Phosphor materials and related devices

US9611237B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

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

Key dates

• Filing date: Sep 20, 2012
• Grant date: Apr 4, 2017
• Expiry date: Sep 20, 2032

Classification

• Technology area (CPC H): Electricity
• CPC primary: H01L2924/181
• 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 RE2−yM1+yA2−yScySin−wGewO12+δ:Ce3+ wherein RE is selected from a lanthanide ion or Y3+, where M is selected from Mg, Ca, Sr or Ba, A is selected from Mg or Zn and where 0≦y≦2, 2.5≦n≦3.5, 0≦w≦1, and −1.5≦δ≦1.5. 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.