中国化学快报(英文版)2024，Vol.35Issue(6) ：176-179.DOI:10.1016/j.cclet.2023.108707

Lead-free hybrid two-dimensional double perovskite with switchable dielectric phase transition

Tian Yang Yi Liu Lina Hua Yaoyao Chen Wuqian Guo Haojie Xu Xi Zeng Changhao Gao Wenjing Li Junhua Luo Zhihua Sun
中国化学快报(英文版)2024，Vol.35Issue(6) ：176-179.DOI:10.1016/j.cclet.2023.108707
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Lead-free hybrid two-dimensional double perovskite with switchable dielectric phase transition

Tian Yang 1Yi Liu 2Lina Hua 1Yaoyao Chen 1Wuqian Guo 2Haojie Xu 2Xi Zeng 2Changhao Gao 1Wenjing Li 2Junhua Luo 1Zhihua Sun1
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作者信息

  • 1. College of Chemistry,Fuzhou University,Fuzhou 350108,China;State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
  • 2. State Key Laboratory of Structural Chemistry,Fujian Institute of Research on the Structure of Matter,Chinese Academy of Sciences,Fuzhou 350002,China
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Abstract

Molecular dielectric switches constitute a type of intelligent materials that are highly coveted for their distinctive advantages of switchable dielectric responses,lightweight,and mechanical flexibility.Two-dimensional(2D)hybrid perovskites have demonstrated excellent promise for assembling dielectric switches,in which the dynamic motions of organic moieties afford driving force to trigger switchable dielectric phase transition.Here,we successfully assembled a new lead-free hybrid double perovskite,(CHA)4CuBiBr8(1,CHA=cyclohexylammonium),adopting a typical 2D structural motif,which shows di-electric anisotropy and bistable behaviors during the reversible phase transition near Tc=378K(the Curie temperature).That is,its dielectric constants could be switched and tuned between high-dielectric and low-dielectric states.Structure analyses reveal that the ordered-disordered transformation of the organic CHA+moiety and distortion of inorganic framework account for its phase transition.This result will stim-ulate further exploration of molecular dielectric switches in this 2D environmentally friendly family.

Key words

Dielectric switch/Lead-free/Double perovskite/Phase transition/Symmetry breaking

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基金项目

National Natural science Foundation of China(22125110)

National Natural science Foundation of China(22205233)

National Natural science Foundation of China(22193042)

National Natural science Foundation of China(21833010)

National Natural science Foundation of China(21921001)

National Natural science Foundation of China(U21A2069)

Key Research Program of Frontier Sciences of the Chinese Academy of Sciences(ZDBS-LY-SLH024)

National Postdoctoral Program for Innovative Talents(BX2021315)

National Key Research and Development Program of China(2019YFA0210402)

China Postdoctoral Science Fund(2022TQ0337)

Fujian Science & Technology Innovation Laboratory for Optoelectronic Information of China(2021ZR126)

出版年

2024
中国化学快报(英文版)
中国化学会

中国化学快报(英文版)

CSTPCDCSCD
影响因子：0.771
ISSN：1001-8417
参考文献量48
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