Journal
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH
Volume 58, Issue 47, Pages 21242-21251Publisher
AMER CHEMICAL SOC
DOI: 10.1021/acs.iecr.9b05286
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Funding
- National Natural Science Foundation of China [51972065, 51802045]
- Special Fund for Scientific and Technological Innovation Strategy of Guangdong Province [2018A030310539]
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The use of noninvasive and rapid responsive spectroscopy coupled to potential applications under harsh conditions has led to an increased interest in all-optical ratiometric thermometers. In this work, we report on a novel all-optical ratiometric thermometer made of Ca8BaCe-(PO4)(7):Mn2+, trap-mediated red emission of Mn2+ displayed antithermal quenching in the room-temperature (RT)-573 K range for a Mn2+ content of 0.05. The blue emission of Ce3+ weakens rapidly at elevated temperature, thereby leading to an increased discriminability of fluorescence intensity and a good temperature sensitivity. The maximum fluorescence and lifetime-based relative sensitivity are , similar to 2.17% K-1 and 5.14% K-1. The insight of interplay among diverse emission centers and traps is revealed. Moreover, the color of the emissions changes between yellow and red with temperature variations when Eu2+ ions are doped into Ca8BaCe(PO4)(7):Mn2+. The highly sensitive self-calibrated optical thermometer shows great promise with safety anticounterfeiting applications.
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