Please use this identifier to cite or link to this item: https://hdl.handle.net/2440/111309
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dc.contributor.authorDover, C.-
dc.contributor.authorGallaher, J.-
dc.contributor.authorFrazer, L.-
dc.contributor.authorTapping, P.-
dc.contributor.authorPetty, A.-
dc.contributor.authorCrossley, M.-
dc.contributor.authorAnthony, J.-
dc.contributor.authorKee, T.-
dc.contributor.authorSchmidt, T.-
dc.date.issued2018-
dc.identifier.citationNature Chemistry, 2018; 10(3):305-310-
dc.identifier.issn1755-4330-
dc.identifier.issn1755-4349-
dc.identifier.urihttp://hdl.handle.net/2440/111309-
dc.description.abstractSinglet fission is a process whereby two triplet excitons can be produced from one photon, potentially increasing the efficiency of photovoltaic devices. Endothermic singlet fission is desired for a maximum energy-conversion efficiency, and such systems have been considered to form an excimer-like state with multiexcitonic character prior to the appearance of triplets. However, the role of the excimer as an intermediate has, until now, been unclear. Here we show, using 5,12-bis((triisopropylsilyl)ethynyl)tetracene in solution as a prototypical example, that, rather than acting as an intermediate, the excimer serves to trap excited states to the detriment of singlet-fission yield. We clearly demonstrate that singlet fission and its conjugate process, triplet-triplet annihilation, occur at a longer intermolecular distance than an excimer intermediate would impute. These results establish that an endothermic singlet-fission material must be designed to avoid excimer formation, thus allowing singlet fission to reach its full potential in enhancing photovoltaic energy conversion.-
dc.description.statementofresponsibilityCameron B. Dover, Joseph K. Gallaher, Laszlo Frazer, Patrick C. Tapping, Anthony J. Petty II, Maxwell J. Crossley, John E. Anthony, Tak W. Kee and Timothy W. Schmidt-
dc.language.isoen-
dc.publisherNature Publishing Group-
dc.rights© 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved.-
dc.source.urihttp://dx.doi.org/10.1038/nchem.2926-
dc.subjectEnergy transfer; excited states; reaction kinetics and dynamics; light harvesting; optical spectroscopy-
dc.titleEndothermic singlet fission is hindered by excimer formation-
dc.typeJournal article-
dc.identifier.doi10.1038/nchem.2926-
dc.relation.granthttp://purl.org/au-research/grants/arc/FT130100177-
dc.relation.granthttp://purl.org/au-research/grants/arc/CE170100026-
dc.relation.granthttp://purl.org/au-research/grants/arc/DP160103797-
dc.relation.granthttp://purl.org/au-research/grants/arc/LE0989747-
pubs.publication-statusPublished-
dc.identifier.orcidTapping, P. [0000-0002-2359-1304]-
dc.identifier.orcidKee, T. [0000-0002-4907-4663]-
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