Lead-free halide perovskite solar cells with high photocurrents realized through vacancy modulation.

@article{Kumar2014LeadfreeHP,
  title={Lead-free halide perovskite solar cells with high photocurrents realized through vacancy modulation.},
  author={Mulmudi Hemant Kumar and Sabba Dharani and Wei Lin Leong and Pablo P Boix and Rajiv Ramanujam Prabhakar and Tom Baikie and Chen Shi and Hong Ding and R. Ram{\'e}sh and Mark Asta and Michael Graetzel and Subodh Mhaisalkar and Nripan Mathews},
  journal={Advanced materials},
  year={2014},
  volume={26 41},
  pages={7122-7}
}
Lead free perovskite solar cells based on a CsSnI3 light absorber with a spectral response from 950 nm is demonstrated. The high photocurrents noted in the system are a consequence of SnF2 addition which reduces defect concentrations and hence the background charge carrier density. 
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