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Issue 32, 2015
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Crystal structure refinement and luminescence properties of blue-green-emitting CaSrAl2SiO7:Ce3+,Li+,Eu2+ phosphors

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Abstract

Ce3+/Li+,Eu2+ singly doped and Ce3+/Li+/Eu2+-co-doped CaSrAl2SiO7 phosphors have been prepared using the conventional solid-state reaction method. The crystal structure of the melilite-type CaSrAl2SiO7 phase and the preferred crystallographic positions of the doped ions were refined using the Rietveld method. The luminescence properties and energy transfer of CaSrAl2SiO7:Ce3+,Li+,Eu2+ were studied in detail. The Ce3+/Li+ activated CaSrAl2SiO7 phosphor has a strong absorption band in the range of 200–450 nm and shows a blue emission centered at 477 nm. When Eu2+ ions are co-doped with Ce3+/Li+, the emission color of CaSrAl2SiO7:Ce3+,Li+,Eu2+ phosphors under the irradiation of 365 nm can be tuned from blue to green via the energy transfer from Ce3+ to Eu2+ ions. Also the involved energy transfer process and the corresponding mechanism between Ce3+ and Eu2+ have been discussed in detail. These results indicate that the as-reported CaSrAl2SiO7:Ce3+,Li+,Eu2+ phosphors have potential applications in near-UV chip pumped white LEDs.

Graphical abstract: Crystal structure refinement and luminescence properties of blue-green-emitting CaSrAl2SiO7:Ce3+,Li+,Eu2+ phosphors

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Publication details

The article was received on 04 Jun 2015, accepted on 04 Jul 2015 and first published on 07 Jul 2015


Article type: Paper
DOI: 10.1039/C5TC01629K
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J. Mater. Chem. C, 2015,3, 8322-8328

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    Crystal structure refinement and luminescence properties of blue-green-emitting CaSrAl2SiO7:Ce3+,Li+,Eu2+ phosphors

    S. Miao, Z. Xia, M. S. Molokeev, J. Zhang and Q. Liu, J. Mater. Chem. C, 2015, 3, 8322
    DOI: 10.1039/C5TC01629K

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