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- W2023530052 abstract "Novel blue–white Y2Zr2O7:Dy3+, Li+ phosphors have been prepared by a facile and efficient sol–gel-combustion method at 800 °C, using ammonium nitrate as a fuel and citric acid as a complexing agent. No additional annealing was required, as crystalline Y2Zr2O7 resulted directly from the combustion reaction. The structure and morphology were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The photoluminescence properties were measured using an Edinburgh FLS920 at room temperature. Stable blue–white emission from 425 nm to 625 nm has been observed from Y2Zr2O7:Dy3+ and Y2Zr2O7:Dy3+, Li+ phosphors. The optimal doping concentration of Dy3+ ions is 2 mol%. Experimental analysis and theoretical calculations reveal that the dipole–quadrupole (d–q) interaction should be the major concentration quenching mechanism of Dy3+ ions emission. Li+ co-doping improves luminescence intensity as well as crystallinity significantly. The incorporation of Li+ ions into Y2Zr2O7 lattice could induce a remarkable increase of photoluminescence intensity by about 2 times. The mechanism of the enhanced emission by Li+ doping was discussed. Both the chromaticity coordinates of Y2Zr2O7:Dy3+ and Y2Zr2O7:Dy3+, Li+ samples were in the near cold-white region." @default.
- W2023530052 created "2016-06-24" @default.
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- W2023530052 date "2013-03-01" @default.
- W2023530052 modified "2023-09-25" @default.
- W2023530052 title "Enhanced luminescence of novel Y2Zr2O7:Dy3+ phosphors by Li+ co-doping" @default.
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- W2023530052 doi "https://doi.org/10.1016/j.jallcom.2012.10.074" @default.
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