Stable N-CuInSe.sub.2 /iodide-iodine photoelectrochemical cell

Details Stable N-CuInSe.sub.2 /iodide-iodine photoelectrochemical cell Stable N-CuInSe.sub.2 /iodide-iodine photoelectrochemical cell

1984-09-20

1985-12-17

Weisstuch, Aaron

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to light

204290R, 427 74, H01M 636

Patent

active

045592829

ABSTRACT:
In a photoelectrochemical solar cell, stable output and solar efficiency in excess of 10% are achieved with a photoanode of n-CuInSe.sub.2 electrode material and an iodine/iodide redox couple used in a liquid electrolyte. The photoanode is prepared by treating the electrode material by chemical etching, for example in Br.sub.2 /MeOH; heating the etched electrode material in air or oxygen; depositing a surface film coating of indium on the electrode material after the initial heating; and thereafter again heating the electrode material in air or oxygen to oxidize the indium. The electrolyte is treated by the addition of Cu.sup.+ or Cu.sup.2+ salts and In.sup.3+ salts.

REFERENCES:
patent: 4180625 (1979-12-01), Wagner
patent: 4386142 (1983-05-01), Hodes et al.
patent: 4388382 (1983-06-01), Bachmann et al.
K. J. Bachmann et al., Surface Science, vol. 138, pp. 475-487, (1984).
S. Menezes, Appl. Phys. Lett., vol. 45, pp. 148-149, (1984).

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