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.

doi:10.1021/acsami.8b07554

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.

Authors

Piotr Pander piotr.h.pander@durham.ac.uk
Academic Visitor

Szymon Gogoc

Marco Colella

Przemyslaw Data

Dr Fernando Dias f.m.b.dias@durham.ac.uk
Associate Professor

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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