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Preparation and White Light Emission in Dy3+/Tb3+ Codoped Glass Ceramics Containing NaYF4 Nanocrystals

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Dy3+/Tb3+ codoped oxyfluoride aluminosilicate glass ceramics containing α-NaYF4 nanocrystals were prepared by high temperature melt-quenching and subsequent thermal treatment method. The formation of α-NaYF4 nanocrystals were verified by XRD measurement. TEM micrograph demonstrated that spherical crystallites sized 20–30 nm distributed homogeneously among the glass matrix and EDX spectra indicated that Dy3+ ions was incorporated into the precipitated α-NaYF4 nanocrystals. Intense emission bands centered at 480 nm and 571 nm were observed in the Dy3+-doped precursor glass and glass ceramics and the intensity ratio of the yellow-to-blue emissions changed greatly. In the Dy3+, Tb3+ codoped glass ceramics, besides the emission bands from Dy3+ ions, strong green bands at the 540 nm, weak blue emission band at 485 nm and red emission at 615 nm of Tb3+ ions are simultaneously observed. The glass ceramic generates intense white light emission, indicative of their potential applications as the luminescent host for W-LEDs.
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Keywords: GLASS CERAMICS; LUMINESCENCE; OPTICAL MATERIALS; WHITE LEDS

Document Type: Short Communication

Publication date: March 1, 2017

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  • Nanoscience and Nanotechnology Letters (NNL) is a multidisciplinary peer-reviewed journal consolidating nanoscale research activities in all disciplines of science, engineering and medicine into a single and unique reference source. NNL provides the means for scientists, engineers, medical experts and technocrats to publish original short research articles as communications/letters of important new scientific and technological findings, encompassing the fundamental and applied research in all disciplines of the physical sciences, engineering and medicine.
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