TY - JOUR
T1 - Near-infrared emitting Nd3+-Yb3+ codoped Y2O3 nanocrystals for highly sensitive optical thermometry
AU - Shang, Fengkai
AU - Hu, Chunhai
AU - Xu, Wei
AU - Zhu, Xin
AU - Zhao, Di
AU - Zhang, Wenbin
AU - Zhang, Zhiguo
AU - Cao, Wenwu
N1 - Funding Information:
This work was supported by the National Natural Science Foundation of China (61505174).
Publisher Copyright:
© 2020 Elsevier B.V.
PY - 2021/3/25
Y1 - 2021/3/25
N2 - Rare earth ions activated nanomaterials have been extensively considered as promising candidates for optical thermometry due to their unique photoluminescence characteristics. Nevertheless, thermally coupled levels-based thermometers are suffering from low sensitivity because of the restriction of small energy gap. Herein, the phonon-assisted energy transfer from Yb3+ to Nd3+ in Y2O3 nanoparticles, which makes the near infrared emissions of Nd3+ and Yb3+ ions respond to temperature inversely, is utilized to achieve sensitive temperature measurement via the ratiometric method. When pumped by 980 nm continuous wave laser, the multizone thermometry is performed owing to the different dependence of energy transfer on the temperature. The maximum relative sensitivities achieved in the temperature ranges of 423–773 K and 303–333 K are both approximately 2.3% K−1, which are superior to most previously reported luminescence-based temperature sensors. In addition, it is found that the measurement sensitivity is significantly influenced by the laser-induced heating effect especially at relatively low temperatures. Under the excitation of 980 nm square wave laser, the relative sensitivity is enhanced from 2.3% to 2.9% K−1 in the physiological temperature region. These findings can provide an effective pathway to improving the thermometric behavior and expanding the application of luminescence temperature sensing in various fields.
AB - Rare earth ions activated nanomaterials have been extensively considered as promising candidates for optical thermometry due to their unique photoluminescence characteristics. Nevertheless, thermally coupled levels-based thermometers are suffering from low sensitivity because of the restriction of small energy gap. Herein, the phonon-assisted energy transfer from Yb3+ to Nd3+ in Y2O3 nanoparticles, which makes the near infrared emissions of Nd3+ and Yb3+ ions respond to temperature inversely, is utilized to achieve sensitive temperature measurement via the ratiometric method. When pumped by 980 nm continuous wave laser, the multizone thermometry is performed owing to the different dependence of energy transfer on the temperature. The maximum relative sensitivities achieved in the temperature ranges of 423–773 K and 303–333 K are both approximately 2.3% K−1, which are superior to most previously reported luminescence-based temperature sensors. In addition, it is found that the measurement sensitivity is significantly influenced by the laser-induced heating effect especially at relatively low temperatures. Under the excitation of 980 nm square wave laser, the relative sensitivity is enhanced from 2.3% to 2.9% K−1 in the physiological temperature region. These findings can provide an effective pathway to improving the thermometric behavior and expanding the application of luminescence temperature sensing in various fields.
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U2 - 10.1016/j.jallcom.2020.157637
DO - 10.1016/j.jallcom.2020.157637
M3 - Article
AN - SCOPUS:85095840888
SN - 0925-8388
VL - 858
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 157637
ER -