2 research outputs found
Thermally enhanced photoluminescence and temperature sensing properties of ScWO:Eu phosphors
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 Eu ions into negative expansion material
ScWO:Eu, 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 ScWO: 6 mol% Eu 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
Eu ions demonstrate a maximum relative temperature sensitivity of 3.063%
K-1 at 298 K for ScWO:Eu: 6 mol% Eu phosphors. The
sensitivity of sample decreases with the increase of Eu concentration.
Benefiting from the thermal enhanced luminescence performance and good
temperature sensing properties, the ScWO:Eu: Eu
phosphors can be applies as optical thermometers