Cesium Lead Halide Perovskite Decorated Polyvinylidene Fluoride Nanofibers for Wearable Piezoelectric Nanogenerator Yarns.

Content Provider	Europe PMC
Author	Wu, Siying Zabihi, Fatemeh Yeap, Rou Yi Darestani, Mohammad Reza Yousefi Bahi, Addie Wan, Zeyu Yang, Shengyuan Servati, Peyman Ko, Frank K.
Copyright Year	2023
Abstract	Piezoelectric nanogenerators (PENGs) provide a viablesolutionto convert the mechanical energy generated by body movement to electricity.One-dimensional yarns offer a platform for flexible wearable textilePENGs, which can conform to body for comfort and efficient energyharvesting. In this context, we report a flexible piezoelectric yarn,assembled by one-step cocentric deposition of cesium lead halide perovskitedecorated polyvinylidene fluoride (PVDF) nanofibers, on a stainless-steelyarn. Perovskite crystals were formed in situ duringelectrospinning. Our work demonstrates a nanofiber morphology in whichperovskite crystals spread over the nanofiber, leading to a roughsurface, and complementing piezoelectric nanocomposite formation withPVDF for superior stress excitation. We investigated how the halideanions of perovskite affect the piezoelectric performance of PENGyarns by comparing CsPbBr3 and CsPbI2Br. Effectsof the perovskite concentration, annealing temperature, and depositiontime on the piezoelectric properties of PENG yarns were investigated.Devices assembled with a single yarn of CsPbI2Br decoratedPVDF nanofibers yield the optimal performance with an output voltageof 8.3 V and current of 1.91 μA in response to pressing froman actuator and used to charge capacitors for powering electronics.After aging in the ambient environment for 3 months, the device maintainedits performance during 19,200 cycles of mechanical stresses. The excellentand stable electrical performance can be ascribed to the optimizedcrystallization of CsPbI2Br crystals, their complementingperformance with PVDF, and formation of nanofibers with uniformityand strength. The flexibility of piezoelectric yarns enables themto be bent, twisted, braided, and woven for different textile integrationswhile harvesting energy from body movements, demonstrating the potentialfor wearable mechanical energy harvesting.
ISSN	19360851
Journal	ACS Nano
PubMed Central reference number	PMC9878976
Issue Number	2
PubMed reference number	36599026
e-ISSN	1936086X
DOI	10.1021/acsnano.2c07320
Language	English
Publisher	American Chemical Society
Publisher Date	2023-01-04
Access Restriction	Open
Rights License	Permits non-commercial access and re-use, provided that author attribution and integrity are maintained; but does not permit creation of adaptations or other derivative works (https://creativecommons.org/licenses/by-nc-nd/4.0/). © 2023 The Authors. Published by American Chemical Society
Subject Keyword	piezoelectric yarn electrospinning perovskite polyvinylidene fluoride composite nanofibers
Content Type	Text
Resource Type	Article
Subject	Nanoscience and Nanotechnology Physics and Astronomy Engineering Materials Science