Effect of a buffer layer between the shell and ligand on the optical properties of an exciton and biexciton in type-II quantum dot nanocrystals

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dc.contributor.authorKoc, Fatih
dc.contributor.authorKoksal, Koray
dc.contributor.authorSahin, Mehmet
dc.date.accessioned2020-03-26T19:35:02Z
dc.date.available2020-03-26T19:35:02Z
dc.date.issued2017
dc.departmentSelçuk Üniversitesien_US
dc.description.abstractIn this study, we have investigated the effect of the buffer layers on the electronic and optical properties of an exciton (X) and a biexciton (XX) in a type-II CdTe/CdSe quantum dot nanocrystal. In an experimental study, it has been reported that when a CdTe/CdSe quantum dot nanocrystal is coated by a ZnTe material as a buffer layer, the photoluminescence quantum yield is growing from 4 to 20%. We have confirmed theoretically this improvement and extended the calculations to an XX structure. In the calculations, two different semiconductor materials, CdS and ZnTe, have been considered for the buffer layer. We have theoretically shown that the buffer layer causes an increase in the radiative oscillator strength of both X and XX. When the ZnTe is used as the buffer layer, the oscillator strength becomes stronger when compared to CdSe buffer material because of higher conduction band offset between CdSe and ZnTe.en_US
dc.description.sponsorshipTUBITAK TBAGTurkiye Bilimsel ve Teknolojik Arastirma Kurumu (TUBITAK) [109T729]en_US
dc.description.sponsorshipThis work was supported by the TUBITAK TBAG [project number 109T729].en_US
dc.identifier.doi10.1080/14786435.2016.1252861en_US
dc.identifier.endpage211en_US
dc.identifier.issn1478-6435en_US
dc.identifier.issn1478-6443en_US
dc.identifier.issue3en_US
dc.identifier.scopusqualityQ3en_US
dc.identifier.startpage201en_US
dc.identifier.urihttps://dx.doi.org/10.1080/14786435.2016.1252861
dc.identifier.urihttps://hdl.handle.net/20.500.12395/34992
dc.identifier.volume97en_US
dc.identifier.wosWOS:000393815100005en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherTAYLOR & FRANCIS LTDen_US
dc.relation.ispartofPHILOSOPHICAL MAGAZINEen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.selcuk20240510_oaigen_US
dc.subjectQuantum doten_US
dc.subjecttype-II nanocrystalsen_US
dc.subjectmulti-exciton in nanocrystalsen_US
dc.titleEffect of a buffer layer between the shell and ligand on the optical properties of an exciton and biexciton in type-II quantum dot nanocrystalsen_US
dc.typeArticleen_US

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