Phosphor materials and related devices

US8703016B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Prasanth Kumar Nammalwar · Savanuru, IN
• Anant Achyut Setlur · Niskayuna, US
• Digamber Gurudas Porob · Savanuru, IN
• Satya Kishore Manepalli · Bengaluru, IN

Key dates

• Filing date: Jun 28, 2011
• Grant date: Apr 22, 2014
• Expiry date: Jul 18, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10H20/8512
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

A phosphor material is presented that includes a blend of a first phosphor, a second phosphor and a third phosphor. The first phosphor includes a composition having a general formula of ((Sr1−zMz)1−(x+w)AwCex)3(Al1−ySiy)O4+y+3(x−w)F1−y−3(x−w), wherein 0<x≦0.10, 0≦y≦0.5, 0≦z≦0.5, 0≦w≦x, A comprises Li, Na, K, or Rb; and M comprises Ca, Ba, Mg, Zn, or Sn. The second phosphor includes a complex fluoride doped with manganese (Mn4+), and the third phosphor include a phosphor composition having an emission peak in a range from about 520 nanometers to about 680 nanometers. A lighting apparatus including such a phosphor material is also presented. The light apparatus includes a light source in addition to the phosphor material.