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Proceedings Paper

The design of back surface field layer for a single GaAs solar cell
Author(s): Yankai Xiong; Kemin Tang; Minghui Song; Chao Feng; Yuqin Sun; Chenhui Yu; Zhihao Wu; Hui Xiong; Changqing Chen
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Paper 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.

Paper Details

Date Published: 12 October 2009
PDF: 6 pages
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
Show Author Affiliations
Yankai Xiong, Huazhong Univ. of Science and Technology (China)
Kemin Tang, Hebei Semiconductor Research Institute (China)
Minghui Song, Huazhong Univ. of Science and Technology (China)
Chao Feng, Huazhong Univ. of Science and Technology (China)
Yuqin Sun, Huazhong Univ. of Science and Technology (China)
Chenhui Yu, Huazhong Univ. of Science and Technology (China)
Zhihao Wu, Huazhong Univ. of Science and Technology (China)
Hui Xiong, Huazhong Univ. of Science and Technology (China)
Changqing Chen, Huazhong Univ. of Science and Technology (China)


Published in SPIE Proceedings Vol. 7518:
Photonics and Optoelectronics Meetings (POEM) 2009: Solar Cells, Solid State Lighting, and Information Display Technologies
Michael Grätzel; Hiroshi Amano; Chin Hsin Chen; Changqing Chen; Peng Wang, Editor(s)

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