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<p>The glass was synthesized using sustainable agro-food waste such as corn husk (CHA), sugar cane leaves ash (SCLA), and eggshell powder (ESP). Further, the glass is doped with 0.5 and 1 wt% of Dy<sub>2</sub>O<sub>3</sub> and heat treated at 800, 900, and 1000&#xa0;°C to convert into glass ceramics. The heat-treated glass ceramics are characterized and tested by various techniques. The optical bandgap is decreased with crystalline phase formation. The photoluminescence studies reveal the strong emission peaks corresponding to Dy<sup>3</sup>⁺ transitions, the emission peaks at 483&#xa0;nm (blue), 576 (yellow), 664, and 753&#xa0;nm (red) corresponding to <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>15/2</sub>, <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>13/2</sub>, <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup>H<sub>11/2</sub> and <sup>4</sup>F<sub>9/2</sub> → <sup>6</sup> H<sub>9/2</sub> transitions and CIE coordinates approaching white light coordinates with the increase in higher temperatures and at high Dy<sup>3+</sup> doping concentrations. The obtained results were compared with glass and crystalline counterparts of silicate-based glasses. The study highlights the potential of using agro-food waste-derived glass ceramics as host materials without hampering photoluminescence properties and can be used in energy-efficient solid-state lighting applications.</p>

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Evolution of crystalline phases in glass matrix and their effect on optical and photoluminescent properties of silicate glasses derived from agro-food wastes

  • 期刊论文

  • 发表日期：

    2025年3月27日

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  • Shivani Punj,
  • Navneet Kaur Mattu,
  • Kulvir Singh

摘要

The glass was synthesized using sustainable agro-food waste such as corn husk (CHA), sugar cane leaves ash (SCLA), and eggshell powder (ESP). Further, the glass is doped with 0.5 and 1 wt% of Dy2O3 and heat treated at 800, 900, and 1000 °C to convert into glass ceramics. The heat-treated glass ceramics are characterized and tested by various techniques. The optical bandgap is decreased with crystalline phase formation. The photoluminescence studies reveal the strong emission peaks corresponding to Dy3⁺ transitions, the emission peaks at 483 nm (blue), 576 (yellow), 664, and 753 nm (red) corresponding to 4F9/2 → 6H15/2, 4F9/2 → 6H13/2, 4F9/2 → 6H11/2 and 4F9/2 → 6 H9/2 transitions and CIE coordinates approaching white light coordinates with the increase in higher temperatures and at high Dy3+ doping concentrations. The obtained results were compared with glass and crystalline counterparts of silicate-based glasses. The study highlights the potential of using agro-food waste-derived glass ceramics as host materials without hampering photoluminescence properties and can be used in energy-efficient solid-state lighting applications.