Preventing Dye Aggregation on ZnO by Adding Water in the Dye-Sensitization Process
The Journal of Physical Chemistry C2011Vol. 115(39), pp. 19274–19279
Citations Over TimeTop 14% of 2011 papers
Rebecka Schölin, María Quintana, Erik M. J. Johansson, Maria Hahlin, Tannia Marinado, Anders Hagfeldt, Håkan Rensmo
Abstract
ZnO based dye-sensitized solar cells have been studied using N719 and Z-907 as sensitizing dyes, with and without including water to the dye solution. The solar cells have been characterized with photoelectric measurements and the interface between the dye and the ZnO surface has been studied using photoelectron spectroscopy. It was shown that water in the dye solution greatly reduces surface dye aggregation and thereby enhances the solar cell performance for N719. For Z-907 where no sign of dye aggregation could be found, the presence of water had minor effect on the surface structure and solar cell performance.
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