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A deep-blue-emitting heteroatom-doped MR-TADF nonacene for high-performance organic light-emitting diodes

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Date
16/01/2023
Author
Madayanad Suresh, Subeesh
Zhang, Le
Hall, David
Si, Changfeng
Ricci, Gaetano
Matulaitis, Tomas
Slawin, Alexandra M. Z.
Warriner, Stuart
Olivier, Yoann
Samuel, Ifor D.
Zysman-Colman, Eli
Funder
European Commission
The Leverhulme Trust
EPSRC
EPSRC
Grant ID
838885
RPG-2016-047
ep/l017008/1
EP/P010482/1
Keywords
Multiresonant thermally activated delayed fluorescence
MR-TADF
Organic light-emitting diodes
OLEDs
Boron-doped acenes
QD Chemistry
DAS
MCP
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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, ΦPL 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).
Citation
Madayanad Suresh , S , Zhang , L , Hall , D , Si , C , Ricci , G , Matulaitis , T , Slawin , A M Z , Warriner , S , Olivier , Y , Samuel , I D & Zysman-Colman , E 2023 , ' A deep-blue-emitting heteroatom-doped MR-TADF nonacene for high-performance organic light-emitting diodes ' , Angewandte Chemie International Edition , vol. Early View , e202215522 . https://doi.org/10.1002/anie.202215522
Publication
Angewandte Chemie International Edition
Status
Peer reviewed
DOI
https://doi.org/10.1002/anie.202215522
ISSN
1433-7851
Type
Journal article
Rights
Copyright © 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, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
Description
This project has received funding from the European Union’s Horizon 2020 research and innovation programme under the Marie Skłodowska Curie grant agreement No 838885 (NarrowbandSSL). S.M.S. acknowledges support from the Marie Skłodowska-Curie Individual Fellowship (grant agreement No 838885 NarrowbandSSL). We would like to thank the Leverhulme Trust (RPG-2016-047) for financial support. E.Z-C. and I.D.W.S acknowledge support from EPSRC (EP/L017008, EP/P010482/1). Computational resources have been provided by the Consortium des Équipements de Calcul Intensif (CÉCI), funded by the Fonds de la Recherche Scientifiques de Belgique (F. R. S.-FNRS) under Grant No. 2.5020.11, as well as the Tier-1 supercomputer of the Fédération Wallonie-Bruxelles, infrastructure funded by the Walloon Region under the grant agreement n1117545. Y.O. acknowledges funding by the Fonds de la Recherche Scientifique-FNRS under Grant n° F.4534.21 (MIS-IMAGINE). G. R. acknowledges a grant from the ‘‘Fonds pour la formation a la Recherche dans l’Industrie et dans l’Agriculture’’ (FRIA) of the FRS-FNRS.
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  • University of St Andrews Research
URI
http://hdl.handle.net/10023/26762

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