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dc.contributor.authorSk, Bahadur
dc.contributor.authorThangaraji, Vasudevan
dc.contributor.authorYadav, Nisha
dc.contributor.authorNanda, Gyana Prakash
dc.contributor.authorDas, Sannibha
dc.contributor.authorGandeepan, Parthasarathy
dc.contributor.authorZysman-Colman, Eli
dc.contributor.authorRajamalli, Pachaiyappan
dc.identifier.citationSk , B , Thangaraji , V , Yadav , N , Nanda , G P , Das , S , Gandeepan , P , Zysman-Colman , E & Rajamalli , P 2021 , ' High performance non-doped green organic light emitting diode via delayed fluorescence ' , Journal of Materials Chemistry C , vol. 2021 , no. 43 , pp. 15583-15590 .
dc.identifier.otherPURE: 276486649
dc.identifier.otherPURE UUID: 8b8faf61-ab4e-4487-801f-51737e0d22cd
dc.identifier.otherORCID: /0000-0001-7183-6022/work/102725738
dc.identifier.otherScopus: 85119828268
dc.identifier.otherWOS: 000711953300001
dc.descriptionFunding: P. G. thanks the Science & Engineering Research Board (SERB), India, for the Start-up Research Grant (SRG) (Grant No: SRG/2020/000161). E.Z-C. thanks the Engineering and Physical Sciences Research Council (EPSRC) EP/P010482/1 and Royal Society Leverhulme Trust Senior Research fellow (SRF\R1\20108 for support. P. R. thanks the Indian Institute of Science (IISc) for generous financial support and the Science & Engineering Research Board (SERB), India, for the SERB-Power Grant (SPG) (Grant No: SPG/2020/000107). B.S. thank IISc for the C. V. Raman Fellowship under the Institute of Eminence (IoE).en
dc.description.abstractNon-doped, delayed fluorescence organic light-emitting diodes (OLEDs) provide a route to high performance devices and simplified device fabrication. Here, two ambipolar anthracene derivatives containing a hole-transporting di-p-tolylamine and a carbazole and an electron-transporting phosphine oxide moiety are rationally designed and synthesized. The thermal and optoelectronic properties were investigated and the neat films of these compounds show high photoluminescence quantum yields of 84–87%. Non-doped OLEDs with these luminogens exhibit green emission at ∼545 nm and an EQEmax of over 7.2% due to the delayed fluorescence resulting from triplet–triplet annihilation (TTA). The devices show a high luminance of over 104 400 cd m−2. Power efficiency and current efficiency maxima are up to 23.0 lm W−1 and 28.3 cd A−1, respectively. Moreover, the devices show very low efficiency roll-off and retain 90% of the maximum efficiency even at 20 000 cd m−2. When combined with a thermally activated delayed fluorescent (TADF) assistant dopant, the green-emitting OLEDs show a high EQEmax of 17.8%.
dc.relation.ispartofJournal of Materials Chemistry Cen
dc.rightsCopyright © 2021 The Author(s). This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the author created accepted manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at
dc.subjectQD Chemistryen
dc.titleHigh performance non-doped green organic light emitting diode via delayed fluorescenceen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.institutionUniversity of St Andrews. Organic Semiconductor Centreen
dc.contributor.institutionUniversity of St Andrews. EaSTCHEMen
dc.contributor.institutionUniversity of St Andrews. School of Chemistryen
dc.description.statusPeer revieweden

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