Red-emitting SR2S15N8 luminescent material and light source having a luminescent material of such kind as well as a method for producing the luminescent material
AssigneeOSRAM GmbH
InventorsDaniel Becker, Tim Fiedler, Frank Jermann, Bianca Pohl
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Abstract
A red-emitting luminescent material that belongs to the class of nitridosilicates and is doped with at least one activator D, in particular Eu, wherein the material is a modified D-doped alkaline earth nitridosilicate M2Si5N8, where M=one or more elements belonging to the group Sr, Ca, Ba, with the nitridosilicate having been stabilized by an oxidic or oxinitridic—in particular alkaline earth—phase.
Claims14
A red-emitting luminescent material that belongs to the class of nitridosilicates and is doped with at least one activator D, wherein the material is a modified D-doped alkaline earth nitridosilicate M2Si5N8, where M=one or more elements belonging to the group Sr, Ca, Ba, with the nitridosilicate having been stabilized by an oxidic or oxinitridic phase,
- wherein the stabilized luminescent material exhibits stoichiometry (Sr1+yM1−ySi5N8:D)*ax(SiO2)*bx(M′3N2), a≧0, b≧0, a+b>0, x=1/(1-a-b), y>0, and M′ can be an element or combination of elements, including those of M.
Dependencies are inferred from the claim text.