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- W2068691711 abstract "Er3+ doped and Yb3+/Er3+ co-doped Y4Al2O9 phosphors are prepared by the sol–gel method. The effect of dopant concentration on the structure and up-conversion properties is investigated by X-ray diffraction (XRD) and photoluminescence, respectively. XRD pattern indicates that the sample structure belongs to monoclinic. Under 980 nm excitation, the green and red up-conversion emissions are observed and the emission intensities depended on the Yb3+ ion concentration. The green up-conversion emissions decrease with the increase of Yb3+ concentration, while red emission increases as Yb3+ concentration increases from 0 to 8 at% and then decreases at high Yb3+ concentration. The mechanisms of the up-conversion emissions are discussed and results shows that in Er3+ and Yb3+/Er3+ co-doped system, cross-relaxation (CR) and energy transfer (ET) processes play an important role for the green and red up-conversion emissions." @default.
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- W2068691711 date "2012-04-01" @default.
- W2068691711 modified "2023-09-29" @default.
- W2068691711 title "The up-conversion properties of Yb3+ and Er3+ doped Y4Al2O9 phosphors" @default.
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- W2068691711 doi "https://doi.org/10.1016/j.physb.2012.01.077" @default.
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