Colloidal synthesis and optical properties of type-II CdSe-CdTe and inverted CdTe-CdSe core-wing heteronanoplatelets

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dc.contributor.authorAntanovich, Artsiom
dc.contributor.authorPrudnikau, Anatol
dc.contributor.authorMelnikau, Dimitry
dc.contributor.authorRakovich, Yury P.
dc.contributor.authorChuvilin, Andrey
dc.contributor.authorWoggon, Ulrike
dc.contributor.authorAchtstein, Alexander W.
dc.contributor.authorArtemyev, Mikhail
dc.date.accessioned2017-10-25T06:27:37Z
dc.date.available2017-10-25T06:27:37Z
dc.date.issued2015
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 developed colloidal synthesis to investigate the structural and electronic properties of CdSe-CdTe and inverted CdTe-CdSe heteronanoplatelets and experimentally demonstrate that the overgrowth of cadmium selenide or cadmium telluride core nanoplatelets with counterpartner chalcogenide wings leads to type-II heteronanoplatelets with emission energies defined by the bandgaps of the CdSe and CdTe platelets and the characteristic band offsets. The observed conduction and valence band offsets of 0.36 eV and 0.56 eV are in line with theoretical predictions. The presented type-II heteronanoplatelets exhibit efficient spatially indirect radiative exciton recombination with a quantum yield as high as 23%. While the exciton lifetime is strongly prolonged in the investigated type-II 2D systems with respect to 2D type-I systems, the occurring 2D giant oscillator strength (GOST) effect still leads to a fast and efficient exciton recombination. This makes type-II heteronanoplatelets interesting candidates for low threshold lasing applications and photovoltaics.en
dc.identifier.eissn2040-3372
dc.identifier.issn2040-3364
dc.identifier.pmid25873332
dc.identifier.urihttps://depositonce.tu-berlin.de/handle/11303/6961
dc.identifier.urihttp://dx.doi.org/10.14279/depositonce-6300
dc.language.isoen
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/
dc.subject.ddc600 Technik, Technologiede
dc.titleColloidal synthesis and optical properties of type-II CdSe-CdTe and inverted CdTe-CdSe core-wing heteronanoplateletsen
dc.typeArticleen
dc.type.versionpublishedVersionen
dcterms.bibliographicCitation.doi10.1039/c4nr07134d
dcterms.bibliographicCitation.issue17
dcterms.bibliographicCitation.journaltitleNanoscaleen
dcterms.bibliographicCitation.originalpublishernameRoyal Society of Chemistryde
dcterms.bibliographicCitation.originalpublisherplaceCambridgede
dcterms.bibliographicCitation.pageend8092
dcterms.bibliographicCitation.pagestart8084
dcterms.bibliographicCitation.volume7
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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