Achieving non-contact optical thermometer via inherently Eu2+/Eu3+-activated SrAl2Si2O8 phosphors prepared in air
Achieving non-contact optical thermometer via inherently Eu2+/Eu3+-activated SrAl2Si2O8 phosphors prepared in air
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DOI：
10.1016/j.jallcom.2020.155858
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发表时间：
2020-11
影响因子：
6.2
通讯作者：
Junpeng Xue;Mingjun Song;H. Noh;S. Park;B. Choi;Jung Hwan Kim;J. Jeong;Peng Du
中科院分区：
文献类型：
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作者：
Junpeng Xue;Mingjun Song;H. Noh;S. Park;B. Choi;Jung Hwan Kim;J. Jeong;Peng Du
采用传统的固相反应在空气中合成了Eu2+/Eu3+活化的sral2si2o8荧光粉，该荧光粉由Eu2+离子的4f65d→4f7跃迁产生蓝色发射，由Eu3+离子的5d0→7fj跃迁产生红色发射。Eu2+和Eu3+离子的光致发光强度随掺杂量的增加而增加，当掺杂浓度为3 mol%时达到最大值。此外，基于Eu2+和Eu3+离子不同的热猝灭行为，采用荧光强度比技术研究了SrAl2Si2O8: Eu2+/Eu3+荧光粉的测温性能。在温度为583 K时，最大绝对灵敏度为0.056 K-1，最大相对灵敏度为0.30% K-1。此外，还研究了不同激发波长和掺杂浓度对测温性能的影响。另一方面，通过分析衰变时间对温度的各种响应，讨论了Eu2+和Eu3+离子在298 ~ 573 K温度范围内的测温性能。所研究的荧光粉在573 K时的最大相对灵敏度可达0.22% K−1。这些结果表明，Eu2+/Eu3+活化的sral2si2o8荧光粉在非接触式光学测温领域具有广阔的应用前景。
Eu2+/Eu3+-activated SrAl2Si2O8phosphors, which presented blue emission originating from 4f65d → 4f7transition of Eu2+ions and red emission arising from5D0→7FJtransition of Eu3+ions, were synthesized by the traditional solid-state reaction in the air. The photoluminescence intensities of Eu2+and Eu3+ions increased with increasing the dopant content and reached their maximum value when the doping concentration was 3 mol%. Moreover, based on the diverse thermal quenching behaviors of Eu2+and Eu3+ions, the thermometric performance of the SrAl2Si2O8: Eu2+/Eu3+phosphors were investigated by fluorescence intensity ratio technology. The maximum absolute sensitivity and relative sensitivities were 0.056 K-1and 0.30% K−1, respectively, at the temperature of 583 K. Also, the effects of different excitation wavelength and doping concentration on thermometric performance were studied in detail. On the other hand, through analyzing the various responses of the decay time to temperature, the thermometric performances of the Eu2+and Eu3+ions were also discussed in the temperature range of 298–573 K. The maximum relative sensitivity of the studied phosphors reached up to 0.22% K−1at 573 K. These results suggested that the Eu2+/Eu3+-activated SrAl2Si2O8phosphors had the potential in the field of non-contact optical thermometry.