Boltzmann-type cryogenic ratiometric thermometry based on Nd³⁺-doped LuVO₄ phosphors

Abstract

Contactless optical thermometry with high sensitivity, temperature resolution, and fast response is strongly needed in various applications including scientific research, life activities, and industrial manufacturing processes. Boltzmann-type ratiometric thermometry relying...

Frontiers of Deep-Red Emission of Mn4+ Ions with Ruddlesden–Popper Perovskites

“…Therefore, the useful range of a thermometer based on the LIR parameter should be limited to the 13–200 K range. Despite achieving a relatively high value of S R = 10.37% K –1 , it should be emphasized that similar results obtained in the cryogenic temperature range have already been reported in the literature. − This is the result of thermal activation of many nonradiative processes in this temperature range in the host material. Moreover, temperature readout in the realistic application may be hampered since such a high increase of LIR value and such a high increase in LIR by as much as 3 orders of magnitude mean that the intensities of the spectral ranges under consideration are significantly different.…”