Journal
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
Volume 21, Issue 44, Pages 24308-24315Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9cp04094c
Keywords
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Funding
- National Natural Science Foundation of China (NSFC) [81571720, 61505045]
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A guideline for designing sensitive thermometry is proposed. It reveals that using two emission bands that possess the opposite change tendencies against temperature makes it easier to achieve a larger relative sensitivity. Based on the guidelines, a highly sensitive strategy for optical thermal detection that depends on the Tb3+-to-Eu3+ emission ratio is designed by exciting Eu3+/Tb3+'s unusual absorption lines. This can be easily driven by a commonly used and cheap 405 nm laser diode. Moreover, its maximum relative sensitivity reaches up to 2.02% K-1 at 610 K, one of the largest sensitivities reported so far.
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