The Effect of Metal Dopants on Photodarkening Kinetics in Amorphous AsSe and As2Se3 Thin Films

✍ Scribed by Iovu, M.S. ;Shutov, S.D. ;Rebeja, S.Z. ;Colomeyco, E.P. ;Popescu, M.

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 115 KB
• Volume: 181
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/1521-396x(200010)181:2<529::aid-pssa529>3.0.co;2-d

✦ Synopsis

Photodarkening relaxation under light exposure of a-As 2 Se 3 amorphous films doped with 0.5 at.% of metals Sn, Mn, Sm or Dy and a-AsSe films doped with Sn up to 10.0 at.% Sn was studied in dependence on the impurity and thermal treating. Both factors reduce photodarkening and the degree of reduction depends on the type of impurity. The relaxation process may be described by a stretched exponential with the dispersion parameter 0.4 a < 1 and time constant increasing with embedding of impurity or thermal annealing. The results are discussed in the frame of the recently forwarded ``slip-motionº model of photodarkening in chalcogenide glasses.