کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1552355 | 998190 | 2006 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: The nature of mobile hydrogen in a-Si:H—Electrochemical studies The nature of mobile hydrogen in a-Si:H—Electrochemical studies](/preview/png/1552355.png)
Electrochemical studies of both the a-Si:H based metal/oxide/semiconductor structures and a-Si:H modified Pt electrode as a part of two-electrode cell compartment with electrolyte were performed to obtain information on the nature of mobile hydrogen in a-Si:H. We assume, that the complex formed by a hydrogen molecule and a silicon dangling bond (the origin of Dh states) provides for mobile hydrogen. Information on the process of electron selfexchange (hopping) in a-Si:H driven by diffusion in the presence of a concentration gradient of redox centers is obtained. The capability of the electrochemical methods for studying the role of hydrogen in degradation of a-Si:H caused by bias annealing and/or illumination is demonstrated. Also, it was shown that because of the unique electrocatalytic features of the a-Si:H modified Pt electrode, the latter can act as a “programmable” and selective sensor of heavy metal ions and/or metal complexes.
Journal: Solar Energy - Volume 80, Issue 6, June 2006, Pages 694–700