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Lookup NU author(s): Dr Julien EngORCiD, Dr Theo Keane, Professor Thomas Penfold
This is the authors' accepted manuscript of an article that has been published in its final definitive form by Royal Society of Chemistry, 2019.
For re-use rights please refer to the publisher's terms and conditions.
Excited state energy transfer in disordered systems has attracted significant attention owing to the importance of this phenomenon in both artificial and natural systems that operate in electron- ically excited states. Of particular interest, especially in the context of organic electronics, is the dynamics of triplet excited states, which due to their weak coupling to the singlet manifold often act as low energy trapping sites and are therefore detrimental to device performance. Herein, we explore the triplet energy transfer mechanism from dichlorobenzene to thioxanthone in methanol solution. We rationalise previous experimental observations as arising from preferential popula- tion transfer into the lowest triplet state rather than the higher lying triplet state that is closer in energy. The reason for this is a delicate balance between the electronic coupling, reorganisation energy and the energy gap involved. The present results provide the understanding to potentially develop a hot exciton mechanism in materials for organic light emitting diodes (OLED) to achieve higher device efficiencies.
Author(s): Nothey T, Eng J, Keane T, Penfold TJ
Publication type: Article
Publication status: Published
Journal: Faraday Discussions
Year: 2019
Volume: 216
Pages: 395-413
Print publication date: 01/07/2019
Online publication date: 20/12/2018
Acceptance date: 03/12/2018
Date deposited: 20/12/2018
ISSN (print): 1359-6640
ISSN (electronic): 1364-5498
Publisher: Royal Society of Chemistry
URL: https://doi.org/10.1039/C8FD00174J
DOI: 10.1039/C8FD00174J
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