B-site ion regulation strategy enables performance optimization and multifunctional integration of hybrid perovskite ferroelectrics  

作　　者：Hao-Fei Ni Jia-He Lin Gele Teri Qiang-Qiang Jia Pei-Zhi Huang Hai-Feng Lu Chang-Feng Wang Zhi-Xu Zhang Da-Wei Fu Yi Zhang 

机构地区：[1]Institute for Science and Applications of Molecular Ferroelectrics,Key Laboratory of the Ministry of Education for Advanced Catalysis Materials,Zhejiang Normal University,Jinhua 321004,China

出　　处：《Chinese Chemical Letters》2025年第3期555-559,共5页中国化学快报(英文版)

基　　金：financially supported by the National Natural Science Foundation of China(Nos.22375182,92056112 and 21991141).

摘　　要：The performance optimization of materials is an eternal theme and challenge in scientific research,which is reflected in ferroelectric filed to two hot topics of enhancing Curie temperature(TC)and functional versatility.The former one vitally determines ferroelectric operational temperature range while the latter would open up new application possibilities.Effective chemical modification or doping strategies on A-site and X-site components have been successfully developed in hybrid organic-inorganic perovskite(HOIP)ferroelectrics,however,the important role of adjusting B-site ions has long been overlooked.Here,we have implemented regulation on the ion radius of the B-site component to successfully obtain two new HOIP ferroelectrics(3-pyrrolinium)BBr_(3)(B=Mn and Ni).Compared to parent(3-pyrrolinium)CdBr_(3),the TC(△T=99 K)was significantly optimized by replacing the Cd^(2+)with smaller Mn^(2+)or Ni^(2+)ions.More strikingly,the introduction of Mn^(2+)and Ni^(2+)ions with octahedral coordination bring out intriguing red emission and magnetism respectively,making the multifunctional integration in a single material for multiple uses.This work provides a feasible strategy for performance optimizing of HOIP ferroelectrics,and would shed light for constructing multifunctional ferroelectrics.

关 键 词：FERROELECTRIC Hybrid perovskites Crystal engineering Curie temperature Phase transition 

分 类 号：O469[理学—凝聚态物理]