GaAs nanowire Schottky barrier photovoltaics utilizing Au-Ga alloy catalytic tips

Ning Han, Fengyun Wang, Senpo Yip, Jared J. Hou, Fei Xiu, Xiaoling Shi, Alvin T. Hui, Takfu Hung, Johnny C. Ho

Research output: Contribution to journalArticlepeer-review

36 Citations (Scopus)


Single GaAs nanowire photovoltaic devices were fabricated utilizing rectifying junctions in the Au-Ga catalytic tip/nanowire contact interface. Current-voltage measurements were performed under simulated Air Mass 1.5 global illumination with the best performance delivering an overall energy conversion efficiency of ∼2.8% for a nanowire of 70 nm in diameter. As compared with metal contacts directly deposited on top of the nanowire, this nanoscale contact is found to alleviate the well-known Fermi-level pinning to achieve effective formation of Schottky barrier responsible for the superior photovoltaic response. All these illustrate the potency of these versatile nanoscale contact configurations for future technological device applications.

Original languageEnglish
Article number013105
JournalApplied Physics Letters
Issue number1
Publication statusPublished - Jul 2 2012
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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