| (19) |
 |
|
(11) |
EP 0 340 523 A3 |
| (12) |
EUROPEAN PATENT APPLICATION |
| (88) |
Date of publication A3: |
|
23.10.1991 Bulletin 1991/43 |
| (43) |
Date of publication A2: |
|
08.11.1989 Bulletin 1989/45 |
| (22) |
Date of filing: 18.04.1989 |
|
| (51) |
International Patent Classification (IPC)4: G03G 5/14 |
|
| (84) |
Designated Contracting States: |
|
DE FR GB IT |
| (30) |
Priority: |
19.04.1988 JP 96144/88
|
| (71) |
Applicant: MITSUBISHI KASEI CORPORATION |
|
Tokyo 100 (JP) |
|
| (72) |
Inventor: |
|
- Otsuka, Shigenori
Omiya-shi
Saitama-ken (JP)
|
| (74) |
Representative: TER MEER - MÜLLER - STEINMEISTER & PARTNER |
|
Mauerkircherstrasse 45
81679 München
81679 München (DE) |
|
| |
|
| (54) |
Electrophotographic photoreceptor |
(57) According to the present invention, there is provided 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 a value
n is not greater than 0.5 in the following equation (1):
η = η₀ E
n (1)
where η represents a quantum yield as the whole photoreceptor, E represents an electric
field and η₀ represents a constant, and that a film thickness of said charge transporting
layer is not less than 30 µm.