Abstract
Herein, we study how the introduction of secondary dopants, ionic liquids (ILs) into an aqueous-processable conducting polymer (CP), PEDOT:PSS [poly(3,4-ethylenedioxythiophene) doped with poly(4-styrenesulfonate)] affects the PEDOT:PSS dispersion states in the solution, based on dynamic light-scattering analysis. We also investigate the electrical characteristics of PEDOT:PSS/IL films that are processed from the composite blends with varied IL concentration. As a result, we found that the addition of ILs causes growths of PEDOT:PSS dispersions, and there is a relationship between IL-induced dispersion growths and electrical conductivity enhancement. This work could provide a basis for achieving outstanding electrical performance from aqueous-processable CPs.
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