標題: | Shape Effect of Silicon Nitride Subwavelength Structure on Reflectance for Silicon Solar Cells |
作者: | Sahoo, Kartika Chandra Li, Yiming Chang, Edward Yi 材料科學與工程學系 電機工程學系 Department of Materials Science and Engineering Department of Electrical and Computer Engineering |
關鍵字: | Antireflection coating (ARC);efficiency;morphological effect;multilayer;reflectance;rigorous coupled-wave approach;shape effect;silicon nitride;subwavelength structure (SWS) |
公開日期: | 1-十月-2010 |
摘要: | In this paper, we, for the first time, examine the spectral reflectivity of hemisphere-, cone-, cylinder-, and parabola-shaped silicon nitride (Si(3)N(4)) subwavelength structures (SWSs). A multilayer rigorous coupled-wave approach is advanced to evaluate the reflection properties of Si(3)N(4) SWSs. We optimize the aforementioned four different shapes of SWSs in terms of effective reflectance over a range of wavelength. The results of our paper show that a lowest effective reflectivity could be achieved for the optimized cone-shaped SWS as compared to hemisphere-, parabola-, and cylinder-shaped structures with the same volume. The best shape SWS is then fabricated together with a silicon (Si) solar cell, and the efficiency of the solar cell is compared with that of a solar cell with single-layer antireflection coating (ARC). An increase of 1.09% in cell efficiency (eta) is observed for the Si solar cell with a cone-shaped Si(3)N(4) SWS (eta = 12.86%) as compared with the cell with single-layer Si(3)N(4) ARCs (eta = 11.77%). |
URI: | http://dx.doi.org/10.1109/TED.2010.2056150 http://hdl.handle.net/11536/32107 |
ISSN: | 0018-9383 |
DOI: | 10.1109/TED.2010.2056150 |
期刊: | IEEE TRANSACTIONS ON ELECTRON DEVICES |
Volume: | 57 |
Issue: | 10 |
起始頁: | 2427 |
結束頁: | 2433 |
顯示於類別: | 期刊論文 |