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    Synthesis and luminescence properties of glass ceramics containing MSiO<inf>3</inf>:Eu<sup>2</sup> (M=Ca, Sr, Ba) phosphors for white LED

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    Authors
    Cui, Z.
    Jia, Guohua
    Deng, D.
    Hua, Y.
    Zhao, S.
    Huang, L.
    Wang, H.
    Ma, H.
    Xu, S.
    Date
    2012
    Type
    Journal Article
    
    Metadata
    Show full item record
    Citation
    Cui, Z. and Jia, G. and Deng, D. and Hua, Y. and Zhao, S. and Huang, L. and Wang, H. et al. 2012. Synthesis and luminescence properties of glass ceramics containing MSiO<inf>3</inf>:Eu<sup>2</sup> (M=Ca, Sr, Ba) phosphors for white LED. Journal of Luminescence. 132 (1): pp. 153-160.
    Source Title
    Journal of Luminescence
    DOI
    10.1016/j.jlumin.2011.08.009
    ISSN
    0022-2313
    School
    Nanochemistry Research Institute
    URI
    http://hdl.handle.net/20.500.11937/33851
    Collection
    • Curtin Research Publications
    Abstract

    Eu2 doped silicate glasses were prepared of the system 52SiO248MO: xEu2(in molar ratio, M=Ca, Sr, Ba; x=1, 3, 5, 7, 9) by a high temperature melt-quenching method in a reducing atmosphere. Glass ceramics containing MSiO3:Eu2(M=Ca, Sr, Ba) nano-phosphors were obtained after the heat treatment of the glass samples. The excitation, emission spectra and lifetime decay curves of 4f65d 1?4f7 of Eu2 were measured and interpreted with respect to their crystal structures and multi-site occupations of divalent europium in the hosts. Their excitation bands mainly extend from 450 to 250 nm, which is adaptable to the main emission region of the UV LED chip. With UV light excitation, the Eu2 emission in CaSiO3, SrSiO 3 and BaSiO3 shows blue, green and yellow colors centered at 440, 505 and 555 nm, respectively. The critical Eu2concentration was studied and determined to be x=5 for both CaSiO3 and SrSiO 3 and x=7 for BaSiO3 phosphors. The results show that the Eu2 doped glass ceramic phosphors containing MSiO3 (M=Ca, Sr, Ba) nano-crystals can be used as potential matrix materials for a high power white LED pumped by the UV LED chip. © 2011 Elsevier B.V. All rights reserved.

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