Journal
CRYSTENGCOMM
Volume 24, Issue 7, Pages 1407-1412Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/d1ce01523k
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Funding
- Major Foundation of Guangzhou Science and Technology [201804020005]
- Guangdong Natural Science Funds for Distinguished Young Scholars [2015A030306041]
- Guangdong Innovative and Entrepreneurial Research Teams Program [2016ZT06C412]
- National Key R&D Program of China [2020YFB0408100]
- National Natural Science Foundation of China (NSFC) [U20A20340]
- Tip-top Scientific and Technical Innovative Youth Talents of Guangdong Special Support Program [2015TQ01N060]
- Hundred Talent Program of Guangdong University of Technology [220418095]
- National Natural Science Foundation of China [52072079]
- Guangzhou Science and Technology Project [201904010131]
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LiNbO3:Yb3+/Er3+ nanocubes with an average diameter of approximately 500 nm were applied in non-invasive optical temperature sensors for the first time. With increasing annealing temperature, the nanocubes exhibited a significant enhancement in upconversion emissions, indicating their potential application in optical thermometry.
LiNbO3:Yb3+/Er3+ nanocubes with an average diameter of approximately 500 nm were applied in non-invasive optical temperature sensors for the first time. With increasing annealing temperature, a two orders of magnitude enhancement of green and red upconversion emissions arose from a combined effect of the decreased surface quenching centers and the increased concentration of Yb3+ and Er3+ ions in the interior of the crystal lattice. Based on the fluorescence intensity ratio technique, the LiNbO3:Yb3+/Er3+ nanocubes showed an excellent maximum sensitivity of approximately 0.0094 K-1 at 340 K, which signifies their potential application in optical thermometry.
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