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International Journal of Photoenergy
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International Journal of Photoenergy
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2013
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Article
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Fig 3
/
Research Article
Natural Dye-Sensitized Solar Cells Based on Highly Ordered TiO
2
Nanotube Arrays
Figure 3
Comparison of the absorption spectra of the natural extracts: (a) in acid solution; (b) adsorbed on TiO
2
electrode.
(a)
(b)