A flexible and lead-free BCZT thin film nanogenerator for biocompatible energy harvesting

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

14 Scopus Citations
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  • Fatma Farooqui
  • Fu Shing Lam
  • Wei-Hsin Liao
  • Zuankai Wang

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Original languageEnglish
Pages (from-to)4682-4689
Number of pages8
Journal / PublicationMaterials Chemistry Frontiers
Issue number12
Online published8 Apr 2021
Publication statusPublished - 21 Jun 2021


High-performance piezoelectric thin films generally contain toxic lead that limits the application scenarios especially in wearable and medical devices. Alternative lead-free piezoelectric materials such as Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) have been proved to have high biocompatibility and competitive piezoelectric performances. However, few have reported BCZT thin films integrated within flexible electronics. To fill this gap, we prepare BCZT thin films on flexible mica substrates and based on that fabricate piezoelectric nanogenerators (PENGs). The piezoelectric modulus d33 of the BCZT thin films evaluated from the established system reaches 150 pC N−1, which is comparable to those of films grown on single crystal substrates. The BCZT-based PENG can charge capacitors under mechanical excitation, indicating that it has broad application prospects in the field of flexible self-powered electronics.

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