Customizing thermometry: Optimizing the operating temperature range of phase transition-based ratiometric luminescence thermometers

The Butterfly Effect: Multifaceted Consequences of Sensitizer Concentration Change in Phase Transition-based Luminescent Thermometer of LiYO2:Er3+,Yb3+

“…The incremental introduction of dopant ions leads to a successive reduction in the LiYO 2 unit cell, thereby lowering the phase transition temperature from 265 K, for LiYO 2 :Er 3+ , 1%Yb 3+ , to 180 K, for 10%Yb 3+ (Figure f). The mismatch in ionic radii between host material and dopant ions can be quantified by the determination of the Ω parameter: normalΩ = R 0 − n normalΔ R R 0 − 1 where R 0 represents the ionic radius of Y 3+ ions, n is the codopant ion concentration, and Δ R is the difference between R 0 and the ionic radii of the host material ions and codopant.…”

“…However, the careful analysis of the thermal dependence of LIR in a whole temperature range indicates the small hysteresis loop, which is expected for phase transition and was already reported for other materials. 14 − 16 , 30 Therefore, the developed thermometers should be used in applications where the monotonicity of the temperature change is known and does not change during the experiment.…”