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Emissive spin-0 triplet-pairs are a direct product of triplet-triplet annihilation in pentacene single crystals and anthradithiophene films

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-...

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Main Authors: Bossanyi, David G. (Author) , Matthiesen, Maik (Author) , Wang, Shuangqing (Author) , Smith, Joel (Author) , Kilbride, Rachel C. (Author) , Shipp, James D. (Author) , Chekulaev, Dimitri (Author) , Holland, Emma (Author) , Anthony, John E. (Author) , Zaumseil, Jana (Author) , Musser, Andrew J. (Author) , Clark, Jenny (Author)
Format: Article (Journal)
Language:English
Published: 2021
In: Nature chemistry
Year: 2021, Volume: 13, Issue: 2, Pages: 163-171
ISSN:1755-4349
DOI:10.1038/s41557-020-00593-y
Online Access:Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1038/s41557-020-00593-y
Verlag, lizenzpflichtig, Volltext: https://www.nature.com/articles/s41557-020-00593-y
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Author Notes:David G. Bossanyi, Maik Matthiesen, Shuangqing Wang, Joel A. Smith, Rachel C. Kilbride, James D. Shipp, Dimitri Chekulaev, Emma Holland, John E. Anthony, Jana Zaumseil, Andrew J. Musser and Jenny Clark
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Summary: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.
Item Description:Gesehen am 14.12.2023
Physical Description:Online Resource
ISSN:1755-4349
DOI:10.1038/s41557-020-00593-y

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