Widening the Temperature Range of Luminescent Thermometers through the Intra‐ and Interconfigurational Transitions of Pr³⁺

Abstract In this study, it is shown how the temperature range of luminescent thermometers can be widened in an unprecedented way by combining the intra‐ and interconfigurational transitions of the Pr³⁺ ion in a single material. Using Sr₂GeO₄:Pr³⁺ crystalline powders as an illustrative example, the implementation of luminescence thermometry is reported in the broadest temperature range up to now (17–600 K) with a remarkable performance: maximum relative sensitivity values of 9.0% · K⁻¹ (at 22 K, cryogenic range), 0.6% · K⁻¹ (at 300 K, physiological range), and 0.5% · K⁻¹ (at 600 K, high‐temperature range) and minimum temperature uncertainty of 0.1 K.