Solid state synthesis and tunable luminescence of Li2SrSiO4:Eu2+/Ce3+ phosphors

•Emission band at 556nm of Li2SrSiO4:Eu2+ phosphors.•Emission band at 425nm of Li2SrSiO4:Ce3+ phosphors.•Tunable luminescence of Li2SrSiO4:Ce3+/Eu2+ phosphors.•Energy transfer between Ce3+ and Eu2+ in Li2SrSiO4 host. Li2SrSiO4:Eu2+/Ce3+ phosphors have been synthesized by solid state reaction. Eu2+ a...

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Published in:Chemical physics letters 2016-03, Vol.648, p.8-12
Main Authors: Wei, Zhen, Wang, Yongli, Zhu, Xiaobo, Guan, Jinyu, Mao, Weixi, Song, Juanjuan
Format: Article
Language:English
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Summary:•Emission band at 556nm of Li2SrSiO4:Eu2+ phosphors.•Emission band at 425nm of Li2SrSiO4:Ce3+ phosphors.•Tunable luminescence of Li2SrSiO4:Ce3+/Eu2+ phosphors.•Energy transfer between Ce3+ and Eu2+ in Li2SrSiO4 host. Li2SrSiO4:Eu2+/Ce3+ phosphors have been synthesized by solid state reaction. Eu2+ and/or Ce3+ doped Li2SrSiO4 have the hexagonal crystal structure, indicating the doped Eu2+ and/or Ce3+ ions have no influence on the crystal structure of Li2SrSiO4. Under the excitation at 365nm, Eu2+ or Ce3+ doped Li2SrSiO4 phosphors give characteristic emission bands of Eu2+ or Ce3+, respectively. For Li2SrSiO4:Eu2+/Ce3+ phosphors with the fixed Ce3+ concentration, two emission bands originating from Eu2+ and Ce3+ can be observed. On the basis of luminescent properties of Li2SrSiO4:Eu2+/Ce3+ phosphors, we can conclude that energy transfer from Ce3+ to Eu2+ occurs in Li2SrSiO4.
ISSN:0009-2614
1873-4448
DOI:10.1016/j.cplett.2016.01.068