High Efficiency of Dye-Sensitized Solar Cells Based on Ruthenium and Metal-Free Dyes

<table>SEM images of (a) light-scattering layer of double layer TiO<sub>2</sub> films and (b) TiCl<sub>4</sub> posttreatment of light-scattering layer.</table>

International Journal of Photoenergy

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Figure 2

Figure 2: High Efficiency of Dye-Sensitized Solar Cells Based on Ruthenium and Metal-Free Dyes 