標題: | UV-Visible Light-Trapping Structure of Loosely Packed Submicrometer Silica Sphere for Amorphous Silicon Solar Cells |
作者: | Huang, Wen-Hsien Shieh, Jia-Min Pan, Fu-Ming Shen, Chang-Hong Lien, Yu-Chung Tsai, Min-An Kuo, Hao-Chung Dai, Bau-Tong Yang, Fu-Liang 材料科學與工程學系 光電工程學系 Department of Materials Science and Engineering Department of Photonics |
關鍵字: | Omnidirectional reflector;photoresponse;silica sphere;UV-visible |
公開日期: | 1-七月-2012 |
摘要: | We synthesized a loosely packed submicrometer silica-sphere (LPSS) monolayer at room temperature and used the LPSS monolayer as the frontside light-trapping structure for n-i-p-type amorphous Si (a-Si) solar cells (SCs) to improve photovoltaic characteristics of the cells. The frontside LPSS monolayer plays a role as a UV-visible light scatter and a broadband antireflector; both can greatly improve the photoresponse of the underneath a-Si adsorbed layer. When the filling density of the LPSS layer is optimized to 65%, the enhancement in the photocurrent and conversion efficiency of the 120 degrees C-fabricated SCs is as high as similar to 15% and similar to 6.9%, respectively. Accordingly, such an LPSS light-trapping structure boosts efficiency of 120 degrees C- and 140 degrees C-fabricated cells to 7.3% and 8.5%, respectively. Since the LPSS structure has a graded refractive index profile, it behaves like a nearly omnidirectional antireflector, enhancing solar efficiency at a very large incident angle of illumination. |
URI: | http://hdl.handle.net/11536/16444 |
ISSN: | 0741-3106 |
期刊: | IEEE ELECTRON DEVICE LETTERS |
Volume: | 33 |
Issue: | 7 |
結束頁: | 1036 |
顯示於類別: | 期刊論文 |