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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.
Bd. 145
(2023)
Heft 25
.
- S. 13780-13787.
ISSN 1520-5126
DOI: https://doi.org/10.1021/jacs.3c02117
Abstract
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.
Weitere Angaben
| Publikationsform: | Artikel in einer Zeitschrift |
|---|---|
| Begutachteter Beitrag: | Ja |
| Institutionen der Universität: | Fakultäten > Fakultät für Mathematik, Physik und Informatik > Physikalisches Institut > Lehrstuhl Experimentalphysik IX - Spektroskopie weicher Materie > Lehrstuhl Experimentalphysik IX - Spektroskopie weicher Materie - Univ.-Prof. Dr. Jürgen Köhler |
| Titel an der UBT entstanden: | Ja |
| Themengebiete aus DDC: | 500 Naturwissenschaften und Mathematik > 530 Physik |
| Eingestellt am: | 03 Aug 2023 06:34 |
| Letzte Änderung: | 03 Aug 2023 06:34 |
| URI: | https://eref.uni-bayreuth.de/id/eprint/86462 |