Two enantiomeric perovskite ferroelectrics with a high T-c raised by inserting intermolecular hydrogen bonds
authors Ye, H; Hu, WH; Xu, WJ; Zeng, Y; Chen, XX; Huang, RK; Zhang, WX; Chen, XM
nationality International
abstract Molecular ferroelectrics have promising potential as next-generation flexible electronic materials by the advantage of flexibility, structural tunability, and easy processability. However, an obstacle in expanding their promising applications is effectively raising the ferroelectric transition temperature (T-c) necessary for practical applications, especially under high-temperature operating conditions. Herein, taking the advantage of a hydroxyl group that could form stronger hydrogen bonds to insert/tune host-guest and guest-guest interactions, we employed the 3-hydroxypyrrolidine cation to construct two new enantiomeric hexagonal perovskite ferroelectrics, (R)-3-OH-(C4H9N)[CdCl3] and (S)-3-OH-(C4H9N)[CdCl3]. Both of them undergo a ferroelectric phase transition from C222(1) to P2(1) with a high T-c of 350 K, which is 110 K and 47 K higher than that of their parent compound (C4H10N)[CdCl3] (240 K) and F-substituted analogues (R/S)-3-F-(C4H9N)[CdCl3] (303 K), respectively. These findings well demonstrate that, besides the F-substitution strategy, an OH-substitution strategy provides an important and practical way in designing high-T-c ferroelectrics.
issn 2166-532X
year published 2021
volume 9
issue 3
digital object identifier (doi) 10.1063/5.0035793
web of science category 7
subject category Nanoscience & Nanotechnology; Materials Science, Multidisciplinary; Physics, Applied
unique article identifier WOS:000631016100002
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journal impact factor 3.819
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