US 6,982,523 B2
Red light emitting phosphor, its production and light emitting device
Tsutomu Odaki, Nishishirakawa-gun (Japan)
Assigned to Kabushiki Kaisha Fine Rubber Kenkyuusho, Nishishirakawa-gun (Japan)
Filed on Jan. 28, 2003, as Appl. No. 10/352,131.
Prior Publication US 2004/0145307 A1, Jul. 29, 2004
Int. Cl. H01J 1/62 (2006.01); H01J 63/04 (2006.01); C09K 11/68 (2006.01); H01L 29/201 (2006.01); H01L 29/227 (2006.01)
U.S. Cl. 313—503 14 Claims
OG exemplary drawing
 
1. A red light emitting phosphor capable of emitting red light upon excitation with light having a wavelength of 350 to 420 nm, characterized by having a composition of compositional formula (1):
AEuxLn(1-x)M2O8  (1)
wherein A is at least one element selected from the group consisting of Li, Na, K, Rb and Cs, and is partially substituted with at least one element selected from the group consisting of Mg, Ca, Sr and Ba to be added as a co-activator,
Ln is at least one element selected from the group consisting of Y and rare earth elements exclusive of Eu,
M is at least one element selected from the group consisting of W and Mo, and
x is a positive number satisfying 0<x≤1.