Lead-free halide perovskite solar cells with high photocurrents realized through vacancy modulation. Kumar, M., H., Dharani, S., Leong, W., L., Boix, P., P., Prabhakar, R., R., Baikie, T., Shi, C., Ding, H., Ramesh, R., Asta, M., Graetzel, M., Mhaisalkar, S., G., & Mathews, N. Advanced Materials, 2014.
Lead-free halide perovskite solar cells with high photocurrents realized through vacancy modulation [pdf]Paper  abstract   bibtex   
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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