PEDOT:PSS films with significantly enhanced conductivities induced by preferential solvation with cosolvents and their application in polymer photovoltaic cells

When a PEDOT:PSS film prepared from the PEDOT:PSS aqueous solution was treated with water or a common organic solvent like ethanol, iso-propyl alcohol, acetonitrile, acetone, or tetrahydrofuran, its conductivity did not change remarkably

Yijie Xia; Jianyong Ouyang

2011

Scholarcy highlights

  • The conductivity of poly(3,4-ethylene dioxythiophene):poly(styrene sulfonate) films was significantly enhanced by preferential solvations of the hydrophobic PEDOT and hydrophilic PSS chains with cosolvents
  • When a PEDOT:PSS film prepared from the PEDOT:PSS aqueous solution was treated with water or a common organic solvent like ethanol, iso-propyl alcohol, acetonitrile, acetone, or tetrahydrofuran, its conductivity did not change remarkably
  • The conductivity was significantly enhanced when the PEDOT:PSS film was treated with a cosolvent of water and one of these common organic solvents
  • The conductivity enhancement was affected by several factors, including the ratio of the organic solvent to water, the dielectric constant of the organic solvent, and the temperature during the treatment
  • The significant conductivity enhancement is attributed to the preferential solvation of PEDOT:PSS with a cosolvent
  • PEDOT:PSS films with significantly enhanced conductivities induced by preferential solvation with cosolvents and their application in polymer photovoltaic cells

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