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Improvement of the photochromism taking place on ZnO/MoO3 combined material interfaces

hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 [LRCS]
dc.contributor.authorANDRON, Ines
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorMARICHEZ, Léa
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorJUBERA, Veronique
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorFARGUES, Alexandre
hal.structure.identifierLaboratoire réactivité et chimie des solides - UMR CNRS 7314 [LRCS]
dc.contributor.authorFRAYRET, Christine
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorGAUDON, Manuel
dc.date.issued2021
dc.description.abstractEnRecently, we discovered a huge photochromic effect for ZnO/MoO 3 powder mixtures compared with the corresponding single oxides. The former study focused on the coloring efficiency after UV-light irradiation and demonstrated that the pre-existing electrons in the conductive band of ZnO are of huge importance to the photochromism efficiency. Herein, the creation of the ''self-closed Schottky barrier'' at the solid-solid interfaces between the two oxides, associated with the full redox reaction at the origin of the photochromic properties, was modulated by (i) doping ZnO with Al 3+ ions, (ii) annealing the powder mixture under low p(O 2) atmosphere, and (iii) synthesizing our own ZnO nanoparticles and MoO 3 particles using a polyol process. The characterization of the colouring effect under irradiation as well as the selfbleaching process allowed shedding light on this very complex photochromic mechanism. The coloring and bleaching efficiency (i.e. possibility to darken to more or less deep blue and to come back to the virgin material optical properties without any deterioration) depends upon multiple interconnected parameters controlling either the particle size and the interface areas between MoO 3 and ZnO oxides or the number of pre-electrons in conduction bands of ZnO and MoO 3 oxides. By correctly interpreting the ins and outs of the photochromism taking place at the created Schottky barriers in these binary ZnO/MoO 3 mixtures, the exchange of the electrons and the oxygen anions through this Schottky interface can be manipulated in order to optimize the huge photochromism phenomenon.
dc.description.sponsorshipFluorures inorganiques photochromes - ANR-16-CE08-0029
dc.language.isoen
dc.publisherRoyal Society of Chemistry
dc.title.enImprovement of the photochromism taking place on ZnO/MoO3 combined material interfaces
dc.typeArticle de revue
dc.identifier.doi10.1039/d0ma00896f
dc.subject.halChimie/Matériaux
bordeaux.journalMaterials Advances
bordeaux.page782 - 792
bordeaux.volume2
bordeaux.issue2
bordeaux.peerReviewedoui
hal.identifierhal-03531890
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03531890v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Materials%20Advances&rft.date=2021&rft.volume=2&rft.issue=2&rft.spage=782%20-%20792&rft.epage=782%20-%20792&rft.au=ANDRON,%20Ines&MARICHEZ,%20L%C3%A9a&JUBERA,%20Veronique&FARGUES,%20Alexandre&FRAYRET,%20Christine&rft.genre=article


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