An up-conversion Ba₃In(PO₄)₃:Er³⁺/Yb³⁺ phosphor that enables multi-mode temperature measurements and wide-gamut ‘temperature mapping’

Abstract

At present, most fluorescent materials for optical temperature measurement face the problem of poor thermochromic performance, which limits their applications. In this study, a phosphor Ba3In(PO4)3: Er/Yb with a high...

Eulytite-type Ba3Yb(PO4)3:Tm/Er/Ho as a high sensitivity optical thermometer over a broad temperature range

“…This greatly improves the UC luminescence efficiency and simplifies the concentration design between active ions and sensitizing ions, providing an excellent host crystal for the development of optical thermometers. 39 However, to the best of our knowledge, Ba 3 Yb(PO 4 ) 3 has not been reported as an UC substrate.…”

Achieving high-sensitivity dual-mode optical thermometry via phonon-assisted cross-relaxation in a double-perovskite structured up-conversion phosphor

“…For UC luminescent materials used in optical thermometry, high-quality matrix crystals are one of the key elements to achieve accurate and efficient optical thermometers. 14–18 Fluoride matrix crystals (such as NaYF 4 , SrF 2 , LuF 3 , etc .) normally exhibit efficient UC luminescence due to their low phonon energy.…”