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-Oct-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
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