Photoreceptor for electrophotography

• US 5,733,697 A
• Filed: 02/26/1997
• Issued: 03/31/1998
• Est. Priority Date: 02/28/1996
• Status: Expired due to Term

• Current Assignee: NEC Corporation
• Original Assignee: NEC Corporation
• Inventors: Hirano, Akira, Endoh, Hiroyuki
• Primary Examiner(s): Martin, Roland
• Application Number:
  US08/806,858
• Time in Patent Office: 398 Days
• Field of Search: 430/59, 430/83
• US Class Current: 430/58.75
• 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 5/06147 alkenylarylamine

Abstract

A photoreceptor for electrophotography exhibits high photosensitivity and provides excellent potential stability and durability upon repeated use. The photoreceptor for electrophotography contains, as a charge-transport material, a triphenylamine derivative represented by the following formula (1) or (2) or the mixture thereof: ##STR1## wherein each of Ar¹ through Ar¹⁰ is a phenyl group which may or may not have a substituent, and the substituent on any of the groups Ar¹ through Ar¹⁰ is a group or an atom selected from the group consisting of C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylamino, C1-C4 dialkylamino, C1-C4 alkylthio, C1-C4 halogenoalkyl, amino, and a halogen atom; each of R¹ through R¹⁰ represents a hydrogen atom or a methyl group; each of R¹¹ through R¹⁵ represents a hydrogen atom, a C1-C4 alkyl group, a C6-C14 aryl group, or a C7-C14 aralkyl group, wherein the substitutents R¹¹ through R¹⁵ may be identical to or different from one another.

Claims

1. A photoreceptor for electrophotography comprising a first layer comprising:

(A) a charge-generating material;

(B) a charge-transport material, wherein said charge-transport material is at least one of the compounds represented by the following formula (1);

##STR424## wherein each of Ar¹ through Ar⁶ is a phenyl group which may or may not have one or more substituents which may be identical to or different from one another, and the substituent on any of the groups Ar¹ through Ar⁶ is a group or an atom selected from the group consisting of C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylamino, C1-C4 dialkylamino, C1-C4 alkylthio, C1-C4 halogenoalkyl, amino, and a halogen atom; and

each of R¹ through R⁶ is a member selected from a group comprised of a hydrogen atom and a methyl group.

3. A photoreceptor according to claim 1 or 2, wherein said first layer contains said at least one of the compounds represented by formula (1) in an amount from 20 to 70% by weight.

2. A photoreceptor for electrophotography, comprising:

(A) a first layer comprising a charge transport material, wherein said charge transport material is at least one of the compounds represented by the following formula (1);

##STR425## and (B) a second layer comprising a charge generating material.

4. A photoreceptor for electrophotography comprising a first layer comprising:

(A) a charge-generating material;

(B) a charge-transport material, wherein said charge-transport material is at least one of the compounds represented by the following formula (2);

##STR426## wherein each of Ar⁷ through Ar¹⁰ is a phenyl group which may or may not have one or more substituents which may be identical to or different from one another, and the substituent on any of the groups Ar⁷ through Ar¹⁰ is a group or an atom selected from the group consisting of C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylamino, C1-C4 dialkylamino, C1-C4 alkylthio, C1-C4 halogenoalkyl, amino, and a halogen atom; and

each of R⁷ through R¹⁰ is a member selected from a group comprised of a hydrogen atom and a methyl group, and each of R¹¹ through R¹⁵, which may be identical to or different from one another, is a member selected from a group comprised of a hydrogen atom, a C1-C4 alkyl group, a C6-C14 aryl group, and a C7-C14 aralkyl group.

6. A photoreceptor according to claim 4 or 5, wherein said first layer contains said at least one of the compounds represented by formula (2) in an amount from 20 to 70% by weight.

7. A photoreceptor according to claim 4, wherein said first layer contains, in addition to said at least one of the compounds represented by formula (2), at least one of the compounds represented by the formula (1):

##STR428## wherein each of Ar¹ through Ar⁶ is a phenyl group which may or may not have one or more substituents which may be identical to or different from one another, and the substituent on any of the groups Ar¹ through Ar⁶ is a group or an atom selected from the group consisting of C1-C4 alkyl, C1-C4 alkoxy, C1-C4 alkylamino, C1-C4 dialkylamino, C1-C4 alkylthio, C1-C4 halogenoalkyl, amino, and a halogen atom; and

each of R¹ through R⁶ is a member selected from a group comprised of a hydrogen atom and a methyl group.

8. A photoreceptor for electrophotography according to claim 7, wherein said first layer contains said at least one of the compounds represented by formula (2) and said at least one of the compound represented by formula (1) in an amount from 20 to 70% by weight.

5. A photoreceptor for electrophotography, comprising:

(A) a first layer comprising a charge transport material, wherein said charge transport material is at least one of the compounds represented by the following formula (1);

##STR427## and (B) a second layer comprising a charge generating material.