Musser, A.J. orcid.org/0000-0002-4600-6606 and Clark, J. orcid.org/0000-0001-9664-967X (2019) Triplet-pair states in organic semiconductors. Annual Review of Physical Chemistry, 70 (1). pp. 323-351. ISSN 0066-426X
Abstract
Entanglement of states is one of the most surprising and counterintuitive consequences of quantum mechanics, with potent applications in cryptography and computing. In organic semiconductor materials, one particularly significant manifestation is the spin-entangled triplet-pair state, which consists of a pair of localized triplet excitons coupled into an overall spin-0, -1, or -2 configuration. The most widely analyzed of these is the spin-0 pair, denoted 1(TT), which was initially invoked in the 1960s to explain delayed fluorescence in acene films. It is considered an essential gateway state for triplet-triplet annihilation and the reverse process, singlet fission, enabling interconversion between one singlet and two triplet excitons without any change in overall spin. This state has returned to the forefront of organic materials research in recent years, thanks both to its central role in the resurgent field of singlet fission and to its implication in a host of exotic new photophysical behaviors. Here we review the properties of triplet-pair states, from first principles to recent experimental results.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2019 Annual Reviews. |
Keywords: | triplet pair; entanglement; quintet; singlet fission; triplet-triplet annihilation; exchange coupling |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Science (Sheffield) > Department of Physics and Astronomy (Sheffield) |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 21 Aug 2020 07:16 |
Last Modified: | 21 Aug 2020 07:16 |
Status: | Published |
Publisher: | Annual Reviews |
Refereed: | Yes |
Identification Number: | 10.1146/annurev-physchem-042018-052435 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:164718 |