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US 8,329,061 B2Granted
Phosphorescent phosphors
AssigneePerformance Indicator, LLC
InventorWeiyi Jia
Life of this patent
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Abstract
Photoluminescent phosphors wherein some of the oxygen anions in the phosphor matrix have been replaced by halides or nitride. In addition, photoluminescent phosphors wherein some of the oxygen anions in the phosphor matrix have been replaced by halides or nitride and a charge compensator has been included. The phosphors are based on green emitting and blue-green emitting aluminates.
Claims5
A photoluminescent phosphor comprising a matrix represented by the formula:
- (1−x−y−z)GO.xMXi.n[(1−k/2)Al2O3.kA].yEu2+O,zR3+O1.5
- wherein:
- G=Sr or Ca;
- M=Li, Na, Ca, Sr, Ba;
- or their combinations;
- Xi=F, Cl, or F2, Cl2;
- A=MgO or AlN;
- R=Dy alone or in combination with one or more of Y, La, Ce, Pr, Nd, Sm, Gd, Tb, Ho, Er, Tm, Yb, and Lu or their combinations;
- x=0.00001 to 0.4;
- y=0.00001 to 0.10;
- z=0.00001 to 0.10;
- n=1 to 3;
- and
- k=0.00001 to 0.10;
11 more elements
Dependencies are inferred from the claim text.