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  • AIP Publishing  (2)
  • Chiang, Chung-Hao  (2)
  • 2010-2014  (2)
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  • AIP Publishing  (2)
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  • 2010-2014  (2)
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  • 1
    Online Resource
    Online Resource
    Effects of Sr2+ substitution on photoluminescence characteristics of Ba1−x−ySryZrSi3O9:xEu2+ phosphors
    AIP Publishing ; 2014
    In:  Journal of Applied Physics Vol. 116, No. 22 ( 2014-12-14)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 116, No. 22 ( 2014-12-14)
    Abstract: In this work, single-phase Ba1−x−ySryZrSi3O9:xEu2+ phosphors were synthesized via the solid-state reaction method. The crystal structure and luminescence properties were investigated using X-ray diffraction and photoluminescence measurements, respectively. An increase of the dopant Sr2+ increased the emission intensity of the phosphors. The peak intensity of the samples was at y = 0.4 under near-ultraviolet light excitation (397 nm). The wavelength of the emission peaks red-shifts slightly from 477 to 483 nm due to the splitting of the 5d energy level. Sr2+ ions have a smaller ionic radius than that of Ba2+ ions, and thus the dopant changes the crystal structure, improving the energy transfer efficiency between luminescence centers. More Eu2+ solid solubility was found in Ba0.6−xSr0.4ZrSi3O9:xEu2+ phosphors (10 mol. %) than in the host BaZrSi3O9 (6 mol. %), which enhanced the emission intensity. In addition, the thermal reliability of the phosphors was studied.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4903531
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2014
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
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    Online Resource
  • 2
    Online Resource
    Online Resource
    Effects of flux additives on the characteristics of Y2.95Al5O12:0.05Ce3+ phosphor: Particle growth mechanism and luminescence
    AIP Publishing ; 2013
    In:  Journal of Applied Physics Vol. 114, No. 24 ( 2013-12-28)
    Details
    In: Journal of Applied Physics, AIP Publishing, Vol. 114, No. 24 ( 2013-12-28)
    Abstract: The dependence of the amount of the BaF2 flux additive on the luminescence of Y2.95Al5O12:0.05Ce3+ phosphors was investigated. The integrated emission intensity of Y2.95Al5O12:0.05Ce3+ prepared without the flux was enhanced by 29% with the addition of BaF2 flux at the optimum amount of 6 wt. %. Such an enhancement can be attributed to the purer phase of Y3Al5O12 and the morphology change from the irregular shape to spherical shape with the smoother surface due to the flux. The morphology and luminescence of Y2.95Al5O12:0.05Ce3+ prepared with the 6 wt. % BaF2 flux additive (Sample II) were further compared with those of Y2.95Al5O12:0.05Ce3+ prepared with the 7 wt. % H3BO3 flux additive (Sample I). The particle size, particle shape, and integrated emission intensity (λex = 450 nm) of the former were found to be larger, more regular, and 6% higher than those of the latter. The difference in the morphology of Samples I and II, which led to the difference in the emission intensity and the external quantum efficiency, were well explained by the particle growth mechanism.
    Type of Medium: Online Resource
    ISSN: 0021-8979 , 1089-7550
    URL: Article
    DOI: 10.1063/1.4858427
    Language: English
    Publisher: AIP Publishing
    Publication Date: 2013
    detail.hit.zdb_id: 220641-9
    detail.hit.zdb_id: 3112-4
    detail.hit.zdb_id: 1476463-5
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    Online Resource
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