Influence of Samarium on the Optical Response of Zinc Phosphate Glass

Abstract:

Samarium doped zinc phosphate glasses of the form 40ZnO-(60-x) P₂O₅-xSm₂O₃, with 1.0 ≤ x ≤ 5.0 mol% were prepared using the melt quenching method. The XRD patterns confirmed the amorphous nature of the glass. The Archimedes method was used to measure the density, which was used to calculate the molar volumes. The density was found to vary in the range of 2.839 to 3.138 gm/cm³ while the molar volume varied between 40.80 and 42.21cm³/mol. The effect of samarium on the optical absorption and emission characteristics were examined. The absorption spectra exhibit two dominant absorption peaks corresponding to the transitions from ⁶H_5/2 ground state to ⁴I_11/2 and ⁴F_7/2 excited states, respectively. Photoluminescence emission consisting of ⁴G_5/2 à ⁶H_5/2, ⁶H_7/2, ⁶H_9/2 and ⁶H_11/2 transitions display significant enhancement with the increase of Sm³⁺ concentration up to 3.0 mol% followed by a rapid quenching beyond this concentration which is ascribed to the nonradiative energy transfer and multi-phonon relaxation processes.

• Periodical: Advanced Materials Research (Volume 1107)
• Pages: 403-408
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1107.403
• Online since: June 2015
• Authors: Siti Amlah Mohamad Azmi, M.R. Sahar*, Ramli Arifin, Sib Krishna Ghoshal
• Keywords: Absorption, Photoluminescence (PL), Quenching, Samarium

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