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Enhanced photoconduction of free-standing ZnO nanowire films by L-lysine treatment

  • Liu, Jinzhang
  • Park, Jaeku
  • Park, Kyung Ho
  • Ahn, Yeonghwan
  • Park, Ji-Yong
  • Koh, Ken Ha
  • Lee, Soonil
Publication Date
Oct 01, 2010
Queensland University of Technology ePrints Archive
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Flexible paper-like ZnO nanowire films are fabricated and the effect of L-lysine passivation of the nanowire surfaces on improving the UV photoresponse is studied. We prepare three types of nanowires with different defect contents, and find that the L-lysine treatment can suppress the oxygen-vacancy-related photoluminescence as well as enhance the UV photoconduction. The nanowires with fewer defects gain larger enhancement of UV photoconduction after L-lysine treatment. Reproducible UV photoresponse of the devices in humid air is obtained due to L-lysine surface passivation, ruling out the influence of water molecules in degrading the UV photocurrent.

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