Scientists design lead-free 2T all-perovskite tandem solar cell with potential 28.22% efficiency

The proposed tandem features a wide bandgap antimony-doped Cs2AgBiBr6 (specifically Cs2AgBi0. 75Sb0. 25Br6) top cell and a narrow bandgap formamidinium tin iodide (FASnI3) bottom device. Researchers at the University of Babylon in Iraq have simulated a novel two-terminal (2T) lead-free all-perovskite tandem solar cell with a wide bandgap antimony-doped perovskite top subcell and a narrow bandgap formamidinium tin iodide bottom subcell, finding a potential power conversion efficiency of 28. 22%. "Our research involved the numerical simulation of a novel, two-terminal (2T) all-perovskite lead-free ...

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