Characterization of the phosphor (Sr,Ca)SiAlN3: Eu2+ for temperature sensing
Characterization of the phosphor (Sr,Ca)SiAlN3: Eu2+ for temperature sensing
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DOI：
10.1016/j.jlumin.2020.117487
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发表时间：
2020-06
影响因子：
3.6
通讯作者：
Ellen Hertle;Jonas Bollmann;S. Aßmann;Violetta Kalancha;A. Osvet;M. Batentschuk;S. Will;L. Zigan
中科院分区：
文献类型：
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作者：
Ellen Hertle;Jonas Bollmann;S. Aßmann;Violetta Kalancha;A. Osvet;M. Batentschuk;S. Will;L. Zigan
基于发光颗粒的激光感生磷光是一种适用于遥感温度的技术。研究了（Sr，Ca）SiAlN3：Eu 2+（“SCASN”）磷光体的发光特性，探讨了该材料对磷光体测温的适用性。该荧光粉具有很高的量子效率，很宽的激发带，发射峰位于620 nm附近，寿命短，小于1 μ s，这使得它在测温测量中具有很好的应用前景。在532 nm处激发后，发光发射显示出随温度升高而蓝移，这可以用于基于双色强度比方法的温度校准。其激发和发射特性有利于在含有燃料和油的环境中进行测量，这些燃料和油在紫外激发后倾向于荧光。该磷光体允许测量高达800 K，淬火温度为530 K。散装粉末和表面涂层的光谱特性。对于前者，观察到发射峰位置的显著偏移，这很可能是由于明显的再吸收。激发激光能量密度的变化轻微影响了散装材料和涂层的发光发射光谱，因此需要在温度测定中考虑。
Laser-induced phosphorescence based on luminescent particles is a suitable technique for remote temperature sensing. The luminescence characteristics of the phosphor (Sr, Ca) SiAlN 3: Eu 2+(” SCASN”) were investigated regarding the suitability of the material for phosphor thermometry. The phosphor has a high quantum efficiency, a very broad excitation band, an emission peak centered at about 620 nm and a short lifetime of less than 1 μ s, which makes it promising for thermometry measurements. After excitation at 532 nm, the luminescence emission reveals a blue shift with increasing temperature, which can be used for temperature calibration based on the two-color intensity ratio method. The excitation and emission characteristics are favorable for measurements in environments containing fuels and oils, which tend to fluorescence after UV-excitation. The phosphor allows for measurements up to 800 K, with a quenching temperature of 530 K. Spectral characteristics are presented for both bulk powder and a surface coating. For the former, a significant shift in the position of the emission peak is observed, which is most probably due to distinct re-absorption. A change in excitation laser fluence slightly affected the luminescence emission spectrum of both bulk material and coating and thus requires consideration in temperature determination.