Photoluminescence Properties of Novel Ca3Y2B4O12:Eu3+ and Dy3+ Phosphors for Solid-State Lighting Prepared by Combustion Method

In this study, novel Ca₃Y₂B₄O₁₂:Eu³⁺ and Dy³⁺ phosphors were synthesized utilizing a simple and efficient combustion process. The Ca₃Y₂B₄O₁₂ host orthorhombic phase with high crystallinity formation is confirmed by structural x-ray diffraction analysis. The Ca₃Y₂B₄O₁₂:Eu³⁺ phosphors PL study indicated different emission peaks at 595 and 618 nm under 397 nm excitation, whereas Ca₃Y₂B₄O₁₂:Dy³⁺ phosphors emission peaks displayed blue (485 nm) and yellow (579 nm) under 353 nm excitation. The ideal doping concentration of 0.5 mol% for Eu³⁺ and Dy³⁺ ions resulted in maximum emission intensity due to reduced concentration quenching effects. The chromaticity coordinates show that the emissions are in the visible spectrum, with high-purity colors suitable for solid state lighting. The results indicate that novel Ca₃Y₂B₄O₁₂:Eu³⁺ and Dy³⁺ is promising materials for n-UV emitting phosphors for solid-state lighting applications.