Simulation and automated characterisation of optimal load for flexible composite generators based on piezoelectric ZnO nanowires

Abstract : This paper reports the experimental and numerical study of flexible piezoelectric transducers made of a thin active composite material (~3 μm thick) over a thin flexible metallic foil (~25 μm of stainless steel). The active piezo-layer consists of vertical ZnO nanowires (NWs) embedded into dielectric fillers of different composition. The voltage over a known resistance was measured with an automatic bending setup, and the corresponding power was computed and compared to numerical simulations as a function of load resistance and dielectric matrix in the composite structure. FEM simulations show that the output power can be higher than conventional thin-film devices. These results confirm previous findings and provide important guidelines to optimize flexible piezoelectric transducers for applications as sensors and generators for the Internet of Things. Comparison with a commercial thick-film piezoelectric energy harvester was also made experimentally.
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http://hal.univ-grenoble-alpes.fr/hal-02016623
Contributor : Mireille Mouis <>
Submitted on : Tuesday, February 12, 2019 - 5:55:10 PM
Last modification on : Monday, March 11, 2019 - 3:14:04 PM

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D. Menin, M. Parmar, R. Tao, P. Oliveira, M. Mouis, et al.. Simulation and automated characterisation of optimal load for flexible composite generators based on piezoelectric ZnO nanowires. 2018 Joint International EUROSOI Workshop and International Conference on Ultimate Integration on Silicon (EUROSOI-ULIS), Mar 2018, Granada, Spain. pp.173-176, ⟨10.1109/ULIS.2018.8354762⟩. ⟨hal-02016623⟩

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