Mixed-cation chiral perovskites displaying warm-white circularly polarized luminescence  

作　　者：Hua-Li Liu Hua-Yang Ru Meng-En Sun Zhao-Yang Wang Shuang-Quan Zang 

机构地区：[1]Henan Key Laboratory of Crystalline Molecular Functional Materials,Henan International Joint Laboratory of Tumor Theranostical Cluster Materials,Green Catalysis Center,and College of Chemistry,Zhengzhou University,Zhengzhou 450001,China

出　　处：《Science China Chemistry》2023年第5期1425-1434,共10页中国科学（化学英文版）

基　　金：supported by the National Key R&D Program of China(2021YFA1200301);the National Natural Science Foundation of China(92061201,21825106);Zhengzhou University。

摘　　要：Chiral perovskites with exceptional structural flexibility and optoelectrical properties are regarded as promising materials for optoelectronic and spintronic devices.However,the effects of achiral organic ligands on the chiroptical activity of chiral perovskites have been rarely explored.Here,we present four one-dimensional lead bromide perovskites R-/S-(AMP)_(2)Pb_(3)Br_(10)(1-R and 1-S)with mono-cation and R-/S-AMP(DMA)Pb Br_(5)(2-R and 2-S)with mixed-cation templated by chiral R-/S-2-aminomethylpyrrolidine(R-/S-AMP)and achiral dimethylammonium(DMA).All four compounds demonstrate broadband emissions from self-trapped excitons(STEs).Derived from the stronger chirality transfer synergistically induced by achiral DMA,amplified bathochromically-shifted circular dichroism signals and strong warm-white circularly polarized emissions have been observed in 2-R and 2-S.This mixed-cation structural engineering provides a new route toward developing chiral perovskites for optoelectronic applications.

关 键 词：chiral perovskites achiral cations chirality transfer circular dichroism circularly polarized luminescence 

分 类 号：TB34[一般工业技术—材料科学与工程]