Wavelength converting material for a light emitting device

US11031529B2 · kind B2 · utility

Assignee

• LUMILEDS LLC · US

Inventors

• Christoph Martiny · Aachen, DE
• Peter Josef Schmidt · Aachen, DE
• Oliver Steigelmann · Aachen, DE
• Cora Sieglinde Hecht · Eindhoven, NL

Key dates

• Filing date: Sep 14, 2017
• Grant date: Jun 8, 2021
• Expiry date: Sep 14, 2037

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/0361
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Embodiments of the invention include a luminescent ceramic including (Ba1-xSrx)2-zSi5-yO4yN8-4y:Euz 258 phase wavelength converting material (0.5≤x≤0.9; 0≤y≤1; 0.001≤z≤0.02) and M3Si3O3N4 3334 phase material (M=Ba, Sr, Eu). The M3Si3O3N4 3334 phase material comprises no more than 5 weight % of the material.