Robust Tin‐Based Perovskite Solar Cells with Hybrid Organic Cations to Attain Efficiency Approaching 10%

  title={Robust Tin‐Based Perovskite Solar Cells with Hybrid Organic Cations to Attain Efficiency Approaching 10\%},
  author={Efat Jokar and Cheng-Hsun Chien and Cheng-Min Tsai and Amir Fathi and Eric Wei‐Guang Diau},
  journal={Advanced Materials},
The stability of a tin‐based perovskite solar cell is a major challenge. Here, hybrid tin‐based perovskite solar cells in a new series that incorporate a nonpolar organic cation, guanidinium (GA+), in varied proportions into the formamidinium (FA+) tin triiodide perovskite (FASnI3) crystal structure in the presence of 1% ethylenediammonium diiodide (EDAI2) as an additive, are reported. The device performance is optimized at a precursor ratio (GAI:FAI) of 20:80 to attain a power conversion… 

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