多晶光电化学电极的内部短路电流

本文提出多晶光电化学电极中存在暗区短路电流的概念及其测试方法,并用模拟电极体系及实际多晶电极加以验证。实验结果表明:暗区短路电流的大小随电极的制造工艺而不同。由此可见,存在暗区短路电流是多晶光电化学电极开路电压和输出电流较单晶为低的原因之一,因此,制备多晶电极时应注意使电极致密、孔隙度小。

THE SHORT-CIRCUIT CUR RENT IN THE INNER LAYERS OF POLY CRYSTALLINE PHOTOELECTROCHEMICAL ELECTRODESTH

The existence of short-circuit current in the inner layers of poly-crystalline photoelectrochemical electrodes was postulated.Principle and experimental method for the measurement of such current ("dark current") were laid out and tested with simulated electrode system and actual polycrystalline photoelectrochemical electrodes.It was found that both open-circuit voltage and output characteristics of photoelectrodes are affected by dark current,whose magnitude depends heavily on the method of electrode fabrication.So it seems proper to suggest that polycrystalline photoelectrochemical electrodes should be made as compact as possible.