Photochromic behavior of ZnO/MoO3 interfaces.
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | ANDRON, Ines | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | MARICHEZ, Léa | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | JUBERA, Veronique | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| hal.structure.identifier | Plateforme Aquitaine de Caractérisation des Matériaux [PLACAMAT] | |
| dc.contributor.author | LABRUGÈRE, Christine | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | DUTTINE, Mathieu | |
| hal.structure.identifier | Laboratoire réactivité et chimie des solides - UMR CNRS 7314 [LRCS] | |
| dc.contributor.author | FRAYRET, Christine | |
| hal.structure.identifier | Institut de Chimie de la Matière Condensée de Bordeaux [ICMCB] | |
| dc.contributor.author | GAUDON, Manuel | |
| dc.date.issued | 2020 | |
| dc.identifier.issn | 1944-8244 | |
| dc.description.abstractEn | ZnO/MoO3 powder mixture exhibits a huge photochromic effect in comparison with the corresponding single oxides. The coloring efficiency of such combined material after UV-light irradiation was studied in terms of intensity, kinetics, and ZnO/MoO3 powder ratio. Additionally, the incidence of the pretreatment step of the ZnO and MoO3 powders under different atmospheres (air, Ar or Ar/H2 flow) was analyzed. The huge photochromic effect discovered herein was interpreted as the creation of “self-closed Schottky barrier” at the solid/solid interfaces between the two oxides, associated with the full redox reaction which can be pictured by the equation ZnO1−ε + MoO3 → ZnO + MoO3−ε. Remarkable optical contrast between virgin and color states as well as self-bleaching in dark allowing the reversibility of the photochromism is emphasized. From this first discovery, deeper characterization of the self-bleaching process shows that the photochromic mechanism is complex with a bleaching efficiency (possibility to come back to the virgin material optical properties without any deterioration) and a bleaching kinetics, which are both dependent on the coloring irradiation time. This demonstrates that the oxygen exchange through the Schottky interface proceeds in at least two convoluted steps: an anionic surface exchange allowing a reversibility of the redox reaction followed by bulk diffusion of the exchanged anions which are then definitively trapped. An emergent “negative photochromism effect” (i.e., photochromism associated with a self-bleaching instead of a darkening under irradiation) is observed after a long irradiation time. | |
| dc.description.sponsorship | Fluorures inorganiques photochromes - ANR-16-CE08-0029 | |
| dc.language.iso | en | |
| dc.publisher | Washington, D.C. : American Chemical Society | |
| dc.subject.en | photochromism | |
| dc.subject.en | Schottky barrier | |
| dc.subject.en | interfaces | |
| dc.subject.en | photoredox | |
| dc.subject.en | zinc oxide | |
| dc.subject.en | molybdenum oxide | |
| dc.title.en | Photochromic behavior of ZnO/MoO3 interfaces. | |
| dc.type | Article de revue | |
| dc.identifier.doi | 10.1021/acsami.0c13335 | |
| dc.subject.hal | Chimie/Chimie théorique et/ou physique | |
| dc.subject.hal | Chimie/Chimie inorganique | |
| dc.subject.hal | Chimie/Matériaux | |
| bordeaux.journal | ACS Applied Materials & Interfaces | |
| bordeaux.page | 46972–46980 | |
| bordeaux.volume | 12 | |
| bordeaux.issue | 41 | |
| bordeaux.peerReviewed | oui | |
| hal.identifier | hal-02982997 | |
| hal.version | 1 | |
| hal.popular | non | |
| hal.audience | Internationale | |
| hal.origin.link | https://hal.archives-ouvertes.fr//hal-02982997v1 | |
| bordeaux.COinS | ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=ACS%20Applied%20Materials%20&%20Interfaces&rft.date=2020&rft.volume=12&rft.issue=41&rft.spage=46972%E2%80%9346980&rft.epage=46972%E2%80%9346980&rft.eissn=1944-8244&rft.issn=1944-8244&rft.au=ANDRON,%20Ines&MARICHEZ,%20L%C3%A9a&JUBERA,%20Veronique&LABRUG%C3%88RE,%20Christine&DUTTINE,%20Mathieu&rft.genre=article |
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