Spectral optoelectronic features of Cu-containing arsenic sulfide (As2S3)0.95Cu0.05

Abstract

Chalcogenide amorphous thin films of the modification (As 2 S 3 ) 0.95 Cu 0.05 were prepared using a thermal evaporation technique. The optical properties of the resultant films were investigated based on the transmittance spectra in the photon energy range 1.6-2.82 eV. Thicknesses of the films under study were determined using the envelope technique based on the transmittance spectra. The optical measurements were carried out over the conditional temperature extending from 77 to 300 K. The results of the mentioned measurements are conductive tools in investigating the electronic structures of the Chalcogenide Glasses, however the analysis of the experimental results provide information about the optical gap width and elucidate the broadness of the band tail that may disturb the band gap edges. Moreover, the single-effective oscillator was implemented in calculating both the oscillation and dispersion energies of the films under investigation. The static refractive index and the static dielectric constant were also determined for these films.

Ab Initio Investigation of Electronic and Optical Properties of Cu‐Doped As2S3

“…The corresponding values for configuration Cu 0.25 As 2 S 3 are 9.5, 10.6, and 11.5, respectively, and the average value is 10.5. The experiments [ 7 ] show that ε 1 (0) for Cu 0.05 (As 2 S 3 ) 0.95 configuration with 1 at% Cu concentration is between 1.636 and 2.449 at different temperatures. However, the calculated average value of ε 1 (0) with 2.4 and 4.8 at%.…”

“…Badr et al [ 7 ] investigated the optical properties of thin films of (As 2 S 3 ) 0.95 Cu 0.05 in the photon energy range 1.6–2.82 eV and observed that Cu causes a decrease in the optical bandgap and the gap decreases with the increase in temperature. Ubale et al [ 8 ] found that the electrical resistivity, activation energy, and optical bandgap decrease with Cu doping in As 2 S 3 thin films and these thin films exhibit n‐type conductivity.…”