Study oh Evaluation of Corrosion Behavior of Transparent Electrically Conductive Film

研究了透明导电薄膜、n型氧化物半导体ITO（氧化铟锡）及其与银电对在室温0.3- 20%NaCl溶液中的电化学和光电化学行为。ITO的阳极效应只受光照的影响，光电流随光照强度的增加而增大。阴极光不仅受光照的影响，而且受溶解氧的影响。对于ITO-Ag电偶，ITO为阴极，Ag为阳极。研究发现，在ITO上镀一层具有n型氧化物半导体性质的TiO_2薄膜，可以起到阴极保护作用。

Electrochemical and photo-electrochemical behaviors of ITO (Indium Tin Oxide), which was transparent electrically donductive film and n-type oxide semiconductor, and ITO-Ag couple were investigated in 0.3-20% NaCl solutions at room temperature. Anodic phenomena on ITO were affected only by illumination, and photo current became lager with increasing intensity of illumination light. Cathodic one was affected by not only illumination but also dissolved oxygen. For ITO-Ag couple, ITO was cathobe and Ag anode. So it was difficult to protect Ag with ITO.It was found that TiO2 film, which was also n-type oxide semiconductor, coated on ITO could protect Ag cathodically.