Abstract
In this research paper, a flexible piezoelectric energy harvesting device based on Ca-doped ZnO (CaZ) nanofiller reinforced poly(vinylidene fluoride-trifluoroethylene) (PVDF-TrFE) composite film has been fabricated and evidenced with enhanced dielectric, ferroelectric and piezoelectric performances. Additionally, a comparative analysis of the crystalline and morphological behavior of the fabricated composite film with pure PVDF-TrFE films has also been reported. A maximum of 1.32 μC/cm2 saturated polarization and 0.604 μC/cm2 remnant polarization values are obtained for the composite film with a coercive field of ~41 MV/m. The energy harvesting device fabricated from the CaZ/PVDF-TrFE composite film demonstrated an outstanding rectified output voltage of 3 V under continuous human hand tapping and performed well under an oscillating force, resulting in a peak to peak output voltage of 0.289 V at 0.5 N force. The proposed composite film-based device is expected to be a promising material for energy conversion and sensing in the futuristic energy generator applications.
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