Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 186, Issue -, Pages 327-332Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2016.11.003
Keywords
Porous; ZnO etching; Energy harvester; Piezoelectric; Nanogenerator; Electrets
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Funding
- Science and Engineering Research Board, Government of India [SERB/1759/2014-15]
- DST, Govt. of India (FIST-II programme)
- INSPIRE fellowship [IF130865]
- UGC for BSR fellowship [P-1/RS/79/13]
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A flexible sponge-like nanogenerator (FSNG) based on ZnO nanoparticles (NPs) etched porous electret poly (vinylidene fluoride hexafluoropropylene) (P(VDF-HFP)) film is spotlighted without any electrical poling treatment. It possesses improved dielectric and ferroelectric properties than neat P(VDF-HFP) film. The FSNG harvests an open-circuit voltage (V-oc) of 9 V and short circuit current (I-sc) of 1.3 mu Acm(-2) under repeated mechanical impact of 036 MPa stress amplitude on the top surface. With the power density (P) of 1.21 mW/cm(2) and energy conversion efficiency of 0.3% it directly operates several consumer-electronics. The highly sensitive (similar to 1 mu VPa-1) FSNG is demonstrated as a self-powered wireless sensor with 3.0% efficiency for detecting some tiny human activities including finger movements. (C) 2016 Elsevier B.V. All rights reserved.
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