微机化紫外可见区现场光谱电化学联用测量系统的研制

Study of Microcomputer-based Ultraviolet/Visible in situ Spectroelectrochemical Measurement System

本文报道了由微机控制的紫外可见区现场(in situ)光谱电化学联用测量系统的硬件和软件设计。该系统可以测量电化学调制反射光谱,光电流谱和光电容谱,并可实现同一实验体系的同时联合测量,这些功能均由计算机软件完成。该系统已应用于金属、半导体、半导电氧化膜电极/溶液界面行为的研究,得到了一些新的实验结果。

Much valuable in situ information about electrode/electrolyte interfaces can be provided by measuring the optical and electrical responses during optical and electrical perurbation.For this purpose,a combined spectroelectrochemical measurement system,which is controlled by a microcomputer,has been developed in our laboratory for thé simulta- neous perturbation and measttrement of the ultraviolet/visible optical and the electrical responses.A number of spectra,e.g.electrochemically modulated UV/Vis reflectance spectrum, photoeurrent spectum, electrochemical photocapacitance spectrum, etc., as well as other information,can be obtained in one experiment by making use of computer data processing. As application examples,the measured results of n-GaAs and n-CdS electrodes are presented.