具有钙钛矿结构的分子铁电体研究进展  

Recent progress in molecular ferroelectrics with perovskite structure

作　　者：熊昱安 冯子杰 景政印 潘强 沙泰廷 苗书荣 姚婕[1] 杜国威 游雨蒙 Yu'an Xiong;Zijie Feng;Zhengyin Jing;Qiang Pan;Taiting Sha;Shurong Miao;Jie Yao;Guowei Du;Yumeng You(Jiangsu Key Laboratory for Science and Applications of Molecular Ferroelectrics,Southeast University,Nanjing 211189,China;School of Chemistry and Chemical Engineering,Southeast University,Nanjing 211189,China)

机构地区：[1]东南大学江苏省分子铁电科学与应用重点实验室,南京211189 [2]东南大学化学化工学院,南京211189

出　　处：《科学通报》2020年第10期916-930,共15页Chinese Science Bulletin

基　　金：国家自然科学基金(21925502)资助。

摘　　要：铁电材料是一类重要的功能性材料,由于其特殊的可翻转的自发极化,铁电材料在能源、信息、传感、医学等领域都有着广泛的应用.自20世纪以来,具有钙钛矿结构的铁电材料由于其优异的性质一直活跃在应用的舞台上,而其中应用较为广泛的几乎都是无机钙钛矿材料.近年来,随着科学技术的发展,人们发现了众多具有钙钛矿结构的分子铁电体.这些新型的分子铁电体具有较低的声阻抗、容易进行结构设计和调控、容易实现多种功能特性等优点,有望在柔性电子学、薄膜器件等应用中成为无机钙钛矿铁电材料的有益补充.本文结合分子钙钛矿铁电体的设计思路,对近年来其在压电、能隙调控、光电等功能特性方面取得的进展进行了介绍.Discovered in 1920 by Valasek, a molecular crystal of Rochelle salt(potassium sodium tartrate tetrahydrate) displayed abnormal electrical hysteresis, named as ferroelectric effect. After that, ferroelectrics became an important class of functional materials, due to their unique reversible spontaneous polarization characteristics and other fascinating dielectric,thermoelectric and piezoelectric properties. Although the first reported ferroelectric material is an organic material, the later discovered inorganic materials almost dominated the fields of ferroelectrics for both fundamental studies and practical applications. Among them, inorganic perovskite ceramics received rapid development and showed great application potential in a wide-range of applications such as non-volatile memories, capacitors, sensors, energy convertors, etc., due to their high phase transition temperature and excellent ferroelectric/piezoelectric properties.Comparing to inorganics, molecular materials possess advantages as low acoustic impedance, good flexibility of structure design and composition modification, simple solution synthesis and easy realization of functional properties.Thus, molecular ferroelectrics are expected to be an irreplaceable complement to conventional inorganics, especially in applications like flexible electronics and thin film devices. In the large family of molecular materials, some adapt a similar structure of perovskite with partial substitution of metal ions by organic molecules. These hybrid materials have attracted widespread attention because of their extraordinary optoelectronic and photovoltaic performance. Since last decade, the ferroelectric related properties of molecular perovskite materials were also largely improved. The combination of highly adaptive perovskite structures and variable composition attributes hybrid perovskites them unparalleled potential in rational design of ferroelectricity and piezoelectricity.In this review, we firstly introduced the structural characteristics and dimensionaliti

关 键 词：钙钛矿 分子铁电体 压电 分子设计 

分 类 号：TM221[一般工业技术—材料科学与工程]