PHOSPHOR MATERIAL, COATING PHOSPHOR COMPOSITION, METHOD OF PREPARING PHOSPHOR MATERIAL AND LIGHT EMITTING DEVICE

摘要

Disclosed are phosphor, coating phosphor composition, a method for preparing the phosphor, and a light emitting device. A silicate -based phosphor is expressed in a chemical formula of (4-x-y-z)SrO-xBaO-zCaO-aMgO-2(SiO2 )-bM2 O3 : yEu, wherein M is at least one of Y, Ce, La, Nd, Gd, Tb, Yb or Lu, in which 0 x3.95, 0 y≤1, 0z 3.95, x+y+z 4, 0 a 2, and 0 b 1.