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February 11, 2026

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

Key Points

The study investigates the properties of Sm3+-doped CaAl4O7-based phosphor-in-glass for high-power light applications.
Synthesis of phosphor-in-glass using multicomponent tellurite glass via melting quenching technique.
Characterization of materials using Fourier transform infrared spectroscopy and Raman studies.
Evaluation of material structure with scanning electron microscope and optical microscopy.
The P-i-G exhibits strong photoluminescence properties with significant emission bands of Sm3+ ions.
Thermal stability is maintained with 65.5% intensity at 150 °C across various UV LED input power levels.
The amorphous nature of the sample was confirmed by the absence of sharp Bragg peaks.

Abstract

A phosphor-in-glass (P-i-G) exhibiting orange-red emission, composed of Sm 3+ ion-doped CaAl 4 O 7 , 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 3+ 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.

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