Light emitting device comprising a green emitting sialon-based material

US8546845B2 · kind B2 · utility

Assignee

• KONINIKLIJKE PHILIPS N.V. · NL

Inventors

• Peter Josef Schmidt · Aachen, DE
• Walter Mayr · Alsdorf, DE
• Joerg Meyer · Wagenfeld, DE
• Juliane Kechele · Stadtbergen, DE
• Wolfgang Schnick · Gauting, DE
• Oliver Michael Oeckler · Munich, DE

Key dates

• Filing date: Nov 27, 2008
• Grant date: Oct 1, 2013
• Expiry date: Feb 14, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C04B2235/9607
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to a light emitting device, especially a LED comprising a green emitting material of the composition Sr5−y−z−aMySi23−xAl3+xOx+2aN37−x−2a:Euz:Cez1. This material has been found to have a narrow emission in the green wavelight range together with a good producibility and stability.