Highly stable lead-free perovskite glass for real-time 3D surface temperature measurement across the wide temperature range

3D Optical temperature sensors are highly valuable in various fields such as industry, medicine, and aerospace, as they allow for real-time detection of temperature distribution on surfaces. However, existing temperature sensor materials face challenges in achieving accurate detection across a wide range of temperatures from low to high. To overcome these issues, Cs2Zn1-xEuxBr4 2 Zn 1-x Eu x Br 4 perovskite B2O3-BaF2-Ga2O3 2 O 3 - BaF 2-Ga 2 O 3 (BBG) borate glass was prepared for non-contact 3D optical temperature sensing. Cs2Zn1-xEuxBr4 2 Zn 1-x Eu x Br 4 perovskite B2O3-BaF2-Ga2O3 2 O 3 - BaF 2-Ga 2 O 3 (BBG) borate glass improves the stability, thus expanding the temperature measurement range. Utilizing the fluorescence intensity ratio (FIR) method, based on the 613 nm (Eu3+: 3+ : 5D0 -> 7F2) D 0 -> 7 F 2 ) and 592 nm (Eu3+: 3+ : 5D0 -> 7F1) D 0 -> 7 F 1 ) emission bands, a FIR benchmark database was constructed for the entire temperature range from 10 K to 640 K. Temperature calculation equations related to FIR were derived, with a maximal relative sensitivity of 0.08 % K-1 at 180 K. The method for measuring the surface temperature of 3D curved aircraft is based on the rare earth perovskite borate glass. The temperature measured with this method is close to the thermal imaging temperature and has a good temperature measuring effect. The temperature measurement range is wider and more advantageous than previously reported ranges. These results indicate that Cs2Zn1-xEuxBr4-BBG 2 Zn 1-x Eu x Br 4-BBG perovskite borate glass temperature sensors have broad application prospects in many applications.