Polythiophene (PT) films were electropolymerized using pulse currents in aqueous solutions on Indium Tin Oxide coated glass substrates. The effects of parameters like peak current density, pulsating frequency and duty cycle on the electrochemical, morphological and structural properties of PT films were investigated. Electrochemical impedance spectroscopy, cyclic voltammetry, chronoamperometry, electron microscopy and infra-red spectroscopy techniques were employed to study the pulse electropolymerized PT films and the results were compared with those of galvanostatically electropolymerized films. An increase in the peak current density or using higher pulsating frequency/smaller duty cycle at the same average current density during electropolymerization led to deposition of finer PT structure which enhance apparent diffusion through the films and increase their electroactivity. The results of infra-red spectroscopy showed that applying a pulse current during PT electropolymerization does not alter polythiophene bounding structure except changes in the intensity of the peaks contributed to the doping level of the films. (C) 2013 Elsevier Ltd. All rights reserved.