Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/342057
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dc.contributor.CRUESPUNIVERSIDADE ESTADUAL DE CAMPINASpt_BR
dc.contributor.authorunicampCarminati, Saulo do Amaral-
dc.contributor.authorunicampNogueira, Ana Flávia-
dc.typeArtigopt_BR
dc.titleEngineering interfacial modification on nanocrystalline hematite photoanodes: A close look into the efficiency parameterspt_BR
dc.contributor.authorMuche, D.N.F.-
dc.contributor.authorCarminati, S.A.-
dc.contributor.authorNogueira, A.F.-
dc.contributor.authorSouza, F.L.-
dc.subjectHematitapt_BR
dc.subject.otherlanguageHematitept_BR
dc.description.abstractThis work describes an approach to direct evaluate the role of selected modifier added over hematite photoanode interfaces for light assisted water splitting. Hematite photoanodes with thickness varying from 25 up to 130 nm were designed via spin coating deposition of polymeric precursor that provides mesoporous planar morphology. The photoelectrochemical data analyzed in terms of global efficiency parameter (ηglobal) revealed a close dependence with hematite thickness for unmodified photoanode, which large number of interfaces associated with high charge recombination rate led to drop the electrode performance. To address this issue and manipulate the large number of interfaces due to the planar morphology, Sn4+ ions (1 and 3% molar ratio) were deposited over the hematite surface leading to enhance the electronic transport with a cost of creation of surface states at the solid-liquid interface. Then, a second modification process was done by photoelectrodeposition of Ni/Fe based material to suppress or minimizing the effect of surface state created by the Sn4+ ions addition. The results show that the interfacial traps were mitigated for the thinner hematite photoanodes, where the presence of Sn4+ and Ni/Fe significantly increases the ηglobal. The present find, highlights the importance of morphology design that allows a combination of modifier insertion to work in synergy for enhancing the overall photoanode performancept_BR
dc.relation.ispartofSolar energy materials and solar cellspt_BR
dc.publisher.cityAmsterdampt_BR
dc.publisher.countryPaíses Baixospt_BR
dc.publisherElsevierpt_BR
dc.date.issued2020-
dc.date.monthofcirculationMaypt_BR
dc.language.isoengpt_BR
dc.description.volume208pt_BR
dc.rightsFechadopt_BR
dc.sourceSCOPUSpt_BR
dc.identifier.issn0927-0248pt_BR
dc.identifier.doi10.1016/j.solmat.2019.110377pt_BR
dc.identifier.urlhttps://www.sciencedirect.com/science/article/pii/S0927024819307032pt_BR
dc.description.sponsorshipFUNDAÇÃO DE AMPARO À PESQUISA DO ESTADO DE SÃO PAULO - FAPESPpt_BR
dc.description.sponsordocumentnumber2017/11986-5; 2019/01470-7pt_BR
dc.date.available2020-05-22T21:34:57Z-
dc.date.accessioned2020-05-22T21:34:57Z-
dc.description.provenanceSubmitted by Sanches Olivia (olivias@unicamp.br) on 2020-05-22T21:34:57Z No. of bitstreams: 0en
dc.description.provenanceMade available in DSpace on 2020-05-22T21:34:57Z (GMT). No. of bitstreams: 0 Previous issue date: 2020en
dc.identifier.urihttp://repositorio.unicamp.br/jspui/handle/REPOSIP/342057-
dc.contributor.departmentsem informaçãopt_BR
dc.contributor.departmentDepartamento de Química Inorgânicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.contributor.unidadeInstituto de Químicapt_BR
dc.subject.keywordPlanar morphologypt_BR
dc.subject.keywordSpin-coatingpt_BR
dc.subject.keywordWater splittingpt_BR
dc.subject.keywordSurface passivationpt_BR
dc.identifier.source2-s2.0-85077445603pt_BR
dc.creator.orcid0000-0002-1351-2625pt_BR
dc.creator.orcid0000-0002-0838-7962pt_BR
dc.type.formArtigopt_BR
dc.identifier.articleid110377pt_BR
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