Multilevel-cascade intensity ratio temperature read-out of Dy3+ luminescence thermometers

TL;DR: Nd3+-doped LuVO4 nanocrystalline powder exhibits superior thermometric performance as a Boltzmann-type ratiometric thermal sensor, offering reliable temperature measurements within a broad range of 20-250 K.

TL;DR: In this paper , two types of dual-center Gd2O3:Tb3+/Eu3+ nanophosphors, namely co-doping and physical mixture, were proposed for ratiometric thermometry within temperature range of 123-473 K.

TL;DR: In this article , a single host lattice Eu2+/Eu3+ co-activated luminescent material of SrAl2O4 was prepared by solid-state reaction in the ambient atmosphere and phase composition and crystal structure were determined by X-ray powder diffraction and Rietveld refinement.

TL;DR: In this paper , a novel measurement technique, called luminescence intensity ratio squared (LIR2), was developed for the Yb3+/Er3+ pair, that combines the temperature sensitivity of ground and excited-state populations.

TL;DR: In this paper, the temperature dependence of the fluorescence intensity ratio has been studied using thermally coupled energy levels in seven different rare earth ions doped into a variety of glasses and crystals.

Abstract: Present technological demands in disparate areas, such as microfluidics and nanofluidics, microelectronics and nanoelectronics, photonics and biomedicine, among others, have reached to a development such that conventional contact thermal probes are not accomplished anymore to perform accurate measurements with submicrometric spatial resolution. The development of novel noncontact thermal probes is, then, mandatory, contributing to an expansionary epoch of luminescence thermometry. Luminescence thermometry based on trivalent lanthanide ions has become very popular since 2010 due to the unique versatility, stability, and narrow emission band profiles of the ions that cover the entire electromagnetic spectrum with relatively high emission quantum yields. Here, a perspective overview on the field is given from the beginnings in the 1950s until the most recent cutting‐edge examples. The current movement toward usage of the technique as a new tool for thermal imaging, early tumor detection, and as a tool for unveiling the properties of the thermometers themselves or of their local neighborhoods is also summarized.

TL;DR: In this paper, a center of gravity was computed based on the energies of the observed states, and optimized sets of atomic energy level parameters were calculated for odd-f-electron systems.

TL;DR: The temperature-dependent characteristics of fluorescence of several rare-earth-doped ceramic phosphors has made these materials the focus of a major effort in the field of noncontact thermometry over the past few decades as mentioned in this paper.