Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1520819 | Materials Chemistry and Physics | 2016 | 8 Pages |
Abstract
In this paper, we describe the use of self-fluorinating conditions for the thermal treatment of Sr1âxâyâzYbxEry(NH4)zF2+x+yâz precursor for the preparation of high-efficiency SrF2:Yb:Er up-converter powders. We report actual SrF2:Yb:Er compositions with up-conversion efficiencies exceeding 4% (pumping power 1 W/cm2 at 974 nm wavelength) and describe the synthesis of ceramics with higher than 80% transmittance at 0.42-7.0 μm. The latter ceramics can be used as a potential IR radiation visualizer. For the first time, we present an analysis of correlation between up-conversion luminescence energy yield and specimen composition for SrF2:Yb:Er nanopowders. Taking into account the observed erbium ion up-conversion luminescence in the red part of the visible spectrum, we recommend certain SrF2:Yb:Er compositions for practical application in photodynamic cancer therapy.
Related Topics
Physical Sciences and Engineering
Materials Science
Electronic, Optical and Magnetic Materials
Authors
Yu. A. Rozhnova, S.V. Kuznetsov, A.A. Luginina, V.V. Voronov, A.V. Ryabova, D.V. Pominova, R.P. Ermakov, V.A. Usachev, N.E. Kononenko, A.E. Baranchikov, V.K. Ivanov, P.P. Fedorov,