A New Promising Silicate-Based Phosphor for Red Light and White Light Emitting Devices

Area of Science:

• Materials Science
• Solid-State Chemistry
• Luminescence

Background:

• Developing efficient phosphors is crucial for advanced light-emitting devices.
• Understanding the structure-property relationships of novel host materials is essential for targeted applications.

Purpose of the Study:

• To synthesize and characterize Ba₃CdSi₂O₈ phosphors doped with cerium (Ce³⁺), europium (Eu³⁺), and dysprosium (Dy³⁺).
• To investigate the structural, morphological, photoluminescent, and chemical properties of these novel phosphors.
• To evaluate their potential for applications in light-emitting devices.

Main Methods:

• Solid-state reaction method for phosphor synthesis.
• X-ray Diffraction (XRD) and Fourier-Transform Infrared (FT-IR) spectroscopy for structural characterization.
• Photoluminescence (PL) spectroscopy to analyze emission spectra and CIE color coordinates.

Main Results:

• XRD confirmed the formation of the Ba₃CdSi₂O₈ host structure with no impurities.
• Dy³⁺-doped phosphors showed emissions in blue, yellow, red, and deep red regions.
• Ce³⁺-doped phosphors exhibited a broad emission band around 594 nm (5d-4f transition).
• Eu³⁺-doped phosphors displayed characteristic emissions corresponding to 5D₀ → 7Fⱼ transitions, with color shifts towards red.

Conclusions:

• The synthesized Ba₃CdSi₂O₈:RE phosphors possess promising photoluminescent properties.
• Doping with Eu³⁺, Dy³⁺, and Ce³⁺ allows for tuning emission colors for diverse lighting applications.
• These materials show potential for use in next-generation light-emitting devices.