Enhanced photoluminescence properties of Zn2SiO4:Mn2+ co-activated with Y3+/Li+ under VUV excitation

A series of green phosphors Zn1.92-2xYxLixSiO4:0.08Mn(2+) (0 <= x <= 0.03) were prepared by solid-state synthesis method. Phase and lattice parameters of the synthesized phosphors were characterized by powder X-ray diffractometer (XRD) and the co-doped effects of Y3+/Li+ upon emission intensity and decay time were investigated under 147 nm excitation. The results indicate that the co-doping of Y3+/Li+ has favorable influence on the photoluminescence properties of Zn2SiO4:Mn2+, and the optimal photoluminescence intensity of Zn1.90Y0.01Li0.01SiO4:0.08Mn(2+) is 103% of that of commercial phosphor when the doping concentration of Y3+/Li+ is 0.01 mol. Additionally, the decay time of phosphor is much shortened and the decay time of Zn1.90Y0.01Li0.01SiO4:0.08Mn(2+) is 3.39 ms, shorter by 1.83 ms than that of commercial product after Y3+/Li+ co-doping. (c) 2010 Elsevier B.V. All rights reserved.