Analysis for efficiency potential of II–VI compound, chalcopyrite, and kesterite-based tandem solar cells

The development of high-performance solar cells offers a promising pathway toward achieving high power per unit cost for many applications. As single-junction solar cells are limited to 30–32% conversion efficiency under 1-sun, multi-junction or tandem solar cells are expected to contribute to highe...

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Veröffentlicht in:Journal of materials research 2022-01, Vol.37 (2), p.445-456
Hauptverfasser: Yamaguchi, Masafumi, Tampo, Hitoshi, Shibata, Hajime, Schygulla, Patrick, Dimroth, Frank, Kojima, Nobuaki, Ohshita, Yoshio
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Sprache:eng
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Zusammenfassung:The development of high-performance solar cells offers a promising pathway toward achieving high power per unit cost for many applications. As single-junction solar cells are limited to 30–32% conversion efficiency under 1-sun, multi-junction or tandem solar cells are expected to contribute to higher performances. The II–VI compound, chalcopyrite, and kesterite-based tandem solar cells are expected as high-efficiency and low-cost solar cells. This paper presents analytical results for efficiency potential and loss elements of II–VI compound, chalcopyrite, and kesterite-based tandem solar cells. The 2-junction and 3-junction tandem solar cells have potential efficiencies of 36% and 42%, respectively, by improving external radiative efficiency and reducing resistance and optical losses. Some paths for improving efficiencies of tandem solar cells are shown by analyzing their loss elements. Optimization of band-gap energy of sub-cells and photon recycling are also recommended. Graphical abstract
ISSN:0884-2914
2044-5326
DOI:10.1557/s43578-021-00440-x