Phosphor converted light emitting device
AssigneePhilips Lumileds Lighting Company, LLC
InventorsGerd Mueller, Regina Mueller-Mach, Joerg Meyer, Peter Schmidt, Detlef Wiechert
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Abstract
A semiconductor light emitting device is combined with a wavelength converting material. The semiconductor light emitting device is configured to emit first light of a first peak wavelength. The wavelength converting material is configured to absorb at least a portion of the first light and emit second light of a second peak wavelength. In some embodiments, the first wavelength converting material is (Ba1-xSr)2-y-0.5zSi5N8-zOz:Euy2+ where 0.2<x<0.3, (Ba1-xCax)2-y-0.5zSi5N8-zOz:Euy2+ where 0.01<x<0.2, or M2Si5-aAaN8-aOa:Eu2+ where M=Sr, Ba, Ca; A=Al, B, Ga, Sc; and 0.01<a<0.2.
Claims25
A structure comprising:
- a semiconductor light emitting device configured to emit first light of a first peak wavelength;
- and
- a first wavelength converting material comprising (Ba1-xSrx)2-y-0.5zSi5N8-zOz:Euy2+ where 0.2<x<0.3, the first wavelength converting material being configured to absorb at least a portion of the first light and emit second light of a second peak wavelength.
A structure comprising:
- a semiconductor light emitting device configured to emit first light of a first peak wavelength;
- and
- a first wavelength converting material comprising (Ba1-xCax)2-y-0.5zSi5N8-zOz:Euy2+ where 0.01<x<0.2, the first wavelength converting material being configured to absorb at least a portion of the first light and emit second light of a second peak wavelength.
A structure comprising:
- a semiconductor light emitting device configured to emit first light of a first peak wavelength;
- and
- a first wavelength converting material comprising M2Si5-aAaN8-aOa:Eu2+ where M=Sr, Ba, Ca;
- A=Al, B, Ga, Sc;
- and 0.01<a<0.2, the first wavelength converting material being configured to absorb at least a portion of the first light and emit second light of a second peak wavelength.
Dependencies are inferred from the claim text.