Optical Thermometry Based on Up-Conversion Luminescence Behavior of Er3+ -Doped Transparent Sr2YbF7 Glass-Ceramics
Optical Thermometry Based on Up-Conversion Luminescence Behavior of Er3+ -Doped Transparent Sr2YbF7 Glass-Ceramics
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DOI：
10.1111/jace.13804
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发表时间：
2015-12-01
影响因子：
3.9
通讯作者：
Guo, Hai
中科院分区：
文献类型：
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作者：
Li, XiaoMan;Cao, JiangKun;Guo, Hai
采用熔融淬冷法成功制备了含Sr 2 YbF 7：Er 3+纳米晶的新型透明微晶玻璃。利用XRD、HRTEM和一系列光谱学方法对它们的结构和上转换发光性能进行了系统的研究。温度依赖的上转换光谱证明Er ~（3+）的H ~（2+）（11/2）和S ~（4+）（3/2）能级是热耦合能级（TCEL）。因此，Sr 2 YbF 7：Er 3+微晶玻璃中Er 3+的H-2（11/2）-> I-4（15/2）和S-4（3/2）-> I-4（15/2）发射可用作基于荧光强度比（FIR）技术的光学测温。Er 3+离子在Sr 2 YbF 7微晶玻璃中具有较低的声子能量和较高的热稳定性，因此具有较宽的工作温度范围（300-500 K），TCEL的大能隙（786 cm（-1））和相对灵敏度的高理论最大值（62.14 x 10（-4）K-1 at 560 K），这表明Sr 2 YbF 7：Er 3+玻璃陶瓷可能是光学温度传感器的优异候选者。
Transparent novel glass-ceramics containing Sr2YbF7:Er3+ nanocrystals were successfully fabricated by melt-quenching technique. Their structural and up-conversion luminescent properties were systemically investigated by XRD, HRTEM, and a series of spectroscopy methods. The temperature-dependent up-conversion spectra prove that H-2(11/2) and S-4(3/2) levels of Er3+ are thermally coupled energy levels (TCEL). Consequently, the H-2(11/2) -> I-4(15/2) and S-4(3/2) -> I-4(15/2) emissions of Er3+ in Sr2YbF7:Er3+ glass-ceramics can be used as optical thermometry based on fluorescence intensity ratio (FIR) technique. Combined with low phonon energy and high thermal stability, Er3+ ions in Sr2YbF7 glass-ceramics present broad operating temperature range (300-500 K), large energy gap of TCEL (786 cm(-1)) and high theoretical maximum value of relative sensitivity (62.14 x 10(-4) K-1 at 560 K), which suggests that Sr2YbF7:Er3+ glass-ceramics may be excellent candidates for optical temperature sensors.