Up-conversion luminescence and highly sensing characteristics of Er3+/Yb3+ co-doped borophosphate glass-ceramics
Up-conversion luminescence and highly sensing characteristics of Er3+/Yb3+ co-doped borophosphate glass-ceramics
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DOI：
10.1016/j.optcom.2019.02.034
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发表时间：
2019-06
影响因子：
2.4
通讯作者：
F. Shang;Yong Chen;Jiwen Xu;Tao Yang;Yun Yang;Guohua Chen
中科院分区：
文献类型：
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作者：
F. Shang;Yong Chen;Jiwen Xu;Tao Yang;Yun Yang;Guohua Chen
摘要采用传统的熔融淬冷工艺和热处理工艺，成功地制备了具有立方KAlSi 2 O 6结构的Er 3+/Yb 3+共掺磷酸盐玻璃陶瓷（GC）。用X射线粉末衍射仪（XRD）和透射电子显微镜（TEM）对GC的结构进行了表征。通过吸收光谱、光致发光谱、泵浦功率依赖的上转换发射光谱和上转换衰减曲线，系统地研究了上转换的光学性质。利用能级图分析了可能的能量传递过程和跃迁通道。结果表明，与前驱体玻璃（PG）相比，GC的UC发光性能得到增强。在980 nm激光激发下，在298- 798 K温度范围内测量了GC的变温UC发射光谱。结合荧光强度比（FIR）技术，在298- 798 K范围内，研究了Er 3+/Yb 3+共掺气相色谱（GC）中525 nm（Er 3+：2 H11 scin 2→ 4 I15 scin 2）和549 nm（Er 3+：4S 3scin 2→ 4 I15 scin 2）两个热耦合能级的UC发射随温度的变化.优化后的Er 3+/Yb 3+共掺磷酸盐气相色谱在298 K时的相对灵敏度Sr-max的理论最大值为1.67%K-1，在570 K时的绝对灵敏度Sa-max的理论最大值为4.59× 10 - 3 K-1，表明Er 3+/Yb 3+共掺磷酸盐气相色谱是一种很有前途的高灵敏度光学温度传感器。
Abstract Er 3+/Yb 3+ co-doped phosphate glass ceramics (GC) with a cubic KAlSi 2 O 6 type structure were successfully fabricated by traditional melt-quenching technique and subsequent heat treatment. Structural characterization of the GC was achieved by X-ray powder diffractometer (XRD) combined with transmission electron microscope (TEM). The up-conversion (UC) optical properties were systemically investigated through absorption spectra, photoluminescence spectra, pump power dependent UC emission spectra, and UC decay curves. The possible energy transfer process and the transition channels were analyzed by using energy level diagram. Results show that the UC luminescence performance of the GC was enhanced compared to precursor glass (PG). Moreover, the temperature dependent UC emission spectra of the GC were measured in the temperature range of 298–798K under 980 nm laser excitation. Combined with the fluorescence intensity ratio (FIR) technique, the UC emissions of Er 3+/Yb 3+ co-doped GC with two thermally coupled energy levels (TCELs) of 525 nm (Er 3+: 2 H 11∕ 2→ 4 I 15∕ 2) and 549 nm (Er 3+: 4 S 3∕ 2→ 4 I 15∕ 2) were studied as a function of temperature in the range of 298–798K. For optimized Er 3+/Yb 3+ co-doped GC, the theoretical maximum value of relative sensitivity S r− m a x is 1.67% K− 1 at 298 K, and absolute sensitivity S a− m a x is 4.59× 10− 3 K− 1 at 570 K, which indicates that the Er 3+/Yb 3+ co-doped phosphate GC is a very promising candidate for optical temperature sensors with higher sensitivity.