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 SM ISO690:2012LEVCENKO, Sergiu, SYRBU, Nicolae, TEZLEVAN, Victor, ARUSHANOV, Ernest, DOKA-YAMIGNO, S, SCHEDEL-NIEDRIG, Thomas, LUX-STEINER, Martha Ch. H.. Optical spectra and energy band structure of single crystalline CuGaS 2 and CuInS2. In: Journal of Physics Condensed Matter, 2007, vol. 19, pp. 1-2. ISSN 0953-8984. DOI: https://doi.org/10.1088/0953-8984/19/45/456222 |
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  Journal of Physics Condensed Matter |
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| Volumul 19 / 2007 / ISSN 0953-8984 /ISSNe 1361-648X | ||||||
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| DOI:https://doi.org/10.1088/0953-8984/19/45/456222 | ||||||
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The reflection spectroscopy of chalcopyrite CuGaS2 and CuInS2 single crystals has been applied for light polarized perpendicular () and parallel () to the optical axis in the photon energy range between 1.5 and 6eV at 77K. By using the Kramers-Kronig relations, the spectral dependences of the real ε1 and imaginary ε2 components of the complex dielectric function ε(E) = ε1(E) +iε2(E) have been calculated for the investigated materials. As a result, the energy band structure of CuGaS2 and CuInS2 at photon energies higher than the fundamental band gap is derived from the analysis of the structures observed in ε(ω) spectra. Additionally, the spectral dependences of the complex refractive index, extinction coefficient and absorption coefficient s of CuGaS2 and CuInS2 single crystals are determined in the 1.5-6eV photon energy range |
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| Cuvinte-cheie Engineering controlled terms Band structure, Copper compounds, Emission spectroscopy, Gallium compounds, Light polarization, Photons Engineering uncontrolled terms Chalcopyrite, Complex dielectric function, Extinction coefficient, Fundamental band gap, Reflection spectroscopy Engineering main heading Single crystals |
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