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Issue 40, 2013
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Enhancing the color purity of the green upconversion emission from Er3+/Yb3+-doped GdVO4 nanocrystals via tuning of the sensitizer concentration

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Abstract

Here we report on the enhancement of the intensity of the green/red emission ratio in Er3+/Yb3+-doped GdVO4 nanocrystals obtained via the upconversion process. The nanocrystals were synthesized using a sol–gel process followed by a solid-state reaction. A series of samples bearing different sensitizer ion (Yb3+) concentrations were studied and characterized. Tripositive erbium (Er3+)-doped GdVO4 shows two strong emissions in the green region near 525 and 550 nm while a relatively weak red emission is centred at 660 nm. A 5-fold increase in the intensity of the green/red emission ratio is observed for the Er3+/Yb3+-doped GdVO4 sample co-doped with 20 mol% Yb3+ concentration in comparison to a similar sample without any Yb3+. This suggests a corresponding increase in the color purity of the green emission and as a consequence, this material would be an interesting candidate as a phosphor for display and LED applications.

Graphical abstract: Enhancing the color purity of the green upconversion emission from Er3+/Yb3+-doped GdVO4 nanocrystals via tuning of the sensitizer concentration

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Publication details

The article was received on 10 Jul 2013, accepted on 25 Aug 2013 and first published on 19 Sep 2013


Article type: Paper
DOI: 10.1039/C3TC31328J
Citation: J. Mater. Chem. C, 2013,1, 6536-6540
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    Enhancing the color purity of the green upconversion emission from Er3+/Yb3+-doped GdVO4 nanocrystals via tuning of the sensitizer concentration

    V. Mahalingam, C. Hazra, R. Naccache, F. Vetrone and J. A. Capobianco, J. Mater. Chem. C, 2013, 1, 6536
    DOI: 10.1039/C3TC31328J

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