Synergistic use of Raman and photoluminescence signals for optical thermometry with large temperature sensitivity
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...
Gespeichert in:
Veröffentlicht in: | Physica. B, Condensed matter Condensed matter, 2022-02, Vol.626, p.413455, Article 413455 |
---|---|
Hauptverfasser: | , , , , , |
Format: | Artikel |
Sprache: | eng |
Schlagworte: | |
Online-Zugang: | Volltext |
Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
Zusammenfassung: | 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.
•We present an alternative approach for luminescence based optical thermometry by using a combination of Raman and PL signals from rare-earth doped crystalline phosphors.•We have introduced Raman-PL intensity ratio (RPIR) as an alternative thermometric parameter to estimate temperature sensitivity in such a mode of optical thermometery.•We achieved (i) large temperature tuning of color (red↔blue/green) and (ii) large values of sensitivities in a wide temperature range: +6.4 %K-1 at 65 K, +2.4 %K-1 at 303 K using this strategy on a Eu doped BaTiO3. |
---|---|
ISSN: | 0921-4526 1873-2135 |
DOI: | 10.1016/j.physb.2021.413455 |