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  • Title: Fast electron transport in metal organic vapor deposition grown dye-sensitized ZnO nanorod solar cells.
    Author: Galoppini E, Rochford J, Chen H, Saraf G, Lu Y, Hagfeldt A, Boschloo G.
    Journal: J Phys Chem B; 2006 Aug 24; 110(33):16159-61. PubMed ID: 16913732.
    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.
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