Synthesis and Fluorescence Quantum Yield of Gd_1－xEu_xOOH Crystals

Hiroaki Samata, Daisuke Itakura, Shungo Imanaka, Tadashi C. Ozawa

Graduate School of Maritime Sciences, Kobe University, Kobe, Japan.
International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan.

DOI: 10.4236/msce.2014.23003                

Abstract

Eu³⁺-doped gadolinium oxyhydroxide Gd_1-xEu_xOOH crystals were synthesized by the flux method. The X-ray diffraction data for the crystals were well refined assuming a monoclinic structure with the P2₁/m space group. Gd_1-xEu_xOOH (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 Eu³⁺ content x increased above 0.2, owing to concentration quenching. Analysis with a percolation model indicated three-dimensional energy transfer between the Eu³⁺ ions.

Keywords

Gadolinium Oxyhydroxide; Fluorescence Quantum Yield; Percolation Model

Conflicts of Interest

The authors declare no conflicts of interest.

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