Giant dielectric constant and low loss tangent in polypyrrole doped with dodecylbenzene sulfonic acid

Soluble in organic solvent polypyrrole was prepared using dodecylbenzene sulfonic acid as a functional dopant. The dielectric constant was measured as high as 1.6 × 104 at 100 Hz and 450 K with very low dissipation factor. This thermally activated relaxation process plays a dominant role for the low frequency dielectric response. It is suggested that this dipolar polarization may mainly originate from the hopping of charge carriers between localized sites over the potential barriers.