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US 2010/0244076 A1Published application
Light emitting device comprising a green emitting sialon-based material
AssigneeKoninklijke Philips Electronics N.V.
InventorsPeter J. Schmidt, Walter Mayr, Joerg Meyer, Juliane Angelika Kechele, Wolfgang Schnick, Oliver Michael Oeckler
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Abstract
The invention relates to a light emitting device, especially a LED comprising a green emitting material of the composition Sr5−y−z−aMySi23−xAl3+xOx+2aN37−x−2a:Euz:Cez1. This material has been found to have a narrow emission in the green wavelight range together with a good producibility and stability.
Claims10
Light emitting device, especially a LED comprising a green emitting material essentially of the composition
- Sr5−y−z−aMySi23−xAl3+xOx+2aN37−x−2a:Eu:Cez1
- whereby M is selected out of the group comprising Ca, Ba, Mg or mixtures thereof,
- and x is ≧0 to ≦7, y is ≧0 to ≦5, a is ≧0 to ≦1.5, z is ≧0.0001 to ≦0.5 and z1 is ≧0 to ≦0.5
Dependencies are inferred from the claim text.