荧光粉
发光
兴奋剂
带隙
荧光
材料科学
分析化学(期刊)
发射光谱
化学
光电子学
光学
谱线
物理
天文
色谱法
作者
Jie Li,Jie Fu,Jianhua Lin,Yanling Chen,Yinuo Wen,Mingxiao Han,Shuyang Chen,Degang Deng
摘要
Abstract An optical thermometry strategy based on Mn 2+ ‐doped dual‐wavelength emission phosphor has been reported. Samples with different doping content were synthesized through a high‐temperature solid‐phase method under an air atmosphere. The electronic structure of Li 4 Zn(PO 4 ) 2 was calculated using density functional theory, revealing it to be a direct band gap material with an energy gap of 4.708 eV. Moreover, the emitting bands of Mn 2+ at 530 and 640 nm can be simultaneously observed when using 417 nm as the exciting wavelength. This is due to the occupation of Mn 2+ at the Zn 2+ site and the interstitial site. Further analysis was conducted on the temperature‐dependent emission characteristics of the sample in the range 293–483 K. Mn 2+ has different responses to temperature at different doping sites in Li 4 Zn(PO 4 ) 2 . Based on the calculations using the fluorescence intensity ratio technique, the maximum relative sensitivity at a temperature of 483 K was determined to be 1.69% K −1 , while the absolute sensitivity was found to be 0.12% K −1 . The results showed that the Li 4 Zn(PO 4 ) 2 :Mn 2+ phosphor has potential application in optical thermometry.
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