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The theory of thermally activated delayed fluorescence for organic light emitting diodes

Penfold, T.J.; Dias, F.B.; Monkman, A.P.

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Authors

T.J. Penfold

A.P. Monkman



Abstract

The interest in organic molecules exhibiting Thermally Activated Delayed Fluorescence (TADF) has been reinvigorated in recent years owing to their potential to be exploited as emitters in highly efficient purely organic light emitting diodes (OLEDs). However, designing new molecules that exhibit efficient TADF is a non-trivial task because they would appear to require the optimisation of a number of contrasting properties. For example these molecules must exhibit rapid conversion between the singlet and triplet manifolds without the use of heavy elements to enhance spinorbit coupling. They should also display a large fluorescence rate, but simultaneously a small energy gap between low lying singlet and triplet states. Consequently to achieve systematic material design, a detailed understanding of the fundamental factors influencing the photophysical behaviour of TADF emitters is essential. Towards achieving this goal, theory and computation is playing a crucial role. In this feature article the recent progress in the theory of organic TADF molecules in the context of OLEDs is presented, with a view of achieving a deeper understanding of these molecules and driving systematic material design.

Citation

Penfold, T., Dias, F., & Monkman, A. (2018). The theory of thermally activated delayed fluorescence for organic light emitting diodes. Chemical Communications, 54(32), 3926-3935. https://doi.org/10.1039/c7cc09612g

Journal Article Type Article
Acceptance Date Mar 15, 2018
Online Publication Date Mar 16, 2018
Publication Date Mar 16, 2018
Deposit Date Sep 17, 2018
Publicly Available Date Nov 18, 2019
Journal Chemical Communications
Print ISSN 1359-7345
Electronic ISSN 1364-548X
Publisher Royal Society of Chemistry
Peer Reviewed Peer Reviewed
Volume 54
Issue 32
Pages 3926-3935
DOI https://doi.org/10.1039/c7cc09612g
Related Public URLs https://eprint.ncl.ac.uk/246949

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