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

Sneha A. Kulkarni; Tom Baikie; Pablo P. Boix; Natalia Yantara; Nripan Mathews; Subodh Mhaisalkar

doi:10.1039/c4ta00435c

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

Sneha A. Kulkarni^*, Tom Baikie, Pablo P. Boix, Natalia Yantara, Nripan Mathews, Subodh Mhaisalkar

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

543 Citations (Scopus)

Abstract

Band-gap tuning of mixed anion lead halide perovskites (MAPb(I _1-xBr_x)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.

Original language	English
Pages (from-to)	9221-9225
Number of pages	5
Journal	Journal of Materials Chemistry A
Volume	2
Issue number	24
DOIs	https://doi.org/10.1039/c4ta00435c
Publication status	Published - Jun 28 2014
Externally published	Yes

ASJC Scopus Subject Areas

General Chemistry
Renewable Energy, Sustainability and the Environment
General Materials Science

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This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1039/c4ta00435c

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abstract = "Band-gap tuning of mixed anion lead halide perovskites (MAPb(I 1-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.",

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AU - Kulkarni, Sneha A.

AU - Baikie, Tom

AU - Boix, Pablo P.

AU - Yantara, Natalia

AU - Mathews, Nripan

AU - Mhaisalkar, Subodh

PY - 2014/6/28

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N2 - Band-gap tuning of mixed anion lead halide perovskites (MAPb(I 1-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.

AB - Band-gap tuning of mixed anion lead halide perovskites (MAPb(I 1-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.

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

Abstract

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