期刊
JOURNAL OF LUMINESCENCE
卷 183, 期 -, 页码 251-258出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.jlumin.2016.11.017
关键词
YAG; Dy; SCS; Raman spectroscopy; Photoluminescence
类别
资金
- FCT - Portuguese Foundation for Science and Technology [UID/CTM/50025/2013, RECI-II/FIS-NAN/0183/2012 (FCOMP-01-0124-FEDER-027494)]
- FEDER under the COMPETE 2020 program
Dysprosium-doped yttrium aluminum garnet (YAG:Dy) phosphor was successfully produced by a Solution Combustion Synthesis (SCS) using a mixture of two fuels (urea and glycine). The effects of Dy concentration and annealing temperature were studied by X-ray diffraction (XRD), Raman spectroscopy (RS), photoluminescence (PL) and photoluminescence excitation (PLE). X-ray diffraction results show that the phosphors are single phase YAG with crystallite size ranging from 45 to 82 nm. Raman spectroscopy corroborates these results and show that the introduction of Dy ions in the YAG lattice results in additional Raman modes. Room temperature photoluminescence results confirm the introduction of the ion in the host lattice and its optical activation for all the Dy concentrations. CIE1931 color coordinates show that the samples' emission lays in the near white region. The highest intraionic emission intensity was achieved for a Dy concentration of 2 mol% and annealing temperature of 1400 degrees C. Photoluminescence excitation results show that the ions luminescence is preferential excited with 351.8 and 365.8 nm wavelength photons. (C) 2016 Elsevier B.V. All rights reserved.
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