Alloying n-Butylamine into CsPbBr3 To Give a Two-Dimensional Bilayered Perovskite Ferroelectric Material

Angewandte Chemie
Zhenyue WuJunhua Luo

Abstract

Cesium-lead halide perovskites (e.g. CsPbBr3 ) have gained attention because of their rich physical properties, but their bulk ferroelectricity remains unexplored. Herein, by alloying flexible organic cations into the cubic CsPbBr3 , we design the first cesium-based two-dimensional (2D) perovskite ferroelectric material with both inorganic alkali metal and organic cations, (C4 H9 NH3 )2 CsPb2 Br7 (1). Strikingly, 1 shows a high Curie temperature (Tc =412 K) above that of BaTiO3 (ca. 393 K) and notable spontaneous polarization (ca. 4.2 μC cm-2 ), triggered by not only the ordering of organic cations but also atomic displacement of inorganic Cs+ ions. To our knowledge, such a 2D bilayered Cs+ -based metal-halide perovskite ferroelectric material with inorganic and organic cations is unprecedented. 1 also shows photoelectric semiconducting behavior with large "on/off" ratios of photoconductivity (>103 ).

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Citations

Apr 26, 2019·Dalton Transactions : an International Journal of Inorganic Chemistry·Liao-Kuo GongXiao-Ying Huang
Nov 9, 2019·Chemical Communications : Chem Comm·Bo KouJunhua Luo
Nov 28, 2019·Advanced Materials·Siyuan LiXiaosheng Fang
Mar 14, 2020·Angewandte Chemie·Weichuan ZhangJunhua Luo
Jun 17, 2020·Royal Society Open Science·Kaige GaoWenlong Liu
Nov 10, 2018·Chemical Communications : Chem Comm·Meng-Meng ZhaoDa-Wei Fu
Dec 18, 2018·Chemical Society Reviews·Xinyuan ZhangJunhua Luo
Oct 23, 2020·Advanced Materials·Han-Yue ZhangRen-Gen Xiong
Nov 4, 2020·Chemical Communications : Chem Comm·Dongying FuXian-Ming Zhang
May 18, 2021·Journal of the American Chemical Society·Zhenyue WuJunhua Luo
Mar 12, 2020·Journal of the American Chemical Society·Lizhuang ChenYuan-Yuan Tang
Apr 14, 2020·Journal of the American Chemical Society·Lingling MaoMercouri G Kanatzidis
Sep 17, 2019·Journal of the American Chemical Society·In-Hyeok ParkKian Ping Loh
Feb 25, 2020·Journal of the American Chemical Society·Han-Yue ZhangRen-Gen Xiong
Oct 12, 2019·The Journal of Physical Chemistry Letters·Zheng TangX S Wu
Nov 24, 2020·Journal of the American Chemical Society·Maofan LiZhihua Sun
Feb 19, 2019·Journal of the American Chemical Society·Zhenyue WuJunhua Luo

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