Onion-Like (CdSe)ZnS/CdSe/ZnS quantum-dot-quantum-well heteronanocrystals for investigation of multi-color emission

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buir.contributor.authorDemir, Hilmi Volkan
buir.contributor.orcidDemir, Hilmi Volkan|0000-0003-1793-112X
dc.citation.epage3526en_US
dc.citation.issueNumber6en_US
dc.citation.spage3515en_US
dc.citation.volumeNumber16en_US
dc.contributor.authorNizamoglu, S.en_US
dc.contributor.authorDemir, Hilmi Volkanen_US
dc.date.accessioned2015-07-28T11:58:17Z
dc.date.available2015-07-28T11:58:17Z
dc.date.issued2008en_US
dc.departmentDepartment of Physicsen_US
dc.departmentDepartment of Electrical and Electronics Engineeringen_US
dc.departmentInstitute of Materials Science and Nanotechnology (UNAM)en_US
dc.description.abstractWe investigate multi-color spontaneous emission from quantum-dot-quantum-well heteronanocrystals made of onion-like (CdSe) ZnS/CdSe/ZnS ( core) shell/shell/shell structures, with our theoretical results explaining experimental measurements for the first time. In such multi-layered heteronanocrystals, we discover that the carrier localization is tuned from type-1-like to type-2-like localization by controlling CdSe and ZnS shell thicknesses, and that 3-monolayer ZnS barriers are not necessarily sufficient for carrier localization, unlike in conventional ( CdSe) ZnS ( core) shell structures. We demonstrate that exciton localization in distinct layers of ( CdSe) ZnS/CdSe/ZnS heteronanocrystals with high transition probability ( for n=1 states in CdSe core and n=2 states in CdSe shell) is key to their multi-color emission. (c) 2008 Optical Society of America.en_US
dc.identifier.doi10.1364/OE.16.003515en_US
dc.identifier.issn1094-4087
dc.identifier.urihttp://hdl.handle.net/11693/11660
dc.language.isoEnglishen_US
dc.publisherOptical Society of Americaen_US
dc.relation.isversionofhttp://dx.doi.org/10.1364/OE.16.003515en_US
dc.source.titleOptics Expressen_US
dc.subjectWhite-light Generationen_US
dc.subjectInverted Core/shell Nanocrystalsen_US
dc.subjectSemiconductor Nanocrystalsen_US
dc.subjectSystemsen_US
dc.subjectZnseen_US
dc.titleOnion-Like (CdSe)ZnS/CdSe/ZnS quantum-dot-quantum-well heteronanocrystals for investigation of multi-color emissionen_US
dc.typeArticleen_US

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