Abstract
In this work, Ba3Lu2Zn5O11:Yb3+,Er3+ phosphors were successfully elaborated. The structures, morphology features and up-conversion characteristics were fully investigated through X-ray powder diffraction patterns, scanning electron microscopy and photoluminescence spectra, respectively. The optimal green emission sample Ba3Lu2Zn5O11:0.4Yb3+,0.02Er3+ was determined through up-conversion spectra excited by 980 nm. Based on power-dependent spectra and energy level schematics of Er3+ and Yb3+, the up-conversion luminescence behaviors and corresponding up-conversion mechanisms were interpreted in detail. Ba3Lu2Zn5O11:Yb3+,Er3+ phosphors show excellent temperature sensing performances based on fluorescence intensity ratio technique. The maximal relative sensitivity is 1.18 %K−1@303 K and the minimal temperature resolution is 0.26 K@303 K. More importantly, calculated temperature sensing repeatability at 333 K and 573 K is higher than 98%. All results suggest the great promise of Ba3Lu2Zn5O11:Yb3+,Er3+ phosphors as future precise thermometers.
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