Enantiomeric perovskite with a dual phase transition at high temperature,Journal of Materials Chemistry C

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Enantiomeric perovskite with a dual phase transition at high temperature
Journal of Materials Chemistry C ( IF 5.7 ) Pub Date : 2021-1-4 , DOI: 10.1039/d0tc05380e
Hang Peng _{1,

2,

3,

4} , Hao Cheng _{1,

2,

3,

4} , Yu-Hua Liu _{1,

2,

3,

4} , Meng-Juan Yang _{1,

2,

3,

4} , Wei-Qiang Liao _{1,

2,

3,

4} , Yong Ai _{1,

2,

3,

4}

Affiliation

Temperature-dependent physical switching materials have been of wide concern for materials chemists. Among them, switchable dielectric perovskite materials have shown huge application potential in the fields of sensing, information storage, and electronics. In particular, for better practical application, obtaining dual-phase-change switching materials with a high phase transition temperature (T_c) is still a worthwhile issue to study. In this work, we synthesized chiral hybrid organic inorganic perovskites, namely, (R)-, (S)- and (rac)-N,N-dimethyl-3-fluoropyrrolidinium (DMFP) CdCl₃. The enantiomeric compound undergoes a dual phase transition with a T_c of 460 K and 367 K. T_c significantly increased by 28 K from 411 K of (N,N-dimethyl pyrrolidinium) (DMP) CdCl₃ to 439 K of (rac)-DMFP CdCl₃. Besides, (R) and (S)-DMFP CdCl₃ are the first example of chiral perovskites that show dual T_c with robust switching dielectric characteristics. This work could be a pathway for designing multifunctional chiral perovskite-type switchable materials.

中文翻译：

高温下具有双相变的对映体钙钛矿

与温度有关的物理开关材料已成为材料化学家广泛关注的问题。其中，可切换介电钙钛矿材料在传感，信息存储和电子领域具有巨大的应用潜力。特别地，为了更好的实际应用，获得具有高相变温度（T _c）的双相变开关材料仍然是值得研究的问题。在这项工作中，我们合成了手性杂化有机无机钙钛矿，即（R）-，（S）-和（rac）-N，N-二甲基-3-氟吡咯烷鎓（DMFP）CdCl ₃。的对映体化合物经过与双相位转变Ť _Ç 460 K和367 K的Ť _Ç从411的K（显著增加了28ķ Ñ，ñ -二甲基吡咯烷鎓）（DMP）的CdCl ₃到439的K（外消旋） -DMFP CdCl ₃。此外，（R）和（S）-DMFP CdCl ₃是手性钙钛矿的第一个例子，其显示出具有稳定的开关介电特性的双重T _c。这项工作可能是设计多功能手性钙钛矿型可转换材料的途径。

更新日期：2021-01-18

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