Garnet phosphor materials having enhanced spectral characteristics

US7094362B2 · kind B2 · utility

Assignee

• General Electric Company · US

Inventors

• Anant Achyut Setlur · Niskayuna, US
• Alok Mani Srivastava · San Francisco, US
• Holly Ann Comanzo · Niskayuna, US
• Gopi Chandran · Savanuru, IN
• Shankar Venugopal · Bengaluru, IN
• Emil Radkov · Kyle, US

Key dates

• Filing date: Oct 29, 2003
• Grant date: Aug 22, 2006
• Expiry date: Apr 29, 2024

Classification

• Technology area (CPC H): Electricity
• CPC primary: H10K50/125
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Phosphor compositions having the formulas (Tb1−x−y−z−wYxGdyLuzCew)3MrAls−rO12+δ, where M is selected from Sc, In, Ga, Zn, or Mg, and where 0<w≦0.3, 0≦x<1, 0≦y≦0.4, 0≦z<1, 0≦r≦4.5, 4.5≦s≦6, and −1.5≦δ≦1.5; (RE1−x−yScxCey)2A3−pBpSiz−qGeqO12+δ, where RE is selected from a lanthanide ion or Y3+, A is selected from Mg, Ca, Sr, or Ba, B is selected from Mg and Zn, and where 0≦p≦3, 0≦q≦3, 2.5≦z≦3.5, 0≦x≦1, 0≦y≦0.3, −1.5≦δ≦1.5; and (Ca1−x−y−zSrxBayCez)3(Sc1−a−cLuaDc)2Sin−wGewO12+δ, where D is either Mg or Zn, 0≦x<1, 0≦y<1, 0<z≦0.3, 0≦a<1, 0≦c≦1, 0≦w≦3, 2.5≦n≦3.5, and −1.5≦δ≦1.5. Also disclosed are light emitting devices including a light source and at least one of the above phosphor compositions.