Optical Temperature-Sensing Performance of La 2 Ce 2 O 7 :Ho 3+ Yb 3+ Powders

• Published in: Materials Vol. 17; no. 7
• Main Authors: Chao, Jiameng, Lin, Hui, Yu, Dechao, Hong, Ruijin, Han, Zhaoxia, Tao, Chunxian, Zhang, Dawei
• Format: Journal Article
• Language: English
• Published: Switzerland 07-04-2024
• Subjects: optical temperature sensing; pyrochlore structure; energy transfer; up-conversion emission
• ISSN: 1996-1944; 1996-1944

In this paper, La
Ce
O
powders co-activated by Ho
and Yb
were synthesized by a high temperature solid-state reaction. Both Ho
and Yb
substitute the La
sites in the La
Ce
O
lattice, where the Ho
concentration is 0.5 at.% and the Yb
concentration varies in the range of 10~18% at.%. Pumped by a 980 nm laser, the up-conversion (UC) green emission peak at 547 nm and the red emission at 661 nm were detected. When the doping concentration of Ho
and Yb
are 0.5 at.% and 14% at.%, respectively, the UC emission reaches the strongest intensity. The temperature-sensing performance of La
Ce
O
:Ho
with Yb
was studied in the temperature range of 303-483 K, where the highest relative sensitivity (S
) is 0.0129 K
at 483 K. The results show that the powder La
Ce
O
:Ho
, Yb
can be a potential candidate for remote temperature sensors.