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dc.contributor.authorHoye, Roberten
dc.contributor.authorLai, May-Lingen
dc.contributor.authorAnaya, Miguelen
dc.contributor.authorTong, Yuen
dc.contributor.authorGałkowski, Krzysztofen
dc.contributor.authorDoherty, Tiarnanen
dc.contributor.authorLi, Weiweien
dc.contributor.authorHuq, Tahmidaen
dc.contributor.authorMackowski, Sebastianen
dc.contributor.authorPolavarapu, Lakshminarayanaen
dc.contributor.authorFeldmann, Jochenen
dc.contributor.authorMacManus-Driscoll, Judith Len
dc.contributor.authorFriend, Richarden
dc.contributor.authorUrban, Alexander Sen
dc.contributor.authorStranks, Samuelen
dc.date.accessioned2019-05-02T23:30:52Z
dc.date.available2019-05-02T23:30:52Z
dc.date.issued2019-05en
dc.identifier.issn2380-8195
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/292261
dc.description.abstractPerovskite nanoplatelets (NPls) hold promise for light-emitting applications, having achieved photoluminescence quantum efficiencies approaching unity in the blue wavelength range, where other metal-halide perovskites have typically been ineffective. However, the external quantum efficiencies (EQEs) of blue-emitting NPl light-emitting diodes (LEDs) have only reached 0.12%. In this work, we show that NPl LEDs are primarily limited by a poor electronic interface between the emitter and hole-injector. We show that the NPls have remarkably deep ionization potentials (≥6.5 eV), leading to large barriers for hole injection, as well as substantial non-radiative decay at the NPl/hole-injector interface. We find that an effective way to reduce these non-radiative losses is by using poly(triarylamine) interlayers. Using these, we increase the EQE of our blue LEDs emitting at 464 nm wavelength to 0.3%, as well as increase the EQE of our sky-blue-emitting LEDs to 0.55%. Our work also identifies the key challenges for further efficiency increases.
dc.format.mediumPrint-Electronicen
dc.languageengen
dc.publisherAmerican Chemical Society (ACS)
dc.rightsAll rights reserved
dc.rights.uri
dc.titleIdentifying and Reducing Interfacial Losses to Enhance Color-Pure Electroluminescence in Blue-Emitting Perovskite Nanoplatelet Light-Emitting Diodes.en
dc.typeArticle
prism.endingPage1188
prism.issueIdentifier5en
prism.publicationDate2019en
prism.publicationNameACS energy lettersen
prism.startingPage1181
prism.volume4en
dc.identifier.doi10.17863/CAM.39410
dcterms.dateAccepted2019-04-17en
rioxxterms.versionofrecord10.1021/acsenergylett.9b00571en
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserveden
rioxxterms.licenseref.startdate2019-05en
dc.contributor.orcidHoye, Robert [0000-0002-7675-0065]
dc.contributor.orcidAnaya, Miguel [0000-0002-0384-5338]
dc.contributor.orcidTong, Yu [0000-0002-8828-0718]
dc.contributor.orcidGałkowski, Krzysztof [0000-0002-9275-1519]
dc.contributor.orcidLi, Weiwei [0000-0001-5781-5401]
dc.contributor.orcidHuq, Tahmida [0000-0002-3581-2151]
dc.contributor.orcidPolavarapu, Lakshminarayana [0000-0002-9040-5719]
dc.contributor.orcidFriend, Richard [0000-0001-6565-6308]
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.identifier.eissn2380-8195
rioxxterms.typeJournal Article/Reviewen
pubs.funder-project-idRoyal Academy of Engineering (RAEng) (RF\201718\17101)
pubs.funder-project-idEPSRC (EP/M005143/1)
pubs.funder-project-idEPSRC (EP/L016087/1)
pubs.funder-project-idEPSRC (EP/N004272/1)
pubs.funder-project-idEPSRC (EP/L011700/1)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (756962)
pubs.funder-project-idEPSRC (1647980)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
cam.orpheus.successThu Jan 30 10:47:05 GMT 2020 - Embargo updated*
rioxxterms.freetoread.startdate2020-05-31


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