Synthesis, Structural Characterization, and Luminescent Properties of Eu³⁺-Doped Silicate-Based Red Light-Emitting Phosphor for LED Applications

This research investigates the synthesis and characterization of Eu³⁺-doped silicate phosphors for use in red-emitting LEDs. These phosphors were synthesized through a high-temperature solid-state reaction method, a technique known for producing stable, crystalline phosphor materials. The structural and luminescent properties were thoroughly analyzed using techniques such as X-ray diffraction (XRD) to confirm crystallinity, photoluminescence (PL) spectroscopy to assess emission profiles, and scanning electron microscopy (SEM) for morphological examination. Results showed a prominent red emission peak at 611 nm due to the ⁵D₀ → ⁷F₂ transition, which was optimized at a dopant concentration of 7 mol% Eu³⁺. The phosphors also displayed excellent thermal stability, retaining over 85% of their luminescent intensity at 150°C, which is promising for applications in high-temperature LED systems. Additionally, optical properties, including Judd-Ofelt intensity parameters and stimulated emission cross-sections, were analyzed to further confirm these materials’ suitability for photonic applications.

  Keywords: Eu³⁺-doped silicate phosphor, red emission, photoluminescence, X-ray diffraction, LED applications, thermal stability, concentration quenching, solid-state synthesis, Judd-Ofelt analysis, optical properties.