Non-contact fluorescence intensity ratio optical thermometer based on Yb3+/Nd3+ codoped Bi4Ti3O12 microcrystals
Non-contact fluorescence intensity ratio optical thermometer based on Yb3+/Nd3+ codoped Bi4Ti3O12 microcrystals
复制标题
基于Yb3/Nd3共掺Bi4Ti3O12微晶的非接触式荧光强度比光学温度计
DOI：
10.1016/j.jlumin.2020.117095
复制
发表时间：
2020-05-01
影响因子：
3.6
通讯作者：
Chen, Liang
中科院分区：
文献类型：
--
作者：
Chen, Hao;Bai, Gongxun;Chen, Liang
基于两级热电偶非接触式荧光强度比技术的光学温度计在电力工业、原位生理测量等领域具有巨大的应用前景。本文采用固相烧结法制备了Yb3+/Nd3+共掺杂Bi4Ti3O12纳米晶比温度计。两个热电偶能级分别为 Nd3+:F-4(7/2)（发射峰值在 753 nm 附近）和 Nd3+:F-4(5/2)（发射峰值在 805 nm）。该光学温度计基于 980 nm 激发下的近红外发光上转换，功率低至 1.87 W/cm(2)。由于泵浦功率相对较低，因此激发热效应对材料的影响减小。这使得Yb3+/Nd3+共掺杂Bi4Ti3O12微晶在323-573 K温度范围内具有相对较高的相对灵敏度（S-R = 1% K-1）。除了上述特性外，两个Nd3+发射峰之间的荧光强度比优异的重复性（sigma = 1.5%）使得Yb3+/Nd3+共掺杂Bi4Ti3O12微晶成为一种有前途的非接触式近红外比例温度计。
Optical thermometer based on the non-contact fluorescence intensity ratio technique of two thermally-couple levels has huge potential applications in many fields, such as the electric power industry and in-situ physiological measurements. In the paper, the Yb3+/Nd3+ codoped Bi4Ti3O12 nanocrystal ratio thermometer has prepared by solid-phase sintering. The two thermally-couple levels are Nd3+:F-4(7/2) (emission peak around 753 nm) and Nd3+:F-4(5/2) (emission peak at 805 nm), respectively. The optical thermometer has based on the upconversion in near-infrared luminescence under 980 nm excitation with low power of 1.87 W/cm(2). Due to the relatively low pump power, the effect of the excitation heat effect on the material is reduced. This resulted in a relatively high relative sensitivity (S-R = 1% K-1) in the temperature range of 323-573 K. In addition to the characteristics, the excellent repeatability (sigma = 1.5%) of the fluorescence intensity ratio between the two Nd3+ emission peaks makes Yb3+/Nd3+ codoped Bi4Ti3O12 microcrystals a promising non-contact near-infrared ratio thermometer.