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US 7,125,501 B2Granted
High efficiency alkaline earth metal thiogallate-based phosphors
AssigneeSarnoff Corporation
InventorsYongchi Tian, Diane Zaremba, Perry Niel Yocom
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Abstract
Provided, among other things, is a strontium calcium thiogallate phosphor doped with divalent europium, and having the following formula: Sr1-xCaxGa2S4:yEu2+.zGa2S3, where x is 0.0001 to 1, y is a value defining sufficient Eu2+ to provide luminescent emission, and z is 0.0001 to 0.2 based on the mole amount of Sr1-xCaxGa2S4:yEu2+.
Claims15
A strontium calcium thiogallate phosphor doped with divalent europium, and having the following formula:
- Sr1-xCaxGa2S4:yEu2+.zGa2S3,
- where x is a value such that both Sr and Ca are present and is greater than or equal to 0.0001, y is a value defining sufficient Eu2+ to provide luminescent emission, and z is greater than 0.07 up to 0.2 based on the mole amount of Sr1-xCaxGa2S4.
Dependencies are inferred from the claim text.