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<p>A novel composition of 40B₂O₃–40P₂O₅–5AgO–3MgO–5Li₂O–6ZnO–1Ho₂O₃ (Ho-doped Zinc Silver Borophosphate Glass) glasses were successfully synthesized using the melt-quenching method. X-ray diffraction confirmed their amorphous nature with a broad halo, ensuring efficient rare-earth doping. UV-Vis spectroscopy revealed strong Ho³⁺ absorption bands with an optical band gap around 3.7&#xa0;eV, indicating high optical transparency and potential for photonic applications. Photoluminescence measurements showed intense green emissions near 545&#xa0;nm and red emission at ~ 650&#xa0;nm originating from the <sup>5</sup>F₄ <sup>5</sup>S₂ → <sup>5</sup>I₈ and 5F₅ → 5I₈ transitions of Ho³⁺, suggesting promising use in solid-state lighting and display devices. Thermoluminescence analysis after 10&#xa0;kGy gamma irradiation displayed a distinct glow peak at ~ 180&#xa0;°C, demonstrating excellent trapping characteristics suitable for dosimetric applications. EPR studies confirmed the presence of isolated Ho³⁺ ions in distorted sites, supporting the strong luminescence behavior. Gamma-ray shielding studies revealed superior mass attenuation coefficients and effective atomic numbers ranging from 18 to 28, outperforming many conventional glasses. The half-value layer and mean free path results suggested strong attenuation capability, highlighting potential in radiation protection. The Commission Internationale de l’Éclairage (CIE) chromaticity coordinates positioned the emission in the near-white region, confirming good color purity. The obtained Ho³⁺ doped zinc-silver borophosphate glasses demonstrate structural stability, optical and luminescent characteristics, gamma shielding, and colorimetric performance, making them a multifunctional material for photonic and shielding based applications.</p>

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Investigation on optical properties of Ho-doped zinc silver borophosphate glass for radiation shielding materials

  • 期刊论文

  • 发表日期：

    2026年7月10日

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  • P. Vinothkumar,
  • B. Yamini,
  • D. Shalini,
  • M. K. Dhatchaiyini,
  • Anu Kanakkalil John

摘要

A novel composition of 40B₂O₃–40P₂O₅–5AgO–3MgO–5Li₂O–6ZnO–1Ho₂O₃ (Ho-doped Zinc Silver Borophosphate Glass) glasses were successfully synthesized using the melt-quenching method. X-ray diffraction confirmed their amorphous nature with a broad halo, ensuring efficient rare-earth doping. UV-Vis spectroscopy revealed strong Ho³⁺ absorption bands with an optical band gap around 3.7 eV, indicating high optical transparency and potential for photonic applications. Photoluminescence measurements showed intense green emissions near 545 nm and red emission at ~ 650 nm originating from the 5F₄ 5S₂ → 5I₈ and 5F₅ → 5I₈ transitions of Ho³⁺, suggesting promising use in solid-state lighting and display devices. Thermoluminescence analysis after 10 kGy gamma irradiation displayed a distinct glow peak at ~ 180 °C, demonstrating excellent trapping characteristics suitable for dosimetric applications. EPR studies confirmed the presence of isolated Ho³⁺ ions in distorted sites, supporting the strong luminescence behavior. Gamma-ray shielding studies revealed superior mass attenuation coefficients and effective atomic numbers ranging from 18 to 28, outperforming many conventional glasses. The half-value layer and mean free path results suggested strong attenuation capability, highlighting potential in radiation protection. The Commission Internationale de l’Éclairage (CIE) chromaticity coordinates positioned the emission in the near-white region, confirming good color purity. The obtained Ho³⁺ doped zinc-silver borophosphate glasses demonstrate structural stability, optical and luminescent characteristics, gamma shielding, and colorimetric performance, making them a multifunctional material for photonic and shielding based applications.