Spectral sensitization of amorphous silicon photoconductive elem

Details Spectral sensitization of amorphous silicon photoconductive elem Spectral sensitization of amorphous silicon photoconductive elem

1987-01-27

1987-12-08

Welsh, J. David

Radiation imagery chemistry: process, composition, or product th

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

Radiation-sensitive composition or product

430 59, 430 66, G03G 509

Patent

active

047118318

ABSTRACT:
Multi-layer photoconductive elements comprising one or more layers of hydrogenated amorphous silicon are provided with sensitizing and supersensitizing layers which function to alter the spectral sensitivity of the element and thereby enhance its usefulness in such applications as photovoltaic devices, thin film electronic devices, and electrophotographic photoreceptors. The sensitizing layer contains a phthalocyanine which serves as a spectral sensitizing agent and the supersensitizing layer contains an arylamine which serves as a chemical sensitizing agent. The sensitizing and supersensitizing layers serve by their conjoint action to inject charge into the hydrogenated amorphous silicon layer in response to photogeneration within the sensitizing layer that is activated by radiation to which the hydrogenated amorphous silicon layer exhibits a lower degree of sensitivity.

REFERENCES:
patent: 4349617 (1982-09-01), Kawashiri et al.
patent: 4461819 (1984-07-01), Nakagawa et al.
patent: 4471039 (1984-09-01), Borsenberger et al.
patent: 4491626 (1985-01-01), Kawamura et al.
patent: 4557989 (1985-12-01), Branston et al.

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