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Highly optical properties of ZnO doped with a rare-earth element Y have been prepared by sol-gel method.The doping effect on the structures and optical properties were investigated by XRD, SEM, XPS and low temperature photoluminescence.The UV emission intensity of yttrium doped ZnO was over 300 times stronger than that of a pure ZnO, which was an exciting result in enhancing the ultraviolet near band edge emission in photoluminescence from ZnO nanoparticals.