Spectroscopic study of Eu³⁺-doped and Eu³⁺,Y³⁺-codoped SiO₂ sol–gel glasses

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• 作者：Jia ; Weiyi ; Liu ; Huimin ; Felofilov ; Sergey P. ; Meltzer ; Richard ; Jiao ; Jun
• 关键词：Photoluminescence ; Hole burning ; Nanoclusters ; Eu³⁺&ndash ; SiO₂
• 刊名：Journal of Alloys and Compounds
• 出版年：2000
• 期刊代码：45_09258388
• 类别：ms
• 出版时间：October 12, 2000
• 卷：311
• 期：1
• 页码：11-15
• 文件大小：133 K

摘要

Eu³⁺-doped and Eu³⁺,Y³⁺-codoped SiO₂ glasses were prepared through sol–gel technology. Effects of annealing on the spectroscopic properties, including photoluminescence, decay processes and spectral hole burning, were investigated. It was found that clusterization of Eu and Eu–Y may take place during the annealing process, and the environment of Eu ions was changed from a site of near inversion symmetry to one with more non-inversion character, resulting in an increase of the ⁵D₀→⁵F₂ transitions relative to that of the transitions to ⁵F₀ and ⁵F₁. The affects of clusterization on the spectroscopic properties are discussed.