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

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

doi:10.1002/adma.201401991

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

Adv Mater. 2014 Nov 5;26(41):7122-7. doi: 10.1002/adma.201401991. Epub 2014 Sep 11.

Authors

Mulmudi Hemant Kumar¹, Sabba Dharani, Wei Lin Leong, Pablo P Boix, Rajiv Ramanujam Prabhakar, Tom Baikie, Chen Shi, Hong Ding, Ramamoorthy Ramesh, Mark Asta, Michael Graetzel, Subodh G Mhaisalkar, Nripan Mathews

Affiliation

¹ Energy Research Institute @NTU (ERI@N), Research Techno Plaza, X-Frontier Block, Level 5, 50 Nanyang Drive, Singapore, 637553, Singapore; School of Materials Science and Engineering, Nanyang Technological University, Nanyang Avenue, Singapore, 639798, Singapore.

PMID: 25212785
DOI: 10.1002/adma.201401991

Abstract

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.

Keywords: Cesium tin iodide; high photocurrent; lead free; perovskite solar cells; tin vacancy.