Enhancement of Luminescence Properties by Sr[sup 2+] Substituting Ba[sup 2+] in Red-Emitting Phosphors: Ba[sub 1−y]Sr[sub y]La[sub 2−x]ZnO[sub 5]:xEu (x=0–1, y=0–0.7)

was prepared by the vibrating milled solid-state reaction, and the photoluminescence properties were investigated. The results show that the optimum emission intensity is at for serial phosphors under near-UV light excitation (394 nm) and the CIE chromaticity coordinate is located at (0.624, 0.376). Furthermore, doping for serial phosphors were also investigated; photoluminescence properties indicated that increasing content enhances not only the emission intensity ratio of transition (red emission) to transition (orange emission) but also the emission intensity of transition. The color purity enhancement results from the relatively lower symmetry environment around ions. The phosphors have optimal integrated emission intensity, which is 62% larger than the integrated emission intensity of phosphors, and the CIE chromaticity coordinate (, ) of phosphor is (0.633, 0.367) under near-UV light excitation.