PHOTOINDUCED OPTICAL-CHANGES IN AMORPHOUS SE AND GE-SE FILMS

Authors
TICHY L TICHA H NAGELS P CALLAERTS R
Citation
L. Tichy et al., PHOTOINDUCED OPTICAL-CHANGES IN AMORPHOUS SE AND GE-SE FILMS, Journal of non-crystalline solids, 240(1-3), 1998, pp. 177-181
Citations number
13
Categorie Soggetti
Material Science, Ceramics
Journal title
Journal of non-crystalline solids → ACNP
ISSN journal
00223093
Volume
240
Issue
1-3
Year of publication
1998
Pages
177 - 181
Database
ISI
SICI code
0022-3093(1998)240:1-3<177:POIASA>2.0.ZU;2-3
Abstract
Films of amorphous Se, Ge15Se85, and Ge25Se75 were prepared by thermal evaporation. Measurements of photodarkening at 78 K showed that the o ptical gap (E-g) and the slope of optical absorption edge (B) are inte rcorrelated. The correlation between the photoinduced changes of E-g a nd B is discussed within both the: model of Davis and Mott and Tauc's model for optical transitions in amorphous solids. (C) 1998 Elsevier S cience B.V. All rights reserved.