Structural and Optical Properties of Eu- Doped Silicate Phosphors: A Review

In the Nineteenth century the traditional sulphide based phosphor has improved greatly but they applied only in some commercial fields because the sulphide series phosphors are very poor stability. The long afterglow property and brightness is not good enough. That is the reason the researcher is trying to the research on the other phosphors. The researcher got the aluminate based phosphors at beginning the Nineties. These phosphors show the better luminescent, brightness, high stability and long afterglow character over sulphide series phosphors. The drawback of the aluminate based phosphors is single luminescent color, production cost was higher, bad anti-moisture character & strict restriction over the raw materials purity. Silicate based phosphors solve these problem, the invention provides a new kind of rare earth doped alkaline earth silicates phosphors. In this review, we present an outline of the important silicate based phosphors of known luminescent materials based on Eudoping and how they were prepared, and we take a closer look at the mechanisms and applications that have been suggested to explain intense afterglow in various compounds.