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dc.contributor.authorShamsi, Javad
dc.contributor.authorKubicki, Dominik
dc.contributor.authorAnaya, Miguel
dc.contributor.authorLiu, Yun
dc.contributor.authorJi, Kangyu
dc.contributor.authorFrohna, Kyle
dc.contributor.authorGrey, Clare
dc.contributor.authorFriend, Richard
dc.contributor.authorStranks, Samuel
dc.date.accessioned2020-05-18T23:31:11Z
dc.date.available2020-05-18T23:31:11Z
dc.date.issued2020-06-12
dc.identifier.issn2380-8195
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/305558
dc.description.abstractQuantum-confined CsPbBr3 nanoplatelets (NPLs) are extremely promising for use in low-cost blue light-emitting diodes, but their tendency to coalesce in both solution and film form, particularly under operating device conditions with injected charge-carriers, is hindering their adoption. We show that employing a short hexyl-phosphonate ligand (C6H15O3P) in a heat-up colloidal approach for pure, blue-emitting quantum-confined CsPbBr3 NPLs significantly suppresses these coalescence phenomena compared to particles capped with the typical oleyammonium ligands. The phosphonate-passivated NPL thin films exhibit photoluminescence quantum yields of ∼40% at 450 nm with exceptional ambient and thermal stability. The color purity is preserved even under continuous photoexcitation of carriers equivalent to LED current densities of ∼3.5 A/cm2. 13C, 133Cs, and 31P solid-state MAS NMR reveal the presence of phosphonate on the surface. Density functional theory calculations suggest that the enhanced stability is due to the stronger binding affinity of the phosphonate ligand compared to the ammonium ligand.
dc.description.sponsorshipJ. S. and S.D.S. acknowledge the European Research Council (ERC) under the European Union’s Horizon 2020 research and innovation program (HYPERION, grant agreement number 756962). S.D.S acknowledges funding from the Royal Society and Tata Group (UF150033). R.H.F. and Y.L. acknowledge sup-port from the Simons Foundation (grant 601946). M.A. and D.K. acknowledges funding from the European Union’s Hori-zon 2020 research and innovation programme under the Ma-rie Skłodowska-Curie (grant agreement number 841386 and 841136, respectively). K.J. acknowledges funding from the Royal Society (RGFR1180002). K.F. acknowledges a George and Lilian Schiff Studentship, Winton Studentship, the Engineer-ing and Physical Sciences Research Council (EPSRC) student-ship, Cambridge Trust Scholarship, and Robert Gardiner Scholarship. C. P. G. acknowledges the European Research Council (ERC) under the European Union’s Horizon 2020 re-search and innovation program (835073) and the Royal Society for a Research Professorship (RP\R1\180147). The authors acknowledge the EPSRC for funding (EP/R023980/1).
dc.format.mediumPrint-Electronic
dc.languageeng
dc.publisherAmerican Chemical Society (ACS)
dc.rightsAttribution 4.0 International (CC BY)
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/
dc.titleStable Hexylphosphonate-Capped Blue-Emitting Quantum-Confined CsPbBr3 Nanoplatelets.
dc.typeArticle
prism.endingPage1907
prism.issueIdentifier6
prism.publicationDate2020
prism.publicationNameACS Energy Lett
prism.startingPage1900
prism.volume5
dc.identifier.doi10.17863/CAM.52638
dcterms.dateAccepted2020-05-15
rioxxterms.versionofrecord10.1021/acsenergylett.0c00935
rioxxterms.versionVoR
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.licenseref.startdate2020-06
dc.contributor.orcidShamsi, Javad [0000-0003-4684-5407]
dc.contributor.orcidKubicki, Dominik [0000-0002-9231-6779]
dc.contributor.orcidLiu, Yun [0000-0003-1630-4052]
dc.contributor.orcidFrohna, Kyle [0000-0002-2259-6154]
dc.contributor.orcidGrey, Clare [0000-0001-5572-192X]
dc.contributor.orcidFriend, Richard [0000-0001-6565-6308]
dc.contributor.orcidStranks, Samuel [0000-0002-8303-7292]
dc.identifier.eissn2380-8195
rioxxterms.typeJournal Article/Review
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841136)
pubs.funder-project-idRoyal Society (UF150033)
pubs.funder-project-idEuropean Research Council (756962)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/R023980/1)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) Marie Sk?odowska-Curie actions (841386)
pubs.funder-project-idEuropean Commission Horizon 2020 (H2020) ERC (835073)
cam.issuedOnline2020-05-15
cam.orpheus.successTue May 26 08:16:18 BST 2020 - Embargo updated
rioxxterms.freetoread.startdate2100-01-01


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Attribution 4.0 International (CC BY)
Except where otherwise noted, this item's licence is described as Attribution 4.0 International (CC BY)