Please use this identifier to cite or link to this item:
https://hdl.handle.net/2440/111309
Citations | ||
Scopus | Web of Science® | Altmetric |
---|---|---|
?
|
?
|
Type: | Journal article |
Title: | Endothermic singlet fission is hindered by excimer formation |
Author: | Dover, C. Gallaher, J. Frazer, L. Tapping, P. Petty, A. Crossley, M. Anthony, J. Kee, T. Schmidt, T. |
Citation: | Nature Chemistry, 2018; 10(3):305-310 |
Publisher: | Nature Publishing Group |
Issue Date: | 2018 |
ISSN: | 1755-4330 1755-4349 |
Statement of Responsibility: | Cameron 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 |
Abstract: | Singlet 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. |
Keywords: | Energy transfer; excited states; reaction kinetics and dynamics; light harvesting; optical spectroscopy |
Rights: | © 2018 Macmillan Publishers Limited, part of Springer Nature. All rights reserved. |
DOI: | 10.1038/nchem.2926 |
Grant ID: | http://purl.org/au-research/grants/arc/FT130100177 http://purl.org/au-research/grants/arc/CE170100026 http://purl.org/au-research/grants/arc/DP160103797 http://purl.org/au-research/grants/arc/LE0989747 |
Published version: | http://dx.doi.org/10.1038/nchem.2926 |
Appears in Collections: | Aurora harvest 3 Chemistry publications |
Files in This Item:
There are no files associated with this item.
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.