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Issue 5, 2011
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Efficient oxide phosphors for light upconversion; green emission from Yb3+ and Ho3+ co-doped Ln2BaZnO5 (Ln = Y, Gd)

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Abstract

The optical properties of Yb3+ and Ho3+ co-doped Y2BaZnO5, synthesized by solid-state reactions, are investigated in detail. Under 977 nm excitation (∼25 × 10−3 W mm−2), bright green upconversion emission is observed. Concentration dependence studies at room temperature show that relatively high infrared to visible upconversion efficiencies are obtained with values up to ∼2.6%. The results of power dependence studies and temperature-dependent lifetime measurements allow us to determine the dominant upconversion mechanisms in Yb3+:Ho3+ co-doped Y2BaZnO5oxides. The materials presented in this article constitute new and efficient upconversion phosphors which may find utility in a variety of applications.

Graphical abstract: Efficient oxide phosphors for light upconversion; green emission from Yb3+ and Ho3+ co-doped Ln2BaZnO5 (Ln = Y, Gd)

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Publication details

The article was received on 28 May 2010, accepted on 15 Jul 2010 and first published on 20 Aug 2010


Article type: Paper
DOI: 10.1039/C0JM01652G
Citation: J. Mater. Chem., 2011,21, 1387-1394
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    Efficient oxide phosphors for light upconversion; green emission from Yb3+ and Ho3+ co-doped Ln2BaZnO5 (Ln = Y, Gd)

    I. Etchart, I. Hernández, A. Huignard, M. Bérard, William. P. Gillin, Richard. J. Curry and A. K. Cheetham, J. Mater. Chem., 2011, 21, 1387
    DOI: 10.1039/C0JM01652G

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