NDLI: WO3/BiVO4 Photoanodes: Facets Matching at the Heterojunction and BiVO4 Layer Thickness Effects.

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WO₃/BiVO₄ Photoanodes: Facets Matching at the Heterojunction and BiVO₄ Layer Thickness Effects.

Content Provider	Europe PMC
Author	Grigioni, Ivan Di Liberto, Giovanni Dozzi, Maria Vittoria Tosoni, Sergio Pacchioni, Gianfranco Selli, Elena
Copyright Year	2021
Abstract	Photoelectrochemicalsolar energy conversion offers a way to directlystore light into energy-rich chemicals. Photoanodes based on the WO3/BiVO4 heterojunction are most effective mainlythanks to the efficient separation of photogenerated charges. TheWO3/BiVO4 interfacial space region in the heterojunctionis investigated here with the increasing thickness of the BiVO4 layer over a WO3 scaffold. On the basis of X-raydiffraction analysis results, density functional theory simulationsshow a BiVO4 growth over the WO3 layer alongthe BiVO4 {010} face, driven by the formation of a stableinterface with new covalent bonds, with a favorable band alignmentand band bending between the two oxides. This crystal facet phasematching allows a smooth transition between the electronic statesof the two oxides and may be a key factor ensuring the high efficiencyattained with this heterojunction. The photoelectrochemical activityof the WO3/BiVO4 photoanodes depends on boththe irradiation wavelength and the thickness of the visible-light-absorbingBiVO4 layer, a 75 nm thick BiVO4 layer on WO3 being best performing.
Related Links	https://europepmc.org/backend/ptpmcrender.fcgi?accid=PMC8414527&blobtype=pdf
Journal	ACS Applied Energy Materials [ACS Appl Energy Mater]
Volume Number	4
DOI	10.1021/acsaem.1c01623
PubMed Central reference number	PMC8414527
Issue Number	8
PubMed reference number	34485843
e-ISSN	25740962
Language	English
Publisher	American Chemical Society
Publisher Date	2021-08-12
Access Restriction	Open
Rights License	Permits the broadest form of re-use including for commercial purposes, provided that author attribution and integrity are maintained (https://creativecommons.org/licenses/by/4.0/). © 2021 American Chemical Society
Subject Keyword	photoelectrochemistry semiconductorinterface band alignment density functional theory WO3 BiVO4
Content Type	Text
Resource Type	Article
Subject	Energy Engineering and Power Technology Chemical Engineering Materials Chemistry Electrical and Electronic Engineering Electrochemistry

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