We developed an organic-inorganic solar cell configuration based on nanocomposite Polyaniline-Multi Walled Carbon Nanotubes /gold particles/ Si, and the PV performance was compared between in presence or absence of plasmonics phenomena by deposing gold nanoparticles on n-type Si and deposited PANI-MWNTs layer on the top of n-type Si substrate. The gold particles deposited by atomic layer deposition on the top of n-Si, significantly increase the voltage and fill factor relative to devices without gold particles. The efficiency and fill factor of the solar cell with gold particles are (0.28%, 0.311) higher than solar cell without using plasmonics phenomena (0.073, 0.275).