GaN nanowires for piezoelectric generators

Abstract : We demonstrate the high potential of GaN nanowires (NWs) to convert mechanical energy into electric energy. Using an atomic force microscope equipped with a Resiscope module, an average output voltage of –74 mV and a maximum of –443 mV ± 2% per NW were measured. This latter value is the highest reported so far for GaN NWs. By considering these output signals, we have estimated an average and a maximum power density generated by one layer of GaN NWs of the order of 5.9 mW/cm2 and 130 mW/cm2, respectively. These results offer promising prospects for the use of GaN NWs for high-efficiency ultracompact piezogenerators.
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Submitted on : Wednesday, December 10, 2014 - 5:07:20 PM
Last modification on : Sunday, December 1, 2019 - 7:40:03 PM

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Noelle Gogneau, Pascal Chrétien, Elisabeth Galopin, Stephane Guilet, Laurent Travers, et al.. GaN nanowires for piezoelectric generators. physica status solidi (RRL) - Rapid Research Letters, Wiley-VCH Verlag, 2014, 8 (5), pp.414-419. ⟨10.1002/pssr.201409105⟩. ⟨hal-01093504⟩

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