无容器制备Er3+/Yb3+共掺La2O3-TiO2-ZrO2玻璃及其上转换发光研究

doi:10.15541/jim20140155

摘要/Abstract

摘要：

利用无容器技术制备了(La_0.94-_xEr_0.06Yb_x)(Ti_0.95Zr_0.05)_2.25O₆(x=0~0.24, 间隔0.04)球状透明玻璃, 其稀土离子掺杂浓度最大值达到30%。通过DTA分析发现, 玻璃具有很好的热稳定性, x=0时玻璃化转变温度T_g和析晶起始温度T_o分别为818℃和906℃, ΔT(ΔT= T_o-T_g)为88℃, 玻璃形成能力较低。随着Yb³⁺浓度提高, T_g、T_o和ΔT逐渐下降, 说明Yb³⁺降低了玻璃的热稳定性和形成能力。利用紫外可见分光光度计测定了样品的吸收/透过光谱, 玻璃在975 nm具有很强的吸收峰, 表明Yb³⁺可以有效提高玻璃对入射光的吸收强度; 在可见光范围内除特征吸收外具有近70%的透过率, 说明玻璃具有良好的透可见光性能, 有望获得高强上转换发光输出。上转换荧光光谱研究表明: 在980 nm激光泵浦下, 获得了中心位于535、554和672 nm处的绿、红发光带, x=0.16的发光最强, 672 nm处的红光强度是x=0的近130倍。上转换发光强度与泵浦功率关系的分析表明: 535、554 nm处的绿光和672 nm处的红光发光均是双光子发光过程。

null

关键词: 上转换发光, 无容器技术, 钛酸盐玻璃, Er3+/Yb3+共掺杂

Abstract:

Sphere transparent titanate glasses (La_0.94-_xEr_0.06Yb_x)(Ti_0.95Zr_0.05)_2.25O₆(x=0-0.24, in steps of 0.04) were prepared by containerless processing. The DTA curve shows that the glass(x=0) has high glass transition temperature(T_g=818℃) and onset temperature of crystallization(T_o=906℃). The thermal stability and the glass forming ability decrease with the Yb³⁺ concentration increasing. Strong absorption bands at 975 nm are observed, showing effective absorption of Yb³⁺at 975 nm. The transmittance is almost 70% in 300-3000 nm except characteristic absorption of Er³⁺and Yb³⁺. Three emission bands centered at 535, 554, 672 nm are obtained at the excitation of 980 nm laser. When the Yb³⁺ concentration x is 0.16, the glass sample performs the strongest upconversion luminescence, which emission intensity at 672 nm is almost 130 times as high as that of Er³⁺-doped glass at room temperature.

Key words: upconversion luminescence, containerless processing, titanate glass, Er3+/Yb3+ co-doped glass

中图分类号:

TQ174

朱美娟, 余建定, 张明辉, 谷彦静, 李勤, 方必军, 赵洪阳, 沈清. 无容器制备Er³⁺/Yb³⁺共掺La₂O₃-TiO₂-ZrO₂玻璃及其上转换发光研究[J]. 无机材料学报, 2015, 30(4): 391-396.

ZHU Mei-Juan, YU Jian-Ding, ZHANG Ming-Hui, GU Yan-Jing, LI Qin, FANG Bi-Jun, ZHAO Hong-Yang, SHEN Qing. Upconversion Luminescence of Er³⁺/Yb³⁺ Co-doped La₂O₃-TiO₂-ZrO₂Glasses Prepared by Containerless Processing[J]. Journal of Inorganic Materials, 2015, 30(4): 391-396.

图/表 9

图1 LTZ:Er3+/Yb3+玻璃的无容器制备

Fig. 1 Containerless processing of LTZ:Er3+/Yb3+ glasses

图2 1#玻璃的DTA曲线

Fig. 2 DTA curve of 1# glass

图3 LTZ:Er3+/Yb3+玻璃的热稳定性参数与Yb3+浓度的关系

Fig. 3 Dependence of thermal stability parameters of LTZ:Er3+/Yb3+ glasses on Yb3+ concentration

图4 不同Yb3+浓度的LTZ:Er3+/Yb3+玻璃的吸收光谱

Fig. 4 Absorption spectra of LTZ:Er3+/Yb3+ glasses with different concentrations of Yb3+

图5 不同Yb3+浓度的LTZ:Er3+/Yb3+玻璃的透过光谱

Fig. 5 Transmission spectra of LTZ:Er3+/Yb3+ glasses with different concentrations of Yb3+

图6 不同Yb3+浓度的LTZ:Er3+/Yb3+玻璃的上转换光谱

Fig. 6 Upconversion emission spectra of LTZ:Er3+/Yb3+ glasses with different concentrations of Yb3+

图7 535, 554 nm绿光和672 nm红光强度与Yb3+浓度的关系

Fig. 7 Dependence of luminescence intensities of LTZ:Er3+/ Yb3+ glasses at 535, 554 and 672 nm on Yb3+ concentration

图8 535、554 nm绿光和672 nm红光强度与泵浦功率的关系

Fig. 8 Dependence of luminescence intensities of LTZ:Er3+/ Yb3+ glasses at 535, 554 and 672 nm on pump power

图9 LTZ:Er3+/Yb3+玻璃的上转换发光机理简图

Fig. 9 Schematic illustration of the upconversion luminescence of LTZ:Er3+/Yb3+ glasses

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无容器制备Er³⁺/Yb³⁺共掺La₂O₃-TiO₂-ZrO₂玻璃及其上转换发光研究

Upconversion Luminescence of Er³⁺/Yb³⁺ Co-doped La₂O₃-TiO₂-ZrO₂Glasses Prepared by Containerless Processing

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