title: Fast electron transport in metal organic vapor deposition grown dye-sensitized ZnO nanorod solar cells.
abstract: The electron transport in dye-sensitized solar cells with a MOCVD (metal organic vapor deposition)-grown ZnO nanorod array (ZnO-N) or a mesoporous film prepared from ZnO colloids (ZnO-C) as the working electrode was compared. The electrodes were of similar thickness (2 mum) and sensitized with zinc(II) meso-tetrakis(3-carboxyphenyl)porphyrin, while the electrolyte was I(-)/I(3)(-) in 3-methoxypropionitrile. Electron transport in the ZnO-C cells was comparable with that found for colloidal TiO(2) films (transport time approximately 10 ms) and was light intensity dependent. Electron transport in solar cells with ZnO-N electrodes was about 2 orders of magnitude faster ( approximately 30 mus). Thus, the morphology of the working ZnO electrode plays a key role for the electron transport properties.
authors.forename: Elena
authors.initials: E
authors.lastname: Galoppini
authors.forename: Jonathan
authors.initials: J
authors.lastname: Rochford
authors.forename: Hanhong
authors.initials: H
authors.lastname: Chen
authors.forename: Gaurav
authors.initials: G
authors.lastname: Saraf
authors.forename: Yicheng
authors.initials: Y
authors.lastname: Lu
authors.forename: Anders
authors.initials: A
authors.lastname: Hagfeldt
authors.forename: Gerrit
authors.initials: G
authors.lastname: Boschloo