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The importance of accurate, instantaneous and non-contact temperature measurement in inaccessible or dangerous places has led to a significant expansion of research for the development of nanophotonic temperature sensors. In this article, the temperature of natural gas liquids (NGL) is measured instantaneously and non-contactly by examining the temperature-dependent radiation intensity of core-shell lanthanide frequency upconversion nanoparticles Ba2LuF7:Yb3+, Nd3+, Er3+@Ba2LaF7. These 30 nm nano emitters emit a photon in the green region by absorbing the radiation of several 980 nm photons. Therefore, after characterizing the nanoparticles, by examining the temperature performance of the core-shell cubic phase nano materials doped with lanthanide ions, with Ba2LuF7 matrix and Er3+/Yb3+/Nd3+ doped ions as the core and Ba2LaF7 as the shell, the working function of this sensor is It was obtained that it was used to measure the temperature of natural gas liquids in the range of 15 to 30 degrees Celsius with a temperature sensitivity of K-10.0016.

Keywords: frequency upconversion nanoparticles, lanthanides, nano photonic sensors, thermometry

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