DOE Patents Database - Search Results

Patent Title	Inventor(s)	Issue Date	Patent Number
Some embodiments of the present invention are directed toward nanocrystalline oxide-based phosphor materials, and methods for making same. Typically, such methods comprise a steric entrapment route for converting precursors into such phosphor material. In some embodiments, the nanocrystalline oxide-based phosphor materials are quantum splitting phosphors. In some or other embodiments, such nanocrystalline oxide based phosphor materials provide reduced scattering, leading to greater efficiency, when used in lighting applications. Method to produce nanocrystalline powders of oxide-based phosphors for lighting applications	Loureiro, Sergio Paulo Martins , Setlur, Anant Achyut , Williams, Darryl Stephen , Manoharan, Mohan , Srivastava, Alok Mani	12/25/2007	7,311,859
A process for preparing color stable Mn.sup.+4 doped phosphors includes providing a phosphor of formula I; A.sub.x[MF.sub.y]:Mn.sup.+4 I and contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid; A.sub.x[MF.sub.y]; II wherein A is Li, Na, K, Rb, Cs, NR.sub.4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; x is the absolute value of the charge of the [MF.sub.y] ion; and y is 5, 6 or 7. In particular embodiments, M is Si, Ge, Sn, Ti, Zr, or a combination thereof. A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor composition radiationally coupled to the light source, and which includes a color stable Mn.sup.+4 doped phosphor. Color stable manganese-doped phosphors	Lyons, Robert Joseph , Setlur, Anant Achyut , Deshpande, Anirudha Rajendra , Grigorov, Ljudmil Slavchev	08/28/2012	8,252,613
An apparatus for determining past-service conditions and/or remaining useful life of a component of a combustion engine and/or a thermal barrier coating ("TBC") of the component comprises a radiation source that provides the exciting radiation to the TBC to excite a photoluminescent ("PL") material contained therein, a radiation detector for detecting radiation emitted by the PL material, and means for relating a characteristic of an emission spectrum of the PL material to the amount of a crystalline phase in the TBC, thereby inferring the past-service conditions or the remaining useful life of the component or the TBC. Apparatus for determining past-service conditions and remaining life of thermal barrier coatings and components having such coatings	Srivastava, Alok Mani , Setlur, Anant Achyut , Comanzo, Holly Ann , Devitt, John William , Ruud, James Anthony , Brewer, Luke Nathaniel	05/04/2004	US 6,730,918
A method for determining past-service conditions and/or remaining useful life of a component of a combustion engine and/or a thermal barrier coating ("TBC") of the component comprises providing a photoluminescent ("PL") material in the TBC, directing an exciting radiation at the TBC, measuring the intensity of a characteristic peak in the emission spectrum of the PL material, and correlating the intensity of the characteristic peak or another quantity derived therefrom to an amount of a new phase that has been formed as a result of the exposure of the component to extreme temperatures. An apparatus for carrying out the method comprises a radiation source that provides the exciting radiation to the TBC, a radiation detector for detecting radiation emitted by the PL material, and means for relating a characteristic of the emission spectrum of the PL material to the amount of the new phase in the TBC, thereby inferring the past-service conditions or the remaining useful life of the component. Method And Apparatus For Determining Health Of Thermal Barrier Coatings	Srivastava, Alok Mani , Setlur, Anant Achyut , Comanzo, Holly Ann , Devitt, John William , Ruud, James Anthony , Brewer, Luke Nathaniel	09/13/2005	US 6,943,357
A phosphor blend comprises at least two phosphors each selected from one of the groups of phosphors that absorb UV electromagnetic radiation and emit in a region of visible light. The phosphor blend can be applied to a discharge gas radiation source to produce light sources having high color rendering index. A phosphor blend is advantageously includes the phosphor (Tb,Y,LuLa,Gd).sub.x(Al,Ga).sub.yO.sub.12:Ce.sup.3+, wherein x is in the range from about 2.8 to and including 3 and y is in the range from about 4 to and including 5. Phosphor blends for high-CRI fluorescent lamps	Setlur, Anant Achyut , Srivastava, Alok Mani , Comanzo, Holly Ann , Manivannan, Venkatesan , Beers, William Winder , Toth, Katalin , Balazs, Laszlo D.	06/24/2008	7,391,148
A phosphor blend comprises at least two phosphors each selected from one of the groups of phosphors that absorb UV electromagnetic radiation and emit in a region of visible light. The phosphor blend can be applied to a discharge gas radiation source to produce light sources having high color rendering index. A phosphor blend is advantageously includes the phosphor (Tb,Y,LuLa,Gd).sub.x(Al,Ga).sub.yO.sub.12:Ce.sup.3+, wherein x is in the range from about 2.8 to and including 3 and y is in the range from about 4 to and including 5. Phosphor blends for high-CRI fluorescent lamps	Setlur, Anant Achyut , Srivastava, Alok Mani , Comanzo, Holly Ann , Manivannan, Venkatesan , Beers, William Winder , Toth, Katalin , Balazs, Laszlo D.	06/24/2008	7,391,148
Phosphor compositions, blends thereof and light emitting devices including white light emitting LED based devices, and backlights, based on such phosphor compositions. The devices include a light source and a phosphor material as described. Also disclosed are phosphor blends including such a phosphor and devices made therefrom. Green emitting phosphors and blends thereof	Setlur, Anant Achyut , Siclovan, Oltea Puica , Nammalwar, Prasanth Kumar , Sathyanarayan, Ramesh Rao , Porob, Digamber G. , Chandran, Ramachandran Gopi , Heward, William Jordan , Radkov, Emil Vergilov , Briel, Linda Jane Valyou	12/28/2010	7,857,994

Top