Luminescent substance of the class of nitride silicates and light source having such a luminescent substance

US8093798B2 · kind B2 · utility

Assignee

• OSRAM GmbH · DE

Inventors

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

Key dates

• Filing date: Jul 31, 2007
• Grant date: Jan 10, 2012
• Expiry date: Oct 18, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8513
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A phosphor from the class of nitridosilicates from the M-Al—Si—N system, comprising a cation M, wherein M is represented by Ca alone or is represented by a mixture of Ca with at least one further element from the group Ba, Sr, Mg, Zn, Cd, Li, Na, Cu, wherein the phosphor is activated with at least one element from the group Eu, Ce which partly replaces M, characterized in that the phosphor forms a phase that is to be assigned to the system M3N2-AlN-Si3N4, wherein the atomic ratio of the constituents M:Al≧0.375 and the atomic ratio Si/Al≧1.4.