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dc.contributor.authorHoye, Robert
dc.contributor.authorLai, May-Ling
dc.contributor.authorAnaya, Miguel
dc.contributor.authorTong, Yu
dc.contributor.authorGałkowski, Krzysztof
dc.contributor.authorDoherty, Tiarnan
dc.contributor.authorLi, Weiwei
dc.contributor.authorHuq, Tahmida
dc.contributor.authorMackowski, Sebastian
dc.contributor.authorPolavarapu, Lakshminarayana
dc.contributor.authorFeldmann, Jochen
dc.contributor.authorMacManus-Driscoll, Judith L
dc.contributor.authorFriend, Richard
dc.contributor.authorUrban, Alexander S
dc.contributor.authorStranks, Samuel
dc.date.accessioned2019-05-02T23:30:52Z
dc.date.available2019-05-02T23:30:52Z
dc.date.issued2019-05-10
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 reached only 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 nonradiative decay at the NPl/hole-injector interface. We find that an effective way to reduce these nonradiative losses is by using poly(triarylamine) interlayers, which lead to an increase in the  EQE of the blue (464 nm emission wavelength) and sky-blue (489 nm emission wavelength) LEDs to 0.3% and 0.55%, respectively. Our work also identifies the key challenges for further efficiency increases.
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherAmerican Chemical Society (ACS)
dc.rightsAll rights reserved
dc.titleIdentifying and Reducing Interfacial Losses to Enhance Color-Pure Electroluminescence in Blue-Emitting Perovskite Nanoplatelet Light-Emitting Diodes.
dc.typeArticle
prism.endingPage1188
prism.issueIdentifier5
prism.publicationDate2019
prism.publicationNameACS Energy Lett
prism.startingPage1181
prism.volume4
dc.identifier.doi10.17863/CAM.39410
dcterms.dateAccepted2019-04-17
rioxxterms.versionofrecord10.1021/acsenergylett.9b00571
rioxxterms.versionAM
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2019-05
dc.contributor.orcidHoye, Robert [0000-0002-7675-0065]
dc.contributor.orcidLi, Weiwei [0000-0001-5781-5401]
dc.contributor.orcidFriend, Richard [0000-0001-6565-6308]
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.identifier.eissn2380-8195
dc.publisher.urlhttp://dx.doi.org/10.1021/acsenergylett.9b00571
rioxxterms.typeJournal Article/Review
pubs.funder-project-idRoyal Academy of Engineering (RAEng) (RF\201718\17101)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M005143/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L016087/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/N004272/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L011700/1)
pubs.funder-project-idEuropean Research Council (756962)
pubs.funder-project-idEPSRC (1647980)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
cam.issuedOnline2019-04-17
cam.orpheus.successThu Jan 30 10:47:05 GMT 2020 - Embargo updated
rioxxterms.freetoread.startdate2020-05-31


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