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Organometal Trihalide Perovskites with Intriguing Ferroelectric and Piezoelectric Properties

机译：具铁电和压电特性的有机金属三卤化物钙钛矿

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摘要

Organometal trihalide perovskites (OTPs) as a new subclass of perovskite materials have recently aroused increasing interest due to their numerous advantages of facile low-temperature processing, tunable bandgaps, diverse compositions, and superior charge transfer dynamics, which have been widely used in various applications. In particular, solar cells composed of these perovskites have made unprecedented progress in just a few years with maximum power conversion efficiency, evolving from 3.8 to 21.6%. In spite of such impressive achievement, a fundamental understanding of intrinsic optoelectronic and physiochemical properties is a key challenge impeding the development of the OTPs. This review article aims to provide a concise overview of the current status of OTPs research, highlighting the unique properties of OTPs, especially ferroelectric and piezoelectric properties, which are vital to photovoltaic and piezoelectric applications but still not adequately explained. Various material synthesis strategies of OTPs are surveyed, exhibiting that the OTPs architecture can serve as a promising and robust platform for opening new horizons in ferroelectric and piezoelectric researches. Several applications, including piezoelectric generators, solar cells, light-emitting diodes, lasers, photodetectors, and water-splitting cells, demonstrate the latent potentialities of OTPs.
机译：有机金属三卤化物钙钛矿（OTPs）作为钙钛矿材料的一个新的子类别，由于其易于加工的低温，可调节的带隙，多样的组成以及优越的电荷转移动力学等诸多优点，最近引起了越来越多的关注，这些优点已广泛用于各种应用中。特别是，由这些钙钛矿组成的太阳能电池在短短几年内取得了空前的进步，其最大的功率转换效率从3.8％提升到21.6％。尽管取得了如此骄人的成绩，但对内在的光电和理化特性的基本了解仍然是阻碍OTP发展的关键挑战。这篇综述文章旨在简要概述OTP的研究现状，重点介绍OTP的独特特性，尤其是铁电和压电特性，这些特性对于光伏和压电应用至关重要，但仍未得到充分解释。对OTPs的各种材料合成策略进行了调查，结果表明OTPs体系结构可以为铁电和压电研究开辟新的前景提供有希望且强大的平台。包括压电发电机，太阳能电池，发光二极管，激光器，光电探测器和水分解电池在内的多种应用证明了OTP的潜在潜力。

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