Optical properties of Cu3In5S9 single crystals by spectroscopic ellipsometry

Date

2018-01-01

Author

Işık, Mehmet
Nasser, H.
Ahmedova, F.
Guseinov, A.
Hasanlı, Nızamı

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

166
views

0
downloads

Cu3In5S9 single crystals were investigated by structural methods of x-ray diffraction and energy dispersive spectroscopy and optical techniques of ellipsometry and reflection carried out at room temperature. The spectral dependencies of optical constants; dielectric function, refractive index and extinction coefficient, were plotted in the range of 1.2-6.2 eV from ellipsometric data. The spectra of optical constants obtained from ellipsometry analyses and reflectance spectra presented a sharp change around 1.55 and 1.50 eV, respectively, which are associated with band gap energy of the crystal. The critical point (interband transition) energies were also found from the analyses of second-energy derivative of real and imaginary components of dielectric function. The analyses indicated the presence of four critical points at 2.73, 135, 4.04 and 4.98 eV.

Subject Keywords

Ellipsometry, Optical properties, Semiconductors

URI

https://hdl.handle.net/11511/46419

Journal

OPTIK

DOI

https://doi.org/10.1016/j.ijleo.2018.06.056

Collections

Department of Physics, Article

Suggestions

OpenMETU
Core

Optical characterization of Ga2SeS layered crystals by transmission, reflection and ellipsometry IŞIK, MEHMET; Hasanlı, Nızamı (2015-07-10) Optical properties of Ga2SeS crystals grown by Bridgman method were investigated by transmission, reflection and ellipsometry measurements. Analysis of the transmission and reflection measurements performed in the wavelength range of 400-1100 nm at room temperature indicated the presence of indirect and direct transitions with 2.28 eV and 2.38 eV band gap energies. Ellipsometry measurements were carried out in the 1.2-6.0 eV spectral region to get information about optical constants, real and imaginary part...
Optical characterization of CuIn5S8 crystals by ellipsometry measurements IŞIK, MEHMET; Gasanly, Nizami (2016-04-01) Optical properties of CuIn5S8 crystals grown by Bridgman method were investigated by ellipsometry measurements. Spectral dependence of optical parameters; real and imaginary parts of the pseudodielectric function, pseudorefractive index, pseudoextinction coefficient, reflectivity and absorption coefficients were obtained from the analysis of ellipsometry experiments performed in the 1.2-6.2 eV spectral region. Analysis of spectral dependence of the absorption coefficient revealed the existence of direct ban...
Optical properties of TlGaxIn1-xSe2-layered mixed crystals (0.5 <= x <= 1) by spectroscopic ellipsometry, transmission, and reflection IŞIK, MEHMET; Delice, S.; Hasanlı, Nızamı (2014-01-01) The layered semiconducting TlGaxIn1-xSe2-mixed crystals (0.5 <= x <= 1) were studied for the first time by spectroscopic ellipsometry measurements in the 1.2-6.2 eV spectral range at room temperature. The spectral dependence of the components of the complex dielectric function, refractive index, and extinction coefficient were revealed using an optical model. The interband transition energies in the studied samples were found from the analysis of the second-energy derivative spectra of the complex dielectri...
Refractive index and oscillator parameters in TlGaS2, TlGaSe2 and TlInS2 layered crystals Hasanlı, Nızamı (2011-01-01) The optical properties of TlGaS2, TlGaSe2, and TlInS2 crystals have been investigated through the transmission and reflection measurements at room temperature in the wavelength range of 400-1100 nm. These measurements allowed determination of spectral dependence of the refractive index for all crystals studied. The dispersion of the refractive index is discussed in terms of the Wemple-DiDomenico single-effective-oscillator model. The refractive index dispersion parameters: the oscillator energies, the dispe...
Temperature-dependent optical properties of GaSe layered single crystals IŞIK, MEHMET; TUĞAY, EVRİN; Gasanly, N. M. (2016-01-01) Optical properties of GaSe single crystals have been investigated using temperature-dependent transmission and room temperature reflection measurements in the wavelength range of 380-1100nm. The analysis of the absorption data at room temperature showed the existence of indirect transitions in the crystal with energy band gap of 1.98eV. Temperature dependence of the transmission measurements revealed the shift of the absorption edge toward lower energy as temperature is increased from 10 to 280K. The rate o...

Citation Formats

M. Işık, H. Nasser, F. Ahmedova, A. Guseinov, and N. Hasanlı, “Optical properties of Cu3In5S9 single crystals by spectroscopic ellipsometry,” OPTIK, pp. 77–82, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/46419.