Layer-by-layer TiO2 films as efficient blocking layers in dye-sensitized solar cells

  • Patrocínio A
  • Paterno L
  • Murakami Iha N
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Abstract

Charge recombination at the conductor substrate/electrolyte interface has been prevented by using efficient blocking layers of TiO2compact films in dye-sensitized solar cell photoanodes. Compact blocking layers have been deposited before the mesoporous TiO2film by the layer-by-layer technique using titania nanoparticles as cations and sodium sulfonated polystyrene, PSS, as a polyanion. The TiO2/PSS blocking layer in a DSC prevents the physical contact of FTO and the electrolyte and leads to a 28% increase in the cell's overall conversion efficiency, from 5.7% to 7.3%. © 2009 Elsevier B.V. All rights reserved.

Author-supplied keywords

  • Blocking layer
  • Dye-sensitized solar cell
  • Metal oxide layer-by-layer film
  • TiO2

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