Temperature dependent radiative and non-radiative recombination dynamics in CdSe-CdTe and CdTe-CdSe type II hetero nanoplatelets

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dc.contributor.authorScott, Riccardo
dc.contributor.authorKickhöfel, Sebastian
dc.contributor.authorSchöps, Oliver
dc.contributor.authorAntanovich, Artsiom
dc.contributor.authorPrudnikau, Anatol
dc.contributor.authorChuvilin, Andrey
dc.contributor.authorWoggon, Ulrike
dc.contributor.authorArtemyev, Mikhail
dc.contributor.authorAchtstein, Alexander W.
dc.date.accessioned2017-10-24T06:17:22Z
dc.date.available2017-10-24T06:17:22Z
dc.date.issued2016
dc.descriptionDieser Beitrag ist mit Zustimmung des Rechteinhabers aufgrund einer (DFG geförderten) Allianz- bzw. Nationallizenz frei zugänglich.de
dc.descriptionThis publication is with permission of the rights owner freely accessible due to an Alliance licence and a national licence (funded by the DFG, German Research Foundation) respectively.en
dc.description.abstractWe investigate the temperature-dependent decay kinetics of type II CdSe-CdTe and CdTe-CdSe core-lateral shell nanoplatelets. From a kinetic analysis of the photoluminescence (PL) decay and a measurement of the temperature dependent quantum yield we deduce the temperature dependence of the non-radiative and radiative lifetimes of hetero nanoplates. In line with the predictions of the giant oscillator strength effect in 2D we observe a strong increase of the radiative lifetime with temperature. This is attributed to an increase of the homogeneous transition linewidth with temperature. Comparing core only and hetero platelets we observe a significant prolongation of the radiative lifetime in type II platelets by two orders in magnitude while the quantum yield is barely affected. In a careful analysis of the PL decay transients we compare different recombination models, including electron hole pairs and exciton decay, being relevant for the applicability of those structures in photonic applications like solar cells or lasers. We conclude that the observed biexponential PL decay behavior in hetero platelets is predominately due to spatially indirect excitons being present at the hetero junction and not ionized e-h pair recombination.en
dc.identifier.eissn1463-9084
dc.identifier.issn1463-9076
dc.identifier.pmid26743562
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/6884
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6223
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc540 Chemie und zugeordnete Wissenschaftende
dc.titleTemperature dependent radiative and non-radiative recombination dynamics in CdSe-CdTe and CdTe-CdSe type II hetero nanoplateletsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c5cp06623a
dcterms.bibliographicCitation.issue4
dcterms.bibliographicCitation.journaltitlePhysical chemistry, chemical physicsen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend3203
dcterms.bibliographicCitation.pagestart3197
dcterms.bibliographicCitation.volume18
tub.accessrights.dnbdomain
tub.affiliationFak. 2 Mathematik und Naturwissenschaften::Inst. Optik und Atomare Physik::FG Nichtlineare Optikde
tub.affiliation.facultyFak. 2 Mathematik und Naturwissenschaftende
tub.affiliation.groupFG Nichtlineare Optikde
tub.affiliation.instituteInst. Optik und Atomare Physikde
tub.publisher.universityorinstitutionTechnische Universität Berlin

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