Optical thermometry based on the upconversion fluorescence from Yb3+/Er3+ codoped La2O2S phosphor
Optical thermometry based on the upconversion fluorescence from Yb3+/Er3+ codoped La2O2S phosphor
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DOI：
10.1016/j.ceramint.2014.02.081
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发表时间：
2014-08
影响因子：
5.2
通讯作者：
Yanmin Yang;Chao Mi;Fang Yu;Xian-yuan Su;Chongfeng Guo;Gang Li;Jiao Zhang;Linlin Liu;
中科院分区：
文献类型：
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作者：
Yanmin Yang;Chao Mi;Fang Yu;Xian-yuan Su;Chongfeng Guo;Gang Li;Jiao Zhang;Linlin Liu;
在300-573 K温度范围内，研究了Yb 3 +/Er 3+共掺La 2 O2 S荧光粉中524和547 nm两个绿色发射带的荧光强度比（FIR）随温度的变化规律。上转换磷光体La 2 O2 S：Yb 3+、Er 3+在低泵浦功率下显示出强烈的双带绿色发射，并且从上转换绿色发射的FIR导出的最大传感器灵敏度约为0.008 K−1。这表明该荧光粉在光学温度传感器中具有潜在的应用价值。基于Judd-Ofelt理论，首次对影响温度传感灵敏度的因素进行了解释。
The fluorescence intensity ratio (FIR) of the two green emission bands centered at 524 and 547 nm in Yb3+/Er3+co-doped La2O2S phosphor was studied as a function of temperature in the range 300–573 K for optical temperature measurement. Upconversion phosphor La2O2S: Yb3+, Er3+show intense double-band green emission at low pump power, and the maximum sensor sensitivity derived from the FIR of the upconversion green emissions was approximately 0.008 K−1. This indicates that the phosphor has potential application in optical temperature sensors. Based on the Judd–Ofelt theory, an interpretation on how the factors influence the sensitivity of temperature sensing was proposed for the first time.