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Updated: Feb 27, 2026
08:12
Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
10.2K
[(CH3)3PCH2OH][CdBr3] is a perovskite-type ferroelastic compound above room temperature
Xuan Zheng1, Lin Zhou, Ping-Ping Shi
1Ordered Matter Science Research Center, Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics, Southeast University, Nanjing 211189, People's Republic of China. yeqiong@seu.edu.cn dawei@seu.edu.cn.
Chemical Communications (Cambridge, England)
|June 27, 2017
Summary
A novel perovskite compound, [(CH3)3PCH2OH][CdBr3], undergoes a ferroelastic phase transition at 339 K. This transition is driven by cation reorientation and ion displacement within the crystal structure.
Area of Science:
- Solid-state chemistry
- Materials science
- Crystallography
Background:
- Perovskite-type compounds are known for diverse structural and functional properties.
- Understanding phase transitions in these materials is crucial for their technological applications.
Purpose of the Study:
- To investigate the ferroelastic phase transition in the organic-inorganic perovskite compound [(CH3)3PCH2OH][CdBr3].
- To elucidate the structural origins of this phase transition.
Main Methods:
- Crystallographic analysis to observe and analyze domain structures.
- Temperature-dependent studies to identify the phase transition point.
Main Results:
- The compound [(CH3)3PCH2OH][CdBr3] exhibits a ferroelastic phase transition at 339 K.
- Domain structures associated with the phase transition were successfully observed and analyzed.
- The transition is linked to the dynamic behavior of [(CH3)3PCH2OH]+ cations and the displacement of Cd2+ and Br- ions.
Conclusions:
- The ferroelastic phase transition in [(CH3)3PCH2OH][CdBr3] is confirmed at 339 K.
- The cation reorientation and ion displacement are identified as the primary mechanisms driving the phase transition in this perovskite material.
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