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Please use this identifier to cite or link to this item: http://hdl.handle.net/1843/49118
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dc.creatorMailde da Silva Ozóriopt_BR
dc.creatorWillian Xerxes Coelho Oliveirapt_BR
dc.creatorJulian Francisco Rama Vieira Silveirapt_BR
dc.creatorAna Flávia Nogueirapt_BR
dc.creatorJuarez Lopes Ferreira da Silvapt_BR
dc.date.accessioned2023-01-24T19:27:50Z-
dc.date.available2023-01-24T19:27:50Z-
dc.date.issued2020-
dc.citation.volume1pt_BR
dc.citation.issue9pt_BR
dc.citation.spage3439pt_BR
dc.citation.epage3448pt_BR
dc.identifier.doihttps://doi.org/10.1039/D0MA00791Apt_BR
dc.identifier.issn2633-5409pt_BR
dc.identifier.urihttp://hdl.handle.net/1843/49118-
dc.description.resumoDespite high photo-conversion efficiency, the short long-term stability and toxicity issues have prevented lead-based perovskites from becoming the standard in high efficiency solar cells. Hence, lead-free perovskites with low inorganic framework dimensionality have attracted great attention because of their optoelectronic properties and superior stability. In this work, we present a combined experimental and theoretical investigation of the structural and optoelectronic properties of three novel highly stable zero-dimensional perovskites (discrete connectivity of the inorganic framework), where fused octahedra [BixIy]z− are interspersed by large organic cations: H2bpy²+ for 1, Hdmphen+ for 2 and the combination of H2terpy+² and Hterpy+ for 3 (bpy = 4,4-bipyridine, dmphen = 2,9-dimethyl-1,10-phenanthroline, terpy = 2,2′;6′,2′′-terpyridine). In each of these compounds, the inorganic moieties display different morphologies, either edge-sharing bi-octahedra (Bi2I10 4−, 1), face-sharing bi-octahedra (Bi2I9³−, 2) or isolated octahedra (BiI6³−, 3). The consistent results of experimental and theoretical characterization reveal that distortions in the coordination octahedra are most prominent as the number of shared iodide species increases. The experimental optical response presents similar trends between all three materials, which is dominated by transitions inside the octahedron, while the transitions between cations and anionic bismuth-iodide clusters displayed very low intensity at a lower photon energy, an aspect that was described qualitatively well by theoretical characterization. Overall, these materials show different potential prospects, such as application in hybrid dimensional materials, acting as dielectrics for instance, or as a source of Bi for the synthesis of other lead-free perovskites.pt_BR
dc.description.sponsorshipCNPq - Conselho Nacional de Desenvolvimento Científico e Tecnológicopt_BR
dc.languageengpt_BR
dc.publisherUniversidade Federal de Minas Geraispt_BR
dc.publisher.countryBrasilpt_BR
dc.publisher.departmentICX - DEPARTAMENTO DE QUÍMICApt_BR
dc.publisher.initialsUFMGpt_BR
dc.relation.ispartofMaterials advancespt_BR
dc.rightsAcesso Abertopt_BR
dc.subjectPerovskitespt_BR
dc.subjectOptoelectronic characterizationpt_BR
dc.subjectSolar cellspt_BR
dc.subjectLead-freept_BR
dc.subjectBismuthpt_BR
dc.subject.otherQuímica inorgânicapt_BR
dc.subject.otherCélulas solarespt_BR
dc.subject.otherBismutopt_BR
dc.subject.otherMinerais rarospt_BR
dc.subject.otherOptoeletrônicapt_BR
dc.titleNovel zero-dimensional lead-free bismuth based perovskites: from synthesis to structural and optoelectronic characterizationpt_BR
dc.typeArtigo de Periódicopt_BR
dc.url.externahttps://pubs.rsc.org/en/content/articlelanding/2020/MA/D0MA00791Apt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-3966-8908pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0722-5352pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0002-0838-7962pt_BR
dc.identifier.orcidhttps://orcid.org/0000-0003-0645-8760pt_BR
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