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研究了能量接受离子Ce3+对Er3+上转换发光强度以及Er3+在1.5μm附近波段发光性能参数的影响,并从能量匹配及能级结构角度出发对Er3+Ce3+间的能量转移机制进行了分析.分析认为,4I112能级的Er3+通过无辐射能量转移把能量传递给2F52能级的Ce3+激发其跃迁至2F72能级,而4I112能级上的Er3+则无辐射弛豫至4I132能级,从而有效降低氟磷酸盐玻璃中Er3+的上转换发光.当Er3+浓度为1.11×1020cm-3时,Ce3+的最佳掺杂浓度为2.22×1020cm-3,此时Ce3+的引入不仅可以降低上转换发光,而且有助于提高Er3+在1.5μm附近波段的荧光强度、发射截面以及4I132能级荧光寿命.
The effects of Ce3 + on the upconversion luminescence intensity of Er3 + and the luminescence properties of Er3 + in the band near 1.5μm have been studied, and the energy transfer mechanism between Er3 + Ce3 + has been analyzed from the energy match and energy level structure. , Er3 + of 4I112 level transfers energy to Ce3 + of 2F52 level through non-radiative energy transfer to stimulate its transition to 2F72 level, while Er3 + of 4I112 level has no radiation relaxation to 4I132 level, thus effectively reducing fluorophosphate When Er3 + concentration is 1.11 × 1020cm-3, the optimal doping concentration of Ce3 + is 2.22 × 1020cm-3. At this time, the introduction of Ce3 + can not only reduce the upconversion luminescence, but also help Fluorescence intensity, emission cross section and 4I132 level fluorescence lifetime of Er3 + in the band near 1.5μm were improved.