期刊
SOLAR ENERGY MATERIALS AND SOLAR CELLS
卷 182, 期 -, 页码 348-353出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.solmat.2018.03.037
关键词
III-V solar cell; Selective rear contact; Ga0.5In0.5P- and GaAs- base; Double-junction cell
资金
- National Research Foundation of Korea [NRF: 2016R1A2B4012938]
The light management strategy was applied in III-V solar cells for the maximum utilization of incident photon, namely the selective rear contact was adopted in Ga0.5In0.5P- and GaAs- based solar cells. By etching the rear contact layer (p-GaAs) with photolithography, the distinctive morphological structures consisting of polka-dot patterns were formed, which led to increased reflection and thereby the device performance. Furthermore, the photolithography was controlled to find the optimum contact ratio between the back-surface field and the rear contact. Consequently, the conversion efficiency was increased from n = 15.5% to 16.3% for the Ga0.5In0.5P-based single-junction solar cell, and from n = 21.1% to 21.9% for the GaAs-based one, both at the contact ratio of 10%, compared to the cells with full (100%) rear contact ratio. Finally, the selective rear contact was applied to double junction solar cells (Ga0.5In0.5P- and GaAs- based), exhibiting that this straightforward rear-contact strategy has enabled reaching the efficiency of n = 30.6% with an anti-reflective coating.
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