NDLI: Compositional Dependence of the Optical Properties of Amorphous Semiconducting Glass Se$_{80}$Ge$_{20−x }$Cd$

Content Provider	Springer Nature Link
Author	Hegab, N. A. Farid, A. S. Shakra, A. M. Afifi, M. A. Alrebati, A. M.
Copyright Year	2016
Abstract	Se$_{80}$Ge$_{20−x }$Cd$_{ x }$ (0 ≤ x ≤ 12 at.%) compositions were prepared by a quenching technique. Thin films of the obtained compositions were deposited on dry clean glass substrates by a thermal evaporation technique. The chemical composition of the film samples have been determined by energy dispersive x-ray spectroscopy (EDX). X-ray diffraction measurements showed the amorphous nature of the studied films. The optical constants (n, k) were determined for the studied films using spectrophotometric measurements of transmittance T(λ) in the wavelength range (350 nm to 2500 nm), and using Swanepoel’s method. The values of the dispersion energy E $_{d}$, oscillator energy E $_{o}$, the lattice dielectric constant ε $_{ ∞L }$ and the high-frequency dielectric constant ε $_{s}$ were determined. The optical band gap $$ E_{g}^{\rm{opt}} $$ is estimated for all compositions from the absorption coefficient α. The analysis of the optical absorption data revealed the existence of allowed indirect transitions for all compositions. The effect of adding Cd content on the obtained optical parameters was also discussed.
Starting Page	3332
Ending Page	3339
Page Count	8
File Format	PDF
ISSN	03615235
Journal	Journal of Electronic Materials
Volume Number	45
Issue Number	7
e-ISSN	1543186X
Language	English
Publisher	Springer US
Publisher Date	2016-04-12
Publisher Place	New York
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Chalcogenide glasses optical properties Se-Ge-Cd Optical and Electronic Materials Characterization and Evaluation of Materials Electronics and Microelectronics, Instrumentation Solid State Physics
Content Type	Text
Resource Type	Article
Subject	Materials Chemistry Electronic, Optical and Magnetic Materials Condensed Matter Physics Electrical and Electronic Engineering

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