Inorganic semiconductor ferroelectrics such as BiFeO3 have shown great potential in photovoltaic and other applications. Currently, semiconducting properties and the corresponding application in optoelectronic devices of hybrid organo-plumbate or stannate are a hot topic of academic research; more and more of such hybrids have been synthesized. Structurally, these hybrids are suitable for exploration of ferroelectricity. Therefore, the design of molecular ferroelectric semiconductors based on these hybrids provides a possibility to obtain new or high-performance semiconductor ferroelectrics. Here we investigated Pb-layered perovskites, and found the layer perovskite (benzylammonium)2PbCl4 is ferroelectric with semiconducting behaviours. It has a larger ferroelectric spontaneous polarization Ps=13 μC cm(-2) and a higher Curie temperature Tc=438 K with a band gap of 3.65 eV. This finding throws light on the new properties of the hybrid organo-plumbate or stannate compounds and provides a new way to develop new semiconductor ferroelectrics.

中文翻译：

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卤化钙钛矿型分子铁电半导体。

无机半导体铁电体（例如BiFeO3）在光伏和其他应用中显示出巨大潜力。目前，半导体性能及其在杂化有机铅酸盐或锡酸盐的光电器件中的相应应用是学术研究的热点。越来越多的此类杂种已被合成。从结构上讲，这些混合动力电池适合于探索铁电。因此，基于这些杂化体的分子铁电体半导体的设计提供了获得新的或高性能的半导体铁电体的可能性。在这里，我们研究了Pb层钙钛矿，发现钙钛矿（苄基铵）2 PbCl 4是铁电体，具有半导体行为。它具有较大的铁电自发极化Ps = 13μCcm（-2）和较高的居里温度Tc = 438 K，带隙为3.65 eV。这一发现揭示了杂化有机铅酸盐或锡酸盐化合物的新特性，并为开发新的半导体铁电体提供了新的途径。