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dc.contributor.authorSaha, Avijit
dc.contributor.authorFigueroba, Alberto
dc.contributor.authorKonstantatos, Gerasimos
dc.date.accessioned2020-03-30T09:49:41Z
dc.date.available2020-03-30T09:49:41Z
dc.date.issued2020
dc.identifier.citationSaha, A.; Figueroba, A.; Konstantatos, G. Ag2ZnSnS4 Nanocrystals Expand the Availability of RoHS Compliant Colloidal Quantum Dots. "Chemistry of Materials", 2020, vol. 32, núm. 5, p. 2148-2155.
dc.identifier.urihttp://hdl.handle.net/2117/182207
dc.description.abstractThe demonstration of the quantum confinement effect in colloidal quantum dots (QDs) has been extensively studied and exploited mainly in Pb and Cd chalcogenide systems. There has been an urgent need recently for the development of non(less)-toxic colloidal QDs to warrant compliance with current safety regulations (Restriction of Hazardous Substances (RoHS) Directive 2002/95/EC). Herein, we report Pb/Cd-free, solution processed luminescent Ag2ZnSnS4 (AZTS) colloidal QDs. We present a selective and controlled amine and thiol-free synthesis of air stable luminescent AZTS QDs by the hot injection technique. By controlling the reaction conditions we obtain controlled size variation and demonstrate the quantum confinement effect that is in good agreement with the theoretically calculated values. The band gap of the AZTS QDs is size-tunable in the near-infrared from 740 to 850 nm. Finally, we passivate the surface with Zn-oleate, which yields higher quantum yield (QY), longer lifetime, and better colloidal stability.
dc.format.extent8 p.
dc.language.isoeng
dc.publisherACS
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshCrystals
dc.subject.otherquantum dots
dc.titleAg2ZnSnS4 Nanocrystals Expand the Availability of RoHS Compliant Colloidal Quantum Dots
dc.typeArticle
dc.subject.lemacCristalls
dc.identifier.doi10.1021/acs.chemmater.9b05370
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://pubs.acs.org/doi/abs/10.1021/acs.chemmater.9b05370
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/725165/EU/Hierarchically Engineered Inorganic Nanomaterials from the atomic to supra-nanocrystalline level as a novel platform for SOLution Processed SOLar cells/HEINSOL
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO//SEV-2015-0522/ES/AGR-INSTITUTO DE CIENCIAS FOTONICAS/
local.citation.publicationNameChemistry of Materials
local.citation.volume32
local.citation.number5
local.citation.startingPage2148
local.citation.endingPage2155


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