title: Nanocomposite Architecture for Rapid, Spectrally-Selective Electrochromic Modulation of Solar Transmittance.
abstract: Two active electrochromic materials, vacancy-doped tungsten oxide (WO(3-x)) nanocrystals and amorphous niobium oxide (NbOx) glass are arranged into a mesostructured architecture. In a strategy applicable across electrochemical applications, the critical dimensions and interfacial connections in the nanocomposite are designed to optimize pathways for electrochemical charging and discharging. The result is an unprecedented optical range for modulation of visible and near-infrared solar radiation with rapid switching kinetics that indicate the WO(3-x) nanocrystal framework effectively pumps charge out of the normally sluggish NbOx glass. The material is durable for at least 2000 electrochemical cycles.
authors.affiliation: †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Jongwook
authors.initials: J
authors.lastname: Kim
authors.affiliation: †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Gary K
authors.initials: GK
authors.lastname: Ong
authors.affiliation: †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Yang
authors.initials: Y
authors.lastname: Wang
authors.affiliation: †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Gabriel
authors.initials: G
authors.lastname: LeBlanc
authors.affiliation: ∥The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Teresa E
authors.initials: TE
authors.lastname: Williams
authors.affiliation: ∥The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Tracy M
authors.initials: TM
authors.lastname: Mattox
authors.affiliation: ∥The Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, California 94720, United States.
authors.forename: Brett A
authors.initials: BA
authors.lastname: Helms
authors.affiliation: †McKetta Department of Chemical Engineering, University of Texas at Austin, Austin, Texas 78712, United States.
authors.forename: Delia J
authors.initials: DJ
authors.lastname: Milliron
keywords: block copolymer templated assembly; electrochromic; nanocomposite architecture; plasmonic nanocrystals