Optical Absorption of Chalcogenide Glass Ga2S3-La2S3 Doped with Erbium
Journal Title: Фізика і хімія твердого тіла - Year 2017, Vol 18, Issue 3
Abstract
The glasses of the La2S3-Er2S3-Ga2S3 system were synthesized from the melted samples which where quenched in to the cold 25% solution of NaCl. Their optical absorption spectra were studied in the range of 1.2–2.9 eV at 80 K. For doped erbium glasses, there are narrow absorption bands with maxima at 2.53, 2.35, 2.27, 1.88, 1.54, 1.26 eV. With increasing of the content of La2S3 (30 - 40 mol. %) the bandgap width decreases (Eg = 2.83 - 2.73 eV) and the Urbach parameter increases (E = 151 - 238 meV). These changes are determined by the structural disorder in the glasses.
Authors and Affiliations
V. V. Halyan, A. H. Kevshyn, I. A. Ivashchenko, I. D. Olekseuk, I. V. Danyliuk, G. P. Shavarova
Keywords
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- EP ID EP263251
- DOI 10.15330/pcss.18.3.342-346
- Views 80
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