PHOTOINDUCED RING-TO-CHAIN CONVERSION IN AS-EVAPORATED FILMS OF AMORPHOUS SELENIUM

Authors
ROY A KOLOBOV A OYANAGI H TANAKA K
Citation
A. Roy et al., PHOTOINDUCED RING-TO-CHAIN CONVERSION IN AS-EVAPORATED FILMS OF AMORPHOUS SELENIUM, Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic, 78(1), 1998, pp. 87-94
Citations number
24
Categorie Soggetti
Physics, Applied",Mechanics,"Physics, Condensed Matter","Material Science
Journal title
Philosophical magazine. B. Physics of condensed matter.Statistical mechanics, electronic, optical and magnetic → ACNP
ISSN journal
13642812
Volume
78
Issue
1
Year of publication
1998
Pages
87 - 94
Database
ISI
SICI code
1364-2812(1998)78:1<87:PRCIAF>2.0.ZU;2-U
Abstract
Results of an in-situ extended X-ray absorption fine-structure study o f photostructural changes in films of amorphous selenium are reported. It is shown that at first the average coordination number decreases b y about 10%. As time elapses, the initial coordination number is resto red. This change is attributed to breaking of ring-like structural fra gments with subsequent formation of longer chains. This model is suppo rted by a Raman scattering experiment demonstrating the disappearance upon photoexcitation of a peak at about 112 cm(-1) characteristic of r ings.