Currently,lanthanide ions doped luminescence materials applying as optical
thermometers have arose much concern. Basing on the different responses of two
emissions to temperature, the fluorescence intensity ratio (FIR) technique can
be executed and further estimate the sensitivities to assess the optical
thermometry performances. In this study, we introduce different doping
concentrations of Eu3+ ions into negative expansion material
Sc2βW3βO12β:Eu3+, accessing to the thermal enhanced luminescence
from 373 to 548 K, and investigate the temperature sensing properties in
detail. All samples exhibit good thermally enhanced luminescence behavior. The
emission intensity of Sc2βW3βO12β: 6 mol% Eu3+ phosphors reaches
at 147.81% of initial intensity at 473 K. As the Eu doping concentration
increases, the resistance of the samples to thermal quenching decreases. The
FIR technique based on the transitions 5D0-7F1 (592 nm) and 5D0-7F2 (613 nm) of
Eu3+ ions demonstrate a maximum relative temperature sensitivity of 3.063%
K-1 at 298 K for Sc2βW3βO12β:Eu3+: 6 mol% Eu3+ phosphors. The
sensitivity of sample decreases with the increase of Eu3+ concentration.
Benefiting from the thermal enhanced luminescence performance and good
temperature sensing properties, the Sc2βW3βO12β:Eu3+: Eu3+
phosphors can be applies as optical thermometers