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Highly Efficient Solid‐State Dye‐Sensitized TiO 2 Solar Cells Using Donor‐Antenna Dyes Capable of Multistep Charge‐Transfer Cascades
Author(s) -
Karthikeyan C. S.,
Wietasch H.,
Thelakkat M.
Publication year - 2007
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.200601872
Subject(s) - cascade , materials science , charge (physics) , absorption (acoustics) , solid state , amine gas treating , dye sensitized solar cell , ruthenium , optoelectronics , antenna (radio) , state (computer science) , electron transfer , electron donor , photochemistry , chemical engineering , engineering physics , telecommunications , computer science , chemistry , organic chemistry , physics , electrode , quantum mechanics , algorithm , engineering , electrolyte , composite material , catalysis
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).