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<p>A phosphor-in-glass (P-i-G) exhibiting orange-red emission, composed of Sm<sup>3+</sup> ion-doped CaAl<sub>4</sub>O<sub>7</sub>, was synthesized utilizing a multicomponent tellurite glass system via melting quenching technique. Absence of sharp Bragg peaks indicates the amorphous nature of the fabricated P-i-G. Fourier transform infrared spectroscopy (FTIR) and Raman studies, confirmed the existence of characteristic vibrational modes corresponding to the B-O and Te–O bonds. Through the optical microscopy and scanning electron microscope (SEM), the presence of phosphor material was observed inside the glass matrix. Strong emission bands of Sm<sup>3+</sup> ions were identified from the P-i-G sample using the photoluminescence (PL) measurement. The P-i-G demonstrates significant thermal and power stabilities, maintaining 65.5% of its initial intensity at 150&#xa0;°C, displaying consistent emission across a broad UV LED input power range of 0.25–10&#xa0;W.</p>

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Photoluminescence properties of Sm3+-doped CaAl4O7-based phosphor-in-glass for high-power orange light applications

  • 期刊论文

  • 发表日期：

    2026年2月7日

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  • Mahesha Hegde,
  • Mitrabhanu Behera,
  • Tapas Paramanik,
  • Dominika Przybylska,
  • Przemysław Woźny,
  • Phani Kumar Mallisetty,
  • R Arun Kumar

摘要

A phosphor-in-glass (P-i-G) exhibiting orange-red emission, composed of Sm3+ ion-doped CaAl4O7, was synthesized utilizing a multicomponent tellurite glass system via melting quenching technique. Absence of sharp Bragg peaks indicates the amorphous nature of the fabricated P-i-G. Fourier transform infrared spectroscopy (FTIR) and Raman studies, confirmed the existence of characteristic vibrational modes corresponding to the B-O and Te–O bonds. Through the optical microscopy and scanning electron microscope (SEM), the presence of phosphor material was observed inside the glass matrix. Strong emission bands of Sm3+ ions were identified from the P-i-G sample using the photoluminescence (PL) measurement. The P-i-G demonstrates significant thermal and power stabilities, maintaining 65.5% of its initial intensity at 150 °C, displaying consistent emission across a broad UV LED input power range of 0.25–10 W.