Bossanyi, D.G. orcid.org/0000-0002-8804-802X, Matthiesen, M., Wang, S. et al. (9 more authors) (2021) Emissive spin-0 triplet-pairs are a direct product of triplet–triplet annihilation in pentacene single crystals and anthradithiophene films. Nature Chemistry, 13 (2). pp. 163-171. ISSN 1755-4330
Abstract
Singlet fission and triplet–triplet annihilation represent two highly promising ways of increasing the efficiency of photovoltaic devices. Both processes are believed to be mediated by a biexcitonic triplet-pair state, 1(TT). Recently however, there has been debate over the role of 1(TT) in triplet–triplet annihilation. Here we use intensity-dependent, low-temperature photoluminescence measurements, combined with kinetic modelling, to show that distinct 1(TT) emission arises directly from triplet–triplet annihilation in high-quality pentacene single crystals and anthradithiophene (diF-TES-ADT) thin films. This work demonstrates that a real, emissive triplet-pair state acts as an intermediate in both singlet fission and triplet–triplet annihilation and that this is true for both endo- and exothermic singlet fission materials.
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Copyright, Publisher and Additional Information: | © The Author(s), under exclusive licence to Springer Nature Limited 2020. This is an author-produced version of a paper subsequently published in Nature Chemistry. Uploaded in accordance with the publisher's self-archiving policy. | ||||||||||
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Institution: | The University of Sheffield | ||||||||||
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Chemistry (Sheffield) The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
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Depositing User: | Symplectic Sheffield | ||||||||||
Date Deposited: | 01 Mar 2021 15:53 | ||||||||||
Last Modified: | 07 Jun 2021 00:38 | ||||||||||
Status: | Published | ||||||||||
Publisher: | Springer Science and Business Media LLC | ||||||||||
Refereed: | Yes | ||||||||||
Identification Number: | https://doi.org/10.1038/s41557-020-00593-y | ||||||||||
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