Tuning ferroelectric phase transition temperature by enantiomer fraction

Chang-Chun Fan, Cheng-Dong Liu, Bei-Dou Liang, Wei Wang, Ming-Liang Jin, Chao-Yang Chai, Chang-Qing Jing, Tong-Yu Ju, Xiang-Bin Han () and Wen Zhang ()
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Chang-Chun Fan: Southeast University
Cheng-Dong Liu: Southeast University
Bei-Dou Liang: Southeast University
Wei Wang: Southeast University
Ming-Liang Jin: Southeast University
Chao-Yang Chai: Southeast University
Chang-Qing Jing: Southeast University
Tong-Yu Ju: Southeast University
Xiang-Bin Han: Southeast University
Wen Zhang: Southeast University

Nature Communications, 2024, vol. 15, issue 1, 1-9

Abstract: Abstract Tuning phase transition temperature is one of the central issues in phase transition materials. Herein, we report a case study of using enantiomer fraction engineering as a promising strategy to tune the Curie temperature (TC) and related properties of ferroelectrics. A series of metal-halide perovskite ferroelectrics (S−3AMP)x(R−3AMP)1−xPbBr4 was synthesized where 3AMP is the 3-(aminomethyl)piperidine divalent cation and enantiomer fraction x varies between 0 and 1 (0 and 1 = enantiomers; 0.5 = racemate). With the change of the enantiomer fraction, the TC, second-harmonic generation intensity, degree of circular polarization of photoluminescence, and photoluminescence intensity of the materials have been tuned. Particularly, when x = 0.70 − 1, a continuously linear tuning of the TC is achieved, showing a tunable temperature range of about 73 K. This strategy provides an effective means and insights for regulating the phase transition temperature and chiroptical properties of functional materials.

Date: 2024
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DOI: 10.1038/s41467-024-45986-6

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