Piezoelectric Nanogenerators Based on Zinc Oxide Nanowire Arrays
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- 14 April 2006
- journal article
- other
- Published by American Association for the Advancement of Science (AAAS) in Science
- Vol. 312 (5771), 242-246
- https://doi.org/10.1126/science.1124005
Abstract
We have converted nanoscale mechanical energy into electrical energy by means of piezoelectric zinc oxide nanowire (NW) arrays. The aligned NWs are deflected with a conductive atomic force microscope tip in contact mode. The coupling of piezoelectric and semiconducting properties in zinc oxide creates a strain field and charge separation across the NW as a result of its bending. The rectifying characteristic of the Schottky barrier formed between the metal tip and the NW leads to electrical current generation. The efficiency of the NW-based piezoelectric power generator is estimated to be 17 to 30%. This approach has the potential of converting mechanical, vibrational, and/or hydraulic energy into electricity for powering nanodevices.Keywords
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