Please use this identifier to cite or link to this item: doi:10.22028/D291-29310
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Title: Identifying triplet pathways in dilute pentacene films
Author(s): Lubert-Perquel, Daphné
Salvadori, Enrico
Dyson, Matthew
Stavrinou, Paul N.
Montis, Riccardo
Nagashima, Hiroki
Kobori, Yasuhiro
Heutz, Sandrine
Kay, Christopher
Language: English
Title: Nature communications
Volume: 9
Issue: 1
Publisher/Platform: Nature Publishing Group
Year of Publication: 2018
Publikation type: Journal Article
Abstract: Building efficient triplet-harvesting layers for photovoltaic applications requires a deep understanding of the microscopic properties of the components involved and their dynamics. Singlet fission is a particularly appealing mechanism as it generates two excitons from a single photon. However, the pathways of the coupled triplets into free species, and their dependence on the intermolecular geometry, has not been fully explored. In this work, we produce highly ordered dilute pentacene films with distinct parallel and herringbone dimers and aggregates. Using electron paramagnetic resonance spectroscopy, we provide compelling evidence for the formation of distinct quintet excitons in ambient conditions, with intrinsically distinctive electronic and kinetic properties. We find that the ability of quintets to separate into free triplets is promoted in the parallel dimers and this provides molecular design rules to control the triplets, favouring either enhanced photovoltaic efficiency (parallel) or strongly bound pairs that could be exploited for logic applications (herringbone).
DOI of the first publication: 10.1038/s41467-018-06330-x
Link to this record: hdl:20.500.11880/27851
http://dx.doi.org/10.22028/D291-29310
ISSN: 2041-1723
Date of registration: 20-Sep-2019
Faculty: NT - Naturwissenschaftlich- Technische Fakultät
Department: NT - Chemie
Collections:UniBib – Die Universitätsbibliographie

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