Strong Down-Conversion Emission of Sm³⁺ Doped Borotellurite Glass under 480 nm Excitation Wavelength

Abstract:

Tellurite glasses were generally applied in rare earth optical materials due to their excellent in physical and chemical properties. In this study, tellurite glasses composed of (70-x)TeO₂-20B₂O₃-10ZnO-xSm₂O₃ (x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %) were prepared by conventional melt-quenching technique. Some basic physical parameters such as density, molar volume and oxygen packing density as well as the optical analysis by mean of their absorption and emission spectra have been carried out at room temperature using UV/Vis and photoluminescence spectrophotometer. The result of physical properties are found to vary with respect to concentration of Sm³⁺ ions content. Meanwhile, three strong absorption peaks are observed and are well resolved in the ultra violet and visible regions due to transitions between the ground state and various excited state of Sm³⁺ ions. Under 480nm laser excitation, luminescence spectra exhibit four emission bands at 562 nm, 599 nm, 645 nm and 706 nm which corresponding to the transition ⁴G_5/2 → ⁶H_5/2, ⁴G_5/2 → ⁶H_7/2, ⁴G_5/2 → ⁶H_9/2 and ⁴G_5/2 → ⁶H_11/2 were observed. Some other results were also been analysed and presented.

• Periodical: Key Engineering Materials (Volume 705)
• Pages: 204-208
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.705.204
• Online since: August 2016
• Authors: Siti Nasuha Rafien, Azman Kasim, Azhan Hashim, S. Akmal Syamsyir, Mardhiah Abdullah, M.A. Naveed
• Keywords: Absorption, Borotellurite, Photoluminescence, Rare Earth

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