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Nanocrystal doped matrixes

United States Patent

January 12, 2010
View the Complete Patent at the US Patent & Trademark Office
Matrixes doped with semiconductor nanocrystals are provided. In certain embodiments, the semiconductor nanocrystals have a size and composition such that they absorb or emit light at particular wavelengths. The nanocrystals can comprise ligands that allow for mixing with various matrix materials, including polymers, such that a minimal portion of light is scattered by the matrixes. The matrixes of the present invention can also be utilized in refractive index matching applications. In other embodiments, semiconductor nanocrystals are embedded within matrixes to form a nanocrystal density gradient, thereby creating an effective refractive index gradient. The matrixes of the present invention can also be used as filters and antireflective coatings on optical devices and as down-converting layers. Processes for producing matrixes comprising semiconductor nanocrystals are also provided. Nanostructures having high quantum efficiency, small size, and/or a narrow size distribution are also described, as are methods of producing indium phosphide nanostructures and core-shell nanostructures with Group II-VI shells.
Parce; J. Wallace (Palo Alto, CA), Bernatis; Paul (Sunnyvale, CA), Dubrow; Robert (San Carlos, CA), Freeman; William P. (San Mateo, CA), Gamoras; Joel (Vallejo, CA), Kan; Shihai (San Jose, CA), Meisel; Andreas (Redwood City, CA), Qian; Baixin (Sunnyvale, CA), Whiteford; Jeffery A. (Belmont, CA), Ziebarth; Jonathan (Palo Alto, CA)
Nanosys, Inc. (Palo Alto, CA)
11/ 492,717
July 24, 2006
STATEMENT AS TO RIGHTS TO INVENTIONS MADE UNDER FEDERALLY SPONSORED RESEARCH AND DEVELOPMENT Portions of this invention may have been made with United States Government support under Department of Energy grant DE-FG02-04ER84020 entitled "High Efficiency Nanocomposite White Light Phosphors." As such, the United States Government may have certain rights in the invention.