Bertoluzzi Luca, Badia-Bou Laura, Fabregat-Santiago Francisco, Gimenez Sixto, Bisquert Juan
Photovoltaics and Optoelectronic Devices Group, Departament de Fı́sica, Universitat Jaume I, 12071 Castelló, Spain.
J Phys Chem Lett. 2013 Apr 18;4(8):1334-9. doi: 10.1021/jz400573t. Epub 2013 Apr 9.
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.
提出了一个简单模型，可用于解释通过实验获得的具有表面态的光活性半导体或用于从阳光生产燃料的催化剂的循环伏安图。当系统受限于来自陷阱/催化剂层的电荷转移和去俘获时，结果表明仅可观察到一个电容峰，且在反向电压扫描中不可恢复。如果系统仅受限于电荷转移而不受去俘获限制，则在阴极和阳极方向可观察到两个对称的电容峰。该模型似乎是快速分析限制燃料生产的电子过程的有用工具。
