Abstract
In the present work, thin films of Lead (II) tetrakis (4-cumylphenoxy) phthalocyanine (Pb (II) Pc) of different thicknesses ranging from 15 to 90 nm were deposited by physical vapor deposition (PVD) under a residual air pressure less than 10−6 mbar on glass and cellulose acetate polymer based transparent flexible sheets (CA), at room temperature (25 °C). The prepared films were characterized for structural, morphological and optical properties using X -ray diffraction (XRD), Atomic Force Microscopy (AFM) and UV–Vis spectroscopy techniques. The dielectric studies were performed to calculate the mobility of charge carriers and to identify the conduction mechanism in Pb (II) Pc films. The films exhibited a changeover from semi-crystalline to highly crystalline structure on changing the substrate from glass to CA. Pb (II) Pc films deposited on CA substrate exhibited enlarged porosity, larger surface area active sites for absorption and higher charge carrier mobility relative to glass substrates; which further increases with increasing film thickness.
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