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dc.contributor.authorMachado, Pamelaes_ES
dc.contributor.authorScigaj, Mateuszes_ES
dc.contributor.authorGázquez, Jaumees_ES
dc.contributor.authorRueda, Esteles_ES
dc.contributor.authorSánchez Díaz, Antonioes_ES
dc.contributor.authorFina, Ignasies_ES
dc.contributor.authorGibert Roca, Martíes_ES
dc.contributor.authorPuig Molina, Teresaes_ES
dc.contributor.authorObradors, Xavieres_ES
dc.contributor.authorCampoy Quiles, Marianoes_ES
dc.contributor.authorColl, Marionaes_ES
dc.date.accessioned2019-01-30T14:17:28Z-
dc.date.available2019-01-30T14:17:28Z-
dc.date.issued2019-01-16-
dc.identifier.citationChemistry of Materials: 10.1021/acs.chemmater.8b04380 (2019)es_ES
dc.identifier.issn0897-4756-
dc.identifier.urihttp://hdl.handle.net/10261/174980-
dc.description.abstractFerroelectric perovskite oxides are emerging as a promising photoactive layer for photovoltaic applications due to their very high stability and their alternative ferroelectricity-related mechanism for solar energy conversion that could lead to extraordi-narily high efficiencies. One of the biggest challenges so far is to reduce their band gap towards the visible while simultane-ously retaining ferroelectricity. To address these two issues, herein it is performed an elemental composition engineering of BiFeO3 by substituting Fe by Co cations, as means to tune the characteristics of the transition metal-oxygen bond. We demonstrate by solution processing the formation of epitaxial, pure phase and stable BiFe1-xCoxO3 thin films for x=0.3 and film thickness up to 100 nm. Importantly, the band gap can be tuned from 2.7 eV to 2.3 eV upon cobalt substitution while simultaneously enhancing ferroelectricity. As a proof of concept, non-optimized vertical devices have been fabricated and, reassuringly, the electrical photoresponse in the visible of the Co-substituted phase is improved with respect to the unsubsti-tuted oxide.es_ES
dc.description.sponsorshipWe would like to acknowledge Prof. Josep Fontcuberta for fruitful discussions and comments on this study and for providing access to his experimental facilities. This research was supported by the Spanish MINECO (“Severo Ochoa” Programme for Centres of Excellence in R&D SEV-2015-0496 and FIPNANOSOLE- 2016, MAT2017-83169-R, MAT2014-51778-C2- 1-R, MAT2015-70850-P, MAT2017-85232-R (AEI/FEDER, EU)), the Generalitat de Catalunya (2017-SGR-1519, 2017 SGR- 1377), the European Research Council-ERC (FOREMAT under grant agreement no. 648901) and “L’Oreal UNESCO For Women in Science”. M.C., J.G. and I.F. acknowledge RyC contracts (2013-12448, 2012-11709 and RYC-2017-22531). I.F. is grateful to MINECO for MAT2015-73839-JIN project. The HRTEM microscopy work was conducted at the Center for Nanophase Materials Sciences at Oak Ridge National Laboratory, which is a DOE Office of Science User Facility.es_ES
dc.language.isoenges_ES
dc.publisherAmerican Chemical Societyes_ES
dc.relationMINECO/ICTI2013-2016/SEV-2015-0496es_ES
dc.relationMINECO/ICTI2013-2016/MAT2017-83169-Res_ES
dc.relationMINECO/ICTI2013-2016/MAT2014-51778-C2-1-Res_ES
dc.relationMINECO/ICTI2013-2016/MAT2015-70850-Pes_ES
dc.relationMINECO/ICTI2013-2016/MAT2017-85232-Res_ES
dc.relationinfo:eu-repo/grantAgreement/EC/H2020/648901es_ES
dc.relation.isversionofPostprintes_ES
dc.rightsopenAccessen_EN
dc.titleBand gap tuning of solution processed ferroelectric perovskite BiFe1-xCoxO3 thin filmses_ES
dc.typeartículoes_ES
dc.description.peerreviewedPeer reviewedes_ES
dc.relation.publisherversionhttp://dx.doi.org/10.1021/acs.chemmater.8b04380es_ES
dc.embargo.terms2020-01-16es_ES
dc.contributor.funderMinisterio de Economía y Competitividad (España)es_ES
dc.contributor.funderGeneralitat de Catalunyaes_ES
dc.contributor.funderEuropean Research Counciles_ES
dc.contributor.funderL'Oréal-UNESCO For Women in Sciencees_ES
dc.relation.csices_ES
oprm.item.hasRevisionno ko 0 false*
dc.identifier.funderhttp://dx.doi.org/10.13039/501100000781es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100003329es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100002809es_ES
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