Chemistry: electrical current producing apparatus – product – and – Deferred action type – Responsive to light
Patent
1983-06-01
1985-04-16
Weisstuch, Aaron
Chemistry: electrical current producing apparatus, product, and
Deferred action type
Responsive to light
204 371, 204130, 204140, 204192P, 204192S, 204242, 204290R, 204DIG3, 252 623BT, H01M 636, C25B 1110
Patent
active
045116385
ABSTRACT:
A photoresponsive amorphous semiconductor material is modified by incorporating at least one compensating agent selected from a group consisting of hydrogen, lithium, fluorine, beryllium, aluminum, boron, magnesium, other Group I elements, and compounds of these elements. The semiconductor material is cathodically treated either simultaneously with or subsequent to this modification. The semiconductor material may be additionally modified by incorporating a second modifying agent selected from a group consisting of silicon, the transition elements, the lanthanides, and compounds of these elements. The semiconductor material also may be subjected to heat treatment in an inert atmosphere before the cathodic treatment.
A photoanode utilizing the above described semiconductor material further includes a substrate to support a film of said material. The photoanode may additionally include a second semiconductor film having a small band gap inserted between said substrate and said first semiconductor film. These photoanodes may be used in an electrochemical cell for the conversion of light into electrical energy or energy stored in a fuel.
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P. Clechet et al, J. Electrochem. Soc., vol. 130, pp. 1795-1796, (1983).
J. P. Frayret et al, "Electrochimica Acta", vol. 27, pp. 1525-1528, (1982).
M. F. Weber et al, J. Electrochem. Soc., vol. 129, pp. 2022-2028, (1982).
J. J. Cuomo et al, IBM Tech. Disc. Bull., vol. 19, p. 2359, (1976).
Y. Matsumoto et al, J. Electrochem. Soc., vol. 128, pp. 1040-1044, (1981).
K. Rajeshwar et al, Electrochimica Acta, vol. 23, p. 1126, (1978).
Liang Gao
Reichman Benjamin
Sapru Krishna
Energy Conversion Devices Inc.
Norris Lawrence G.
Weisstuch Aaron
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