Highly sensitive temperature sensing of Na(Y1.5Na0.5)F6 glass-ceramics based on Dy3+/Pr3+ energy transfer

A novel variety of Na(Y1.5Na0.5)F-6 (NYNF) glass-ceramics (GCs), co-doped with Dy3+/Pr3+, exhibiting remarkable temperature sensitivity, has been developed using the high-temperature melt-quenching technique. The influence of rare earth ion doping on the matrix lattice was thoroughly analyzed via X-ray diffraction, while the size and distribution of nano-scale grains were examined using transmission electron microscopy. These analyses collectively confirmed the successful synthesis of the GCs. Furthermore, the optical characteristics of NYNF GCs were investigated, revealing that the optimal concentration for Pr3+ doping is 0.5 mol%. Additionally, the study delved into how varying concentrations of Pr3+ doping influence the luminescence of GCs. The doped samples demonstrated superior temperature sensitivity, achieving a maximum relative sensitivity of 1.302% K-1 and a high activation energy of 0.31 eV. These findings suggest that Dy3+/Pr3+ co-doped NYNF GCs hold promise as an exceptional optical material for applications in non-contact temperature sensors and high sensitivity electronic display.