TY - JOUR
T1 - A Deep-Blue-Emitting Heteroatom-Doped MR-TADF Nonacene for High-Performance Organic Light-Emitting Diodes**
AU - Madayanad Suresh, Subeesh
AU - Zhang, Le
AU - Hall, David
AU - Si, Changfeng
AU - Ricci, Gaetano
AU - Matulaitis, Tomas
AU - Slawin, Alexandra M.Z.
AU - Warriner, Stuart
AU - Olivier, Yoann
AU - Samuel, Ifor D.W.
AU - Zysman-Colman, Eli
N1 - Funding Information:
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. We would like to thank Mr. David Webster for the assistance with the ambient pressure photoemission spectroscopy (APS) measurements, and Dr. Joydip De for the assistance with the TGA/DSC measurements.
Funding Information:
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. We would like to thank Mr. David Webster for the assistance with the ambient pressure photoemission spectroscopy (APS) measurements, and Dr. Joydip De for the assistance with the TGA/DSC measurements.
Publisher Copyright:
© 2022 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.
PY - 2023/2/13
Y1 - 2023/2/13
N2 - 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).
AB - 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).
KW - Deep Blue Emission
KW - Multi-Resonance
KW - Nanographene
KW - Organic Light-Emitting Diode
KW - Thermally Activated Delayed Fluorescence
UR - http://www.scopus.com/inward/record.url?scp=85146350796&partnerID=8YFLogxK
U2 - 10.1002/anie.202215522
DO - 10.1002/anie.202215522
M3 - Article
C2 - 36480790
AN - SCOPUS:85146350796
SN - 1433-7851
VL - 62
JO - Angewandte Chemie - International Edition
JF - Angewandte Chemie - International Edition
IS - 8
M1 - e202215522
ER -