Abstract
The mono-dispersed hexagon microcrystal of KLuF4:24%Yb3+/0.5%Tm3+ with an average particle size of 5 μm has been synthesized by a facile hydrothermal method. Based on the fluorescence intensity ratio (FIR) technique, the dependence of the up-conversion (UC) emission intensity of a single KLuF4:24%Yb3+/0.5%Tm3+ particle on the ambient temperature ranging from 303 to 503 K has been studied in detail. The sensitivity of the 1G4(a)/1G4(b) and 3F2,3/3H4 thermally coupled levels (TCLs) is calculated, and the maximum sensitivity of which is 2.101 × 10−3 K−1 at 303 K and 1.451 × 10−4 K−1 at 503 K, respectively. Furthermore, the temperature of KLuF4:24%Yb3+/0.5%Tm3+ single-particle rise from 347 to 366 K when the pump power increases from 168 to 1145 mW. It proves the heating effect of 3F2,3/3H4 TCLs is induced by 980 nm laser excitation. Compared with 1G4(a)/1G4(b) TCLs, the sensitivity of 3F2,3/3H4 TCLs exhibits better accuracy at high temperature. Moreover, the excellent thermal stability of the KLuF4:24%Yb3+/0.5%Tm3+ microcrystal for temperature detection in the range of 303–503 K is proved. The Yb3+/Tm3+ co-doped KLuF4 single-particle shows promising applications in the fields of compact optical thermometers and optical heaters.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
