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dc.contributor.authorGuo, Haoqingen
dc.contributor.authorPeng, Qimingen
dc.contributor.authorChen, Xian-Kaien
dc.contributor.authorGu, Qinyingen
dc.contributor.authorDong, Shengzhien
dc.contributor.authorEvans, Emrysen
dc.contributor.authorGillett, Alexen
dc.contributor.authorAi, Xinen
dc.contributor.authorZhang, Mingen
dc.contributor.authorCredgington, Danielen
dc.contributor.authorCoropceanu, Veaceslaven
dc.contributor.authorFriend, Richarden
dc.contributor.authorBrédas, Jean-Lucen
dc.contributor.authorLi, Fengen
dc.date.accessioned2019-12-11T00:30:20Z
dc.date.available2019-12-11T00:30:20Z
dc.identifier.issn1476-1122
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/299679
dc.description.abstractWith their unusual electronic structures, organic radical molecules display luminescence properties potentially relevant to lighting applications; yet, their luminescence quantum yield and stability lag behind those of other organic emitters. Here, we designed donor-acceptor neutral radicals based on an electron-poor perchlorotriphenylmethyl or tris(2,4,6-trichlorophenyl)methyl radical moiety combined with different electron-rich groups. Experimental and quantum-chemical studies demonstrate that the molecules do not follow the Aufbau principle: the singly occupied molecular orbital is found to lie below the highest (doubly) occupied molecular orbital. These donor-acceptor radicals have a strong emission yield (up to 54%) and high photostability, with estimated half-lives reaching up to several months under pulsed ultraviolet laser irradiation. Organic light-emitting diodes based on such a radical emitter show deep-red/near-infrared emission with a maximal external quantum efficiency of 5.3%. Our results provide a simple molecular-design strategy for stable, highly luminescent radicals with non-Aufbau electronic structures.
dc.description.sponsorshipIncludes EPSRC.
dc.languageengen
dc.publisherSpringer Nature
dc.rightsAll rights reserved
dc.rights.uri
dc.titleHigh stability and luminescence efficiency in donor-acceptor neutral radicals not following the Aufbau principle.en
dc.typeArticle
prism.endingPage984
prism.publicationNameNature Materialsen
prism.startingPage977
prism.volume18en
dc.identifier.doi10.17863/CAM.46749
dcterms.dateAccepted2019-06-13en
rioxxterms.versionofrecord10.1038/s41563-019-0433-1en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-06-13en
dc.contributor.orcidGillett, Alex [0000-0001-7572-7333]
dc.contributor.orcidCredgington, Daniel [0000-0003-4246-2118]
dc.contributor.orcidFriend, Richard [0000-0001-6565-6308]
dc.identifier.eissn1476-4660
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idEPSRC (1642195)
pubs.funder-project-idEPSRC (1642195)
pubs.funder-project-idEPSRC (EP/M005143/1)
pubs.funder-project-idEPSRC (EP/M01083X/1)
cam.issuedOnline2019-07-22en
cam.orpheus.successThu Jan 30 10:34:08 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2020-01-22


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