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Determination and analysis of dispersive optical constants of some organic thin films

Y. KAYA1, A. PEKSOZ2,* , G. IREZ1, G. KAYNAK2

Affiliation

  1. Uludag University, Department of Chemistry, Bursa, 16059,Turkey
  2. Uludag University, Department of Physics, Bursa, 16059, Turkey

Abstract

The optical behaviour of the complexes of (2E)-3-aza-1-(hydroxyimino)-2,4-diphenylpent-2-ene (HL) was investigated by optical reflectance and transmittance measurements. The optical constants (refractive index, n; extinction coefficient, k and dielectric constant, e) of some organic thin films were determined using reflectance and transmittance spectra. The optical absorption studies show that the transition is direct with band gap energy values, which are calculated. Analysis of the basis absorption spectra was also carried out to determine optical band gap (Eg) and Urbach parameter (E0). The analysis of the optical absorption data revealed optical direct transition with band gaps of 3.7-3.9 eV. A surface observation of these thin films was also carried out by an Atomic Force Microscope..

Keywords

Optical band gaps, Urbach parameter, Atomic Force Microscope.

Submitted at: April 7, 2010
Accepted at: April 26, 2010

Citation

Y. KAYA, A. PEKSOZ, G. IREZ, G. KAYNAK, Determination and analysis of dispersive optical constants of some organic thin films, Journal of Optoelectronics and Advanced Materials Vol. 12, Iss. 4, pp. 948-952 (2010)