Single vs. mutliparametric luminescence thermometry: the case of Eu3+-doped Ba3(VO4)2 nanophosphors

Abstract

Luminescence thermometry could provide remote temperature sensing with high spatial and temporal resolution. To date, a lot of effort has been focused on maximizing the performances of these thermal sensors. One of the promising strategies is using several temperature-sensitive parameters to provide more reliable and accurate thermal sensing. Here, we compare luminescence thermometry based on single parameter monitoring, namely LIR, spectral line position and bandwidth, and multiparametric sensing based on principal component analysis. All thermometry was performed using excitation spectra of Eu³⁺-doped Ba₃(VO₄)₂ nanocrystalline powder. The results obtained testify the advantage of multiparametric thermometry over a classical single parameter one, which can be used for further enhancement of the thermometric performances of luminescence thermometers through appropriate treatment of the collected data for calibration.