De, A and Mishra, A and Khatua, DK and Dwij, V and Sathe, V and Jena, S and Ranjan, R (2022) Optical temperature sensing by tuning photoluminescence in a wide (visible to near infrared) wavelength range in a Eu3+-doped Bi-based relaxor ferroelectric. In: Optics Letters, 47 (3). pp. 489-492.
Full text not available from this repository. (Request a copy)Abstract
The prevalent material design principles for optical thermometry primarily rely on thermally driven changes in the relative intensities of the thermally coupled levels (TCLs) of rare-earth-doped phosphor materials, where the maximum achievable sensitivity is limited by the energy gap between the TCLs. In this work, a new, to the best of our knowledge, approach to thermometric material design is proposed, which is based on temperature tuning of PL emission from the visible to the NIR region. We demonstrate a model ferroelectric phosphor, Eu3+-doped 0.94(Na1/2Bi1/2TiO3)-0.06(BaTiO3) (NBT-6BT), which, by virtue of the contrasting effects of temperature on PL signals from the host and Eu3+ intraband transitions, can achieve a relative thermal sensitivity as high as 3.05 K-1. This model system provides a promising alternative route for developing self-referencing optical thermometers with high thermal sensitivity and good signal discriminability. © 2022 Optical Society of America
| Item Type: | Journal Article |
|---|---|
| Publication: | Optics Letters |
| Publisher: | The Optical Society |
| Additional Information: | The copyright for this article belongs to The Optical Society |
| Keywords: | Barium titanate; Ferroelectricity; Infrared devices; Light emission; Phosphors; Temperature; Temperature sensors; Thermometers; Tuning, Bi-based; Design Principles; Materials design; Near-infrared wavelength; Optical temperature sensing; Optical thermometry; Relaxor ferroelectric; Thermal sensitivity; Thermally driven; Wavelength ranges, Rare earths |
| Department/Centre: | Division of Chemical Sciences > Inorganic & Physical Chemistry Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy) |
| Date Deposited: | 07 Feb 2022 12:06 |
| Last Modified: | 07 Feb 2022 12:06 |
| URI: | http://eprints.iisc.ac.in/id/eprint/71233 |
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