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Abstract
Flexible paper-like ZnO nanowire films are fabricated and the effect of L-lysine passivationof the nanowire surfaces on improving the UV photoresponse is studied. We preparethree types of nanowires with different defect contents, and find that the L-lysinetreatment can suppress the oxygen-vacancy-related photoluminescence as well asenhance the UV photoconduction. The nanowires with fewer defects gain largerenhancement of UV photoconduction after L-lysine treatment. Reproducible UVphotoresponse 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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