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Efficiency improvement in solid-state-dye-sensitized photovoltaics with an amphiphilic Ruthenium-dye
Author(s) -
Lukas SchmidtMende,
Shaik M. Zakeeruddin,
Michaël Grätzel
Publication year - 2004
Publication title -
applied physics letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.182
H-Index - 442
eISSN - 1077-3118
pISSN - 0003-6951
DOI - 10.1063/1.1844032
Subject(s) - ruthenium , dye sensitized solar cell , materials science , nanoporous , amphiphile , photovoltaics , chemical engineering , silicon , photochemistry , layer (electronics) , solar cell , energy conversion efficiency , photovoltaic system , optoelectronics , nanotechnology , chemistry , copolymer , organic chemistry , polymer , composite material , catalysis , ecology , electrode , engineering , electrolyte , biology
We report a solid-state-dye-sensitized solar cell with an efficiency of 4% over the standard air mass 1.5 spectrum (100mW∕cm2). This was made possible by using an amphiphilic dye with hydrophobic spacers. We attribute the performance to the self-assembly of the dye to a dense layer on the TiO2 surface with its carboxylate groups as anchors and with its hydrophobic isolating chains as blocking layer between hole conductor and TiO2. In addition we studied the dependence of the thickness of the nanoporous TiO2 layer and the device performance. These results show the high potential for solid-state-dye-sensitized solar cells to compete with amorphous silicon cells as low-cost alternative.

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