Poly(vinylidene Fluoride)-Stabilized Black γ-Phase CsPbI Perovskite for High-Performance Piezoelectric Nanogenerators

Overview

Journal ACS Omega

Publisher American Chemical Society

Specialty Chemistry

Date 2022 Apr 6

PMID 35382301

Authors

Weiguang Zhu

Asif Abdullah Khan

Md Masud Rana

Rozenn Gautheron-Bernard

Nicolas R Tanguy

Ning Yan

Pascal Turban

Soraya Ababou-Girard

Dayan Ban

Affiliations

Soon will be listed here.

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 CsPbI and explore the piezoelectric performance on a CsPbI@PVDF composite film. The PVDF-stabilized black-phase CsPbI 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 CsPbI/PVDF composite contains well-developed ferroelectric properties with a high piezoelectric charge coefficient ( ) of 28.4 pm/V. The black phase of the CsPbI-based PVDF composite exhibited 2 times higher performance than the yellow phase of the CsPbI-based composite. A layer-by-layer stacking method was adopted to tune the thickness of the composite film. A five-layer black-phase CsPbI@PVDF composite PENG exhibited a voltage output of 26 V and a current density of 1.1 μA/cm. 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.

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