title: Assembly and Photocarrier Dynamics of Heterostructured Nanocomposite Photoanodes from Multicomponent Colloidal Nanocrystals.
abstract: Multicomponent oxides and their heterostructures are rapidly emerging as promising light absorbers to drive oxidative chemistry. To fully exploit their functionality, precise tuning of their composition and structure is crucial. Here, we report a novel solution-based route to nanostructured bismuth vanadate (BiVO4) that facilitates the assembly of BiVO4/metal oxide (TiO2, WO3, and Al2O3) nanocomposites in which the morphology of the metal oxide building blocks is finely tailored. The combination of transient absorption spectroscopy-spanning from picoseconds to second time scales-and photoelectrochemical measurements reveals that the achieved structural tunability is key to understanding and directing charge separation, transport, and efficiency in these complex oxide heterostructured films.
authors.affiliation: Joint Center for Artificial Photosynthesis, ‡Materials Science Division, §The Molecular Foundry, and ∥Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: Anna
authors.initials: A
authors.lastname: Loiudice
authors.affiliation: Joint Center for Artificial Photosynthesis, ‡Materials Science Division, §The Molecular Foundry, and ∥Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: Jason K
authors.initials: JK
authors.lastname: Cooper
authors.affiliation: Joint Center for Artificial Photosynthesis, ‡Materials Science Division, §The Molecular Foundry, and ∥Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: Lucas H
authors.initials: LH
authors.lastname: Hess
authors.affiliation: Joint Center for Artificial Photosynthesis, ‡Materials Science Division, §The Molecular Foundry, and ∥Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: Tracy M
authors.initials: TM
authors.lastname: Mattox
authors.affiliation: Joint Center for Artificial Photosynthesis, ‡Materials Science Division, §The Molecular Foundry, and ∥Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: Ian D
authors.initials: ID
authors.lastname: Sharp
authors.affiliation: Joint Center for Artificial Photosynthesis, ‡Materials Science Division, §The Molecular Foundry, and ∥Chemical Sciences Division, Lawrence Berkeley National Laboratory , One Cyclotron Road, Berkeley, California 94720, United States.
authors.forename: R
authors.initials: R
authors.lastname: Buonsanti
keywords: Colloidal synthesis; assembly; charge dynamics; photoelectrochemistry; ternary oxides