a structure represented by the following formula (2):
wherein Z101 and Z202 independently represent an oxygen atom, a ═C(CN)2 group or a ═N-Ph group; R201 represents a hydrogen atom, a halogen atom, a nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group; and R202 represents a halogen-atom-substituted alkyl group.

### Claim 2 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein the phenanthrene compound having the structure represented by the above formula (2) is contained in said charge generation layer in an amount of from 15% by weight to 120% by weight based on the weight of the binder resin in said charge generation layer.

### Claim 3 (depends on 2)

The electrophotographic photosensitive member according to claim 2, wherein the phenanthrene compound having the structure represented by the above formula (2) is contained in said charge generation layer in an amount of from 51% by weight to 80% by weight based on the weight of the binder resin in said charge generation layer.

### Claim 4 (depends on 1)

The electrophotographic photosensitive member according to claim 1, wherein said charge-generating material is a gallium phthalocyanine.

### Claim 5 (depends on 4)

The electrophotographic photosensitive member according to claim 4, wherein said gallium phthalocyanine is hydroxygallium phthalocyanine.

### Claim 6

A process cartridge comprising an electrophotographic photosensitive member and at least one means selected from the group consisting of a charging means, a developing means, a transfer means and a cleaning means, which are integrally supported; the process cartridge being detachably mountable to the main body of an electrophotographic apparatus;
said electrophotographic photosensitive member being an electrophotographic photosensitive member comprising a support, a charge generation layer containing a charge-generating material and a binder resin, provided on the support, and a hole transport layer containing a hole-transporting material, provided on the charge generation layer, wherein;
said charge generation layer contains a phenanthrene compound having a structure represented by the following formula (2)
wherein Z201 and Z202 each independently represent an oxygen atom, a ═C(CN)2 group or a ═N-Ph group; R201 represents a hydrogen atom, a halogen atom, a nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group; and R202 represents a halogen-atom-substituted alkyl group.

### Claim 7

An electrophotographic apparatus comprising an electrophotographic photosensitive member, a charging means, an exposure means, a developing means and a transport means;
said electrophotographic photosensitive member being an electrophotographic photosensitive member comprising a support, a charge generation layer containing a charge-generating material and a binder resin, provided on the support, and a hole transport layer containing a hole-transporting material, provided on the charge generation layer, wherein;
said charge generation layer contains a phenanthrene compound having a structure represented by the following formula (2):
wherein Z201 and Z202 each independently represent an oxygen atom, a ═C(CN)2 group or a ═N-Ph group; R201 represents a hydrogen atom, a halogen atom, a nitro group, a substituted or unsubstituted alkyl group or a substituted or unsubstituted alkoxy group; and R202 represents a halogen-atom-substituted alkyl group.