“…Among the reported examples of mixed Nd III and Yb III emission thermometers, this set of compounds demonstrates the highest sensitivity to the best of our knowledge (Table S7). , Further, to estimate the precision in determining the temperature, we evaluate the temperature uncertainty parameters, δ T = (δ Δ / Δ )/ S r , where δ Δ / Δ is the relative error in the determination of the thermometric parameter (Figures c,f,i, S12d, S13d, and Table S6). In a higher temperature range (100–300 K), δ T for all systems is substantially below 1 K, however, below 100 K, δ T values rise abruptly and approach 1 K. Among all five compounds, 3 seems to be the most optimal system with a large temperature operating range, high sensitivity, and proper coefficients of determination for the fitted values.…”