Eur. Phys. J. Appl. Phys.
Volume 38, Number 3, June 2007
|Page(s)||247 - 252|
|Section||Laser and Optics|
|Published online||13 June 2007|
Structural and optical characteristics of CdS thin films deposited by infrared pulsed-laser technique
Physics Department, Faculty of Education, Ain Shams University, Heliopolis 11757, Cairo, Egypt
Corresponding author: Dr.A.Eldeeb@gmail.com
Revised: 4 April 2007
Accepted: 27 April 2007
Published online: 13 June 2007
The influence of preparation conditions on the structure and optical properties of cadmium sulphide (CdS) thin films deposited on quartz substrates by means of the pulsed laser technique have been investigated. Oriented growth of hexagonal CdS nanoparticulate film with the C-axis perpendicular to the plane of the surface has been achieved up to a film thickness of 220 nm. The results indicate that the heat treatment played an important role on both crystal structure and optical properties. The grain size and the crystallinity of the films were increased, as well as the optical energy gap (allowed direct transitions) was increased from 2.45 to 2.50 eV upon annealing. The dispersion of the refractive index of virgin and annealed films were estimated and explained using the Wemple-Didomenico (WD) single-oscillator model. The dispersion parameters and the free charge carrier concentrations were also estimated.
PACS: 61.10.Nz – X-ray diffraction / 78.20.Ci – Optical constants (including refractive index, complex dielectric constant, absorption, reflection and transmission coefficients, emissivity)
© EDP Sciences, 2007
Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.
Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.
Initial download of the metrics may take a while.