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Ce3+对Er3+/Yb3+共掺TeO2-WO3-ZnO玻璃发光性能的影响

李家成 薛天锋 范有余 李顺光 胡和方

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Ce3+对Er3+/Yb3+共掺TeO2-WO3-ZnO玻璃发光性能的影响

李家成, 薛天锋, 范有余, 李顺光, 胡和方

Effect of introducing Ce3+ on the emission properties of Er3+/Yb3+-doped TeO2-WO3-ZnO glasses

Li Jia-Cheng, Xue Tian-Feng, Fan You-Yu, Li Shun-Guang, Hu He-Fang
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  • 在Er3+/Yb3+共掺TeO2-WO3-ZnO玻璃中引入Ce3+,研究了Ce3+对Er3+1.5μm发射性能及其上转换发光性能的影响。结果表明,随Ce3+浓度的增加Er3+1.5μm波段的荧光强度先增强后降低,优化的Ce3+掺杂浓度在2.07×1020/cm3左右;1.5μm波段的荧光寿命则随Ce3+浓度的增加有轻微降低,从3.4ms降到3.0ms,但Ce3+浓度的增加对1.5μm波段的荧光半高宽基本无影响;Er3+/Ce3+间的交叉弛豫Er3+(4I11/2)+Ce3+(2F5/2)→Er3+(4I13/2)+Ce3+(2F7/2)使玻璃的上转换发光强度大大降低,但在过高的Ce3+浓度下,Er3+/Ce3+间的另一交叉弛豫Er3+(4I13/2)+Ce3+(2F5/2)→Er3+(4I15/2)+Ce3+(2F7/2)则使Er3+4I13/2能级粒子数减少,导致1.5μm波段荧光强度和荧光寿命降低.
    Ce3+ ions were introduced into the Er3+/Yb3+-codoped TeO2-WO3-ZnO glasses, and the effect of Ce3+ on the emission properties at 1.5μm band and the upconversion luminescence of Er3+ in the glasses was investigated. With the increasing of Ce3+ concentration, the emission intensity of Er3+ at 1.5μm band increases firstly, and then decreases. The optimal doping concentration of Ce3+ is about 2.07×1020/cm3. As for the Er3+ emission at 1.5-μm band, the fluorescence lifetime decreases a little from 3.4ms to 3.0ms, while the full width at half maximum (FWHM) hardly changes with the increase of Ce3+ concentration. Due to the effective cross relaxation between Ce3+ and Er3+: Er3+(4I11/2)+Ce3+(2F5/2)→Er3+(4I13/2)+Ce3+(2F7/2), the upconversion emission intensity of Er3+ is reduced greatly. But when Ce3+-doping concentration is too high, the other cross relaxation between Ce3+ and Er3+: Er3+(4I13/2)+Ce3+(2F5/2)→Er3+(4I15/2)+Ce3+(2F7/2) happens, which depopulates the 4I13/2 level of Er3+ and results in the decrease of the emission intensity and fluorescence lifetime of Er3+ at 1.5μm band.
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出版历程
  • 收稿日期:  2005-05-26
  • 修回日期:  2005-07-19
  • 刊出日期:  2006-01-05

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