Optical Thermometry Based on Vibration Sidebands in Y2MgTiO6:Mn4+ Double Perovskite.
Inorg Chem
; 57(6): 3073-3081, 2018 Mar 19.
Article
em En
| MEDLINE
| ID: mdl-29498841
ABSTRACT
Mn4+-doped Y2MgTiO6 phosphors are synthesized by the traditional solid-state method. Powder X-ray diffraction, scanning electron microscope, and energy-dispersive X-ray spectrometer are employed to characterize the samples. The Mn4+-doped Y2MgTiO6 phosphors show the far-red emission at â¼715 nm, which is assigned to the 2Eg â 4A2 spin-forbidden transition of Mn4+. The temperature-dependent luminescent dynamics of Mn4+ is described by a complete model associated with electron-lattice interaction and spin-orbit coupling. The noncontact optical thermometry of Y2MgTiO6Mn4+ is discussed based on the fluorescence intensity ratio of thermally coupled anti-Stokes and Stokes sidebands of the efficient â¼715 nm far-red emission in the temperature range of 10-513 K. The maximum sensor sensitivity of Y2MgTiO6Mn4+ is determined to be as high as 0.001â¯42 K-1 at 153 K, which demonstrates potential applications for the optical thermometry at low-temperature environments.
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01-internacional
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MEDLINE
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En
Ano de publicação:
2018
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Article