17. The luminescent material according to claim 1, wherein M comprises Zn up to 40 mol-%. 18. The luminescent material according to claim 1, wherein Al is replaced partially by Ga. 19. The luminescent material according to claim 1, wherein Si is replaced partially by Ge of not more ...
In a phosphor whose host crystal is constituted of an oxide, a method of preparing the phosphor where the oxygen deficiencies in the phosphor are not many, and a plasma display device using the same are provided. After processes of weighing, mixing and f