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Issue 39, 2016
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Triple molybdate scheelite-type upconversion phosphor NaCaLa(MoO4)3:Er3+/Yb3+: structural and spectroscopic properties

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Abstract

Triple molybdate NaCaLa(1−xy)(MoO4)3:xEr3+,yYb3+ (x = y = 0, x = 0.05 and y = 0.45, x = 0.1 and y = 0.2, x = 0.2 and y = 0) phosphors were successfully synthesized for the first time by the microwave sol–gel method. Well-crystallized particles formed after heat treatment at 900 °C for 16 h showed a fine and homogeneous morphology with particle sizes of 2–3 μm. The structures were refined by the Rietveld method in the space group I41/a. The optical properties were examined comparatively using photoluminescence emission and Raman spectroscopy. Under excitation at 980 nm, the NaCaLa0.7(MoO4)3:0.1Er3+,0.2Yb3+ and NaCaLa0.5(MoO4)3:0.05Er3+,0.45Yb3+ particles exhibited a strong 525 nm emission band, a weaker 550 nm emission band in the green region, and three weak 655 nm, 490 nm and 410 nm emission bands in the red, blue and violet regions. The pump power dependence and Commission Internationale de L'Eclairage chromaticity of the upconversion emission intensity were evaluated in detail.

Graphical abstract: Triple molybdate scheelite-type upconversion phosphor NaCaLa(MoO4)3:Er3+/Yb3+: structural and spectroscopic properties

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Publication details

The article was received on 15 Jun 2016, accepted on 24 Aug 2016 and first published on 31 Aug 2016


Article type: Paper
DOI: 10.1039/C6DT02378A
Dalton Trans., 2016,45, 15541-15551
  • Open access: Creative Commons BY license
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    Triple molybdate scheelite-type upconversion phosphor NaCaLa(MoO4)3:Er3+/Yb3+: structural and spectroscopic properties

    C. S. Lim, A. S. Aleksandrovsky, M. S. Molokeev, A. S. Oreshonkov, D. A. Ikonnikov and V. V. Atuchin, Dalton Trans., 2016, 45, 15541
    DOI: 10.1039/C6DT02378A

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