Patent ID: 7919011
Filing Date: 2011-04-05
Classification: C09K,H01L

Abstract:
1. A fluorescent powder comprising a substrate prepared from YAG (yttrium aluminum garnet) and an excitant prepared from cerium and ions including Tb (terbium), Gd (gadolinium) ions, Yb (ytterbium) ions and Lu (lutetium) ions, said YAG (yttrium aluminum garnet) having the chemical formula of (Y 1-x-y-z-p-q Gd x Tb y Yb z Lu p Ce q ) 3 Al 5 O 12 , wherein x=0.05˜0.9, y=0.001˜0.3, z=0.01˜0.5, p=0.01˜0.2, and q=0.0001˜0.2.