Red-emitting luminophore and light source comprising such a luminophore

US8460579B2 · 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
• Martin Zachau · Geltendorf, DE

Key dates

• Filing date: Apr 11, 2008
• Grant date: Jun 11, 2013
• Expiry date: Apr 11, 2028

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/77348
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A red-emitting phosphor composed of an M-Al—Si—N system, comprising a cation M, wherein M is represented by at least one of the elements Ca or Ba or Sr and, if appropriate, can additionally be combined with at least one further element from the group Mg, Zn, Cd, wherein the phosphor is activated with Eu, which partly replaces M, and wherein the phosphor additionally contains LiF.