Gd2O3：Bi纳米粉中Er3 +离子发光和光致发光的温度依赖性
Temperature dependence of Er3+ ionoluminescence and photoluminescence in Gd2O3:Bi nanopowder
摘要：
研究了Bi ~（3+）离子激活的Gd_2O_3纳米粉体基质中三价铒离子（Er ~（3+））的离子发光（IL）和光致发光（PL），以确定样品材料的发光光谱变化与温度之间的联系。IL测量已经用H2+ 100 keV离子束轰击靶材料几秒钟进行，而PL光谱已经在20至700°C的温度范围内收集。PL数据用作确定与IL光谱对应的温度的参考。收集的数据使得能够基于玻尔兹曼分布定义经验公式，这使得温度能够以9.7 x 10-3 °C-1的最大灵敏度确定。从系统趋于热平衡的角度分析了Er ~（3+）的能级结构，解释了谱线强度的不同表现。这项工作导致的结论是，在离子激发过程中的温度变化可以很容易地定义与单独收集的PL光谱。最后的结果，这是经验公式描述的荧光强度比对温度的依赖性，提出了一个想法的方法在温度控制中的应用，如离子注入和一些核应用的过程中。
英文摘要：
Ionoluminescence (IL) and photoluminescence (PL) of trivalent erbium ions (Er3+) in Gd2O3 nanopowder host activated with Bi3+ ions has been studied in order to establish the link between changes in luminescent spectra and temperature of the sample material. IL measurements have been performed with H2+ 100 keV ion beam bombarding the target material for a few seconds, while PL spectra have been collected for temperatures ranging from 20 to 700°C. The PL data was used as a reference in determining the temperature corresponding to IL spectra. The collected data enabled the definition of empirical formula based on the Boltzmann distribution, which allows the temperature to be determined with a maximum sensitivity of 9.7 x 10-3 °C-1. The analysis of the Er3+ energy level structure in terms of tendency of the system to stay in thermal equilibrium, explained different behaviors of the lines intensities. This work led to the conclusion that temperature changes during ion excitation can be easily defined with separately collected PL spectra. The final result, which is empirical formula describing dependence of fluorescence intensity ratio on temperature, raises the idea of an application of method in temperature control, during processes like ion implantation and some nuclear applications.
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