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Triphenylamine disubstituted naphthalene diimide : elucidation of excited states involved in TADF and application in near-infrared organic light emitting diodes.

Higginbotham, Heather F. and Pander, Piotr H. and Rybakiewicz, Renata and Etherington, Marc K. and Maniam, Subashani and Zagorska, Malgorzata and Pron, Adam and Data, Przemyslaw and Monkman, Andrew P. (2018) 'Triphenylamine disubstituted naphthalene diimide : elucidation of excited states involved in TADF and application in near-infrared organic light emitting diodes.', Journal of materials chemistry C., 6 (30). pp. 8219-8225.

Abstract

It is demonstrated that naphthalene diimide core disubstituted with triphenylamine can be used as a Thermally Activated Delayed Fluorescence emitter in Organic Light Emitting Diodes. Detailed spectroscopic studies demonstrated unusual host effects on the photophysical properties of this material. In particular, we were able to deduce recombination pathways and the role of the host and temperature in increasing/decreasing the TADF contribution in overall emission. Further, stemming from these host effects on the geometry of the emitter we discover different local triplet states involved in TADF mechanism. We elucidate this confusing situation to show that simply measuring low-temperature phosphorescence does not always give the energy of the local triplet involved in TADF. The studies carried out in non-polar polymer and the OLED host were completed by the NIR OLED fabrication showing promising characteristics.

Item Type:Article
Full text:(AM) Accepted Manuscript
First Live Deposit - 17 July 2018
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Status:Peer-reviewed
Publisher Web site:https://doi.org/10.1039/C8TC02936A
Record Created:17 Jul 2018 10:13
Last Modified:30 Jun 2019 01:02

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