Semiconductor liquid junction photocell using surface modified G

Details Semiconductor liquid junction photocell using surface modified G Semiconductor liquid junction photocell using surface modified G

1978-05-18

1980-01-08

Weisstuch, Aaron

Chemistry: electrical current producing apparatus, product, and

Deferred action type

Responsive to light

250211J, 250212, H01M 630, H01M 636

Patent

active

041827961

ABSTRACT:
A semiconductor liquid junction photocell using a photoactive electrode comprising GaAs has greatly improved solar energy to electrically conversion efficiency when compared to prior art semiconductor liquid junction photocells using GaAs electrodes. The improved efficiency is obtained by material, such as ruthenium, cobalt, rhodium or lead, on the electrode surface. Efficiency is still further increased by texturizing the surface of the GaAs electrode prior to addition of the material. Efficiencies under AM1 conditions are approximately 12 percent.

REFERENCES:
Y. Nakato et al., "Photo-Electrochemical Behaviors of Semiconductor Electrodes Coated with Thin Metal Films," Chem. Lett., pp. 883-886 (1975).
S. Gourgaud et al., "Semiconductor/Electrolyte Photoelectric Energy Conversion: The Use of a Molybdenum Oxide Coating to Avoid Corrosion," J. Electrochem. Soc., vol. 124, pp. 102-107 (1977).
H. Yoneyama et al., "Extension of Spectral Response of p-Type GaP Electrodes by Metal Adatoins," J. Electrochem. Soc., vol. 125, pp. 68-74 (1978).
A. B. Ellis et al., "Studies of n-Type GaAs and GaAp Based Photoelectrochemical Cells. Stabilization by Kinetic Control & Conversion of Optical Energy to Electricity," J. Am. Chem. Soc., vol. 99, pp. 2848-2854 (1977).
K. C. Chang et al., "Stable Semiconductor Liquid Junction Cell with 9 Percent Solar-to-Electrical Conversion Efficiency," Science, vol. 196, pp. 1097-1098 (1977).
A. Heller et al., "Spectral Response & Efficiency Relations in Semiconductor _Liquid Junction Solar Cells," J. Electrochem. Soc., vol. 124, pp. 697-700 (1977).
H. Gerischer, "Electrochemical Photo & Solar Cells-Principles & Some Experiments," Electroanalytical Interfacial Electrochem., vol. 58, pp. 263-274 (1975).

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