Fluorescence intensity ratio and lifetime thermometry of praseodymium phosphates for temperature sensing

We report on the temperature sensing properties of varied praseodymium phosphate hosts MI(Na,Li,K)Pr(PO3)4 and PrP5O14. Details about fabrication, materials, and spectroscopic characterization are presented. The fluorescence properties of the praseodymium phosphates have been systematically investigated from room temperature to 363 K under selective laser excitation in the 3P0 multiplet. The temperature sensing measurements were carried out by using fluorescence intensity ratio and fluorescence lifetime techniques. From this systematic study, the thermal resolution potentially achieved has been determined and compared to previous works.