Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/101767
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dc.contributor.authorRogero, Celia-
dc.contributor.authorMao, S. S.-
dc.contributor.authorHimpsel, F. J.-
dc.contributor.authorVayssieres, L.-
dc.date.accessioned2014-09-08T08:21:53Z-
dc.date.available2014-09-08T08:21:53Z-
dc.date.issued2012-
dc.identifierdoi: 10.1021/jp308918e-
dc.identifierissn: 1932-7447-
dc.identifiere-issn: 1932-7455-
dc.identifier.citationJournal of Physical Chemistry C 116(43): 22780-22785 (2012)-
dc.identifier.urihttp://hdl.handle.net/10261/101767-
dc.description.abstractThe electronic structure origins of interfacial losses in hematite photoanodes and the cause of the literature-reported order-of-magnitude photocurrent increase upon short high-temperature annealing are investigated. Synchrotron-based soft X-ray absorption spectroscopy is used to probe the unoccupied states at and near the interface between hematite (α-Fe 2O 3) and fluorine-doped tin oxide (FTO). Oxygen K-edge and iron L-edge absorption spectra indicate that the interfacial interaction reduces the degree of p-d hybridization and alters the crystal field in α-Fe 2O 3. The interface is found to be associated with a distribution of unoccupied oxygen p-hybridized states located below the lowest unoccupied iron 3d states in α-Fe 2O 3 (just below the conduction band minimum), which are eliminated with high-temperature processing. These data facilitate future efforts to engineer favorable interfacial compositions and associated electrochemical potential gradients within photoanodes, which are required to efficiently separate charge carriers in operating photoelectrochemical systems such as solar cells and photocatalytic devices. © 2012 American Chemical Society.-
dc.description.sponsorshipThis research has been supported by NSF/CMMI under grant #1036076; by the U.S. Department of Energy, Office of Energy Efficiency and Renewable Energy; and by the Office of Basic Energy Sciences under the Contracts DE-SC0006931, DEAC02- 05CH11231 (ALS), DE-FG02-01ER45917 (end station). The International Research Center for Renewable Energy, State Key Laboratory of Multiphase Flow in Power Engineering, Xian Jiaotong University, the Thousand Talents plan, and the National Natural Science Foundation of China (No.51121092) are acknowledged for their support.-
dc.publisherAmerican Chemical Society-
dc.rightsclosedAccess-
dc.titleOn the interfacial electronic structure origin of efficiency enhancement in hematite photoanodes-
dc.typeartículo-
dc.identifier.doi10.1021/jp308918e-
dc.date.updated2014-09-08T08:21:54Z-
dc.description.versionPeer Reviewed-
dc.language.rfc3066eng-
dc.contributor.funderNational Science Foundation (US)-
dc.contributor.funderDepartment of Energy (US)-
dc.contributor.funderXi'an Jiaotong University-
dc.contributor.funderNational Natural Science Foundation of China-
dc.identifier.funderhttp://dx.doi.org/10.13039/100000001es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/501100001809es_ES
dc.identifier.funderhttp://dx.doi.org/10.13039/100000015es_ES
item.fulltextNo Fulltext-
item.openairetypeartículo-
item.openairecristypehttp://purl.org/coar/resource_type/c_18cf-
item.cerifentitytypePublications-
item.grantfulltextnone-
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