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Fan, Chang-Chun; Liu, Cheng-Dong; Liang, Bei-Dou; Wang, Wei; Jin, Ming-Liang; Chai, Chao-Yang; Jing, Chang-Qing; Ju, Tong-Yu; Han, Xiang-Bin; Zhang, Wen
Nature communications, 02/2024, Letnik: 15, Številka: 1Journal Article
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 (T ) and related properties of ferroelectrics. A series of metal-halide perovskite ferroelectrics (S-3AMP) (R-3AMP) PbBr 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 T , 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 T 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.
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