Fast Electron Transport in Metal Organic Vapor Deposition Grown Dye-sensitized ZnO Nanorod Solar Cells
- 1 August 2006
- journal article
- letter
- Published by American Chemical Society (ACS) in The Journal of Physical Chemistry B
- Vol. 110 (33), 16159-16161
- https://doi.org/10.1021/jp062865q
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) meso-tetrakis(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.Keywords
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