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dc.contributor.authorBurgués-Ceballos, Ignasi
dc.contributor.authorWang, Yongjie
dc.contributor.authorKonstantatos, Gerasimos
dc.date.accessioned2022-03-08T13:49:37Z
dc.date.available2022-03-08T13:49:37Z
dc.date.issued2022-03-03
dc.identifier.citationBurgués-Ceballos, I.; Wang, Y.; Konstantatos, G. Mixed AgBiS2 nanocrystals for photovoltaics and photodetectors. "Nanoscale", 3 Març 2022,
dc.identifier.urihttp://hdl.handle.net/2117/363570
dc.description.abstractHeavy-metal-free colloidal nanocrystals are gaining due attention as low-cost, semiconducting materials for solution-processed optoelectronic applications. One common limitation of such materials is their limited carrier transport and trap-assisted recombination, which impede the performance of thick photoactive layers. Here we mix small-size and large-size AgBiS2 nanocrystals to judiciously favour the band alignment in photovoltaic and photodetector devices. The absorbing layer of these devices is fabricated in a gradient fashion in order to maximise charge transfer and transport. We implement this strategy to fabricate mixed AgBiS2 thin film solar cells with a power conversion of 7.3%, which significantly surpasses the performance of previously reported devices based on single-batch AgBiS2 nanocrystals. Additionally, this approach allows us to fabricate devices using thicker photoactive layers that show lower dark currents and external quantum efficiencies exceeding 40% over a broad bandwidth – covering the visible and near infrared range beyond 1 μm, thus unleashing the potential of colloidal AgBiS2 nanocrystals in photodetector applications.
dc.format.extent7 p.
dc.language.isocat
dc.publisherRoyal Society of Chemistry
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.lcshNanocrystals
dc.subject.othernanocrystals
dc.titleMixed AgBiS2 nanocrystals for photovoltaics and photodetectors
dc.typeArticle
dc.subject.lemacNanocristalls
dc.identifier.doi10.1039/D2NR00589A
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://pubs.rsc.org/en/Content/ArticleLanding/2022/NR/D2NR00589A
dc.rights.accessOpen Access
dc.description.versionPostprint (published version)
dc.relation.projectidEQC2019-005797-P
dc.relation.projectidCEX2019-000910-S
dc.relation.projectid2017BP00241
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
local.citation.publicationNameNanoscale


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