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Lead‐Free Halide Perovskite Solar Cells with High Photocurrents Realized Through Vacancy Modulation

2014; Volume: 26; Issue: 41 Linguagem: Inglês

10.1002/adma.201401991

1521-4095

Mulmudi Hemant Kumar, Dharani Sabba, Wei Lin Leong, Pablo P. Boix, Rajiv Ramanujam Prabhakar, Tom Baikie, Shi Chen, Hong Ding, R. Ramesh, Mark Asta, Michael Gräetzel, Subodh G. Mhaisalkar, Nripan Mathews,

Chalcogenide Semiconductor Thin Films

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.