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Crystallized V2O5 as oxidized phase for unexpected multicolor electrochromism in V2O3 thick film

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMJEJRI, Issam
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDON, Manuel
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorSONG, Giljoo
hal.structure.identifierPlateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT]
dc.contributor.authorLABRUGÈRE, Christine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorROUGIER, Aline
dc.date.issued2018-05-30
dc.identifier.issn2574-0962
dc.description.abstractEnOur e-connected society is eager to develop devices with tunable colors. Electrochromic materials, able to modify their optical properties under an applied voltage, offer a smart solution. In the present study, we have successfully synthesized two vanadium oxide powders from a polyol mediated synthesis and powder suspensions were coated on glass/ITO substrates by doctor blading. The electrochemical and optical properties of the VxOy films are investigated by cyclic voltammetry (CV) coupled with in-situ UV–Visible spectroscopy. Both V2O5 and V2O3 films exhibit reasonably good cycling stability, significant reflectance modulation, high optical contrast and good memory effects revealing the unknown EC properties of V2O3. The similar green ⇄ blue ⇄ orange reversible color changes for both vanadium oxides appears suitable for display application. Then, the evolution of the vanadium cation oxidation states and of the structure of V2O5 and V2O3 upon cycling are analyzed by ex-situ XPS and ex-situ XRD (at grazing incident angle). This work highlights a robust and novel scenario upon cycling, nearly the same whatever the raw film composition that shows, for each cycle, the crystallization of V2O5 upon oxidation, followed by amorphization upon reduction.
dc.language.isoen
dc.publisherACS
dc.subject.enElectrochromism materials
dc.subject.enVanadium oxides
dc.subject.enPolyol synthesis
dc.subject.enDoctor Blade
dc.subject.enOptical properties
dc.subject.enElectrochromism materials
dc.subject.enVanadium oxides
dc.title.enCrystallized V2O5 as oxidized phase for unexpected multicolor electrochromism in V2O3 thick film
dc.typeArticle de revue
dc.identifier.doi10.1021/acsaem.8b00386
dc.subject.halChimie/Matériaux
bordeaux.journalACS Applied Energy Materials
bordeaux.page2721-2729
bordeaux.volume1
bordeaux.issue6
bordeaux.peerReviewedoui
hal.identifierhal-01831870
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-01831870v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ACS%20Applied%20Energy%20Materials&rft.date=2018-05-30&rft.volume=1&rft.issue=6&rft.spage=2721-2729&rft.epage=2721-2729&rft.eissn=2574-0962&rft.issn=2574-0962&rft.au=MJEJRI,%20Issam&GAUDON,%20Manuel&SONG,%20Giljoo&LABRUG%C3%88RE,%20Christine&ROUGIER,%20Aline&rft.genre=article


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