Patent Number: 7,101,520

Title: High luminescence phosphor particles and methods for producing the particles

Abstract: Methods for producing metal/metalloid oxide particles comprise rare earth metals herein include reacting a reactant stream in a gas flow. The reactant stream includes a rare earth metal precursor and an oxygen source. A collection of particles comprising metal/metalloid oxide have an average particle size from about 15 nm to about 1 micron. The metal/metalloid oxide comprises a non-rare earth metal oxide wherein less than about 25 percent of a non-rare earth metal is substituted with a rare earth metal. The metal/metalloid oxide particles can be reacted with H.sub.2S or C.sub.2S to form corresponding metal/metalloid sulfide particles. The metal/metalloid sulfide particles can be doped with rare earth metals. The particles are useful as phosphors, for example for use in displays.

Inventors: Kumar; Sujeet (Newark, CA)

Assignee: NanoGram Corporation

International Classification: C09K 11/56 (20060101); C01B 13/14 (20060101); C01B 17/20 (20060101); C01G 1/02 (20060101); C01G 1/12 (20060101)

Expiration Date: 9/05/02018