| 摘要 |
A blue (Sr rich) or yellow (Ca rich) persistent phosphor composition is provided, along with methods for making and using the composition. More specifically, in one embodiment, the phosphor includes a material having a formula of Aa-b-c BdCe(Of-gNg):Eub, REc. In this formula, A may be Sr, Ca, Ba, or a combination of these metals; B may be Mg, Zn, Co, or a combination thereof; C may be Si, Ge, or a combination thereof; a is between 1 and 2.0; b is between 0.0005 and 0.1; c is between 0.0005 and 0.1; d is between 0.9 and 1; e is between 2 and 2.1; f is between 6 and 7; g is between 0.001 and 0.1; and RE is Dy, Nd, Er, Ho, Tm, Yb or a combination thereof. Beneficial embodiments use Sr, Mg and Si to produce phosphors that are blue in color or Ca, Mg and Si to produce phosphors that are yellow in color. In another embodiment, methods are provided for making persistent phosphors having the formulations above. Other embodiments provide applications for such a phosphor, including uses in toys, emergency equipment, clothing, and instrument panels, among others.
|
