Synergistic use of Raman and photoluminescence signals for optical thermometry with large temperature sensitivity

De, A and Dwij, V and Sathe, V and Hernández-Rodríguez, MA and Carlos, LD and Ranjan, R (2022) Synergistic use of Raman and photoluminescence signals for optical thermometry with large temperature sensitivity. In: Physica B: Condensed Matter, 626 .

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Abstract

In this work we demonstrate that large temperature sensitivity over a wider temperature range is possible by adopting the dual use of Raman and photoluminescence (PL) signals emitted by rare-earth doped crystalline phosphors when excited by a suitable laser light. We define Raman-PL-intensity ratio (RPIR) as an alternative thermometric parameter to define temperature sensitivity and exploited the contrasting effect of temperature on the intensities of the PL and Raman lines of a Eu3+-doped BaTiO3 ferroelectric phosphor and achieved large temperature tuning of color (red � blue/green) and large relative temperature sensitivities in a wide temperature range: +6.4 K�1 at 65 K, +2.4 K�1 at 303 K. Our strategy offers greater flexibility for the design of phosphor systems for optical thermometry with high sensitivity. © 2021 Elsevier B.V.

Item Type:	Journal Article
Publication:	Physica B: Condensed Matter
Publisher:	Elsevier B.V.
Additional Information:	The copyright for this article belongs to Elsevier B.V.
Keywords:	Barium titanate; Ferroelectric materials; Ferroelectricity; Phosphors; Photoluminescence; Rare earths; Thermometers, Crystalline phosphors; Dual use; Eu3+ emission; Laser lights; Optical thermometry; Photoluminescence signals; Raman signal; Rare earth doped; Temperature sensitivity; Wide temperature ranges, Europium compounds
Department/Centre:	Division of Mechanical Sciences > Materials Engineering (formerly Metallurgy)
Date Deposited:	03 Dec 2021 08:50
Last Modified:	11 Sep 2022 04:51
URI:	https://eprints.iisc.ac.in/id/eprint/70634

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