Factors influencing output stability of Cd-chalcogenide/polysulfide photoelectrochemical cells

Gary Hodes; Joost Manassen; David Cahen

doi:10.1016/0165-1633(81)90014-9

Factors influencing output stability of Cd-chalcogenide/polysulfide photoelectrochemical cells

Gary Hodes
, Joost Manassen
, David Cahen

Research output: Contribution to journal › Article › peer-review

25 Scopus citations

Abstract

The stability of CdSe and CdS photoanodes in polysulfide electrolytes has been investigated. Both CdSe and CdS were found to deactivate to a similar extent, indicating that this deactivation was due to a physical change (reduction of crystallinity) at the semiconductor surface rather than a chemical change. The real surface area of the photoelectrodes was shown to be of great importance in determining the degree of stability, due to its influence on the real photocurrent density. The ratio of [S] to [S^2-] in the electrolyte was likewise shown to have a very strong influence on the stability, and was correlated with the rate of dissolution of photogenerated sulfur away from the semiconductor surface which is the rate determining step under most conditions. Finally, the results of long-term lifetime tests were given, indicating an obtainable stability for CdSe photoanodes measured in years.

Original language	English
Pages (from-to)	373-381
Number of pages	9
Journal	Solar Energy Materials
Volume	4
Issue number	4
DOIs	https://doi.org/10.1016/0165-1633(81)90014-9
State	Published - 1981
Externally published	Yes

Funding

David Cahen thanks Bell Labs. for hospitality during a stay when some of the experiments reported here, were performed. We thank A. Heller, B. Miller and M. Robbins for providing pressed pellet electrodes. This work was supported by the U.S.-Israel Binational Science Foundation, Jerusalem, Israel; and by Ormat Turbines Ltd.

Funders
Ormat Turbines Ltd
U.S.-Israel Binational Science Foundation

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title = "Factors influencing output stability of Cd-chalcogenide/polysulfide photoelectrochemical cells",

abstract = "The stability of CdSe and CdS photoanodes in polysulfide electrolytes has been investigated. Both CdSe and CdS were found to deactivate to a similar extent, indicating that this deactivation was due to a physical change (reduction of crystallinity) at the semiconductor surface rather than a chemical change. The real surface area of the photoelectrodes was shown to be of great importance in determining the degree of stability, due to its influence on the real photocurrent density. The ratio of [S] to [S2-] in the electrolyte was likewise shown to have a very strong influence on the stability, and was correlated with the rate of dissolution of photogenerated sulfur away from the semiconductor surface which is the rate determining step under most conditions. Finally, the results of long-term lifetime tests were given, indicating an obtainable stability for CdSe photoanodes measured in years.",

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year = "1981",

doi = "10.1016/0165-1633(81)90014-9",

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T1 - Factors influencing output stability of Cd-chalcogenide/polysulfide photoelectrochemical cells

AU - Hodes, Gary

AU - Manassen, Joost

AU - Cahen, David

PY - 1981

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N2 - The stability of CdSe and CdS photoanodes in polysulfide electrolytes has been investigated. Both CdSe and CdS were found to deactivate to a similar extent, indicating that this deactivation was due to a physical change (reduction of crystallinity) at the semiconductor surface rather than a chemical change. The real surface area of the photoelectrodes was shown to be of great importance in determining the degree of stability, due to its influence on the real photocurrent density. The ratio of [S] to [S2-] in the electrolyte was likewise shown to have a very strong influence on the stability, and was correlated with the rate of dissolution of photogenerated sulfur away from the semiconductor surface which is the rate determining step under most conditions. Finally, the results of long-term lifetime tests were given, indicating an obtainable stability for CdSe photoanodes measured in years.

AB - The stability of CdSe and CdS photoanodes in polysulfide electrolytes has been investigated. Both CdSe and CdS were found to deactivate to a similar extent, indicating that this deactivation was due to a physical change (reduction of crystallinity) at the semiconductor surface rather than a chemical change. The real surface area of the photoelectrodes was shown to be of great importance in determining the degree of stability, due to its influence on the real photocurrent density. The ratio of [S] to [S2-] in the electrolyte was likewise shown to have a very strong influence on the stability, and was correlated with the rate of dissolution of photogenerated sulfur away from the semiconductor surface which is the rate determining step under most conditions. Finally, the results of long-term lifetime tests were given, indicating an obtainable stability for CdSe photoanodes measured in years.

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Factors influencing output stability of Cd-chalcogenide/polysulfide photoelectrochemical cells

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