Abstract
Piezoelectric nanogenerator (PENG) devices based on zinc oxide (ZnO) nanostructures of different pH (5, 9 and 12) encapsulated in polydimethylsiloxane (PDMS) have been fabricated and their morphology effect on the output performance has been analyzed. Electrical characterizations have been performed on the devices to examine their robustness, power generation ability, stability and durability. FTIR analysis has revealed the increase in Zn-O bond length with the increase in pH signifying the tensile strain built up within the crystallites. Hence, the PENG fabricated with pH 12 nanostructures has generated an open circuit voltage of ~34 V and a short circuit current of 6.9 nA. No significant change is observed in the output for 3 consecutive weeks. It is believed that the PENG developed by simple and cost-effective methods as reported can be utilized in low power consumption devices.
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