Cr 3+ -doped double-perovskites for near-infrared luminescent ratiometric thermometry
Physica B: Condensed Matter, ISSN: 0921-4526, Vol: 625, Page: 413496
2022
- 18Citations
- 5Captures
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Article Description
The accurate measurement of temperature is of great importance in many fields ranging from industrial manufacture to our daily life, which can be finely implemented via the fluorescent intensity ratio (FIR) thermometry on the basis of Boltzmann distribution. Especially, the near-infrared (NIR)-emitting levels 4 T 2 / 2 E of Cr 3+ ion have recently emerged as the promising thermally coupled levels (TCLs), taking advantage of their superior optical property with high tunability. Herein, the crystal field strength around Cr 3+ ions in double-perovskite La 2 MgHfO 6 have been elaborately modulated via varying the dopant concentration, which greatly affect the intensity ratio between the spin-forbidden 2 E → 4 A 2 and spin-allowed 4 T 2 → 4 A 2 transitions. Thermal sensing behaviors based on the TCLs ( 4 T 2 / 2 E) were evaluated and the relative sensitivity gradually grew with the increase of crystal field strength. Above results offer guiding insights into the sensitivity optimization of Cr 3+ -based FIR thermometers, while providing the possibility of highly accurate measurement of temperature.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0921452621006554; http://dx.doi.org/10.1016/j.physb.2021.413496; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85118835573&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0921452621006554; https://dx.doi.org/10.1016/j.physb.2021.413496
Elsevier BV
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