De Gejihu, Qin Weiping, Zhang Jisen, Zhao Dan ( Key Laboratory of Excited State Processes, Changchun Institute of Optics, Fine Mechanics and Physics, Chinese Academy of Science, Changchun 130033, China)
<正> The Y2O3: Yb3+, Er3+ microstructures were fabricated by a hydrothermal method without surfactants. The microstructures structure was characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM, KYKY 1000B). The up-conversion luminescence spectra were studied under 978 nm laser diode excitation. In Yb3+ and Er3+ codoped Y2O3 microcrystals, the relative intensity of green emission became stronger as the morphology of sample changed from wires to films.
upconversion luminescence; Y2O3:Yb3+, Er3+ microstructures; rare earths
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