Sekhar Muddam Raja, Sinclair Joseph, Krishnan Jagadamma Lethy
Energy Harvesting Research Group, School of Physics & Astronomy, Scottish Universities Physics Alliance (SUPA), University of St Andrews, North Haugh, St Andrews KY16 9SS, UK.
Materials (Basel). 2024 Jun 23;17(13):3083. doi: 10.3390/ma17133083.
Halide perovskites are an emerging family of piezoelectric and ferroelectric materials. These materials can exist in bulk, single-crystal, and thin-film forms. In this article, we review the piezoelectric charge coefficient (d) of single crystals, thin films, and dimension-tuned halide perovskites based on different measurement methods. Our study finds that the (d) coefficient of the bulk and single-crystal samples is mainly measured using the quasi-static (Berlincourt) method, though the piezoforce microscopy (PFM) method is also heavily used. In the case of thin-film samples, the (d) coefficient is dominantly measured by the PFM technique. The reported values of d coefficients of halide perovskites are comparable and even better in some cases compared to existing materials such as PZT and PVDF. Finally, we discuss the promising emergence of quasi-static methods for thin-film samples as well.
卤化物钙钛矿是一类新兴的压电和铁电材料。这些材料可以以块状、单晶和薄膜形式存在。在本文中，我们基于不同的测量方法，综述了单晶、薄膜以及尺寸调控的卤化物钙钛矿的压电电荷系数（d）。我们的研究发现，块状和单晶样品的（d）系数主要使用准静态（伯林科特）方法测量，不过压电力显微镜（PFM）方法也被大量使用。对于薄膜样品，（d）系数主要通过PFM技术测量。卤化物钙钛矿的d系数报道值与诸如PZT和PVDF等现有材料相当，在某些情况下甚至更好。最后，我们也讨论了薄膜样品准静态方法的前景。
