Multimode luminescence thermometry based on emission and excitation spectra

Luminescence thermometers are widely known to provide contactless and noninvasive temperature sensing when traditional thermometers are useless. Their operation principle is based on the monitoring of the chosen temperature dependent luminescence parameter. The vast majority of known luminescence thermometers use one parameter to define temperature, while multimode sensors, which could broaden the working range and improve thermometric characteristics, are still rare. We report on YVO4:Er3+ 0.1 at.% sample as a thermal sensor in 299–466 K range with multiple sensing techniques utilized luminescence intensity ratio, spectral line position and bandwidth. These temperature dependent parameters were obtained from both emission and excitation spectra. The relative thermal sensitivity was varied from 0.34 to 2.61% K−1 at room temperature depending on the chosen luminescence parameter. All studied sensing methods provide sub-degree temperature resolution.