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dc.contributor.authorGounko, Iourien
dc.contributor.authorBradley, Louiseen
dc.date.accessioned2011-01-17T16:53:19Z
dc.date.available2011-01-17T16:53:19Z
dc.date.created27 June-1 July 2010en
dc.date.issued2010en
dc.date.submitted2010en
dc.identifier.citationManuela Lunz, Louise Bradley, Wei-Yu Chen, V.A. Gerard, S.J. Byrne, Yuri Gun'ko, V. Lesynak, N. Gaponik, Influence of intra-ensemble energy transfer on the properties of nanocrystal quantum dot structures and devices, 12th International Conference on Transparent Optical Networks (ICTON), 2010, Munich, 27 June-1 July 2010, 2010, 1-4en
dc.identifier.otherYen
dc.identifier.urihttp://hdl.handle.net/2262/49304
dc.descriptionPUBLISHEDen
dc.descriptionMunichen
dc.description.abstractThe impact of intra-ensemble Forster resonant energy transfer (FRET) on the optical properties of monodispersed quantum dot (QD) monolayers and a donor/acceptor FRET bilayer structure are presented. The QD structures are characterized by steady-state absorption and photoluminescence (PL) spectroscopy as well as time-resolved PL measurements. The optical properties of the monodispersed monolayers, such as peak emission wavelength and PL decays, are strongly influenced by FRET from smaller to larger QDs within the ensemble. Comparing several QD samples, the spectral overlap of the QD ensemble and the QD concentration were identified as parameters that allow for tuning of FRET in monodispersed QD structures. For the donor/acceptor QD bilayer structure an unexpected decrease of the FRET efficiency between donor and acceptor layers is observed with increasing donor QD concentration. The concentration-dependent donor lifetime and a constant donor-acceptor FRET rate can explain this decrease within the FRET rate model. Even though the donor-acceptor FRET rate is donor-concentration independent - as expected from theory - its competition with donor-donor energy transfer leads to a concentration dependence of the FRET efficiency from donors to acceptors. This shows that intra-ensemble FRET can have an important impact on device performance.en
dc.description.sponsorshipThis work was financially supported by Science Foundation Ireland 05/PICA/1797.en
dc.format.extent1-4en
dc.language.isoenen
dc.rightsYen
dc.subjectOpticsen
dc.subjectmonolayersen
dc.subjectnanostructured materialsen
dc.titleInfluence of intra-ensemble energy transfer on the properties of nanocrystal quantum dot structures and devicesen
dc.title.alternative12th International Conference on Transparent Optical Networks (ICTON), 2010en
dc.typeConference Paperen
dc.contributor.sponsorScience Foundation Ireland (SFI)en
dc.type.supercollectionscholarly_publicationsen
dc.type.supercollectionrefereed_publicationsen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/bradlelen
dc.identifier.peoplefinderurlhttp://people.tcd.ie/igounkoen
dc.identifier.rssinternalid70468en
dc.identifier.doihttp://dx.doi.org/10.1109/ICTON.2010.5549154en
dc.subject.TCDThemeNanoscience & Materialsen
dc.identifier.rssurihttp://dx.doi.org/10.1109/ICTON.2010.5549154en
dc.identifier.orcid_id0000-0002-9399-8628en


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