Molecular design strategy for a two-component gel based on a thermally activated delayed fluorescence emitter
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Luminescent materials that can spontaneously assemble into highly ordered networks are essential to improve the quality of thin films in stacked device architectures and enhance the performances of solution processed OLEDs. Herein, we report two pyridine-decorated thermally activated delayed fluorescence (TADF) emitters, 3PyCzBP and 4PyCzBP . 4PyCzBP shows robust two component gel formation in the presence of either tartaric acid or succinic acid along with significant emission enhancement. Morphology studies reveal that these gels consist of homogeneous nanofibers assembled in hierarchical supramolecular networks. Transient photoluminescence spectra confirm that the gels emit via a TADF mechanism, making them the first examples of TADF gels. These nanofibers are promising candidates as self-assembled emitting nanofibers in thin films in solution-processed OLEDs.
Pachai Gounder , R , Rota Martir , D & Zysman-Colman , E 2018 , ' Molecular design strategy for a two-component gel based on a thermally activated delayed fluorescence emitter ' , ACS Applied Energy Materials , vol. In press . https://doi.org/10.1021/acsaem.7b00161
ACS Applied Energy Materials
Copyright © 2018 American Chemical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://doi.org/10.1021/acsaem.7b00161
DescriptionThe authors thank the Marie Skłodowska-Curie Individual Fellowship (MCIF, no 749557), the Leverhulme Trust (RPG-2016-047) and EPSRC (EP/P010482/1) for financial support. We thank the EPSRC UK National Mass Spectrometry Facility at Swansea University for analytical services.
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