Effect of Low Pressure on Tetragonal to Cubic Phase Transition of Methylammonium Lead Iodide Perovskite

Ansuman Halder; Yevgeny Rakita; David Cahen; Shaibal K. Sarkar

doi:10.1021/acs.jpclett.9b03895

Effect of Low Pressure on Tetragonal to Cubic Phase Transition of Methylammonium Lead Iodide Perovskite

Ansuman Halder, Yevgeny Rakita, David Cahen, Shaibal K. Sarkar

Department of Molecular Chemistry and Materials Science Perlman

Weizmann Institute of Science

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

Abstract

The attractive optoelectronic properties of MAPbI₃ (MA = CH₃NH₃), one of the most common halide perovskites, can be complicated by its tetragonal → cubic structural phase transition just above room temperature. We show that decreasing the ambient pressure can move that phase transition by â 40 °C (at â 10^-3 mbar). Our report also includes control experiments, which show that desorption of water or oxygen can be excluded as possible causes for the change in phase transition temperature. On the basis of diffraction data, we postulate that an optimum volume is required to initiate a T → C phase transition. The pressure-induced phase change in effect stabilizes the tetragonal phase for work around room temperature, even if some natural heating occurs.

Original language	English
Pages (from-to)	1473-1476
Number of pages	4
Journal	Journal of Physical Chemistry Letters
Volume	11
Issue number	4
Early online date	30 Jan 2020
DOIs	https://doi.org/10.1021/acs.jpclett.9b03895
State	Published - 20 Feb 2020

All Science Journal Classification (ASJC) codes

General Materials Science
Physical and Theoretical Chemistry

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10.1021/acs.jpclett.9b03895

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abstract = "The attractive optoelectronic properties of MAPbI3 (MA = CH3NH3), one of the most common halide perovskites, can be complicated by its tetragonal → cubic structural phase transition just above room temperature. We show that decreasing the ambient pressure can move that phase transition by {\^a} 40 °C (at {\^a} 10-3 mbar). Our report also includes control experiments, which show that desorption of water or oxygen can be excluded as possible causes for the change in phase transition temperature. On the basis of diffraction data, we postulate that an optimum volume is required to initiate a T → C phase transition. The pressure-induced phase change in effect stabilizes the tetragonal phase for work around room temperature, even if some natural heating occurs.",

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AU - Cahen, David

AU - Sarkar, Shaibal K.

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AB - The attractive optoelectronic properties of MAPbI3 (MA = CH3NH3), one of the most common halide perovskites, can be complicated by its tetragonal → cubic structural phase transition just above room temperature. We show that decreasing the ambient pressure can move that phase transition by â 40 °C (at â 10-3 mbar). Our report also includes control experiments, which show that desorption of water or oxygen can be excluded as possible causes for the change in phase transition temperature. On the basis of diffraction data, we postulate that an optimum volume is required to initiate a T → C phase transition. The pressure-induced phase change in effect stabilizes the tetragonal phase for work around room temperature, even if some natural heating occurs.

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Effect of Low Pressure on Tetragonal to Cubic Phase Transition of Methylammonium Lead Iodide Perovskite

Abstract

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