Co-doped 1-1-2 nitrides

US8858834B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Holger Winkler · Darmstadt, DE
• Ralf Petry · Griesheim, DE
• Thomas Vosgroene · Ober-Ramstadt, DE
• Thomas Juestel · Aachen, DE
• Arturas Kastelnikovas · Steinfurt, DE
• Dominik Uhlich · Steinfurt, DE

Key dates

• Filing date: Nov 2, 2009
• Grant date: Oct 14, 2014
• Expiry date: May 7, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/12044
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

The invention relates to compounds of the formula (I): (Ca,Sr,Ba)1-x-yMeySiN2:Eux, where Me═Mn2+, Mg2+, Be2+, Ni2+, Co2+ and/or Ru2+; x=0.005 to 0.20; and y<1, and/or of the formula (II): (Ca,Sr,Ba)2-xSi1-zMazN2:Eux, where Ma═Hf4+, Th4+ and/or Zr4+; x=0.005 to 0.20; and z<1, and to a process for the preparation of these compounds, and to the use as phosphors and conversion phosphors for conversion of the blue or near-UV emission from an LED.