Affiliation:
1. Key Laboratory of Bioorganic Phosphorus Chemistry & Chemical Biology (Ministry of Education) Department of Chemistry Tsinghua University Beijing 100084 P. R. China
Abstract
AbstractThe lead‐free hybrid perovskite piezoelectrics possess advantages of easy processing, light weight, and low‐toxicity over inorganic ceramics. However, the lack of understanding in structure–property relationships hinders exploration of new molecular piezoelectric crystals with excellent performances. Herein, by introducing chiral α‐phenylethylammonium (α‐PEA+) cations into bismuth‐based hybrid halides, centimeter‐sized (R‐α‐PEA)4Bi2I10 and (S‐α‐PEA)4Bi2I10 single crystals with a superior piezoelectric voltage coefficient g22 of 309 mV m N−1, are obtained. Structural rigidity in crystals leads to a remarkable electrostrictive coefficient Q22 of 25.8 m4 C−2, nearly 20 times higher than that of poly(vinylidene fluoride) (PVDF), which is beneficial to improve piezoelectricity with the synergistic effect of chirality. Moreover, the as‐grown crystals show outstanding phase stability from 173 K to ≈470 K. This work suggests a design strategy based on rigidity and chirality to exploit novel piezoelectrics among hybrid metal halides.
Funder
National Natural Science Foundation of China
Subject
Biomaterials,Biotechnology,General Materials Science,General Chemistry
Cited by
4 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献