Abstract
Harvesting mechanical energy from the ambient environment with piezoelectric nanogenerators (PENGs) consisting of piezoelectric nanoparticles (NPs) and flexible polymer has drawn considerable attention for developing self-powered electronic devices. Here, a flexible, lead-free, solution processable PENG, composing piezoelectric ZnSnO3 NPs and plasticized PVC was fabricated by a simple solution casting method. The nanogenerator shows a VOC of ∼40 V, a ISC of ∼1.4 μA, and an overall power density more than ∼3.7 μW cm–2 at 35 wt % loading of ZnSnO3, and these values are the highest reported so far in the literature on the cubic ZnSnO3-based nanogenerator. We utilized the generated power for powering seven different color LEDs without any external energy storage unit. Also, the nanogenerator could charge a commercial capacitor (2.2 μF) to ∼6.7 V in ∼129 s, which can be used for powering wristwatch, mobile LCD screen, and calculator.
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