The photocurrent-voltage characteristics of the heterojunction combination n-Si/SnO2/redox-electrolyte

A model for Schottky barrier-like heterojunction photoelectrodes is presented. This model allows the calculation of the current-voltage curves for such electrodes under different conditions of illumination and electrochemical charge transfer. SnO2-coated n-type Si electrodes in contact with the redo...

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Bibliographic Details
Published in:Journal of the Electrochemical Society 1983-11, Vol.130 (11), p.2173-2179
Main Authors: DECKER, F, FRACASTORO-DECKER, M, BADAWY, W, DOBLHOFER, K, GERISCHER, H
Format: Article
Language:English
Subjects:
Applied sciences
Energy
Exact sciences and technology
Natural energy
Solar energy
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Summary:A model for Schottky barrier-like heterojunction photoelectrodes is presented. This model allows the calculation of the current-voltage curves for such electrodes under different conditions of illumination and electrochemical charge transfer. SnO2-coated n-type Si electrodes in contact with the redox systems K3/K4 Fe (CN)6 and Cl2Cl(-) show experimental photocurrent-voltage curves with the behavior predicted by the model. The effect of the charge transfer overvoltage and the expected current limitation due to photon control and/or redox ion diffusion are demonstrated. The feasibility of solar energy conversion through photoelectrolysis, by means of cells based on heterojunction photoelectrodes, is discussed.
ISSN:0013-4651
1945-7111
DOI:10.1149/1.2119547