at Google ScholarTitle data
Stäter, Sebastian ; Wenzel, Felix ; Welz, Hannes ; Kreger, Klaus ; Köhler, Jürgen ; Schmidt, Hans-Werner ; Hildner, Richard:
Directed Gradients in the Excited-State Energy Landscape of Poly(3-hexylthiophene) Nanofibers.
In: Journal of the American Chemical Society.
Vol. 145
(2023)
Issue 25
.
- pp. 13780-13787.
ISSN 1520-5126
DOI: https://doi.org/10.1021/jacs.3c02117
Abstract in another language
Funneling excitation energy toward lower energy excited states is a key concept in photosynthesis, which is often realized with at most two chemically different types of pigment molecules. However, current synthetic approaches to establish energy funnels, or gradients, typically rely on Förster-type energy-transfer cascades along many chemically different molecules. Here, we demonstrate an elegant concept for a gradient in the excited-state energy landscape along micrometer-long supramolecular nanofibers based on the conjugated polymer poly(3-hexylthiophene), P3HT, as the single component. Precisely aligned P3HT nanofibers within a supramolecular superstructure are prepared by solution processing involving an efficient supramolecular nucleating agent. Employing hyperspectral imaging, we find that the lowest-energy exciton band edge continuously shifts to lower energies along the nanofibers’ growth direction. We attribute this directed excited-state energy gradient to defect fractionation during nanofiber growth. Our concept provides guidelines for the design of supramolecular structures with an intrinsic energy gradient for nanophotonic applications.
Further data
| Item Type: | Article in a journal |
|---|---|
| Refereed: | Yes |
| 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 |
| Result of work at the UBT: | Yes |
| DDC Subjects: | 500 Science > 530 Physics |
| Date Deposited: | 03 Aug 2023 06:34 |
| Last Modified: | 03 Aug 2023 06:34 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/86462 |