Effects of Annealing on the Photoluminescence of Erbium-Doped Zinc Oxide NanocrystallineReport as inadecuate




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In order to investigate the Effects of Annealing on the Photoluminescence of Erbium-doped Zinc Oxide Nanocrystalline and Energy transfer from excited states of ZnO hosts to doping Er3+ ions centers. Er3+-doped zinc oxide nanocrystalline powders were successfully prepared by chemical precipitation method at various annealing temperature from 500℃ to 900℃. Photoluminescence spectrum PL, photoluminescence spectrum excitationPLE and X-ray diffraction pattern XRD of nanocrystalline ZnO:Er3+ with excitation wavelength 365nm are measured at room temperature. XRD pattern indicates that nanocrystalline ZnO:Er3+ has a hexagonal wurtzite structure and polycrystalline. The mean grain size of nanocrystalline ZnO:Er3+ were calculated with Debye-Scherrer formula. The luminescence process of Er3+-doped zinc oxide nanocrystalline was investigated by using PL and PLE. Emissions of S3-2(550nm), 2H11-2(521nm)和4F5-2(456nm)of Er3+ ions were observed in wide visible band of ZnO. Relationship between PL Area of Integration of ZnO:Er3+ and annealing temperature were given. An energy transfer from excited states of ZnO hosts to doping Er3+ ions centers was disclosed by the fact that photoluminescence intensity of the peaks of nanocrystalline ZnO:Er3+changed with the Annealing temperature , and the another from the 4f-4f transition of Er3+.

KEYWORDS

ZnO:Er3+ nanocrystalline;Annealing temperature;Photoluminescence;Energy transfer

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Author: Guo-li Song, Xiang-yun Fang, Chun-yan Su

Source: http://www.scirp.org/



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