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• W2898446081 startingPage "442" @default.
• W2898446081 abstract "Abstract Nanorods of the formula α-(Ag2–3×-yEuxLiy)WO4 (where x = 0.01, y = 0.01–0.03 mol) were efficiently synthesized via a low temperature (90 °C) co-precipitation (CP) method. They were structurally characterised using both: X-ray powder diffraction (Rietveld refinement) and low temperature (20 °C to −190 °C) micro-Raman spectroscopy. The morphology of the nanorods was confirmed with field emission scanning electron microscopy. The peaks in the XRD patterns of α-(Ag2–3×-yEuxLiy)WO4 samples were all indexed to the pure orthorhombic phase of α-Ag2WO4 and are in good accordance with ICSD n° 4165. These results indicate that Eu3+ and Li+ ions have both been introduced efficiently into the α-Ag2WO4 lattice. Moreover, the Li+ co-dopant facilitated smoother incorporation of Eu3+ concentration into the α-Ag2WO4 lattice with less distortion of the lattice. In addition the presence of the Li+ co-dopant eases strain in the lattice and this allows the incorporated Eu3+ cations to emit red light much more efficiently. This is seen for α-(Ag2–3×-yEuxLiy)WO4 (where x = 0.01, y = 0.02 mol) in which the optimum red emission is observed. Analysis of the emission spectra in respect to the known metal coordination sites in the structure suggest the Eu3+ cations are only in Ag1 and Ag2 sites which are coordinated by seven O atoms (AgO7 deltahedral polyhedrons). This finding is also confirmed by the photoluminescent decay curves which can be analysed in terms of one depopulation mechanism is in accord with the occurrence of a single coordination environment for the Eu3+ cations. Although the co-doped α-(Ag2–3×-yEuxLiy)WO4 phosphors are much brighter than those containing no Li+ cations they are not bright enough (as yet) to be used in commercial devices." @default.
• W2898446081 created "2018-11-02" @default.
• W2898446081 creator A5000896619 @default.
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• W2898446081 date "2019-02-01" @default.
• W2898446081 modified "2023-10-15" @default.
• W2898446081 title "Luminescence properties of α-Ag2WO4 nanorods co-doped with Li+ and Eu3+ cations and their effects on its structure" @default.
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• W2898446081 doi "https://doi.org/10.1016/j.jlumin.2018.10.104" @default.
• W2898446081 hasPublicationYear "2019" @default.
• W2898446081 type Work @default.

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