Abstract
As significantly growing demand for noncontact temperature sensors, the exploitation of superior optical thermometers is increasingly urgency. Herein, novel Ba3Yb4O9:Er3+ phosphors were successfully synthesized and the strategy of appropriate cations substitution (Mg2+, Ca2+, Sr2+) was designed to strengthen the up-conversion luminescence as well as thermometric performance of Ba3Yb4O9:Er3+. Among them, Ba3-yYb4-xO9:xEr3+,yMg2+ is identified to be an excellent optical thermometric material. Based on the fluorescent intensity ratio from thermal coupled energy levels (2H11/2/4S3/2) of Er3+, the relative (SR) and absolute (SA) sensitivities of Ba2.9Yb3.6O9:0.4Er3+,0.1Mg2+ can reach as high as 1.29% K−1 at 302 K and 0.43% K−1 at 573 K, respectively, which are higher than that of Mg2+-free doped Ba3Yb3.6O9:0.4Er3+ (SR:1.15% K−1 at 302 K; SA:0.38% K−1 at 523 K). In addition, the sample exhibits outstanding reversibility and reproducibility. These results imply that Ba3-yYb4-xO9:xEr3+,yM2+ is a promising candidate applied in temperature sensing fields.
Sign-in/Register to access full text options 
Free) 
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 call
