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- W2775709648 abstract "Tb3+-doped Lu2O3 nanophosphors were prepared via simple sol–gel method, at different pH value of solution (2, 5, 8 and 11), using diethanolamine (DEA) as polymerization agent. The nanopowder samples were characterized by X-ray diffraction (XRD), field emission-scanning electron microscopy (FE-SEM), Fourier transform infrared spectroscopy (FTIR), Raman spectroscopy, room temperature steady and time resolved photoluminescence spectroscopy. The structural analysis reveals that all samples mainely crystallized in the cubic bixbyite structure with Ia3 space group. Also, it was found that the pH value of solution strongly influences the crystallite size, the vibrational frequency modes and the surface morphology of Lu2O3:Tb3+ nanocrystals. All samples show blue-greenish emissions, corresponding to 5D4 → 7FJ (J = 3, 4, 5 and 6) intraconfigurationnelles transitions. The intense green emission peak situated at 542 nm is assigned to 5D4 → 7F5 transition. The 4f8 → 4f75d1 spin-allowed and forbidden transitions, the charge transfer band (CTB) O2− → Tb3+ and the host absorption bands were observed and their dependence on pH value is discussed." @default.
- W2775709648 created "2017-12-22" @default.
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- W2775709648 date "2018-01-01" @default.
- W2775709648 modified "2023-09-24" @default.
- W2775709648 title "Effect of pH value on structural and photoluminescence properties of Tb3+ -doped Lu2O3 nanopowders synthesized by sol–gel route" @default.
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- W2775709648 doi "https://doi.org/10.1016/j.optmat.2017.11.048" @default.
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