Improving Crystalline Silicon Solar Cells Efficiency Using Refractive-Index-Matched SiON/ZnO Nanostructures
| Autor: | Jhen-SiangWu, 吳禎祥 |
|---|---|
| Rok vydání: | 2014 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 102 The present thesis is devoted to improve light absorption and efficiency using a ZnO/SiON-based refractive-index-matched (RIM) surface-roughening structure. The ZnO nanowires (NWs) and nanotubes (NTs) were first hydrothermally synthesized on regular solar cells (SCs)as a surface-roughening structure. And a SiON film was deposited on the surface of NTs by PECVD to form a surface roughening structure with a graded refractive index. In the first part of this thesis, an optical simulating software, TracePro, was used to simulate the size effects of nanostructure and SiON/ZnO NTs on light absorption of SC. According to calculated results, it indicates that a RIM structure with a 150-nm-thick SiON film and nanotubes arrays with 100-nm-width and 400-nm-length in size could have the largest improvement in the cell efficiency for about 39.2%. Experimental study is presented in the second part of the thesis. ZnO nanostructures and SiON/ZnO NTs were implemented on regular SCs. Material analysis including surface morphology, components, and photoelectrical properties of the prepared SCs are examined and results are presented and discussed. In summary, the effectiveness of SiON/ZnO NTs RIM structure surface roughening scheme in improving efficiency of SCs has been studied and demonstrated theoretically and experimentally. The proposed RIM structure with a 150-nm-thick SiON film and NTs structure with 100-nm-width and 400-nm-length in size has shown an improvement in the cell efficiency by 39.2% as compared with the regular SC. It is expected that the RIM SiON/ZnO nanotubes structure proposed in the present thesis could be applied for optoelectronics to minimize the Fresnel loss and maximize photoelectric efficiency. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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