Madayanad Suresh, S, Zhang, L, Hall, D et al. (8 more authors) (2023) A Deep-Blue-Emitting Heteroatom-Doped MR-TADF Nonacene for High-Performance Organic Light-Emitting Diodes. Angewandte Chemie International Edition, 62 (8). e202215522. ISSN 1433-7851
Abstract
We present a p- and n-doped nonacene compound, NOBNacene, that represents a rare example of a linearly extended ladder-type multiresonant thermally activated delayed fluorescence (MR-TADF) emitter. This compound shows efficient narrow deep blue emission, with a λPL of 410 nm, full width at half maximum, FWHM, of 38 nm, photoluminescence quantum yield, ФPL of 71%, and a delayed lifetime, τd of 1.18 ms in 1.5 wt% TSPO1 thin film. The organic light-emitting diode (OLED) using this compound as the emitter shows a comparable electroluminescence spectrum peaked at 409 nm (FWHM = 37 nm) and a maximum external quantum efficiency (EQEmax) of 8.5% at Commission Internationale de l'Éclairage (CIE) coordinates of (0.173, 0.055). The EQEmax values were increased to 11.2% at 3 wt% doping of the emitter within the emissive layer of the device. At this concentration, the electroluminescence spectrum broadened slightly, leading to CIE coordinates of (0.176, 0.068).
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH This is an open access article under the terms of the Creative Commons Attribution License (CC-BY 4.0), which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
Keywords: | Deep Blue Emission, Multi-Resonance, Nanographene, Organic Light-Emitting Diode, Thermally Activated Delayed Fluorescence |
Dates: |
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Institution: | The University of Leeds |
Academic Units: | The University of Leeds > Faculty of Engineering & Physical Sciences (Leeds) > School of Chemistry (Leeds) > Organic Chemistry (Leeds) |
Depositing User: | Symplectic Publications |
Date Deposited: | 19 Jan 2023 12:26 |
Last Modified: | 25 Jun 2023 23:13 |
Status: | Published |
Publisher: | Wiley |
Identification Number: | 10.1002/anie.202215522 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:195265 |