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<p>The present work focuses on understanding the structure of Sm<sup>3+</sup> doped SiO<sub>2</sub> in sol-gel glass and evaluating the efficiency and color rendering quality of the prepared samples. The properties of the glass were investigated using various characterization techniques, such as an Abbe refractometer. The Judd–Ofelt (JO) parameters were computed from the observed absorption spectra. XRD analysis confirmed the amorphous nature of the prepared glass. FTIR spectra indicated that the number of OH groups and organic residues in the silica can be significantly reduced by high-temperature heat treatment. The PL spectra revealed four emission bands corresponding to the transition <sup>4</sup>G<sub>5/2</sub>→<sup>6</sup>H<sub>5/2</sub>, <sup>4</sup>G<sub>5/2</sub>→<sup>6</sup>H<sub>7/2</sub>, <sup>4</sup>G<sub>5/2</sub>→<sup>6</sup>H<sub>9/2</sub> and <sup>4</sup>G<sub>5/2</sub>→<sup>6</sup>H<sub>11/</sub>2, appearing at 564&#xa0;nm, 602&#xa0;nm, 650&#xa0;nm and 711&#xa0;nm, respectively, with the most prominent bands in the reddish-orange region. The prepared glass is suitable for lasers and photonic applications, as it exhibits strong visible emission at 602&#xa0;nm (<sup>4</sup>G<sub>5/2</sub>→<sup>6</sup>H<sub>7/2</sub> transition), large stimulated emission cross-Sect.&#xa0;(22.71 × 10<sup><b>–</b>21</sup> cm<sup>2</sup>) and high branching ratios (55.46%). The emission lifetime values decrease with increasing Sm<sup>3+</sup> ion concentration, from 1.682 ms at 1&#xa0;mol% to 1.531 ms at 5&#xa0;mol%.</p>

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Structural and spectroscopic properties of Sm3+-doped SiO2 glass synthesized by sol-gel method

  • 期刊论文

  • 发表日期：

    2025年9月29日

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  • K. M. S. Dawngliana,
  • S. Rai

摘要

The present work focuses on understanding the structure of Sm3+ doped SiO2 in sol-gel glass and evaluating the efficiency and color rendering quality of the prepared samples. The properties of the glass were investigated using various characterization techniques, such as an Abbe refractometer. The Judd–Ofelt (JO) parameters were computed from the observed absorption spectra. XRD analysis confirmed the amorphous nature of the prepared glass. FTIR spectra indicated that the number of OH groups and organic residues in the silica can be significantly reduced by high-temperature heat treatment. The PL spectra revealed four emission bands corresponding to the transition 4G5/2→6H5/2, 4G5/2→6H7/2, 4G5/2→6H9/2 and 4G5/2→6H11/2, appearing at 564 nm, 602 nm, 650 nm and 711 nm, respectively, with the most prominent bands in the reddish-orange region. The prepared glass is suitable for lasers and photonic applications, as it exhibits strong visible emission at 602 nm (4G5/2→6H7/2 transition), large stimulated emission cross-Sect. (22.71 × 10–21 cm2) and high branching ratios (55.46%). The emission lifetime values decrease with increasing Sm3+ ion concentration, from 1.682 ms at 1 mol% to 1.531 ms at 5 mol%.