Study of exciton transfer in dense quantum dot nanocomposites

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage11394en_US
dc.citation.issueNumber19en_US
dc.citation.spage11387en_US
dc.citation.volumeNumber6en_US
dc.contributor.authorGuzelturk, B.en_US
dc.contributor.authorHernandez-Martinez, P. L.en_US
dc.contributor.authorSharma, V. K.en_US
dc.contributor.authorCoskun, Y.en_US
dc.contributor.authorIbrahimova, V.en_US
dc.contributor.authorTuncel, D.en_US
dc.contributor.authorGovorov, A. O.en_US
dc.contributor.authorSun, X. W.en_US
dc.contributor.authorXiong, Q.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2016-02-08T11:02:43Z
dc.date.available2016-02-08T11:02:43Z
dc.date.issued2014en_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Chemistryen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.departmentNanotechnology Research Center (NANOTAM)en_US
dc.description.abstractNanocomposites of colloidal quantum dots (QDs) integrated into conjugated polymers (CPs) are key to hybrid optoelectronics, where engineering the excitonic interactions at the nanoscale is crucial. For such excitonic operation, it was believed that exciton diffusion is essential to realize nonradiative energy transfer from CPs to QDs. In this study, contrary to the previous literature, efficient exciton transfer is demonstrated in the nanocomposites of dense QDs, where exciton transfer can be as efficient as 80% without requiring the assistance of exciton diffusion. This is enabled by uniform dispersion of QDs at high density (up to ∼70 wt%) in the nanocomposite while avoiding phase segregation. Theoretical modeling supports the experimental observation of weakly temperature dependent nonradiative energy transfer dynamics. This new finding provides the ability to design hybrid light-emitting diodes that show an order of magnitude enhanced external quantum efficiencies.en_US
dc.description.provenanceMade available in DSpace on 2016-02-08T11:02:43Z (GMT). No. of bitstreams: 1 bilkent-research-paper.pdf: 70227 bytes, checksum: 26e812c6f5156f83f0e77b261a471b5a (MD5) Previous issue date: 2014en
dc.identifier.doi10.1039/c4nr03456ben_US
dc.identifier.eissn2040-3372
dc.identifier.issn2040-3364
dc.identifier.urihttp://hdl.handle.net/11693/26640
dc.language.isoEnglishen_US
dc.publisherRoyal Society of Chemistryen_US
dc.relation.isversionofhttp://dx.doi.org/10.1039/c4nr03456ben_US
dc.source.titleNanoscaleen_US
dc.subjectExciton transferen_US
dc.titleStudy of exciton transfer in dense quantum dot nanocompositesen_US
dc.typeArticleen_US

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Department of Electrical and Electronics Engineering
Department of Chemistry
Department of Physics
Institute of Materials Science and Nanotechnology (UNAM)
Nanotechnology Research Center (NANOTAM)