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http://hdl.handle.net/10261/173983
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Campo DC | Valor | Lengua/Idioma |
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dc.contributor.author | Hernández-Ferrer, Javier | es_ES |
dc.contributor.author | Ansón Casaos, Alejandro | es_ES |
dc.contributor.author | Víctor-Román, Sandra | es_ES |
dc.contributor.author | Sanahuja-Parejo, Olga | es_ES |
dc.contributor.author | Martínez Fernández de Landa, María Teresa | es_ES |
dc.contributor.author | Villacampa, Belén | es_ES |
dc.contributor.author | Benito, Ana M. | es_ES |
dc.contributor.author | Maser, Wolfgang K. | es_ES |
dc.date.accessioned | 2019-01-11T13:49:54Z | - |
dc.date.available | 2019-01-11T13:49:54Z | - |
dc.date.issued | 2019 | - |
dc.identifier.citation | Electrochimica Acta 298: 279-287 (2019) | es_ES |
dc.identifier.issn | 0013-4686 | - |
dc.identifier.uri | http://hdl.handle.net/10261/173983 | - |
dc.description | 9 Figuras, 2 Tablas.-- Datos suplementarios de este artículo disponibles en línea en la página web del editor.-- © 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/ | es_ES |
dc.description.abstract | Nanostructured TiO2 and graphene-based materials constitute components of actual interest in devices related to solar energy conversion and storage. In this work, we show that a thin layer of electrochemically reduced graphene oxide (ECrGO), covering nanostructured TiO2 photoelectrodes, can significantly improve the photoactivity. In order to understand the working principle, ECrGO/TiO2 photoelectrodes with different ECrGO thicknesses were prepared and studied by a set of photoelectrochemical measurements. Methanol in alkaline conditions was employed as effective hole acceptor probe to elucidate the electronic phenomena in the electrode layers and interfaces. These studies underline the hole accepting properties of ECrGO and reveal the formation of a p-n junction at the interface between ECrGO and TiO2. It is shown for the first time that the resulting space charge region of about 10 nm defines the operational functionality of the ECrGO layer. Films thinner than the space charge region act as hole transport layer (HTL), which efficiently transfers holes to the liquid interface thus leading to enhanced photoactivity. Thicker films however act as hole blocking layer (HBL), resulting in a systematic decrease of the photoactivity. The finding of a thickness dependent threshold value for the operation of ECrGO as HTL and HBL is of general interest for the fabrication of optoelectronic devices with improved performance. | es_ES |
dc.description.sponsorship | The authors thank Prof. M.T. Martínez for AFM measurements and the Analysis Service of the Instituto de Carboquímica (ICB-CSIC) for XPS measurements. This work has received funding from the Spanish MINEICO (project grant ENE 2016-79282-C5-1-R), Gobierno de Aragón(Grupo ReconocidoDGA T03_17R), and associated EU Regional Development Funds. S.V. acknowledges Spanish MINEICO for her PhD grant (BES2014-068727 and associated EU Social Funds). | es_ES |
dc.language.iso | eng | es_ES |
dc.publisher | Elsevier | es_ES |
dc.relation | info:eu-repo/grantAgreement/MINECO/Plan Estatal de Investigación Científica y Técnica y de Innovación 2013-2016/ENE2016-79282-C5-1-R | es_ES |
dc.relation.isversionof | Postprint | es_ES |
dc.relation.isreferencedby | Hernández-Ferrer, Javier; Istif, Emin; Ansón Casaos, Alejandro; Santidrián, Ana; Benito, Ana M.; Maser, Wolfgang K. Assessment of charge transfer phenomena in nanostructured composite materials using photoelectrochemical methods. http://hdl.handle.net/10261/227192 | - |
dc.rights | openAccess | en_EN |
dc.subject | Titanium dioxide | es_ES |
dc.subject | Reduced graphene oxide | es_ES |
dc.subject | Photoelectrons | es_ES |
dc.subject | Hole-transport layer | es_ES |
dc.subject | Photoelectrochemistry | es_ES |
dc.subject | Titania | es_ES |
dc.subject | Óxido de grafeno reducido | es_ES |
dc.subject | Fotoelectrodos | es_ES |
dc.subject | Capa de conducción de agujeros | es_ES |
dc.subject | Fotoelectroquímica | es_ES |
dc.title | Photoactivity improvement of TiO2 electrodes by thin hole transport layers of reduced graphene oxide | es_ES |
dc.type | artículo | es_ES |
dc.identifier.doi | 10.1016/j.electacta.2018.12.085 | - |
dc.description.peerreviewed | Peer reviewed | es_ES |
dc.relation.publisherversion | http://dx.doi.org/10.1016/j.electacta.2018.12.085 | es_ES |
dc.embargo.terms | 2020-12-19 | es_ES |
dc.rights.license | http://creativecommons.org/licenses/by-nc-nd/4.0/ | - |
dc.contributor.funder | Ministerio de Economía, Industria y Competitividad (España) | es_ES |
dc.contributor.funder | European Commission | es_ES |
dc.contributor.funder | Gobierno de Aragón | es_ES |
dc.relation.csic | Sí | es_ES |
oprm.item.hasRevision | no ko 0 false | * |
dc.identifier.funder | http://dx.doi.org/10.13039/501100000780 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100010067 | es_ES |
dc.identifier.funder | http://dx.doi.org/10.13039/501100010198 | es_ES |
dc.contributor.orcid | Hernández-Ferrer, Javier [0000-0002-6586-6935] | es_ES |
dc.contributor.orcid | Ansón Casaos, Alejandro [0000-0002-3134-8566] | es_ES |
dc.contributor.orcid | Víctor-Román, Sandra [0000-0003-0924-5840] | es_ES |
dc.contributor.orcid | Sanahuja-Parejo, Olga [0000-0002-1891-4324] | es_ES |
dc.contributor.orcid | Villacampa, Belén [0000-0001-9814-0834] | es_ES |
dc.contributor.orcid | Benito, Ana M. [0000-0002-8654-7386] | es_ES |
dc.contributor.orcid | Maser, Wolfgang K. [0000-0003-4253-0758] | es_ES |
dc.type.coar | http://purl.org/coar/resource_type/c_6501 | es_ES |
item.languageiso639-1 | en | - |
item.fulltext | With Fulltext | - |
item.openairecristype | http://purl.org/coar/resource_type/c_18cf | - |
item.cerifentitytype | Publications | - |
item.grantfulltext | open | - |
item.openairetype | artículo | - |
Aparece en las colecciones: | (ICB) Artículos (ICMA) Artículos |
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Postprint_Electrochimica Acta_JHernandez.pdf | 8,79 MB | Adobe PDF | Visualizar/Abrir |
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