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- W2003447714 abstract "Up-conversion(UC) phosphors of Ho3+–Yb3+ co-doped yttrium-stabilized zirconia were successfully synthesized using the chemical co-precipitation method. The phosphors were characterized by X-ray diffractometry (XRD) and fluorescence spectroscopy, and then the proposed UC mechanism was given in detail. The results indicate that doping 8 mol% Y3+ ions into zirconia can stabilize the cubic phase (c-ZrO2) to room temperature in phosphors which were sintered at 1200 °C for 3 h. Under 980 nm excitation, Ho3+–Yb3+ co-doped phosphors exhibit intense green luminescence corresponding to the Ho3+:(5F4,5S2)→5I8 transition, and the luminescence intensities of phosphors much depend on Yb3+ concentrations. With the increase of Yb3+ concentration, luminescent intensity increases initially and then decreases when Yb3+ doping content exceeds 7 mol% mainly due to cross relaxation (CR) processes. Moreover, high Ho3+ doping concentration is detrimental to the overall UC intensity owing to the CR processes. Finally, sample co-doped with 0.1 mol% Ho3+ and 7 mol% Yb3+ obtains the strongest UC luminescence." @default.
- W2003447714 created "2016-06-24" @default.
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- W2003447714 date "2015-05-01" @default.
- W2003447714 modified "2023-10-13" @default.
- W2003447714 title "Concentration-dependent up-converted luminescence of Ho3+–Yb3+ co-doped yttrium-stabilized zirconia phosphors" @default.
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- W2003447714 doi "https://doi.org/10.1016/j.jlumin.2015.01.019" @default.
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