A New Approach Using Backside Scatterers for Efficiency Enhancement in Thin Si Solar Cells
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概要
- 論文の詳細を見る
In order to increase the optical path length in thin Si solar cells for the efficiency enhancement, we examined a method to use scatterers of air spheres on the 10 nm scale. The air spheres were randomly embedded on the backside of solar cell to cause the Rayleigh scattering. The incident solar light propagates in the lateral direction after the scattering, increasing the optical path length much longer than the cell thickness. According to the simulations, the light was found to be sufficiently absorbed due to the scattering even for the wavelength over 1100 nm, which is difficult to be absorbed in ordinary thin Si cells. In experiments, air holes in a porous Si layer were examined as the scattering sources, showing the behavior similar to the simulation result. These results suggest that the backside scatterers are useful for the efficiency enhancement in thin Si cells.
- Published by the Japan Society of Applied Physics through the Institute of Pure and Applied Physicsの論文
- 2010-04-25
著者
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Ishikawa Yasuhiko
Department Of Materials Engineering Graduate School Of Engineering The University Of Tokyo
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Kazumi Wada
Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
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Yanai Akihiro
Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
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Ichikawa Ryuzo
Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
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Akihiro Yanai
Department of Materials Engineering, The University of Tokyo, 7-3-1 Hongo, Bunkyo, Tokyo 113-8656, Japan
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