Search

Thermal nonradiative depopulation processes of excited levels significantly influence the potential application of phosphors. The high efficiency of thermal quenching of luminescence can limit a phosphor's potential applications as well as reduce the temperature range in which such a material can be used. This work presents a new strategy of shifting of usable temperature range of luminescent thermometer based on Eu3+ ion emission that the molar ratio of (AsO4)3− in respect to (VO4)3− increases in YVxAs1−xO4 host material. Consequently, the thermometric performance of the luminescence thermometer based on the single band intensity ratio corresponding to the 5D0 → 7F1 of Eu3+ ions upon optical excitations matching to the 1A2(1T1) → 1B1(1T2) and 1E(1T1) → 1B1(1T2) electronic transition of (VO4)3− group can be optimized. As shown, the use of YV0.25As0.75O4:Eu3+ has an extended usable temperature range in respect to YVO4:Eu3+. This improvement, coupled with its high sensitivity (>1% K−1) make YV0.25As0.75O4:Eu3+ a more stable material for luminescence thermometer applications. The presented strategy for modulating the thermal properties of luminescent thermometers through the introduction of the (AsO4)3− groups is a step towards designing thermometers with on-demand thermometric performance. [ABSTRACT FROM AUTHOR]