Journal
ACS APPLIED MATERIALS & INTERFACES
Volume 14, Issue 1, Pages 1757-1764Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acsami.1c20937
Keywords
optical thermometry; NIR luminescence; luminescence intensity ratio; phonon-assisted energy transfer; thermal sensitivity; codoping
Funding
- Russian Science Foundation [21-79-10018]
- Research Centre for X-ray Diffraction Studies (St. Petersburg State University)
- Russian Science Foundation [21-79-10018] Funding Source: Russian Science Foundation
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This study successfully applied LuVO4:Nd3+/Yb3+ nanophosphors for temperature measurements and investigated the effects of different dispersion systems and Yb3+ doping concentrations on the thermometric performance.
Accurate contactless thermometry is required in many rapidly developing modern applications such as biomedicine, micro- and nanoelectronics, and integrated optics. Ratiometric luminescence thermal sensing attracts a lot of attention due to its robustness toward systematic errors. Herein, a phonon-assisted upconversion in LuVO4:Nd3+/Yb3+ nanophosphors was successfully applied for temperature measurements within the 323-873 K range via the luminescence intensity ratio technique. Dual-activating samples were obtained by codoping and mixing single-doped nanopowders. The effect of the type of dispersion system and the Yb3+ doping concentration was studied in terms of thermometric performances. The relative thermal sensitivity reached a value of 2.6% K-1, while the best temperature resolution was 0.2 K. The presented findings show the way to enhance the thermometric characteristics of contactless optical sensors.
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