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- W574635969 abstract "In this work, Eu3+ doped Y2O3 hexagonal prisms were synthesized by a novel two-phase approach, which involves water at the bottom as aqueous phase and oleylamine in the above as oil phase. With this unique reaction system, precursors of hexagonal prisms Y4O(OH)9(NO3) were first obtained by simply varying the volume ratio of water to oleylamine. Time-dependent experiments were systematically performed to reveal the growth mechanism of the precursor. After subsequent heat treatment, these precursors transformed to Y2O3 hexagonal prisms with controlled diameters and aspect ratios varying from 4 to 19. Such a transformation is preceded via a topotactic process, as indicated by TG-DTA and mass spectra. Eventually, all Eu3+ doped Y2O3 hexagonal prisms were found to exhibit an intensive red emission at 611 nm, which corresponds to 5D0→7F2 transition of Eu3+. With varying the aspect ratio of hexagonal prisms and increasing Eu3+ concentration in Y2O3, an optimum external quantum efficiency was achieved." @default.
- W574635969 created "2016-06-24" @default.
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- W574635969 date "2015-10-01" @default.
- W574635969 modified "2023-10-15" @default.
- W574635969 title "Eu3+-doped Y2O3 hexagonal prisms: Shape-controlled synthesis and tailored luminescence properties" @default.
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- W574635969 doi "https://doi.org/10.1016/j.jallcom.2015.06.016" @default.
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