Electrophotographic photoreceptor

Details Electrophotographic photoreceptor Electrophotographic photoreceptor

1992-11-17

1994-06-28

Goodrow, John

Radiation imagery chemistry: process, composition, or product th

Electric or magnetic imagery, e.g., xerography,...

Radiation-sensitive composition or product

430 58, G03G 5047

Patent

active

053246063

ABSTRACT:
An electrophotographic photoreceptor comprising a conductive substrate having thereon a photosensitive layer as the uppermost layer, in which the photosensitive layer contains two charge transporting materials different in ionization potential, a charge transporting material having a higher ionization potential is present in the amount equimolar to or in an amount less than the equimolar amount to the other charge transporting material having a lower ionization potential. A laminate type electrophotographic photoreceptor comprising a conductive substrate having thereon a charge generating layer and a charge transporting layer, in which the charge generating layer comprises a binder resin and a charge generating material dispersed therein, the charge transporting layer comprises a binder resin and at least two charge transporting materials including a first charge transporting material and a second charge transporting material, the amount of the first charge transporting material is at least 60 wt % based on the total amount of the charge transporting materials, the difference between the highest ionization potential and the lowest ionization potential the charge transporting materials is not more than 0.4 eV, provided that (1) the ionization potentials of all the charge transporting materials are lower than the ionization potential of the charge generating material, or (2) the ionization potential of the first charge transporting material is lower than the ionization potential of the charge generating material, and the ionization potential of the second charge transporting material is higher than the ionization potential of the charge generating material by at least 0.2 eV.

REFERENCES:
patent: 4727009 (1988-02-01), Takai
patent: 4743521 (1988-05-01), Hoffmann et al.
patent: 4933245 (1990-06-01), Akasaki et al.
P. J. Meiz, et al., Photographic Science and Engineering, Mar./Apr. 1977, pp. 73-78.
Atsushi Kakuta, et al., IEEE Transactions on Industry Applications, Jul./Aug. 1981, pp. 382-386.

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