Judicious heteroatom doping produces high-performance deep blue/near-UV multiresonant thermally activated delayed fluorescence OLEDs
Date
17/08/2023Author
Grant ID
ep/l017008/1
838885
RPG-2016-047
EP/P010482/1
EP/P010482/1
Keywords
Metadata
Show full item recordAbstract
Two multiresonant thermally activated delayed fluorescence (MR-TADF) emitters are presented and it is shown how further borylation of a deep-blue MR-TADF emitter, DIDOBNA-N, both blueshifts and narrows the emission producing a new near-UV MR-TADF emitter, MesB-DIDOBNA-N, are shown. DIDOBNA-N emits bright blue light (ΦPL = 444 nm, FWHM = 64 nm, ΦPL = 81%, τd = 23 ms, 1.5 wt% in TSPO1). The deep-blue organic light-emitting diode (OLED) based on this twisted MR-TADF compound shows a very high maximum external quantum efficiency (EQEmax) of 15.3% for a device with CIEy of 0.073. The fused planar MR-TADF emitter, MesB-DIDOBNA-N shows efficient and narrowband near-UV emission (λPL = 402 nm, FWHM = 19 nm, ΦPL = 74.7%, τd = 133 ms, 1.5 wt% in TSPO1). The best OLED with MesB-DIDOBNA-N, doped in a co-host, shows the highest efficiency reported for a near-UV OLED at 16.2%. With a CIEy coordinate of 0.049, this device also shows the bluest EL reported for a MR-TADF OLED to date.
Citation
Madayanad Suresh , S , Zhang , L , Matulaitis , T , Hall , D , Si , C , Ricci , G , Slawin , A M Z , Warriner , S , Beljonne , D , Olivier , Y , Samuel , I D W & Zysman-Colman , E 2023 , ' Judicious heteroatom doping produces high-performance deep blue/near-UV multiresonant thermally activated delayed fluorescence OLEDs ' , Advanced Materials , vol. 35 , no. 33 , 2300997 . https://doi.org/10.1002/adma.202300997
Publication
Advanced Materials
Status
Peer reviewed
ISSN
0935-9648Type
Journal article
Description
Funding: 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). The authors 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). D.B. is a FNRS Research Director. G.R. acknowledges a grant from the “Fonds pour la formation à la Recherche dans l'Industrie et dans l'Agriculture” (FRIA) of the FRS-FNRS.Collections
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