Issue 24, 2014

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

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

Supplementary files

Article information

Article type
Paper
Submitted
23 Jan 2014
Accepted
05 Mar 2014
First published
05 Mar 2014
This article is Open Access
Creative Commons BY-NC license

J. Mater. Chem. A, 2014,2, 9221-9225

Author version available

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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