Platelet-in-Box Colloidal Quantum Wells: CdSe/CdS@CdS Core/Crown@Shell Heteronanoplatelets

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dc.authorid0000-0003-1616-2728en_US
dc.authorid0000-0002-4628-0197en_US
dc.authorid0000-0003-2212-965Xen_US
dc.authorid0000-0002-6250-6977
dc.authorid0000-0003-1977-6485
dc.contributor.authorKeleştemur, Yusuf
dc.contributor.authorGüzeltürk, Burak
dc.contributor.authorErdem, Onur
dc.contributor.authorOlutaş, Murat
dc.contributor.authorGüngör, Kıvanç
dc.date.accessioned2021-06-23T19:43:26Z
dc.date.available2021-06-23T19:43:26Z
dc.date.issued2016
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractHere, the CdSe/CdS@CdS core/crown@shell heterostructured nanoplatelets (NPLs) resembling a platelet-in-box structure are developed and successfully synthesized. It is found that the core/crown@shell NPLs exhibit consistently substantially improved photoluminescence quantum yield compared to the core@shell NPLs regardless of their CdSe-core size, CdS-crown size, and CdS-shell thickness. This enhancement in quantum yield is attributed to the passivation of trap sites resulting from the critical peripheral growth with laterally extending CdS-crown layer before the vertical shell growth. This is also verified with the disappearance of the fast nonradiative decay component in the core/crown NPLs from the time-resolved fluorescence spectroscopy. When compared to the core@shell NPLs, the core/crown@shell NPLs exhibit relatively symmetric emission behavior, accompanied with suppressed lifetime broadening at cryogenic temperatures, further suggesting the suppression of trap sites. Moreover, constructing both the CdS-crown and CdS-shell regions, significantly enhanced absorption cross-section is achieved. This, together with the suppressed Auger recombination, enables the achievement of the lowest threshold amplified spontaneous emission (approximate to 20 mu J cm(-2)) from the core/crown@shell NPLs among all different architectures of NPLs. These findings indicate that carefully heterostructured NPLs will play a critical role in building high-performance colloidal optoelectronic devices, which may even possibly challenge their traditional epitaxially grown thin-film based counterparts.en_US
dc.identifier.doi10.1002/adfm.201600588
dc.identifier.endpage3579en_US
dc.identifier.issn1616-301X
dc.identifier.issn1616-3028
dc.identifier.issue21en_US
dc.identifier.scopus2-s2.0-84963815786en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage3570en_US
dc.identifier.urihttps://doi.org/10.1002/adfm.201600588
dc.identifier.urihttps://hdl.handle.net/20.500.12491/8775
dc.identifier.volume26en_US
dc.identifier.wosWOS:000377597400002en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOlutaş, Murat
dc.language.isoenen_US
dc.publisherWiley-V C H Verlag Gmbhen_US
dc.relation.ispartofAdvanced Functional Materialsen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCdSe/CdS@CdS Core
dc.subjectNPLs
dc.subjectCdS-Crown Size
dc.subjectAuger Recombination
dc.titlePlatelet-in-Box Colloidal Quantum Wells: CdSe/CdS@CdS Core/Crown@Shell Heteronanoplateletsen_US
dc.typeArticleen_US

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