SM-activated aluminate and borate phosphors

US9102873B2 · kind B2 · utility

Assignee

• Merck Patent GmbH · DE

Inventors

• Holger Winkler · Darmstadt, DE
• Thomas Juestel · Aachen, DE
• Simas Sakirzanovas · Steinfurt, DE

Key dates

• Filing date: Sep 15, 2010
• Grant date: Aug 11, 2015
• Expiry date: Dec 30, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H05B33/14
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Disclosed are phosphors of formula (I) (Ln1−a−bGdaSmb)wMgxSry(Al1−cBc)zO(3/2w+x+y+3/2z) (I), where Ln=Y, La and/or Lu; a, c=0.0 to 1.0; 0<b<0.2 and a+b<1.0; w=1.0 to 3.0; x, y=1.0 to 2.0 and z>0.0 to 12.0, and to a process for the preparation of these phosphors and to the use thereof as conversion phosphors for conversion of the near-UV emission from an LED.