at Google ScholarTitle data
Köhler, Jürgen ; Hucke, M. ; Schmid, D. ; Ashida, Masaaki ; Kato, Riso:
Relaxation and coherence of singlet-excitons in NaNO₂ crystals.
In: Journal of Luminescence.
Vol. 53
(1992)
Issue 1-6
.
- pp. 76-79.
ISSN 0022-2313
DOI: https://doi.org/10.1016/0022-2313(92)90110-U
Abstract in another language
Dealing with intermolecular energy-transfer processes it is an interesting question whether the energy is transferred by a wave-like (coherent) or by a diffusion-like (incoherent) process. From former studies it was known that the first excited singlet state of NaNO2 can be described as a Frenkel-type exciton. Monitoring the fluorescence resulting from the decay of this exciton one observes that at 4 K thermal population within the exciton band is not established during the exciton lifetime of 8 ns. By the use of fluorescence line narrowing, where the detection of the signal is delayed with respect to the excitation, it was possible to obtain the temperature dependence of the thermalization process. Even at 11.5 K it takes 35 ns until the excitons populate the whole band. The interpretation of the data in terms of exciton k memory leads to the conclusion that between 11 and 15 K the nature of the energy transfer changes from coherent to incoherent.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| Keywords: | NaNO2 |
| Institutions of the University: | Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics IX - Spectroscopy of Soft Matter > Chair Experimental Physics IX - Spectroscopy of Soft Matter - Univ.-Prof. Dr. Jürgen Köhler Faculties Faculties > Faculty of Mathematics, Physics und Computer Science Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Experimental Physics IX - Spectroscopy of Soft Matter |
| Result of work at the UBT: | No |
| DDC Subjects: | 500 Science > 530 Physics |
| Date Deposited: | 12 Apr 2018 12:44 |
| Last Modified: | 16 Apr 2018 09:40 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/43348 |