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Efficient orange organic light-emitting diodes employing a central aniline bridged multiresonant thermally activated delayed fluorescence emitter
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dc.contributor.author | Wu, Sen | |
dc.contributor.author | Hu, Ya-Nan | |
dc.contributor.author | Wang, Jingxiang | |
dc.contributor.author | Sun, Dianming | |
dc.contributor.author | Wang, Kai | |
dc.contributor.author | Zhang, Xiao-Hong | |
dc.contributor.author | Zysman-Colman, Eli | |
dc.date.accessioned | 2024-05-14T11:30:31Z | |
dc.date.available | 2024-05-14T11:30:31Z | |
dc.date.issued | 2024-04-03 | |
dc.identifier | 302085566 | |
dc.identifier | 73b782d6-6da5-4c52-997b-a26c01ee97dd | |
dc.identifier | 85190437058 | |
dc.identifier.citation | Wu , S , Hu , Y-N , Wang , J , Sun , D , Wang , K , Zhang , X-H & Zysman-Colman , E 2024 , ' Efficient orange organic light-emitting diodes employing a central aniline bridged multiresonant thermally activated delayed fluorescence emitter ' , Journal of Materials Chemistry C , vol. 12 , no. 17 , pp. 6177-6184 . https://doi.org/10.1039/D4TC00506F | en |
dc.identifier.issn | 2050-7526 | |
dc.identifier.other | RIS: urn:77A2AF44C801330F29BDB76DCF877905 | |
dc.identifier.other | ORCID: /0000-0001-7183-6022/work/159883431 | |
dc.identifier.uri | https://hdl.handle.net/10023/29880 | |
dc.description | Funding: S. W. and J. X. W. thank the China Scholarship Council (201906250199, 202006250026) for support. Dianming Sun acknowledges support from the Royal Academy of Engineering Enterprise Fellowship (EF2122-13106). E. Z.-C. thanks the Engineering and Physical Sciences Research Council (EP/W015137/1, EP/W007517/1). X.-H. Z. acknowledges support by the National Natural Science Foundation of China (Grant No. 52130304, 51821002) and the Collaborative Innovation Center of Suzhou Nano Science & Technology. | en |
dc.description.abstract | Multiresonant thermally activated delayed fluorescence (MR-TADF) compounds are attractive for use in organic light-emitting diodes as they show narrowband emission, are bright, and can harvest both singlet and triplet excitons for the emission of light. Reflected in the paucity of examples of orange-to-red emitters, developing MR-TADF emitters that emit beyond the green remains an outstanding materials design challenge. In this work, we report one of the first carbonyl-based orange MR-TADF emitters, DDiKTa-A , which is based on the dimerization of the sky-blue emitting DiKTa through a central aniline bridge. DDiKTa-A emits at λPL of 562 nm and has high photoluminescence quantum yield of 92% in 2 wt% doped films in mCP. DDiKTa-A exhibits temperature dependent steady-state photoluminescence in 2-MeTHF, acting as an indirect indicator of the polarity of the medium. The OLEDs with DDiKTa-A showed an EQEmax of 20.3%, but with significant efficiency roll-off (EQE100 of 13.2%). The EQEmax was improved, and the efficiency roll-off mitigated by incorporating an assistant dopant, 4CzIPN, within the emissive layer of the device. The hyperfluorescence device showed an EQEmax of 24.3%, which decreased to 22.5 and 14.6% at 100 and 1000 cd m−2, respectively. | |
dc.format.extent | 8 | |
dc.format.extent | 3193184 | |
dc.language.iso | eng | |
dc.relation.ispartof | Journal of Materials Chemistry C | en |
dc.subject | QD Chemistry | en |
dc.subject | DAS | en |
dc.subject.lcc | QD | en |
dc.title | Efficient orange organic light-emitting diodes employing a central aniline bridged multiresonant thermally activated delayed fluorescence emitter | en |
dc.type | Journal article | en |
dc.contributor.sponsor | EPSRC | en |
dc.contributor.sponsor | UK Research and Innovation | en |
dc.contributor.institution | University of St Andrews. School of Chemistry | en |
dc.contributor.institution | University of St Andrews. Centre for Energy Ethics | en |
dc.contributor.institution | University of St Andrews. Organic Semiconductor Centre | en |
dc.contributor.institution | University of St Andrews. EaSTCHEM | en |
dc.identifier.doi | https://doi.org/10.1039/D4TC00506F | |
dc.description.status | Peer reviewed | en |
dc.identifier.grantnumber | EP/W015137/1 | en |
dc.identifier.grantnumber | EP/W007517/1 | en |
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