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Improving the photoluminescence quantum yields of quantum dot films through a donor/acceptor system for near-IR LEDs

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cam.issuedOnline2018-10-09
datacite.issupplementedby.doi10.17863/CAM.30558.
dc.contributor.authorDavis, Nathaniel
dc.contributor.authorAllardice, JR
dc.contributor.authorXiao, Z
dc.contributor.authorKarani, AH
dc.contributor.authorJellicoe, TC
dc.contributor.authorRao, akshay
dc.contributor.authorGreenham, NC
dc.contributor.orcidAllardice, Jesse [0000-0002-1969-7536]
dc.contributor.orcidXiao, James [0000-0002-1713-5599]
dc.contributor.orcidKarani, Arfa [0000-0002-9038-1593]
dc.contributor.orcidRao, Akshay [0000-0003-0320-2962]
dc.contributor.orcidGreenham, Neil [0000-0002-2155-2432]
dc.date.accessioned2019-01-15T00:30:55Z
dc.date.available2019-01-15T00:30:55Z
dc.date.issued2019
dc.description.abstractNear-infrared light-emitting diodes (LEDs) show potential for telecommunication and medical applications. Quantum dot nanocrystals (QDs), specifically lead chalcogenides, are candidate LED materials since they exhibit tuneable luminescence across the whole near-infrared region, but their surface structure must be carefully controlled to achieve efficient emission. We demonstrate an efficient donor–acceptor QD system by embedding low-energy QDs with high photoluminescence quantum efficiency (PLQE) into a matrix of higher-energy QDs with lower PLQE. We find that the overall PLQE of densely packed cross-linked QD films can be improved by the incorporation of a relatively small fraction of well-passivated acceptor QDs, also leading to improved LED performance. Excitations are transferred into the isolated low-energy acceptor QDs, where they recombine with high radiative efficiency.
dc.description.sponsorshipN. J. L. K. D. acknowledges funding from the Ernest Oppenheimer fund. J. R. A. thanks the Cambridge Commonwealth European and International Trust, and Winton Programme for the Physics of Sustainability for financial support. J. X. thanks the EPSRC CDT in Nanoscience and Nanotechnology (EP/L015978/1). This work was supported by the EPSRC (EP/M005143/1 and EP/M024873/1).
dc.identifier.doi10.17863/CAM.35300
dc.identifier.eissn2051-6355
dc.identifier.issn2051-6347
dc.identifier.urihttps://www.repository.cam.ac.uk/handle/1810/287980
dc.language.isoeng
dc.publisherRoyal Society of Chemistry
dc.publisher.urlhttp://dx.doi.org/10.1039/c8mh01122b
dc.subject40 Engineering
dc.subject3403 Macromolecular and Materials Chemistry
dc.subject4016 Materials Engineering
dc.subject34 Chemical Sciences
dc.subject7 Affordable and Clean Energy
dc.titleImproving the photoluminescence quantum yields of quantum dot films through a donor/acceptor system for near-IR LEDs
dc.typeArticle
dcterms.dateAccepted2018-10-03
prism.endingPage143
prism.issueIdentifier1
prism.publicationNameMaterials Horizons
prism.startingPage137
prism.volume6
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M005143/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L01551X/1)
pubs.funder-project-idEPSRC (1494744)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M006360/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/M024873/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/L015978/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P007767/1)
pubs.funder-project-idEngineering and Physical Sciences Research Council (EP/P027741/1)
rioxxterms.licenseref.startdate2018-10-03
rioxxterms.licenseref.urihttp://www.rioxx.net/licenses/all-rights-reserved
rioxxterms.typeJournal Article/Review
rioxxterms.versionAM
rioxxterms.versionofrecord10.1039/C8MH01122B

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