Dokument: Deep Seek to the Excited States: A Thermally‐Activated Jahn–Teller Effect Achieves Superior Sensitivity for Thermometry at Cryogenic Temperature
| Titel: | Deep Seek to the Excited States: A Thermally‐Activated Jahn–Teller Effect Achieves Superior Sensitivity for Thermometry at Cryogenic Temperature | |||||||
| URL für Lesezeichen: | https://docserv.uni-duesseldorf.de/servlets/DocumentServlet?id=72195 | |||||||
| URN (NBN): | urn:nbn:de:hbz:061-20260206-124946-4 | |||||||
| Kollektion: | Publikationen | |||||||
| Sprache: | Englisch | |||||||
| Dokumententyp: | Wissenschaftliche Texte » Artikel, Aufsatz | |||||||
| Medientyp: | Text | |||||||
| Autoren: | Suta, Markus [Autor] Wang, Weihao [Autor] Zeng, Fang [Autor] Liu, Guixin [Autor] Xia, Shihan [Autor] Zheng, Yuhui [Autor] Wang, Qianming [Autor] | |||||||
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| Beschreibung: | Boltzmann equilibrium is not always achieved at the lower temperature limit for a typical ratiometric thermometer with thermally coupled excited states.
The universal approach to broaden the dynamic temperature range of all Boltzmann-type thermometers still remains a challenge. Herein, a bismuth-based halide single crystal (DMA4 BiCl 7 : Sb3+, DMA is referred to as dimethylammonium) shifts the onset temperature by ≈200 K. It also provides trustworthy experimental evidence in observing a thermally-driven process from 3 P1 state to AT minima. The action of both spin-orbit coupling and the dynamic Jahn–Teller effect represented by large effective Huang-Rhys factors (S1 = 32.44, S2 = 42.51) is responsible for maximizing the opposite emission changes at different temperatures and overcomes the thermodynamic limitations of the traditional thermally coupled energy levels. A high relative sensitivity (Sr ) value of 18.9 % K−1 is obtained at 77 K. It finds application potential in extending the temperature window to cover the cryogenic range from 77 K to 277 K with constantly high accuracy (temperature uncertainty 𝜹T = 0.065 K at 77 K). Moreover, a new way is developed to visualize temperature mapping via grayscale imaging tools in determining the temperature distribution of a real sample is demonstrated. anti-thermal quenching; hybrid metal halide; temperature mapping; thermally activated; thermometer | |||||||
| Rechtliche Vermerke: | Originalveröffentlichung:
Wang, W., Zeng, F., Liu, G., Xia, S., Zheng, Y., Suta, M., & Wang, Q. (2025). Deep Seek to the Excited States: A Thermally‐Activated Jahn–Teller Effect Achieves Superior Sensitivity for Thermometry at Cryogenic Temperature. Advanced Optical Materials, 13(32), Article e02180. https://doi.org/10.1002/adom.202502180 | |||||||
| Lizenz: |  Dieses Werk ist lizenziert unter einer Creative Commons Namensnennung 4.0 International Lizenz | |||||||
| Fachbereich / Einrichtung: | Mathematisch- Naturwissenschaftliche Fakultät | |||||||
| Dokument erstellt am: | 06.02.2026 | |||||||
| Dateien geändert am: | 06.02.2026 |
