Abstract
Current PDP phosphors have several problems to be solved, such as the luminance degradation (blue) and luminance saturation (green). CaMgSi_2O_6:Eu^<2+>(CMS:Eu^<2+>) is recently expected to be a new blue PDF phosphor, however its initial luminance is still lower than that of BaMgAl_<10>O_<17>:Eu^<2+>. To improve the luminescent characteristics of CMS:Eu^<2+>, we performed Gd^<3+> co-doping for CMS:Eu^<2+>. Although the excitation intensity at 147 nm decreases, we found the new excitation band around 172 nm by Gd^<3+>. To improve the luminance saturation of green phosphor, we also tried to prepare green phosphor CMS doped with Tb^<3+> and Na^+ as a charge compensator. However we cannot obtain green emitting CMS:Tb^<3+> at present.
