Eder, Theresa and Stangl, Thomas and Gmelch, Max and Remmerssen, Klaas and Laux, Dirk and Hoeger, Sigurd and Lupton, John M. and Vogelsang, Jan (2017) Switching between H- and J-type electronic coupling in single conjugated polymer aggregates. NATURE COMMUNICATIONS, 8: 1641. ISSN 2041-1723,
Full text not available from this repository. (Request a copy)Abstract
The aggregation of conjugated polymers and electronic coupling of chromophores play a central role in the fundamental understanding of light and charge generation processes. Here we report that the predominant coupling in isolated aggregates of conjugated polymers can be switched reversibly between H-type and J-type coupling by partially swelling and drying the aggregates. Aggregation is identified by shifts in photoluminescence energy, changes in vibronic peak ratio, and photoluminescence lifetime. This experiment unravels the internal electronic structure of the aggregate and highlights the importance of the drying process in the final spectroscopic properties. The electronic coupling after drying is tuned between H-type and J-type by changing the side chains of the conjugated polymer, but can also be entirely suppressed. The types of electronic coupling correlate with chain morphology, which is quantified by excitation polarization spectroscopy and the efficiency of interchromophoric energy transfer that is revealed by the degree of single-photon emission.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ENERGY-TRANSFER; BICHROMOPHORIC MOLECULES; QUANTUM COHERENCE; ORGANIC PHOTOVOLTAICS; PHOTON STATISTICS; EXCITON MODEL; POLY(3-HEXYLTHIOPHENE); LIGHT; CHROMOPHORES; FLUORESCENCE; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Experimental and Applied Physics > Chair Professor Lupton > Group John Lupton |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 Dec 2018 13:19 |
| Last Modified: | 25 Feb 2019 14:52 |
| URI: | https://pred.uni-regensburg.de/id/eprint/1832 |
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