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- W2066382011 abstract "Abstract Transparent crystallized glasses consisting of nonlinear optical Ba2TiSi2O8 nanocrystals (diameter: ∼100 nm) are prepared through the crystallization of 40BaO–20TiO2–40SiO2–0.5Dy2O3 glass (in the molar ratio), and photoluminescence quantum yields of Dy3+ ions in the visible region are evaluated directly by using a photoluminescence spectrometer with an integrating sphere. The incorporation of Dy3+ ions into Ba2TiSi2O8 nanocrystals is confirmed from the X-ray diffraction analyses. The total quantum yields of the emissions at the bands of 4F9/2→6H15/2 (blue: 484 nm), 4F9/2→6H13/2 (yellow: 575 nm), and 4F9/2→6H11/2 (red: 669 nm) in the crystallized glasses are ∼15%, being about four times larger compared with the precursor glass. It is found that the intensity of yellow (575 nm) emissions and the branching ratio of the yellow (575 nm)/blue (484 nm) intensity ratio increase largely due to the crystallization. It is suggested from Judd–Ofelt analyses that the site symmetry of Dy3+ ions in the crystallized glasses is largely distorted, giving a large increase in the yellow emissions. It is proposed that Dy3+ ions substitute Ba2+ sites in Ba2TiSi2O8 nanocrystals." @default.
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- W2066382011 date "2009-02-01" @default.
- W2066382011 modified "2023-09-25" @default.
- W2066382011 title "Enhanced quantum yield of yellow photoluminescence of Dy3+ ions in nonlinear optical Ba2TiSi2O8 nanocrystals formed in glass" @default.
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- W2066382011 doi "https://doi.org/10.1016/j.jssc.2008.10.028" @default.
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