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Synthesis and Fluorescence Quantum Yield of Gd<sub>1－x</sub>Eu<sub>x</sub>OOH Crystals
Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
- 1 Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
- 2 Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
- 3 Graduate School of Maritime Sciences, Kobe University, Kobe, Japan
- 4 International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
Journal of Materials Science and Chemical Engineering·Volume 02 (2014)·Pages 23–29·Published 18 March 2014·DOI10.4236/msce.2014.23003
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Abstract
Eu 3+ -doped gadolinium oxyhydroxide Gd 1-x Eu x OOH crystals were synthesized by the flux method. The X-ray diffraction data for the crystals were well refined assuming a monoclinic structure with the P 2 1 / m space group. Gd 1-x Eu x OOH (x ≤ 0.2) crystals showed strong red emission, and the highest fluorescence quantum yield ( Φ f ) was 0.27, obtained for x = 0.10. Φ f decreased rapidly as the Eu 3+ content x increased above 0.2, owing to concentration quenching. Analysis with a percolation model indicated three-dimensional energy transfer between the Eu 3+ ions.
KeywordsGadolinium OxyhydroxideFluorescence Quantum YieldPercolation Model
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