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dc.contributor.authorWu, Sen
dc.contributor.authorGupta, Abhishek Kumar
dc.contributor.authorYoshida, Kou
dc.contributor.authorGong, Junyi
dc.contributor.authorHall, David
dc.contributor.authorCordes, David B.
dc.contributor.authorSlawin, Alexandra M. Z.
dc.contributor.authorSamuel, Ifor D. W.
dc.contributor.authorZysman-Colman, Eli
dc.identifier.citationWu , S , Gupta , A K , Yoshida , K , Gong , J , Hall , D , Cordes , D B , Slawin , A M Z , Samuel , I D W & Zysman-Colman , E 2022 , ' Highly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emitters ' , Angewandte Chemie International Edition , vol. 61 , no. 52 , e202213697 .
dc.identifier.otherPURE: 281895677
dc.identifier.otherPURE UUID: 5c441a69-89a7-4988-bf7e-537cbafd28c9
dc.identifier.otherRIS: urn:F67ED02A79F46AF7D8EBB29946B8E3CA
dc.identifier.otherORCID: /0000-0002-9527-6418/work/123614043
dc.identifier.otherORCID: /0000-0002-5366-9168/work/123614171
dc.identifier.otherORCID: /0000-0002-9995-6525/work/123614380
dc.identifier.otherORCID: /0000-0001-7183-6022/work/123614574
dc.identifier.otherScopus: 85143229733
dc.identifier.otherWOS: 000888992100001
dc.descriptionFunding: S. W. thanks the China Scholarship Council (201906250199). A. K. G. is grateful to the Royal Society for Newton International Fellowship NF171163. EZ-C and IDWS acknowledge support from EPSRC (EP/L017008, EP/P010482/1). We are also grateful for financial support from the University of St Andrews Restarting Research Funding Scheme (SARRF) which is funded through the Scottish Funding Council grant reference SFC/AN/08/020. EZ-C is a Royal Society Leverhulme Trust Senior Research fellow (SRF\R1\201089). We would also like to thank the Leverhulme Trust (RPG-2016-047) for financial support.en
dc.description.abstractHerein, we demonstrate how judicious selection of donor decorating a central multi-resonant thermally activated delayed fluorescence (MR-TADF) core based on DiKTa can lead to very high-performance OLEDs. Decorating the DiKTa core with triphenylamine (TPA) and diphenylamine (DPA), 3TPA-DiKTa and 3DPA-DiKTa exhibit bright, narrowband green and red emission in doped films, respectively. The OLEDs based on these emitters showed record-high performance with maximum external quantum efficiencies (EQEmax) for this family of emitters, with a EQEmax of 30.8% for 3TPA-DiKTa at λEL of 551 nm and 16.7% for 3DPA-DiKTa at λEL of 613 nm. The efficiency roll-off in the OLEDs was improved significantly by using 4CzIPN as an assistant dopant in hyperfluorescence (HF) devices. The outstanding device performance has been attributed to preferential horizontal orientation of the transition dipole moments of 3TPA-DiKTa and 3DPA-DiKTa.
dc.relation.ispartofAngewandte Chemie International Editionen
dc.rightsCopyright © 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.en
dc.subjectMulti-resonant thermally activated delayed fluorescenceen
dc.subjectOrganic light-emitting diodesen
dc.subjectHorizontal orientationen
dc.subjectThermally activated delayed fluorescence (TADF)en
dc.subjectQD Chemistryen
dc.titleHighly efficient green and red narrowband emissive organic light-emitting diodes employing multi-resonant thermally activated delayed fluorescence emittersen
dc.typeJournal articleen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.sponsorThe Royal Societyen
dc.contributor.sponsorThe Leverhulme Trusten
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.contributor.institutionUniversity of St Andrews. Institute of Behavioural and Neural Sciencesen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.contributor.institutionUniversity of St Andrews. Centre for Biophotonicsen
dc.contributor.institutionUniversity of St Andrews. Condensed Matter Physicsen
dc.contributor.institutionUniversity of St Andrews. Centre for Energy Ethicsen
dc.description.statusPeer revieweden

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