Claims
- 1. A layered-type organic electrophotographic photoreceptor in which a charge generating layer containing organic charge generating material and a charge transporting layer containing organic charge transporting material are constructed on an electroconductive support, characterized in that the photoreceptor has a value n of not greater than 0.5 in the following equation (1) of an approximated straight line obtained by plotting both the electric field of from 1.times.10.sup.5 V/cm to 5.times.10.sup.5 V/cm and the quantum yield in a logarithmic scale:
- n=n.sub.0 E.sup.n ( 1)
- where n represents a quantum yield as the whole photoreceptor, E represents an electric field of from 1.times.10.sup.5 V/cm to 5.times.10.sup.5 V/cm, and n.sub.0 represents a constant determined by said approximation, and specific to the photoreceptor, that a film thickness of said charge transporting layer is from about 30 to 60 .mu.m (micrometer) and that said organic charge generating material comprises at least one material selected from the group consisting of azo dyes, phthalocyanine dyes, quinacridone dyes, perylene dyes, polycyclic quinone dyes, indigo dyes, benzoimidazole dyes, pyrylium salts, thiapyrylium salts, and squarylium salt pigments.
- 2. A layered-type organic electrophotographic photoreceptor according to claim 1, in which the film thickness of said charge transporting layer is from 35 .mu.m to 50 .mu.m.
- 3. A layered-type organic electrophotographic photoreceptor according to claim 2 or 1, in which said organic charge transporting material comprises at least one material selected from the group consisting of carbozole, indole, imidazole, oxazole, thiazole, oxadiazole, pyrazole, pyrazoline, thiadiazole, aniline derivatives, hydrazone derivatives, conjugated system compounds having stilbene skelton and those polymers having groups derived from such compounds in a main or side chain, 2,4,7-trinitrofluorenone and tetracyano quinodimethane.
Priority Claims (1)
Number |
Date |
Country |
Kind |
63-96144 |
Apr 1988 |
JPX |
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Parent Case Info
This is a continuation of copending application(s) Ser. No. 07/593,517 filed on Oct. 2, 1990, now abandoned which is a continuation of Ser. No. 07/339,7 filed Apr. 18, 1989, now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0120581 |
Oct 1984 |
EPX |
0289216 |
Feb 1988 |
EPX |
63-058451 |
Feb 1988 |
JPX |
1337222 |
Nov 1973 |
GBX |
2032637 |
May 1980 |
GBX |
Non-Patent Literature Citations (1)
Entry |
Patent Abstracts of Japan, vol. 9, No. 40, (P-336) (1763), 1985. |
Continuations (2)
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Number |
Date |
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Parent |
593517 |
Oct 1990 |
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Parent |
339710 |
Apr 1989 |
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