Method for in situ fabrication of photoconductive composite

Details Method for in situ fabrication of photoconductive composite Method for in situ fabrication of photoconductive composite

1975-04-17

1977-04-19

Welsh, John D.

Gas separation: apparatus

Magnetic separating means

252500, 96 16, G03G 504

Patent

active

040186024

ABSTRACT:
Method for in situ preparation of photoconductive composite having an electronically active hole transport layer, an electronically active electron transport layer and a layer of charge transfer complex sandwiched therebetween. According to this method, a film containing either an electron donor or an electron acceptor is initially formed directly on a supportive (preferably conductive) substrate. After this film has been allowed to set, a second film is solvent coated on the previously formed film. The solvent used in preparation of the second film causes softening of the previously formed layer which permits interaction of an electron acceptor or an electronic donor in the casting solvent with an electron acceptor or an electron donor of the previously formed layer, thereby forming a charge transfer complex at the interface of these two films. Only a portion of the donor and acceptor interact along this common boundary during the formation of the photoconductive composite. The balance of the noncomplexed donor and acceptor remain unperturbed in their respective layers, thus providing rapid and efficient transport of both species of charge carriers from within the bulk of the film upon photoactivation of the charge transfer complex.

REFERENCES:
patent: 3287115 (1966-11-01), Hoegl
patent: 3634336 (1972-01-01), Perez-Albuerne
patent: 3814600 (1974-06-01), Contois

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