Doped garnet fluorescent substance having red shift for pc LEDs

US8350465B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Holger Winkler · Darmstadt, DE
• Thomas Juestel · Aachen, DE
• Julian Plewa · Munster, DE

Key dates

• Filing date: Sep 2, 2009
• Grant date: Jan 8, 2013
• Expiry date: Sep 2, 2029

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10T428/24413
• WIPO field: Electrical machinery, apparatus, energy
• WIPO sector: Electrical engineering

Abstract

The invention relates to phosphors having a garnet structure of the formula I (Ya,Lub,Sec,Tbd,The,Irf,Sbg)3−x (Al5−yMgy/2Siy/2)O12:Cex (I), where a+b+c+d+e+f+g+h+i=1 x=0.005 to 0.1 and y=0 to 4.0, and to a process for the preparation of these phosphors and to the use as conversion phosphors for conversion of the blue or near-UV emission from an LED.