1. Role of charge transfer state and host matrix in Eu3+-doped alkali and earth alkali fluoro-aluminoborate glasses
- Author
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Thanh, N.T., Quang, V.X., Tuyen, V.P., Tam, N.V., Hayakawa, T., and Huy, B.T.
- Subjects
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CHARGE transfer , *RARE earth ions , *DOPED semiconductors , *ALKALI metals , *BORATE glass , *FLUORESCENCE spectroscopy , *SULFATES - Abstract
Abstract: Judd–Ofelt parameters of Eu3+-doped alkali and earth alkali fluoro-aluminoborate glasses are determined from the fluorescence spectra. The dependence of these parameters on the compositional changes of the materials is discussed. The glass containing sulphate component shows the larger values of Ω compared with the fluoro-aluminoborate glasses because of higher ΔCT (Eu3+–F−) values. The difference of ionic radius and electronegativity between Na and Ca lead to higher Ω 2 parameter of CaF2–Al2O3–B2O3:Eu3+ glass. Persistent spectral hole burning has been observed in Eu3+ ions doped alkali-and earth alkali fluoro-aluminoborate glasses with the compositions of 16NaF·73B2O3·8Al2O3·3Eu2O3 and 16CaF2·73B2O3·8Al2O3·3Eu2O3, which have been prepared using conventional melting technique. [Copyright &y& Elsevier]
- Published
- 2012
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