Preparation of highly concentrated and stable conducting polymer solutions and their application in high-efficiency dye-sensitized solar cell

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Abstract

Highly concentrated, good dispersed and stable conducting polyaniline and poly(3,4-ethylenedioxythiophene)/hexafluoro-isopropanol (HFIP) colloid solutions (PANI/ HFIP and PEDOT)/HFIP) are prepared simply by dissolving the doped polymer powders in HFIP. The hydrogen bonding between the doped polymer and fluorinated solvent is not only a driving force for forming concentrated and stable solution but also disintegrates polymer chains in the colloid particles to form more expanded coil-like conformation. PANI-SO4-F (H 2SO4 doped PANI) and PEDOT-F (doped PEDOT) films casted from the corresponding HFIP solutions have not only high electrical conductivity and electrocatalytic activity but also high surface area and good adhesion on the substrate. Dye-sensitized solar cells (DSCs) using CYC-B11 sensitizer, I-/I-3redox pair electrolyte and PANI-SO --F or PEDOT-F/FTO counter electrode achieve the conversion efficiency (η) of 8.8-9.0% which is as good as those for DSCs based on Pt/FTO counter electrode fabricated with the same procedure using the same sensitizer and electrolyte. The excellent photoelectric properties, easy preparation and low cost make conjugated polymer to be a credible material for replacing Pt in DSCs.

Original languageEnglish
Pages (from-to)2369-2378
Number of pages10
JournalOrganic Electronics
Volume14
Issue number9
DOIs
StatePublished - 2013

Keywords

  • 4-ethylenedioxythiophene)
  • Counter electrode
  • Dye-sensitized solar cell
  • Hexafluoro-isopropanol
  • Poly(3
  • Polyaniline
  • Solution process

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