Abstract
For noncontact temperature sensing, the fluorescence intensity ratio (FIR) technique based on thermally coupled levels has great prospects. Within this technique, Yb3+/Er3+ codoped upconversion (UC) particles are regarded as efficient material. Juanqin Xue and co-workers (article number 2200471) have prepared Yb3+/Er3+ codoped Gd2(WO4)3 particles by a facile coprecipitation method and subsequent calcination. The crystal structure, microstructure, and UC emission of the particles are studied in detail, and the optimum temperature sensing performance is systematically measured. Excellent temperature-sensitive properties of Gd2(WO4)3:Yb3+/Er3+ demonstrate great potential for its application in noncontact optical temperature sensors.
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