Temperature dependence of the optical gap in thin amorphous films of As2S3, As2Se3 and other basic non-crystalline chalcogenides

Authors
Ticha, H Tichy, L Nagels, P Sleeckx, E Callaerts, R
Citation
H. Ticha et al., Temperature dependence of the optical gap in thin amorphous films of As2S3, As2Se3 and other basic non-crystalline chalcogenides, J PHYS CH S, 61(4), 2000, pp. 545-550
Citations number
23
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
ISSN journal
00223697 → ACNP
Volume
61
Issue
4
Year of publication
2000
Pages
545 - 550
Database
ISI
SICI code
0022-3697(200004)61:4<545:TDOTOG>2.0.ZU;2-V
Abstract
Optical transmittivity in the UV-VIS region of thermally evaporated amorpho us 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 approximat ion or with Cody's one-oscillator model. The parameters necessary to descri be the E-g(T) dependences for non-crystalline Se, As2S3, As2Se3, GeS2 and G eSe2, 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 r eserved.