Er3+ doped ferroelectric Pb(Mg1/3Nb2/3)O3–0.25PbTiO3 ceramic used as a linear response fluorescent temperature sensor

Abstract Er 3+ doped ferroelectric Pb(Mg 1/3 Nb 2/3 )O 3 –0.25PbTiO 3 (PMN–PT) ceramic was grown by using a two-stage sintering method. The sample shows relatively strong upconversion (UC) visible fluorescence under a 980 nm diode laser excitation and the fluorescence spectra were recorded in the temperature ( T ) range of 300–600 K. The fluorescence intensity ratios (FIR) of different energy levels, like 2 H 11/2 , 4 S 3/2 , 4 F 9/2 , and its stark sublevels, were studied as functions of temperature. The responses of FIR adopted here have a linear response to temperature in certain temperature range, and the resolutions achieved for temperature sensing using this material can be 0.5 K with the sensitivity as high as 2.9% K −1 .

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