Determination of optical conductivity and different optical energy losses for non-crystalline Vanadyl tetra tert-butyl 2,3 Naphthalocyanine thinfilms

Abstract

Amorphous Vanadyl Tetra Tert Butyl 2, 3 naphthalocyanine thin films (VTTBNc) have been deposited using Physical Vapor Deposition technique. By analyzing the X‐ray diffraction, the structure of as deposited films is found to be non‐crystalline. Different optical properties of these thin films have been investigated by means of optical absorption and reflection spectra. Various optical constants like band gap energy, Eg the width of band tails of localized states into the gap, EU and steepness parameter, β gets calculated and the variation of different optical parameters like refractive index, extinction coefficient, dielectric constants, optical conductivity and surface and volume energy losses with photon energy are estimated.