Abstract
AbstractThe dielectric functions ϵ(ω) = ϵ1(ω) +i ϵ2(ω) of CuIn1+2nSe2+3n and CuGa1+2nSe2+3n (n = 2.5, 3.0, 3.5) have been determined in the photon energy range from 0.8 to 4.7 eV by spectroscopic ellipsometry. The measurements reveal distinct structures at energies of the critical points in the Brillouin zone. The structure observed in the spectral dependence of the dielectric functions, the complex refractive index, the absorption coefficient and the normal‐incidence reflectivity has been modelled using a modification of the Adachi's model. The results are in a good agreement with the experimental data over the entire range of photon energies. The model parameters (strength, threshold energy and broadening) have been determined using the simulated annealing algorithm. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
