Lead‐Free Inverted Planar Formamidinium Tin Triiodide Perovskite Solar Cells Achieving Power Conversion Efficiencies up to 6.22% Article Swipe

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Formamidinium Triiodide Materials science Perovskite (structure) Energy conversion efficiency Tin Optoelectronics Planar Photocurrent Hysteresis Electrode Chemical engineering Dye-sensitized solar cell Engineering Physics Metallurgy Chemistry Physical chemistry Computer science Electrolyte Computer graphics (images) Quantum mechanics

Wei‐Qiang Liao , Dewei Zhao , Yue Yu , Corey R. Grice , Changlei Wang , Alexander J. Cimaroli , Philip Schulz , Weiwei Meng , Kai Zhu , Ren‐Gen Xiong , Yanfa Yan ·

YOU? · · 2016 · Open Access · · DOI: https://doi.org/10.1002/adma.201602992 · OA: W2511864954

Efficient lead (Pb)-free inverted planar formamidinium tin triiodide (FASnI<sub>3</sub> ) perovskite solar cells (PVSCs) are demonstrated. Our FASnI<sub>3</sub> PVSCs achieved average power conversion efficiencies (PCEs) of 5.41% ± 0.46% and a maximum PCE of 6.22% under forward voltage scan. The PVSCs exhibit small photocurrent-voltage hysteresis and high reproducibility. The champion cell shows a steady-state efficiency of ≈6.00% for over 100 s.