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E-Journal of Chemistry
Volume 8, Issue 4, Pages 1686-1695
http://dx.doi.org/10.1155/2011/752982

Effect of Thickness on Structural and Optical Properties of Tetra-tert- butyl-2, 3-naphthalocyanine Thin Films

I. Dhanya and C S Menon

School of Pure and Applied Physics, Mahatma Gandhi UniversityPriyadarshini Hills, Kottayam, Kerala, 686 560, India

Received 19 February 2011; Accepted 16 April 2011

Copyright © 2011 Hindawi Publishing Corporation. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Amorphous tetra-tert-butyl-2, 3-naphthalocyanine thin films have been deposited using physical vapor deposition technique under a varied thickness by adjusting the coating time. 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.