Electrical Characterization of Polythiophene Composite Thin Films with Iodine as Dopant
Keywords:
Poly(vinyl acetate) (PVAc), Polythiophene (PTh), Iodine, dc.Abstract
Synthesis of polymer composites poly (vinyl acetate) (PVAc) and polythiopene (PTh) was done by chemical oxidative method using ferric chloride oxidant in methanol with Iodine as a dopant. The dc conductivity as a function of temperature (313-363 K) was measured by two probe method. The maximum value for dc electrical conductivity was found for 10.4 wt % (σ = 9.78x10-10 S/cm).The decrease in conductivity for more Iodine concentration may be due to reduced segmental motion. The temperature dependence conductivity shows percolative behavior and clear cross over from Vogel-Tamman-Fulcher (VTF) to Arrhenius behavior. Ionic conduction was found to be decreased with increase in concentration of Iodine which shows ionic charge transport.
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