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タイトル: | Time-resolved photoluminescence measurements for determining voltage-dependent charge-separation efficiencies of subcells in triple-junction solar cells |
著者: | Tex, David M. Ihara, Toshiyuki Akiyama, Hidefumi Imaizumi, Mitsuru Kanemitsu, Yoshihiko https://orcid.org/0000-0002-0788-131X (unconfirmed) |
著者名の別形: | 金光, 義彦 |
発行日: | 5-Jan-2015 |
出版者: | American Institute of Physics |
誌名: | Applied Physics Letters |
巻: | 106 |
号: | 1 |
論文番号: | 013905 |
抄録: | Conventional external quantum-efficiency measurement of solar cells provides charge-collection efficiency for approximate short-circuit conditions. Because this differs from actual operating voltages, the optimization of high-quality tandem solar cells is especially complicated. Here, we propose a contactless method, which allows for the determination of the voltage dependence of charge-collection efficiency for each subcell independently. By investigating the power dependence of photoluminescence decays, charge-separation and recombination-loss time constants are obtained. The upper limit of the charge-collection efficiencies at the operating points is then obtained by applying the uniform field model. This technique may complement electrical characterization of the voltage dependence of charge collection, since subcells are directly accessible. |
著作権等: | Copyright 2015 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. |
URI: | http://hdl.handle.net/2433/192939 |
DOI(出版社版): | 10.1063/1.4905474 |
出現コレクション: | 学術雑誌掲載論文等 |
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