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Issue 24, 2014
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Band-gap tuning of lead halide perovskites using a sequential deposition process

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Abstract

Band-gap tuning of mixed anion lead halide perovskites (MAPb(I1−xBrx)2 (0 ≤ x ≤ 1)) has been demonstrated by means of a sequential deposition process. The optical properties of perovskite hybrids can be flexibly modified by changing (mixing) the concentration of halogen precursors. The concentrations of precursor solution as well as the conversion time play an important role in determining the band-gap of perovskites. A systematic shift of the absorption band edge to shorter wavelengths is observed with increasing Br content in the perovskite films, which results in the decrement of the photocurrent. Nanorod like morphological features are also observed for perovskite films with an iodide to bromide molar ratio of <0.7.

Graphical abstract: Band-gap tuning of lead halide perovskites using a sequential deposition process

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Publication details

The article was received on 23 Jan 2014, accepted on 05 Mar 2014 and first published on 05 Mar 2014


Article type: Paper
DOI: 10.1039/C4TA00435C
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Citation: J. Mater. Chem. A, 2014,2, 9221-9225
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    Band-gap tuning of lead halide perovskites using a sequential deposition process

    S. A. Kulkarni, T. Baikie, P. P. Boix, N. Yantara, N. Mathews and S. Mhaisalkar, J. Mater. Chem. A, 2014, 2, 9221
    DOI: 10.1039/C4TA00435C

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