Optical absorption in As-Se glasses
- 1 January 1991
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 63 (1) , 15-31
- https://doi.org/10.1080/01418639108224428
Abstract
The optical absorption above the fundamental edge has been measured as a function of temperature for 15 compositions from Se to AsSe. The samples were thin films made by blowing bubbles from the melt. The optical gap has a minimum near As43Se57. Tauc plots for absorption at different temperatures but the same composition appear to converge to a single point. An unexpected linear relation is observed between composition and the inverse square of the slopes of the Tauc plots. An inverse correlation is observed between optical gap and the glass-transition temperature.Keywords
This publication has 25 references indexed in Scilit:
- Temperature dependence of the fundamental optical absorption edge in crystals and disordered semiconductorsSolid State Communications, 1989
- Disorder and the Optical-Absorption Edge of Hydrogenated Amorphous SiliconPhysical Review Letters, 1981
- The Exponential Absorption Edge in Amorphous Ge–Se CompoundsJapanese Journal of Applied Physics, 1979
- Transport properties and electronic structure of glasses in the arsenic-selenium systemPhilosophical Magazine, 1976
- Effects of Densification on Electrical and Optical Properties of Chalcogenide GlassesJapanese Journal of Applied Physics, 1973
- Compositional Trends in the Optical Properties of Amorphous Lone-Pair SemiconductorsPhysical Review B, 1973
- Nature of the band-edge electronic states in As-Te semiconducting glassesPhilosophical Magazine, 1973
- Toward a Unified Theory of Urbach's Rule and Exponential Absorption EdgesPhysical Review B, 1972
- Optical absorption, transport and photoconductivity in amorphous seleniumJournal of Non-Crystalline Solids, 1970
- Optical Absorption by Excitons in Amorphous SeleniumPhysical Review B, 1967