Cd-free Cu-doped ZnInS/ZnS core/shell nanocrystals: controlled synthesis and photophysical properties

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dc.authorid0000-0002-6463-4825en_US
dc.authorid0000-0003-2212-965Xen_US
dc.authorid0000-0002-6250-6977
dc.contributor.authorKaur, Manpreet
dc.contributor.authorSharma, Ashma
dc.contributor.authorOlutaş, Murat
dc.contributor.authorErdem, Onur
dc.contributor.authorKumar, Akshay
dc.date.accessioned2021-06-23T19:49:40Z
dc.date.available2021-06-23T19:49:40Z
dc.date.issued2018
dc.departmentBAİBÜ, Fen Edebiyat Fakültesi, Fizik Bölümüen_US
dc.description.abstractHere, we report efficient composition-tunable Cu-doped ZnInS/ZnS (core and core/shell) colloidal nanocrystals (CNCs) synthesized by using a colloidal non-injection method. The initial precursors for the synthesis were used in oleate form rather than in powder form, resulting in a nearly defect-free photoluminescence (PL) emission. The change in Zn/In ratio tunes the percentage incorporation of Cu in CNCs. These highly monodisperse Cu-doped ZnInS CNCs having variable Zn/In ratios possess peak emission wavelength tunable from 550 to 650 nm in the visible spectrum. The quantum yield (QY) of these synthesized Cd-free CNCs increases from 6.0 to 65.0% after coating with a ZnS shell. The CNCs possessing emission from a mixed contribution of deep trap and dopant states to only dominant dopant-related Stokesshifted emission are realized by a careful control of stoichiometric ratio of different reactant precursors during synthesis. The origin of this shift in emission was understood by using steady state and time-resolved fluorescence (TRF) spectroscopy studies. As a proof-of-concept demonstration, these blue excitable Cu-doped ZnInS/ZnS CNCs have been integrated with commercial blue LEDs to generate white-light emission (WLE). The suitable combination of these highly efficient doped CNCs results led to a Commission Internationale de l'Enclairage (CIE) color coordinates of (0.33, 0.31) at a color coordinate temperature (CCT) of 3694 K, with a luminous efficacy of optical radiation (LER) of 170 lm/W-opt and a color rendering index (CRI) of 88.en_US
dc.identifier.doi10.1186/s11671-018-2599-x
dc.identifier.issn1556-276X
dc.identifier.pmid29916083en_US
dc.identifier.scopus2-s2.0-85048734297en_US
dc.identifier.scopusqualityQ1en_US
dc.identifier.urihttps://doi.org/10.1186/s11671-018-2599-x
dc.identifier.urihttps://hdl.handle.net/20.500.12491/9580
dc.identifier.volume13en_US
dc.identifier.wosWOS:000436022800001en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.indekslendigikaynakPubMeden_US
dc.institutionauthorOlutaş, Murat
dc.language.isoenen_US
dc.publisherSpringeren_US
dc.relation.ispartofNanoscale Research Lettersen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/openAccessen_US
dc.subjectCadmium Freeen_US
dc.subjectColloidal Quantum Dotsen_US
dc.subjectQuantum Yielden_US
dc.subjectCu Dopingen_US
dc.subjectWhite-Light Emissionen_US
dc.subjectColor Propertiesen_US
dc.titleCd-free Cu-doped ZnInS/ZnS core/shell nanocrystals: controlled synthesis and photophysical propertiesen_US
dc.typeArticleen_US

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