DOI: 10.11648/j.ajmp.20261503.16 ISSN: 2326-8891

Spectroscopic and Luminescence Properties of Sm 3+ Doped Lead Antimonate Glasses

Annapreddy Reddy, Kavuluri Pushpalatha, Barre Sriramudu, Ch. Chandrakala, Talla Mohan
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Sm 3+ doped PbO–Sb 2 O 3 glasses containing varying concentrations of Sm 2 O 3 (0–1.0 mol%) were synthesized using the conventional melt-quenching technique to investigate their structural, optical, and luminescent properties. The prepared glass samples were characterized through density measurements, optical absorption spectroscopy, photoluminescence, and infrared spectral studies. Density analysis revealed a gradual increase with increasing Sm 3+ concentration, accompanied by a decrease in interionic distance and an increase in field strength, indicating significant modifications in the local glass structure. Optical absorption spectra exhibited several well-defined bands in the visible and near-infrared regions corresponding to the characteristic f–f transitions of Sm 3+ ions, with absorption intensity increasing systematically with dopant concentration. Photoluminescence studies under 401 nm excitation showed intense emission bands originating from the 4 G 5/2 excited state of Sm 3+ ions, and the luminescence intensity was found to enhance with increasing Sm 2 O 3 content. Infrared spectral analysis confirmed the presence of SbO 3 pyramidal structural units along with PbO 4 groups, suggesting that PbO plays a dual role as both a network former and a network modifier within the glass matrix. The combined structural and spectroscopic results demonstrate that Sm 3+ doped lead antimonate glasses possess favorable optical and luminescent characteristics, making them promising materials for photonic and luminescent device applications.

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