The effect of PbF₂ content on the microstructure and upconversion luminescence of Er³⁺-doped SiO₂–PbF₂–PbO glass ceramics

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• 作者：Fanqing Zeng ; Guozhong Ren ; Xiannian Qiu ; Qibin Yang ; Jingwu Chen
• 关键词：Crystal growth ; Glass ceramics ; Nanocrystals ; Upconversion
• 刊名：Journal of Non-Crystalline Solids
• 出版年：2008
• 期刊代码：50_00223093
• 类别：ms
• 出版时间：1 July 2008
• 卷：354
• 期：29
• 页码：3428-3432
• 文件大小：354 K

摘要

The Er³⁺ doped transparent oxyfluoride glass ceramics were obtained by appropriate heat treatment of the precursor glasses with composition (mol%) 50SiO₂–xPbF₂–(50 − x)PbO–0.5ErF₃. The microstructure and optical properties of the glasses and glass ceramics were determined by differential scanning calorimetry (DSC), X-ray diffraction (XRD), absorption spectra and luminescence spectra. The intensity of upconversion luminescence significantly increased in glass ceramics compared to that in precursor glass. The emission bands centered around 660 nm (⁴F_9/2 → ⁴I_15/2) and 410 nm (²H_9/2 → ⁴I_15/2) were simultaneously observed in glass ceramics but cannot be seen in the corresponding precursor glass. The influence of different PbF₂ content on the microstructure and upconversion luminescence of the samples was analyzed in detail. The results indicated that with the increase of PbF₂ content, the Ω₂ was almost the same and the ratios of red to green upconversion luminescence decreased in glass ceramics.