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The porous titanium dioxide electrode plays an important role for the adsorption of dye in dye-sensitized solar cells. Two kinds of treatment used to improve the adsorption of the dye on titanium dioxide were investigated in this study. Before the dye adsorption, the titanium dioxide electrode was illuminated under ultraviolet light to result in self-cleaning by photocatalysis and then immersed in hydrogen chloride acid for surface protonation. The adsorption of dye is enhanced from Fourier-transform infrared spectrometer examination. The efficiency of dye-sensitized solar cell with the titanium dioxide electrode treated by ultraviolet light was improved from 6.29 to 6.71% and to 7.39% with both treatments.
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Lee et al. (2011) studied this question.
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