12 October 2009 The design of back surface field layer for a single GaAs solar cell
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Abstract
The inclusion of a back surface field (BSF) can significantly improve the efficiency of GaAs solar cells due to a better collection of photogenerated minority carriers. In this work, the efficiency of a single GaAs solar cell has been optimized by varying the material properties of AlGaAs back surface field layer using an advanced commercial software, Crosslight APSYS simulator. By optimizing the Al composition and width of the back surface field layer, a maximum efficiency 25.660% is obtained when Al composition is 0.25 and the width is 0.3 μm. The band diagrams, 2-dimensional relative energy density profile and I-V curve of the device structure with the optimal back surface field layer are also obtained by APSYS.
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Yankai Xiong, Yankai Xiong, Kemin Tang, Kemin Tang, Minghui Song, Minghui Song, Chao Feng, Chao Feng, Yuqin Sun, Yuqin Sun, Chenhui Yu, Chenhui Yu, Zhihao Wu, Zhihao Wu, Hui Xiong, Hui Xiong, Changqing Chen, Changqing Chen, } "The design of back surface field layer for a single GaAs solar cell", Proc. SPIE 7518, Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies, 751811 (12 October 2009); doi: 10.1117/12.845420; https://doi.org/10.1117/12.845420
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