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Structural and Optical Properties of Ga2Se3 Crystals by Spectroscopic Ellipsometry

  • I. GulerEmail author
  • M. Isik
  • N. M. Gasanly
  • L. G. Gasanova
  • R. F. Babayeva
Article
  • 6 Downloads

Abstract

Optical and crystalline structure properties of Ga2Se3 crystals were analyzed utilizing ellipsometry and x-ray diffraction (XRD) experiments, respectively. Components of the complex dielectric function (ε = ε1 + iε2) and refractive index (N = n + ik) of Ga2Se3 crystals were spectrally plotted from ellipsometric measurements conducted from 1.2 eV to 6.2 eV at 300 K. From the analyses of second-energy derivatives of ε1 and ε2, interband transition energies (critical points) were determined. Absorption coefficient–photon energy dependency allowed us to achieve a band gap energy of 2.02 eV. Wemple and DiDomenico single effective oscillator and Spitzer–Fan models were accomplished and various optical parameters of the crystal were reported in the present work.

Keywords

Semiconductors optical properties optical constants critical points 

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© The Minerals, Metals & Materials Society 2019

Authors and Affiliations

  1. 1.Physics, Inter-Curricular Courses DepartmentÇankaya UniversityAnkaraTurkey
  2. 2.Department of Electrical and Electronics EngineeringAtilim UniversityAnkaraTurkey
  3. 3.Department of PhysicsMiddle East Technical UniversityAnkaraTurkey
  4. 4.Department of PhysicsBaku State UniversityBakuAzerbaijan
  5. 5.Department of Physics and ChemistryAzerbaijan State University of EconomicsBakuAzerbaijan

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