Ag colloids and arrays for plasmonic non-radiative energy transfer from quantum dots to a quantum well

dc.contributor.authorMurphy, Graham P.
dc.contributor.authorGough, John J.
dc.contributor.authorHiggins, Luke J.
dc.contributor.authorKaranikolas, Vasilios D.
dc.contributor.authorWilson, Keith M.
dc.contributor.authorGarcia Coindreau, Jorge A.
dc.contributor.authorZubialevich, Vitaly Z.
dc.contributor.authorParbrook, Peter J.
dc.contributor.authorBradley, A. Louise
dc.contributor.funderScience Foundation Irelanden
dc.contributor.funderHigher Education Authorityen
dc.contributor.funderIrish Research Councilen
dc.description.abstractNon-radiative energy transfer (NRET) can be an efficient process of benefit to many applications including photovoltaics, sensors, light emitting diodes and photodetectors. Combining the remarkable optical properties of quantum dots (QDs) with the electrical properties of quantum wells (QWs) allows for the formation of hybrid devices which can utilize NRET as a means of transferring absorbed optical energy from the QDs to the QW. Here we report on plasmon-enhanced NRET from semiconductor nanocrystal QDs to a QW. Ag nanoparticles in the form of colloids and ordered arrays are used to demonstrate plasmon-mediated NRET from QDs to QWs with varying top barrier thicknesses. Plasmon-mediated energy transfer. (ET) efficiencies of up to similar to 25% are observed with the Ag colloids. The distance dependence of the plasmon-mediated ET is found to follow the same d-4 dependence as the direct QD to QW ET. There is also evidence for an increase in the characteristic distance of the interaction, thus indicating that it follows a Frster-like model with the Ag nanoparticle-QD acting as an enhanced donor dipole. Ordered Ag nanoparticle arrays display plasmon-mediated ET efficiencies up to similar to 21%. To explore the tunability of the array system, two arrays with different geometries are presented. It is demonstrated that changing the geometry of the array allows a transition from overall quenching of the acceptor QW emission to enhancement, as well as control of the competition between the QD donor quenching and ET rates.en
dc.description.sponsorshipScience Foundation Ireland (10/IN.1/12975); National Access Programme (NAP 338); Higher Education Authority (Programme for Research in Third Level Institutions Cycles 4 and 5 via the INSPIRE and TYFFANI projects); Irish Research Council (RS/2011/287 and GOIPG/2013/680)en
dc.description.statusPeer revieweden
dc.description.versionAccepted Versionen
dc.identifier.citationMurphy, G. P., Gough, J. J., Higgins, L. J., Karanikolas, V. D., Wilson, K. M., Garcia Coindreau, J. A., Zubialevich, V. Z., Parbrook, P. J. and Bradley, A. L. (2017) 'Ag colloids and arrays for plasmonic non-radiative energy transfer from quantum dots to a quantum well', Nanotechnology, 28(11), 115401 (11pp). doi: 10.1088/1361-6528/aa5b67en
dc.publisherIOP Publishingen
dc.relation.projectinfo:eu-repo/grantAgreement/SFI/SFI Stokes Professorship & Lectureship Programme/07/EN/E001A/IE/Peter Parbrook/en
dc.rights© 2017, IOP Publishing Ltd. This is an author-created, un-copyedited version of an article accepted for publication in Nanotechnology. The publisher is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The Version of Record is available online at This Accepted Manuscript will be available for reuse under a CC BY-NC-ND licence after a 12 month embargo period.en
dc.subjectSolar cellsen
dc.subjectSemiconductor nanocrystalsen
dc.subjectQuantum dotsen
dc.subjectQuantum wellsen
dc.subjectNon-radiative energy transferen
dc.subjectSurface plasmonsen
dc.subjectElectron beam lithographyen
dc.titleAg colloids and arrays for plasmonic non-radiative energy transfer from quantum dots to a quantum wellen
dc.typeArticle (peer-reviewed)en
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