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- W2801390082 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 )." @default.
- W2801390082 created "2018-05-17" @default.
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- W2801390082 date "2018-07-02" @default.
- W2801390082 modified "2023-10-15" @default.
- W2801390082 title "Alloying <i>n</i> ‐Butylamine into CsPbBr <sub>3</sub> To Give a Two‐Dimensional Bilayered Perovskite Ferroelectric Material" @default.
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- W2801390082 doi "https://doi.org/10.1002/anie.201803716" @default.
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- W2801390082 hasPublicationYear "2018" @default.
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