Synthesis, morphology and optical properties of nanocomposite thin films based on polypyrrole-bromo-aluminium phthalocyanine

This paper is focused on the synthesis of nanocomposite Polypyrrole–Bromoaluminium phthalocyanine (PPy-BrAlPc). Morphology of prepared nano-compositethin films by electron beam evaporation technique have been well characterized by Field Emission-Scanning Electron Microscopy (FESEM). FESEM shows that the grain sizes are increased with increase in concentration of pyrrole. The optical properties of nanocomposite thin films have been investigated using a spectrophotometric measurement of absorbance in the wavelength range 300–800 nm. Absorption spectra of the films show B-band in the UV region followed by Q-band in the visible region. Moreover, the optical band gaps of the thin films are evaluated. It is found that the energy of the optical band gap increases as the concentration of Bromo-aluminium phthalocyanine increases.