LAUSR

Abstract The Ce3+ and Mn2+ doped Y3MgAl3SiO12 (YMAS) phosphors were synthesized by the high-temperature solid-state reaction in 5%H2–95%N2 reduced atmosphere. Rietveld refinement of X-ray diffraction data indicated that 0.08Ce3+-yMn2+ co-doped YMAS phosphors had a garnet type cubic structure with the Ia 3 ‾ d space group. Ce3+ occupies the lattice sites of Y3+. Mn2+occupies both lattice sites of MgO6 octahedron and AlO4 tetrahedron, emitting optical lights centered at 613 nm (Mn2+(I)) and 723 nm (Mn2+(II)), respectively. The orange-yellow light with the range of 450 nm–750nm was obtained by the energy transfer of Ce3+−Mn2+ with a maximum value of 69.2% of energy transfer efficiency. The integrated warm white LED produced white light with CRI of 85.4, CCT of 4502 K, and a CIE color coordinate (0.3542, 0.3269). It indicated that the phosphor might be suitable for blue light-excited white LEDs.