Li Li, Li Xinji, Wu Zhaojie, Hua Yongbin, Zhou Xianju, Wang Yongjie, Cao Zhongmin, Jiang Sha, Xiang Guotao, Yu Jae Su
School of Science, Chongqing University of Posts and Telecommunications, Chongqing, 400065, P. R. China.
School of Optoelectronic Engineering, Chongqing University of Posts and Telecommunications, Chongqing 400065, PR China.
Dalton Trans. 2023 Nov 7;52(43):15798-15806. doi: 10.1039/d3dt01525d.
Color tunable phosphors of Mn and Tb co-doped double-perovskite SrGdLiTeO (SGLT) were synthesized in this work. The crystal parameters and photoluminescence performances were investigated in detail. By taking advantage of the different thermal quenching strengths between Mn and Tb ions, the emission color of SGLT:0.7%Mn/1%Tb changed from red to green, which could be used for high-temperature temperature warning indication. Moreover, according to the luminescence intensity ratio (LIR) technique, wide temperature-range optical thermometry was developed and further, the maximum relative sensitivity () value of the SGLT:0.7%Mn/5%Tb phosphor was determined to be 1.49% K at 560 K. On the other hand, the sensing properties were also analyzed based on the temperature-dependent lifetime method. The most interesting thing is that the maximum value reached 1.88% K at 573 K. This work proved that the Mn and Tb co-doped double-perovskite SrGdLiTeO could be potentially used in temperature warning indication and high sensitivity luminescence thermometry.
本工作合成了Mn和Tb共掺杂的双钙钛矿SrGdLiTeO（SGLT）的颜色可调磷光体。详细研究了其晶体参数和光致发光性能。利用Mn和Tb离子之间不同的热猝灭强度，SGLT:0.7%Mn/1%Tb的发射颜色从红色变为绿色，可用于高温温度预警指示。此外，根据发光强度比（LIR）技术，开发了宽温度范围的光学测温方法，进一步确定SGLT:0.7%Mn/5%Tb磷光体在560 K时的最大相对灵敏度（）值为1.49% K。另一方面，还基于温度相关寿命方法分析了传感特性。最有趣的是，在573 K时最大值达到1.88% K。这项工作证明，Mn和Tb共掺杂的双钙钛矿SrGdLiTeO可潜在地用于温度预警指示和高灵敏度发光测温。
