Antithermal Quenching and Multiparametric Temperature Sensing from Mn²⁺/Tb³⁺‐Codoped Ca₂LaTaO₆ Phosphor

Luminescence thermometry plays significant roles in various fields including industrial production, environmental detection, aerospace, and medicine. However, its accuracy improvement remains highly challenging due to the thermal quenching effect of phosphors. Herein, for first time, a thermal-activated electron compensation Mn2+- Tb3+-codoped Ca2LaTaO6 phosphor is developed multiparametric temperature sensing with tunable emission Mn2+ antithermal Tb3+, leading excellent at high temperatures. By virtue deep trap states induced by dopant, electrons can be thermally activated temperatures, which replenish attenuated Tb3+ caused quenching, thus bringing out phenomenon. On account prominent properties, luminescence intensity ratio (LIR) readout lifetime-based are designed, providing maximum relative sensitivity SR 3.603% 1.941% K−1, respectively. Multiparametric novel data analysis also employed further improve thermometer. The outstanding ranging from 8.72% 16.11% K−1 uncertainty order 10−3 achieved. These results demonstrate that designed Ca2LaTaO6:Mn2+/Tb3+ material promising thermal-sensing candidate.