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Thermally-Activated Delayed Fluorescence in Polymer-Small Molecule Exciplex Blends for Solution-Processed Organic Light-Emitting Diodes

Pander, Piotr Henryk; Gogoc, Szymon; Colella, Marco; Data, Przemyslaw; Dias, Fernando B.

Thermally-Activated Delayed Fluorescence in Polymer-Small Molecule Exciplex Blends for Solution-Processed Organic Light-Emitting Diodes Thumbnail


Authors

Szymon Gogoc

Marco Colella

Przemyslaw Data



Abstract

The photophysics of an exciplex state, formed between a small molecule and a polymer, is investigated in this work. The results obtained with this blend show the strong potential of polymer-small molecule blends for triplet harvesting in organic light emitting diodes (OLEDs) via thermally-activated delayed fluorescence. The exciplex formed between poly(N-vinylcarbazole) (PVK) and 2,4,6-tris[3-(diphenylphosphinyl)phenyl]-1,3,5-triazine (PO-T2T) shows yellow-green emission and is applied in solution processed OLEDs. The excellent film forming properties in this blend allow easy spin-coating and potential use in other solution-processing techniques, such as slot die coating. In this work we critically address the reverse intersystem crossing mechanism in the presented exciplex system, including the role of the local triplet state. Moreover, we bring a clear physical meaning to the exciplex emission decay components, including the decay occurring in a power-law fashion that is often ignored in the literature.

Citation

Pander, P. H., Gogoc, S., Colella, M., Data, P., & Dias, F. B. (2018). Thermally-Activated Delayed Fluorescence in Polymer-Small Molecule Exciplex Blends for Solution-Processed Organic Light-Emitting Diodes. ACS Applied Materials and Interfaces, 10(34), 28796-28802. https://doi.org/10.1021/acsami.8b07554

Journal Article Type Article
Acceptance Date Jul 25, 2018
Online Publication Date Jul 25, 2018
Publication Date Aug 29, 2018
Deposit Date Aug 1, 2018
Publicly Available Date Aug 23, 2018
Journal ACS Applied Materials and Interfaces
Print ISSN 1944-8244
Electronic ISSN 1944-8252
Publisher American Chemical Society
Peer Reviewed Peer Reviewed
Volume 10
Issue 34
Pages 28796-28802
DOI https://doi.org/10.1021/acsami.8b07554

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Copyright Statement
Advance online version This is an open access article published under a Creative Commons Attribution (CC-BY)
License, which permits unrestricted use, distribution and reproduction in any medium,
provided the author and source are cited.







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