Abstract
Copper-doped zinc oxide nanowires were fabricated on copper-coated silicon substrate bysintering a mixture of zinc oxide and graphite powders at high temperature. Copperfunctioned as a catalyst in the zinc oxide nanowire growth and was incorporated during thegrowth as a dopant. The size of copper-doped zinc oxide nanowires ranges from 30 to100 nm in diameter and tens to hundreds of microns in length. The photoluminescentexcitation spectra showed multiple absorption peaks in the ultraviolet and blue/greenregion. Correspondingly, broad and continuous photoluminescence spectra were observedextending from the ultraviolet to the red region with shoulder peaks at room temperature,which is different from that of the bulk. The x-ray photoelectron spectroscopy and lowtemperature photoluminescence were employed to analyse the luminescent mechanism.
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