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First attempt to build lead-free perovskite-CIGS tandem solar cells

Indian researchers simulated a novel pairing of a CsGeI3 lead-free halide perovskite top cell with a copper-indium-gallium-selenide bottom cell. The resulting tandem device has the potential to achieve a power conversion efficiency of 26.06%Researchers led by a team at Visvesvaraya National Institute of Technology in India have simulated a tandem solar cell based on a lead-free halide perovskite top cell with a wide energy bandgap of 1.6 eV and …
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pv magazine International broke the news in on Monday, August 18, 2025.
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