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- W2896048989 abstract "A set of Eu3+, Dy3+ and Tb3+ doped novel scheelite-type LiCaGd(WO4)3 (LCGW)-based phosphors was prepared via a conventional solid-state reaction method. The X-ray diffraction (XRD), transmission electron microscopy (TEM) analysis, characteristics of luminescence, PL thermostability, decay lifetimes, as well as CIE coordination were investigated to characterize the as-prepared samples in detail. The XRD analysis indicated that the Eu3+, Dy3+ and Tb3+ ions were incorporated into the LCGW host lattice. Under the ultraviolet radiation, the characteristic emission lines of Eu3+ (5D0–7F2), Dy3+ (4F9/2–6H13/2) and Tb3+ (5D4–7F5) ions were observed. The Eu3+ and Tb3+ single-doped LCGW fluorescent powders showed bright red and green emissions, respectively, without concentration quenching. As well as the Dy3+ doped LCGW phosphors radiate a strong yellow light at optimal Dy3+ concentration 0.08 mol. The efficient energy transfer phenomenon was observed for the Eu3+/Dy3+ and Tb3+/Dy3+ ions. The emission color of the LCGW:xTb3+/0.08Dy3+ samples was tuned from yellow (0.4074, 0.4727) to green (0.3604, 0.5521) via adjusting the Tb3+ concentration. The emission color of LCGW:yEu3+/0.08Dy3+ can be tuned from yellow (0.491, 0.3856) to red (0.5694, 0.3512) by variation of the Eu3+/Dy3+ ratio. Additionally, the thermal stability of the luminescence in the LCGW phosphors doped by Eu3+, Tb3+, Dy3+ ions was studied. The results verified that the LCGW:Ln3+ (Ln = Tb, Eu, Dy) phosphors are promising for applications in white LEDs." @default.
- W2896048989 created "2018-10-26" @default.
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- W2896048989 date "2019-02-01" @default.
- W2896048989 modified "2023-10-14" @default.
- W2896048989 title "Multi-color luminescence evolution and efficient energy transfer of scheelite-type LiCaGd(WO4)3:Ln3+ (Ln = Eu, Dy, Tb) phosphors" @default.
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- W2896048989 doi "https://doi.org/10.1016/j.ceramint.2018.10.074" @default.
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