Enhanced piezo-response in copper halide perovskites based PVDF composite films

Sheng Huang; Gang Tang; Hailong Huang; Xian-Gang Wu; Puming Zhou; Lin Zou; Lei Xie; Jianming Deng; Xueyun Wang; Haizheng Zhong; Jiawang Hong

doi:10.1016/j.scib.2018.07.014

Enhanced piezo-response in copper halide perovskites based PVDF composite films

Sci Bull (Beijing). 2018 Oct 15;63(19):1254-1259. doi: 10.1016/j.scib.2018.07.014. Epub 2018 Jul 24.

Authors

Sheng Huang¹, Gang Tang², Hailong Huang³, Xian-Gang Wu¹, Puming Zhou², Lin Zou⁴, Lei Xie⁴, Jianming Deng², Xueyun Wang², Haizheng Zhong⁵, Jiawang Hong⁶

Affiliations

¹ Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China.
² School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China.
³ The 48th Research Institute, China Electronics Technology Group Corporation, Changsha 410111, China.
⁴ Key Laboratory of Neutron Physics and Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621999, China.
⁵ Beijing Key Laboratory of Nanophotonics and Ultrafine Optoelectronic Systems, School of Materials Science & Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: hzzhong@bit.edu.cn.
⁶ School of Aerospace Engineering, Beijing Institute of Technology, Beijing 100081, China. Electronic address: hongjw@bit.edu.cn.

PMID: 36658863
DOI: 10.1016/j.scib.2018.07.014

Abstract

In-situ fabricated perovskite nanocrystals in polymeric matrix provide new generation composite materials for plenty of cutting edge technology. In this work, we report the in-situ fabrication of copper halide perovskite (MA₂CuCl₄, MA:CH₃NH₃⁺) embedded poly(vinylidene fluoride) (PVDF) composite films. The optimized MA₂CuCl₄/PVDF composite films exhibit greatly enhanced piezo-response in comparasion with pure PVDF films. The enhancements were invesitgated and explained by applying piezo-response force microscopy (PFM) measurements and density functional theory (DFT) caculations. We proposed that the high piezoelectric properties of MA₂CuCl₄/PVDF composite films could be related to the large Cu off-centering displacement, the strong interactions between MA₂CuCl₄ and PVDF as well as large stress concentration around the MA₂CuCl₄ particles in the films. These piezoelectric composite films are expected to be suitable functional materials for flexible and/or wearable piezoelectrics.

Keywords: Composite films; MA(2)CuCl(4); Perovskite; Piezoelectric.