Highly Efficient Solid‐State Dye‐Sensitized TiO₂ Solar Cells Using Donor‐Antenna Dyes Capable of Multistep Charge‐Transfer Cascades

Novel ruthenium dyes with electron- donor antenna groups (triphenyl amine and tetraphenylbenzidine) are developed and applied in solid-state dye- sensitized solar cells. The higher absorption arising from extended conjugation in these dyes leads to efficient light harvesting, which in turn results in higher short-circuit currents; multistep charge-transfer cascades take place, very similar to the photosynthetic cascade process (see figure). Supporting information for this article is available on the WWW under http://www.wiley-vch.de/contents/jc_2089/2007/c1872_s.pdf or from the author. Please note: The publisher is not responsible for the content or functionality of any supporting information supplied by the authors. Any queries (other than missing content) should be directed to the corresponding author for the article.