Lead-Free Transparent Flexible Piezoelectric Nanogenerator for Self-Powered Wearable Electronic Sensors and Energy Harvesting through Rainwater

Veeralingam, Sushmitha and Badhulika, Sushmee (2022) Lead-Free Transparent Flexible Piezoelectric Nanogenerator for Self-Powered Wearable Electronic Sensors and Energy Harvesting through Rainwater. ACS Applied Energy Materials. pp. 1-13. ISSN 2574-0962

[img] Text
Applied_Energy_Materials.pdf - Published Version
Restricted to Registered users only

Download (3MB) | Request a copy


Most piezoelectric nanogenerators are based on bioincompatible materials, limiting their use in self-powered wearable applications. Addressing this, we report a high-performance, flexible, biocompatible, lead-free bismuth tungstate (Bi2WO6)-based piezoelectric nanogenerator. A facile, low-cost hydrothermal route is used to synthesize biconcave-shaped Bi2WO6 nanoparticles. X-ray powder diffraction studies confirm its orthorhombic (pseudotetragonal) structure, while XRD studies prove its noncentrosymmetric (Pca21) space group is responsible for the origin of the piezoelectric property. Piezoelectric force microscopy (PFM) studies reveal a piezoelectric charge coefficient (d33) of 142.27 pm/V. A transparent Bi2WO6:PDMS piezoelectric nanogenerator is fabricated using Bi2WO6 nanoparticles embedded in a polydimethylsiloxane (PDMS) polymer matrix with platinum as a counter electrode and the device configuration of Pt-coated PET/(Bi2WO6:PDMS)/ITO-coated PET. A stable, high output voltage and current density of 50 V and 0.6 μA/cm2, respectively, are achieved by applying a low vertical compressive force (0.15 kgf, kilogram-force) without electric poling. This can be attributed to the high piezoelectric coefficient of Bi2WO6 nanoparticles and the low surface energy of the highly flexible PDMS polymer. A fast response of 100 ms and energy conversion efficiency of 23.18% are obtained for the device, which is significantly higher than similar recent reports. In addition, the versatility of the robust nanogenerator is demonstrated by recording acoustic signals, energy harvesting from human body motion, utilizing it as a fast response smart sensor door, and energy harvesting from rainwater. The platform developed here proves its candidacy for numerous self-powered wearable biocompatible electronic applications. © 2022 American Chemical Society.

[error in script]
IITH Creators:
IITH CreatorsORCiD
Badhulika, Sushmeehttps://orcid.org/0000-0003-3237-3031
Item Type: Article
Additional Information: S.B. acknowledges financial assistance from Defence Research Development Organization funding DYSL-AST/CARS/CONTRACT/20-21/02.
Uncontrolled Keywords: bismuth tungstate; human motion monitoring; piezoelectric nanogenerator; rainwater energy harvesting; self-powered electronics; smart door sensor; transparent
Subjects: Electrical Engineering
Divisions: Department of Electrical Engineering
Depositing User: . LibTrainee 2021
Date Deposited: 22 Oct 2022 05:49
Last Modified: 22 Oct 2022 05:49
URI: http://raiith.iith.ac.in/id/eprint/11022
Publisher URL: http://doi.org/10.1021/acsaem.2c02521
OA policy: https://v2.sherpa.ac.uk/id/publication/37813
Related URLs:

Actions (login required)

View Item View Item
Statistics for RAIITH ePrint 11022 Statistics for this ePrint Item