Patent ID: 8007685

Claim:
A red light phosphor, comprising sulfide and activating agent wherein: the sulfide is a fluorine-sulfur oxide containing lanthanum-yttrium-zirconium and/or hafnium with overall stoichiometric formula as (La 1-x-y-z Y x A y Me z +4 O) 2 S 1 (F −1 ) 2z , wherein x=0.001-0.2, y=0.01-0.2, z=0.001-0.005, and Me +4 is selected from the group consisting of Zr +4 , Hf +4 , and combinations thereof; and the activating agent, A, comprises TR +3 and TR +4 , wherein TR +3 is selected from the group consisting of Eu, Sm, Gd, Tb, and combinations thereof, and TR +4 is Pr +4 .