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

US8896006B2 · kind B2 · utility

Assignee

• OSRAM Gesellschaft mit beschraenkter Haftung · DE

Inventors

• Daniel Becker · Worms, DE
• Tim Fiedler · Birkenfeld, DE
• Frank Jermann · Königsbrunn, DE
• Bianca Pohl · Birkenfeld, DE

Key dates

• Filing date: Oct 26, 2009
• Grant date: Nov 25, 2014
• Expiry date: Dec 25, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/77347
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

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.