A Three-Dimensional Lead Halide Perovskite-Related Ferroelectric,Journal of the American Chemical Society

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A Three-Dimensional Lead Halide Perovskite-Related Ferroelectric
Journal of the American Chemical Society ( IF 14.4 ) Pub Date : 2020-02-24 , DOI: 10.1021/jacs.0c00375
Han-Yue Zhang ₁ , Xian-Jiang Song ₁ , Hao Cheng ₂ , Yu-Ling Zeng ₂ , Yi Zhang ₁ , Peng-Fei Li ₂ , Wei-Qiang Liao ₂ , Ren-Gen Xiong _{1,

2}

Affiliation

Three-dimensional (3D) organic-inorganic lead halides represented by [CH3NH3]PbI3 perovskite have attracted great interest for their diverse functional properties and promising optoelectronic applications. However, 3D lead halides are still very rare and their ferroelectricity remains controversial. Here, we report an unprecedented 3D lead halide perovskite-related ferroelectric [2-trimethylammonioethylammonium]Pb2Cl6 ([TMAEA]Pb2Cl6), which contains a 3D lead chloride framework of corner- and edge-sharing PbCl6 octahedral, with the [TMAEA]+ cations occupying the voids of the framework. [TMAEA]Pb2Cl6 shows a ferroelectric-to-paraelectric phase transition with the Curie temperature as high as 412 K, a typical ferroelectric hysteresis loop at 293 K with a spontaneous polarization of 1 μC/cm2, and a clear ferroelectric domain switching. To the best of our knowledge, [TMAEA]Pb2Cl6 is the first 3D lead halide showing such an excellent ferroelectricity. Additionally, it also exhibits semiconducting property with a direct bandgap of 3.43 eV. This finding enriches the family of 3D hybrid lead halides, and inspires the exploration of 3D lead halide ferroelectrics.

中文翻译：

一种三维卤化铅钙钛矿相关铁电体

以[CH3NH3]PbI3钙钛矿为代表的三维（3D）有机-无机卤化铅因其多样化的功能特性和有前途的光电应用而引起了人们的极大兴趣。然而，3D 卤化铅仍然非常罕见，它们的铁电性仍然存在争议。在这里，我们报告了一种前所未有的 3D 卤化铅钙钛矿相关铁电体 [2-三甲基氨乙基铵]Pb2Cl6 ([TMAEA]Pb2Cl6)，它包含一个 3D 氯化铅框架，具有角和边缘共享 PbCl6 八面体，具有 [TMAEA]+ 阳离子占据框架的空隙。[TMAEA]Pb2Cl6 显示出铁电-顺电相变，居里温度高达 412 K，典型的铁电滞后回线在 293 K，自发极化为 1 μC/cm2，以及清晰的铁电畴转换。据我们所知，[TMAEA]Pb2Cl6 是第一个表现出如此出色铁电性的 3D 卤化铅。此外，它还表现出半导体特性，直接带隙为 3.43 eV。这一发现丰富了 3D 混合卤化铅家族，并激发了对 3D 卤化铅铁电体的探索。

更新日期：2020-02-24

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