SURFACE AND STRUCTURAL MODIFICATION OF SPRAYED (PPy)/ZnO NANOPARTICLES COMPOSITE FILMS AND THE FEASIBILITY STUDY OF HYBRID

DBSA doped soluble polypyrrole was prepared by insitu chemical polymerization. (PPy)/ZnO composite films were coated at different temperatures 150 ˚C, 200˚C and 300˚C by spray pyrolysis technique with various weight ratio of ZnO (1:1), (1:2) and (1:3). It was found that (PPy)/ZnO films coated at 300˚C were found to be good. The atomic percentage of the films was analyzed by EDAX spectrum. The changes manifested on the polymer surface and in the mechanical properties were studied with respect to surface wettability. The PPy doped ZnO composite film was formed to have a c hydrophobic to a hydrophilic state. The SEM study shows cracks and gaps in the surface of (PPy)/ZnO films. A hexagonal structure (PPy)/ZnO composite film was confirmed by X diffraction pattern. FTIR spectrum reveals that the intensity of polypyrrole decreases with the addition of ZnO content. The absorption of PPy and (PPy)/ZnO composite film at 360 nm and 380 nm was confirmed by UV spectroscopy. Photoluminescence study shows that the direct band energies of the PPy and (PPy)/ZnO composite films with different weight ratios are found to be 2.8eV and 3.29eV, 3.28eV and 3.27eV. It was found that the (PPy)/ZnO composite films had a (p-n) hybrid solar cells behavior was studied by I and conductivity measurements.