Title
Temperature dependence of the optical gap in thin amorphous films of <tex>$As_{2}S_{3}$</tex>, <tex>$As_{2}Se_{3}$</tex> and other basic non-crystalline chalcogenides Temperature dependence of the optical gap in thin amorphous films of <tex>$As_{2}S_{3}$</tex>, <tex>$As_{2}Se_{3}$</tex> and other basic non-crystalline chalcogenides
Author
Faculty/Department
Faculty of Applied Economics
Publication type
article
Publication
New York, N.Y. ,
Subject
Physics
Chemistry
Source (journal)
The journal of physics and chemistry of solids. - New York, N.Y.
Volume/pages
61(2000) :4 , p. 545-550
ISSN
0022-3697
ISI
000085842100008
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Affiliation
University of Antwerp
Abstract
Optical transmittivity in the UV-VIS region of thermally evaporated amorphous As2S3, and As2Se3 thin films was measured in the temperature region 15 K < T less than or equal to 300 K. The temperature dependence of the optical gap (E-g(T)) was found to be in agreement with Fan's one-phonon approximation or with Cody's one-oscillator model. The parameters necessary to describe the E-g(T) dependences for non-crystalline Se, As2S3, As2Se3, GeS2 and GeSe2, according to a simple linear relation, Varshni's relation, and Fan's or Cody's model are summarized. (C) 2000 Elsevier Science Ltd. All rights reserved.
E-info
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