The Role of Samarium Ion in Optical Properties of Magnesium Tellurite Glass Embedded with Silver Nanoparticles

Abstract:

A series of tellurite glass based on composition (89.6-x)TeO₂-10MgO-xSm₂O₃-0.4AgCl where 0.2x1.0 have successfully been prepared by melt-quenching technique. The optical behaviour has been examined as a function of Sm₂O₃ content by using UV-Visible Spectroscopy in the range of 200-900 nm. The absorption studies revealed that the indirect and direct optical energy band gap is in the range of 2.81-3.11 eV and 3.16-3.45 eV, respectively. Meanwhile, Urbach energy, E is in between 0.18-0.24 eV. The increasing in samarium ion up to 0.4 mol% of Sm₂O₃ result in an increment of optical energy band gap, but gradually decreases beyond 0.4 mol%. All the results will be discussed with respect to Sm₂O₃ content.

• Periodical: Advanced Materials Research (Volume 1107)
• Pages: 460-465
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1107.460
• Online since: June 2015
• Authors: M.Y. Nurulhuda, M.R. Sahar*
• Keywords: Optical Energy Band Gap, Samarium, Tellurite Glass, Urbach Energy

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