Full-text resources of PSJD and other databases are now available in the new Library of Science.
Visit https://bibliotekanauki.pl

Refine search results

Journals help

  1. 1 Acta Physica Polonica A

Years help

  1. 1 2001

Authors help

  1. 1 Metwally H.

Preferences help
Polish version English version Language
enabled [disable] Abstract
Number of results

Results found: 1

Number of results on page
first rewind previous Page / 1 next fast forward last

Search results

help Sort By:

help Limit search:
first rewind previous Page / 1 next fast forward last
1
Publication available in full text mode
Content available

Electrical and Optical Studies in Ge_{100-x}S_x Chalcogenide Thin Films

100%
Metwally H.
Acta Physica Polonica A
|
2001
|
vol. 99
|
issue 6
683-690
EN
Thin films of Ge_{100-x}S_x with different values of x are deposited on quartz substrates by a conventional thermal evaporation technique. The electrical conductivity of these films was measured. The experiments reveal that the electronic conduction is strongly composition dependent and is thermally activated with a single activation energy for x>40. A variable range hopping conduction mechanism seems to dominate when x=16 and 27. The optical absorption of the films is investigated using spectrophotometric measurements of the transmittance and reflectance in the wavelength range 200-3000 nm. All the studied compositions obey the Tauc relation concerning the non-direct transitions. The optical energy gap E_g value increases with the increase in chalcogen content x. The Urbach parameter E_0 decreases from 310 meV to 149 meV as x increases from 16 to 70.
first rewind previous Page / 1 next fast forward last
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.