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dc.contributor.authorPradhan, Santanu
dc.contributor.authorStavrinadis, Alexandros
dc.contributor.authorGupta, Shuchi
dc.contributor.authorBi, Yu
dc.contributor.authorStasio, Francesco Di
dc.contributor.authorKonstantatos, Gerasimos
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2018-04-25T11:15:36Z
dc.date.available2018-04-25T11:15:36Z
dc.date.issued2017-04-12
dc.identifier.citationPradhan, S. [et al.]. Trap-state suppression and improved charge transport in PbS quantum dot solar cells with synergistic mixed ligand treatments. "Small", 12 Abril 2017, vol. 13, núm. 21.
dc.identifier.issn1613-6810
dc.identifier.urihttp://hdl.handle.net/2117/116670
dc.description.abstractThe power conversion efficiency of colloidal PbS‐quantum‐dot (QD)‐based solar cells is significantly hampered by lower‐than‐expected open circuit voltage (VOC). The VOC deficit is considerably higher in QD‐based solar cells compared to other types of existing solar cells due to in‐gap trap‐induced bulk recombination of photogenerated carriers. Here, this study reports a ligand exchange procedure based on a mixture of zinc iodide and 3‐mercaptopropyonic acid to reduce the VOC deficit without compromising the high current density. This layer‐by‐layer solid state ligand exchange treatment enhances the photovoltaic performance from 6.62 to 9.92% with a significant improvement in VOC from 0.58 to 0.66 V. This study further employs optoelectronic characterization, X‐ray photoelectron spectroscopy, and photoluminescence spectroscopy to understand the origin of VOC improvement. The mixed‐ligand treatment reduces the sub‐bandgap traps and significantly reduces bulk recombination in the devices.
dc.format.extent9 p.
dc.language.isoeng
dc.publisherWiley
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.lcshSolar cells
dc.subject.othersolar cells
dc.titleTrap-state suppression and improved charge transport in PbS quantum dot solar cells with synergistic mixed ligand treatments
dc.typeArticle
dc.subject.lemacCèl·lules solars
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttps://onlinelibrary.wiley.com/doi/full/10.1002/smll.201700598
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO//MAT2014-56210-R/ES/MATERIALES NANOCOMPUESTOS INORGANICOS CON PROPIEDADES CONTROLADAS JERARQUICAMENTE COMO UNA NUEVA PLATAFORMA PARA APLICACIONES FOTOVOLTAICAS/
dc.relation.projectid2014SGR1548
dc.relation.projectidinfo:eu-repo/grantAgreement/MINECO//SEV-2015-0522/ES/AGR-INSTITUTO DE CIENCIAS FOTONICAS/
dc.relation.projectidinfo:eu-repo/grantAgreement/EC/H2020/703018/EU/Novel processing of colloidal nanocrystals for optoelectronic applications/NANOPTO
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/EC/FP7/604391/EU/Graphene-Based Revolutions in ICT And Beyond/GRAPHENE
local.citation.publicationNameSmall
local.citation.volume13
local.citation.number21
local.citation.startingPage1700598


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