Interpretation of Cyclic Voltammetry Measurements of Thin Semiconductor Films for Solar Fuel Applications

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• 作者：Luca Bertoluzzi ; Laura Badia-Bou ; Francisco Fabregat-Santiago ; Sixto Gimenez ; Juan Bisquert
• 刊名：The Journal of Physical Chemistry Letters
• 出版年：2013
• 出版时间：April 18, 2013
• 年：2013
• 卷：4
• 期：8
• 页码：1334-1339
• 全文大小：377K
• 年卷期：v.4,no.8(April 18, 2013)
• ISSN：1948-7185

文摘

A simple model is proposed that allows interpretation of the cyclic voltammetry diagrams obtained experimentally for photoactive semiconductors with surface states or catalysts used for fuel production from sunlight. When the system is limited by charge transfer from the traps/catalyst layer and by detrapping, it is shown that only one capacitive peak is observable and is not recoverable in the return voltage scan. If the system is limited only by charge transfer and not by detrapping, two symmetric capacitive peaks can be observed in the cathodic and anodic directions. The model appears as a useful tool for the swift analysis of the electronic processes that limit fuel production.

Keywords:

water splitting; charge storage; charge transfer; cyclic voltammetry