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Share this article SANTA CLARA, Calif., Feb. 17, 2021 /PRNewswire/   In a collaboration between USA based MiaSolé Hi-Tech Corp and European Solliance Solar Research a power conversion efficiency of 26.5% on a tandem solar cell was established. The architecture combines two thin-film solar cell technologies: a top rigid semi-transparent perovskite solar cell with a bottom flexible copper indium gallium selenide (CIGS) cell. This impressive efficiency was achieved by optimizing the bandgap and the efficiency of both the rigid semi-transparent perovskite top cell and the flexible CIGS bottom cell. The CIGS was roll to roll produced on steel foil, with an impressive power conversion efficiency of 20.0%.

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