Dokument: Ratiometric Boltzmann thermometry with Cr3+ in strong ligand fields: Efficient nonradiative coupling for record dynamic working ranges
| Titel: | Ratiometric Boltzmann thermometry with Cr3+ in strong ligand fields: Efficient nonradiative coupling for record dynamic working ranges | |||||||
| URL für Lesezeichen: | https://docserv.uni-duesseldorf.de/servlets/DocumentServlet?id=71991 | |||||||
| URN (NBN): | urn:nbn:de:hbz:061-20260122-140953-7 | |||||||
| Kollektion: | Publikationen | |||||||
| Sprache: | Englisch | |||||||
| Dokumententyp: | Wissenschaftliche Texte » Artikel, Aufsatz | |||||||
| Medientyp: | Text | |||||||
| Autoren: | Kinik, Gülsüm [Autor] Bendel, Benedikt [Autor] Suta, Markus [Autor] Widmann, Ingo [Autor] Huppertz, Hubert [Autor] Meijerink, Andries [Autor] | |||||||
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| Beschreibung: | A new ratiometric Boltzmann thermometry approach is presented for the narrow-line red-emitting bright phosphor Al0.993Cr0.007B4O6N. It relies on thermalization between the two excited states 2Eg(2G) and 2T1g(2G) of Cr3+ with an energy gap of 620 cm−1 for optimized thermometry at room temperature. It is shown that nonradiative coupling between these excited states is very fast, with rates in the order of several µs−1. Due to the comparably slow radiative decay (kr = 0.033 ms−1) of the lowest excited 2Eg(2G) state, the dynamic working range of this Boltzmann thermometer for the deep red spectral range is exceptionally wide, between <77 K and >873 K, even outperforming the classic workhorse example of Er3+. At temperatures above 340 K, also spectrally well-resolved broad-band emission due to the spin-allowed 4T2g(4F) → 4A2g(4F) transition is detectable, which simultaneously offers a possibility of very sensitive (Sr(500 K) > 2% K−1) ratiometric Boltzmann-type crossover thermometry for higher temperatures. These findings imply that Al0.993Cr0.007B4O6N is a particularly robust and bright red luminescent thermometer with a record-breaking dynamic working range for a luminescent transition metal ion. | |||||||
| Rechtliche Vermerke: | Originalveröffentlichung:
Kinik, G., Widmann, I., Bendel, B., Huppertz, H., Meijerink, A., & Suta, M. (2025). Ratiometric Boltzmann thermometry with Cr3+ in strong ligand fields: Efficient nonradiative coupling for record dynamic working ranges. Light : Science & Applications, 14, Article 388. https://doi.org/10.1038/s41377-025-02082-8 | |||||||
| Lizenz: |  Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz | |||||||
| Fachbereich / Einrichtung: | Mathematisch- Naturwissenschaftliche Fakultät | |||||||
| Dokument erstellt am: | 22.01.2026 | |||||||
| Dateien geändert am: | 22.01.2026 |
