Platinum (Pt) as a precious metal has high photoelectric response as it is highly conducting and electroactive material used as a counter electrode in dye sensitized solar cell (DSSC). Herein, polyaniline (PANI) is synthesized by simple oxidative polymerization approach and is used as a counter electrode in DSSC. The performance of PANI coated on FTO counter electrode is evaluated by varying the thickness of film prepared by spin coating and doctor blade techniques. It is found that PANI-3 (20 mg concentration) counter electrode demonstrated enhanced redox activity using redox couple Ferricyanide analyte in 0.1 M KCl as an electrolyte as compared to its counter electrodes. The structural, morphological and optical properties of PANI were confirmed by X-ray diffraction (XRD), field emission scanning electron microscope (FESEM), high-resolution transmission electron microscope (HRTEM), UV-vis spectrophotometer and Fourier transform infrared spectroscopy (FT-IR). The photovoltaic performance of fabricated electrodes for DSSCs was examined by linear swap voltammetry LSV and cyclic voltammetry (CV). It was found that unaided PANI-3 counter electrode showed good electro catalytic activity which was approaching to the catalytic activity of commercially available Pt. By doping PANI with some other metal and metal oxide materials the catalytic activity and efficiency can be enhanced.