A self-referenced fluorescence intensity ratio optical temperature sensing materials K3YSi2O7:Bi3+/Sm3+based on multi-strategy combination

Optical temperature sensing based on fluorescence intensity ratio (FIR) technology has become a potential temperature measurement method due to its fast response, non-invasive and high accuracy. In order to improve the efficiency of development, a multi-strategy combination method was used to study the multi-mode temperature sensing performance of optical temperature sensing materials. Bi3+ doped, Sm3+ doped materials and K3YSi2O7:Bi3+,Sm3+ materials have been successfully prepared and multi-mode temperature sensing models have been established. According to FIR sources, the strategies used are classified according to Bi3+ occupying two sites, energy level thermal coupling of Sm3+ and Bi3+-Sm3+ dual center. The relative sensitivity of the material is up to 0.705% K−1, which adds a new member to the high-performance optical temperature sensing materials family. More importantly, the multi-strategy combination method based on one system opens up an effective way for the rapid development of inorganic optical temperature sensing materials.