Phosphor and blends thereof for use in LEDs

US7501753B2 · kind B2 · utility

Assignee

• LUMINATION LLC · US

Inventors

• Dan Hancu · Clifton Park, US
• Mukunda Adyam · Savanuru, IN
• Emil Radkov · Kyle, US
• Prasanth Kumar · Fremont, US
• Anant Achyut Setlur · Niskayuna, US
• Alok Mani Srivastava · San Francisco, US
• Holly Ann Comanzo · Niskayuna, US
• Gopi Chandran · Savanuru, IN
• Madras Shankar · Savanuru, IN

Key dates

• Filing date: Aug 31, 2005
• Grant date: Mar 10, 2009
• Expiry date: Oct 22, 2026

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C09K11/77342
• WIPO field: Basic materials chemistry
• WIPO sector: Chemistry

Abstract

Phosphor compositions having the formula EueMmAaGgQqNnXx, where M is at least one of Be, Mg, Ca, Sr, Ba, Cd, Sn, Pb or Zn; A is at least one of B, Al, Ga, In, Bi, Sc, Y, La or a rare earth element other than Eu; G is at least one of Si or Ge; Q is at least one of O, S, and Se; X is at least one of F, Cl, Br and I; 0<e<2, 0<m<2, 0≦a<1, 0<g<1, 0<q<4, 0≦n<2, 0≦x<2, and 2e+2m+3a+4g=2q+3n+x; and light emitting devices including a light source and the above phosphor. Also disclosed are blends of EueMmAaGgQqNnXx and one or more additional phosphors and light emitting devices incorporating the same.