Green-emitting LED

US7851988B2 · kind B2 · utility

Assignees

• OSRAM Gesellschaft mit beschraenkter Haftung · DE
• OSRAM Opto Semiconductors GmbH · DE

Inventors

• Bert Braune · Völklingen, DE
• Herbert Brunner · Sinzing, DE
• Tim Fiedler · Birkenfeld, DE
• Frank Jermann · Königsbrunn, DE
• Martin Zachau · Geltendorf, DE

Key dates

• Filing date: Sep 24, 2004
• Grant date: Dec 14, 2010
• Expiry date: Jul 14, 2027

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2224/73265
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Phosphor from the class of the oxynitridosilicates, having a cation M which is doped with divalent europium and having the empirical formula M(1-c)Si2O2N2:Dc, where M=Sr or M=Sr(1-x-y)BaYCax with x+y<0.5 is used, the oxynitridosilicate completely or predominantly comprising the high-temperature-stable modification HT.