Defects in chalcogenide glasses I. The influence of thermally induced defects on transport in a-As2Se3
- 1 February 1980
- journal article
- research article
- Published by Taylor & Francis in Philosophical Magazine Part B
- Vol. 41 (2) , 191-207
- https://doi.org/10.1080/13642818008245380
Abstract
The transport properties of a-As2Se3 evaporated onto substrates held near room temperatures have been examined. The hole transit time in these samples is increased by more than one order of magnitude with respect to samples prepared on substrates held close to Tg∼ 458 K. This increase is due to an increased density of traps which are isoenergetic with the traps limiting transport in the annealed glass. The additional traps in the non-equilibrium samples anneal on heating following a sequence of at least two relaxation processes characterized by 1 . 0 and 0 . 57 eV activation energies. The properties of non-equilibrium a-As2Se3 resemble those of equilibrium glasses with compositions departing slightly from stoichiometry.Keywords
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