2022 Volume 59 Issue 12 Pages 628-632
In this study, we synthesized blue-emitting new phosphors of P-doped Ca2SiO4:Ce3+ using the formula (Ca2−(x+y)/2−yCey□(x+y)2)(Si1−xPx)O4. The host material Ca2SiO4 has five polymorphs (γ, β, α, α'L, and α'H), and the crystal structure changes by doping of P or annealing temperatures. The relationship between the photoluminescence (PL) property and crystal structure is our focus point. The phosphors were characterized using X-ray diffraction, X-ray absorption fine structure, and fluorescence spectrophotometry. Results revealed that the P-doped Ca2SiO4:Ce3+ phosphor produced a bright blue emission, with the highest photoluminescence PL values achieved when Ce content (y) = 0.04 and the annealing temperature was 1473 K.
