CdSe/CdSe1-xTex core/crown heteronanoplatelets: tuning the excitonic properties without changing the thickness

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dc.authorid0000-0003-3905-376Xen_US
dc.authorid0000-0003-1616-2728en_US
dc.authorid0000-0003-2212-965Xen_US
dc.authorid0000-0003-1977-6485
dc.authorid0000-0002-6250-6977
dc.contributor.authorKeleştemur, Yusuf
dc.contributor.authorGüzeltürk, Burak
dc.contributor.authorErdem, Onur
dc.contributor.authorOlutaş, Murat
dc.contributor.authorErdem, Talha
dc.date.accessioned2021-06-23T19:48:57Z
dc.date.available2021-06-23T19:48:57Z
dc.date.issued2017
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractHere we designed and synthesized CdSe/CdSe1-xTex core/crown nanoplatelets (NPLs) with controlled crown compositions by using the core-seeded-growth approach. We confirmed the uniform growth of the crown regions with well-defined shape and compositions by employing transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. By precisely tuning the composition of the CdSe1-xTex crown region from pure CdTe (x = 1.00) to almost pure CdSe doped with several Te atoms (x = 0.02), we achieved tunable excitonic properties without changing the thickness of the NPLs and demonstrated the evolution of type-II electronic structure. Upon increasing the Te concentration in the crown region, we obtained continuously tunable photoluminescence peaks within the range of similar to 570 nm (for CdSe1-xTex crown with x = 0.02) and similar to 660 nm (for CdSe1-xTex crown with x = 1.00). Furthermore, with the formation of the CdSe1-xTex crown region, we observed substantially improved photoluminescence quantum yields (up to similar to 95%) owing to the suppression of nonradiative hole trap sites. Also, we found significantly increased fluorescence lifetimes from similar to 49 up to similar to 326 ns with increasing Te content in the crown, suggesting the transition from quasi-type-II to type-II electronic structure. With their tunable excitonic properties, this novel material presented here will find ubiquitous use in various efficient light-emitting and-harvesting applications.en_US
dc.identifier.doi10.1021/acs.jpcc.6b11809
dc.identifier.endpage4658en_US
dc.identifier.issn1932-7447
dc.identifier.issue8en_US
dc.identifier.scopus2-s2.0-85027246116en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.startpage4650en_US
dc.identifier.urihttps://doi.org/10.1021/acs.jpcc.6b11809
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9278
dc.identifier.volume121en_US
dc.identifier.wosWOS:000395616200059en_US
dc.identifier.wosqualityQ1en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.institutionauthorOlutaş, Murat
dc.language.isoenen_US
dc.publisherAmer Chemical Socen_US
dc.relation.ispartofJournal Of Physical Chemistry Cen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCdSe/CdSe1−xTexen_US
dc.subjectTransmission Electron Microscopy
dc.subjectCrown Region
dc.subjectHeteronanoplatelets
dc.titleCdSe/CdSe1-xTex core/crown heteronanoplatelets: tuning the excitonic properties without changing the thicknessen_US
dc.typeArticleen_US

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