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

• DOI: 10.1002/adma.201401991
• Publication Date: 2014-09-11T18:58:39Z
• Authors: Mulmudi Hemant Kumar; Sabba Dharani; Wei Lin Leong; Pablo P. Boix; Rajiv Ramanujam P...; Tom Baikie; Chen Shi; Hong Ding; Ramamoorthy Ramesh; Mark Asta; Michael Graetzel; Subodh G. Mhaisalkar; Nripan Mathews
• Keywords: Free carrier; Modulation (music); Charge carrier

Lead free perovskite solar cells based on a CsSnI3 light absorber with spectral response from 950 nm is demonstrated. The high photocurrents noted in the system are consequence of SnF2 addition which reduces defect concentrations and hence background charge carrier density.