Fast electron transport in metal organic vapor deposition grown dye-sensitized ZnO nanorod solar cells

Elena Galoppini, Jonathan Rochford, Hanhong Chen, Gaurav Saraf, Yicheng Lu, Anders Hagfeldt, Gerrit Boschloo

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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 μm) and sensitized with zinc(II) mesotetrakis(3-carboxyphenyl)porphyrin, while the electrolyte was I -/I3- in 3-methoxypropionitrile. Electron transport in the ZnO-C cells was comparable with that found for colloidal TiO2 films (transport time ∼ 10 ms) and was light intensity dependent. Electron transport in solar cells with ZnO-N electrodes was about 2 orders of magnitude faster (∼30 μs). Thus, the morphology of the working ZnO electrode plays a key role for the electron transport properties.

Original languageEnglish (US)
Pages (from-to)16139-16161
Number of pages23
JournalJournal of Physical Chemistry B
Volume110
Issue number33
DOIs
StatePublished - Aug 24 2006

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All Science Journal Classification (ASJC) codes

  • Physical and Theoretical Chemistry
  • Surfaces, Coatings and Films
  • Materials Chemistry

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