Department of Chemistry, University of Pavia, Via T. Taramelli 14, 27100 Pavia, Italy.
Department of Chemistry & INSTM, University of Pavia, Via T. Taramelli 14, 27100 Pavia, Italy.
J Phys Chem Lett. 2023 Apr 13;14(14):3535-3552. doi: 10.1021/acs.jpclett.3c00566. Epub 2023 Apr 5.
Ferroelectric ceramics such as PbZrTiO (PZT) are widely applied in many fields, from medical to aerospace, because of their dielectric, piezoelectric, and pyroelectric properties. In the past few years, hybrid organic-inorganic halide perovskites have gradually attracted attention for their optical and electronic properties, including ferroelectricity, and for their low fabrication costs. In this Review, we first describe techniques that are used to quantify ferroelectric figures of merit of a material. We then discuss ferroelectricity in hybrid perovskites, starting from controversies in methylammonium iodoplumbate perovskites and then focusing on low-dimensional perovskites that offer an unambiguous platform to obtain ferroelectricity. Finally, we provide examples of the application of perovskite ferroelectrics in solar cells, LEDs, and X-ray detectors. We conclude that the vast structure-property tunability makes low-dimensional hybrid perovskites promising, but they have yet to offer ferroelectric figures of merit (e.g., saturated polarization) and thermal stability (e.g., Curie temperature) competitive with those of conventional oxide perovskite ferroelectric materials.
铁电陶瓷，如 PbZrTiO（PZT），由于其介电、压电和热释电性能，被广泛应用于从医学到航空航天等许多领域。在过去的几年中，由于其光学和电子性能，包括铁电性，以及其低廉的制造成本，混合有机-无机卤化物钙钛矿逐渐引起了人们的关注。在这篇综述中，我们首先描述了用于量化材料铁电优值的技术。然后，我们从甲脒碘化铅钙钛矿的争议开始，讨论了钙钛矿中的铁电性，然后重点介绍了低维钙钛矿，为获得铁电性提供了一个明确的平台。最后，我们提供了钙钛矿铁电体在太阳能电池、LED 和 X 射线探测器中的应用实例。我们的结论是，巨大的结构-性能可调性使得低维混合钙钛矿很有前景，但它们仍需要提供与传统氧化物钙钛矿铁电材料竞争的铁电优值（如饱和极化）和热稳定性（如居里温度）。
