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


  • The authors thank BASF AG (Germany), GE Global Research (USA), and SFB-481 B4 (Deutsche Forschungsgemeinschaft, DFG) for the financial support.


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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).

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