GaN Nanowire Arrays for High-Output Nanogenerators

Chi-Te Huang, Jinhui Song, Wei-Fan Lee, Yong Ding, Zhiyuan Gao, Yue Hao, Lih-Juann Chen, Zhong Lin Wang

Research output: Contribution to journalArticlepeer-review

246 Scopus citations

Abstract

Three-fold symmetrically distributed GaN nanowire (NW) arrays have been epitaxially grown on GaN/sapphire substrates. The GaN NW possesses a triangular cross section enclosed by (0001), (2112), and (2112) planes, and the angle between the GaN NW and the substrate surface is ∼62°. The GaN NW arrays produce negative output voltage pulses when scanned by a conductive atomic force microscope in contact mode. The average of piezoelectric output voltage was about -20 mV, while 5-10% of the NWs had piezoelectric output voltages exceeding -(0.15-0.35) V. The GaN NW arrays are highly stable and highly tolerate to moisture in the atmosphere. The GaN NW arrays demonstrate an outstanding potential to be utilized for piezoelectric energy generation with a performance probably better than that of ZnO NWs. © 2010 American Chemical Society.
Original languageEnglish (US)
Pages (from-to)4766-4771
Number of pages6
JournalJournal of the American Chemical Society
Volume132
Issue number13
DOIs
StatePublished - Apr 7 2010
Externally publishedYes

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