Poly(vinylidene fluoride)-Stabilized Black γ-Phase CsPbI3 Perovskite for High-Performance Piezoelectric Nanogenerators

Weiguang Zhu; Asif Abdullah Khan; Md Masud Rana; Rozenn Gautheron-Bernard; Nicolas R Tanguy; Ning Yan; Pascal Turban; Soraya Ababou-Girard; Dayan Ban

doi:10.1021/acsomega.2c00091

Poly(vinylidene fluoride)-Stabilized Black γ-Phase CsPbI₃ Perovskite for High-Performance Piezoelectric Nanogenerators

ACS Omega. 2022 Mar 15;7(12):10559-10567. doi: 10.1021/acsomega.2c00091. eCollection 2022 Mar 29.

Authors

Affiliations

¹ Waterloo Institute for Nanotechnology, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
² Univ Rennes, CNRS, IPR (Institut de Physique de Rennes) - UMR 6251, F-35000 Rennes, France.
³ Department of Chemical Engineering and Applied Chemistry, University of Toronto, Toronto, Ontario M5S 3E5, Canada.
⁴ Department of Electrical and Computer Engineering, University of Waterloo, Waterloo, Ontario N2L 3G1, Canada.
⁵ School of Physics and Electronics, Henan University, Kaifeng 475001, Henan, P. R. China.

Abstract

Halide perovskite materials have been recently recognized as promising materials for piezoelectric nanogenerators (PENGs) due to their potentially strong ferroelectricity and piezoelectricity. Here, we report a new method using a poly(vinylidene fluoride) (PVDF) polymer to achieve excellent long-term stable black γ-phase CsPbI₃ and explore the piezoelectric performance on a CsPbI₃@PVDF composite film. The PVDF-stabilized black-phase CsPbI₃ perovskite composite film can be stable under ambient conditions for more than 60 days and over 24 h while heated at 80 °C. Piezoresponse force spectroscopy measurements revealed that the black CsPbI₃/PVDF composite contains well-developed ferroelectric properties with a high piezoelectric charge coefficient (d ₃₃) of 28.4 pm/V. The black phase of the CsPbI₃-based PVDF composite exhibited 2 times higher performance than the yellow phase of the CsPbI₃-based composite. A layer-by-layer stacking method was adopted to tune the thickness of the composite film. A five-layer black-phase CsPbI₃@PVDF composite PENG exhibited a voltage output of 26 V and a current density of 1.1 μA/cm². The output power can reach a peak value of 25 μW. Moreover, the PENG can be utilized to charge capacitors through a bridge rectifier and display good durability without degradation for over 14 000 cyclic tests. These results reveal the feasibility of the all-inorganic perovskite for the design and development of high-performance piezoelectric nanogenerators.