Ultrafast Energy Transfer in Excitonically Coupled Molecules Induced by a Nonlocal Peierls Phonon
- Molecular vibration can influence exciton transfer via either a local (intramolecular) Holstein or a nonlocal (intermolecular) Peierls mode. We show that a strong vibronic coupling to a nonlocal mode dramatically speeds up the transfer by opening an additional transfer channel. This Peierls channel is rooted in the formation of a conical intersection of the excitonic potential energy surfaces. For increasing Peierls coupling, the electronically coherent transfer for weak coupling turns into an incoherent transfer of a localized exciton through the intersection for strong coupling. The interpretation in terms of a conical intersection intuitively explains recent experiments of ultrafast energy transfer in photosynthetic and photovoltaic molecular systems.
Author: | Hong-Guang Duan, Peter Nalbach, R. J. Dwayne Miller, Michael Thorwart |
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DOI: | https://doi.org/10.1021/acs.jpclett.9b00242 |
ISSN: | 1948-7185 |
Parent Title (English): | The Journal of Physical Chemistry (JPC) |
Document Type: | Article |
Language: | English |
Date of Publication (online): | 2020/02/24 |
Year of first Publication: | 2019 |
Publishing Institution: | Westfälische Hochschule Gelsenkirchen Bocholt Recklinghausen |
Release Date: | 2020/02/25 |
Volume: | 10 |
Issue: | 6 |
First Page: | 1206 |
Last Page: | 1211 |
Departments / faculties: | Fachbereiche / Wirtschaft und Informationstechnik Bocholt |
Licence (German): | Es gilt das Urheberrechtsgesetz |