Staff Members - Benha University
COMPOSITION DEPENDENCE OF SOME OPTICAL PARAMETERS OF Ge(10+x) Se40 Te(50-x) AMORPHOUS SYSTEM
Al - Azhar Bulletin of Science • 1995
Publication Information
Authors
M.M. EL Okr, T. Bayomy, F. Metawe, S.A. Fayek, A.S. Hassanien
Keywords
Thin films, Thermal evaporation, Optical parameters, Amorphous, Cohesive energy
Journal
Al - Azhar Bulletin of Science
Publisher
Al-Azhar University
Volume
6
Issue
2, Dec.
Pages
1357-l365
publication.type
International
Paper Link
Not Available
Supplementary Materials
Not Available
Abstract
Thin films of thickness 200 nm from the ternary glassy Ge(10+x) Se40 Te(50-x) systems (x = 16.65, 13.35, and zero) have been prepared in amorphous state. The optical energy gap Eo and
band tail width Ee have been estimated using reflection (R) and transmission (T) measurements of films. Eo and Ee are dependent on the composition. Increasing of Te content leads to decreasing Eo and increasing Ee. The cohesive energies of investigated samples have been calculated. The obtained results have been discussed in the frame of chemical bond approach model
band tail width Ee have been estimated using reflection (R) and transmission (T) measurements of films. Eo and Ee are dependent on the composition. Increasing of Te content leads to decreasing Eo and increasing Ee. The cohesive energies of investigated samples have been calculated. The obtained results have been discussed in the frame of chemical bond approach model