Muncy, Geissler, Olds & Lowe, P.C.
White light emitting devices utilizing phosphors
Disclosed is a phosphor having a formula of (Sr1−a−b−cMaTmbEuc)3Si1−dGedO5. Sr, M, Tm, and Eu are divalent metal ions, and M is selected from Ca, Ba, Mg, or combinations thereof. Si and Ge are tetravalent ions. 0≦a≦0.5, 0≦b≦0.03, 0<c≦0.1, and 0<d≦0.005. The phosphor can be collocated with a yellow phosphor and a blue light excitation source to complete a warm white light emitting device.
Industrial Technology Research Institute
H C Y
H01L C09K Y02B
additional inventional additional
Tien-Heng
Huang