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Issue 4, 2013
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A novel orange-yellow-emitting Ba3Lu(PO4)3:Eu2+,Mn2+ phosphor with energy transfer for UV-excited white LEDs

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Abstract

Eu2+–Mn2+ codoped orange-yellow-emitting Ba3Lu(PO4)3 phosphors were synthesized by a solid-state reaction. The synthesis, structure refinement, and luminescence properties of the obtained phosphor were first investigated in detail. The crystal structure was refined with a split-atom model, where the oxygen atoms are distributed over two partially occupied sites. The refinement confirmed that BLuP:0.005Eu2+,0.06Mn2+ has a cubic unit cell with space group I[4 with combining macron]3d (no. 220), cell parameters a = b = c = 10.4025 Å and Z = 4. The luminescent properties reveal that the developed phosphor can efficiently convert UV photons in a broad range from 230 to 430 nm into orange-yellow emission. On the basis of the luminescence spectra and fluorescence decay curves, we confirm that the energy transfer process from the Eu2+ to Mn2+ ions takes place in the codoped Ba3Lu(PO4)3:Eu2+,Mn2+ phosphor, and the energy transfer efficiency increases with an increase in the Mn2+ content. The possible energy transfer mechanism was proposed in terms of the experimental results and analysis. In particular, our developed phosphor contains a larger amount of the red-emitting component, compared with the commercial YAG:Ce phosphor, possessing favorable properties for application in warm white LEDs with low correlated color temperature.

Graphical abstract: A novel orange-yellow-emitting Ba3Lu(PO4)3:Eu2+,Mn2+ phosphor with energy transfer for UV-excited white LEDs

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Publication details

The article was received on 24 Jul 2012, accepted on 04 Oct 2012 and first published on 04 Oct 2012


Article type: Paper
DOI: 10.1039/C2DT31657A
Citation: Dalton Trans., 2013,42, 941-947
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    A novel orange-yellow-emitting Ba3Lu(PO4)3:Eu2+,Mn2+ phosphor with energy transfer for UV-excited white LEDs

    N. Guo, Y. Huang, Y. Jia, W. Lv, Q. Zhao, W. Lü, Z. Xia and H. You, Dalton Trans., 2013, 42, 941
    DOI: 10.1039/C2DT31657A

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