Abstract: A Europium beta-diketonate molecule comprises Europium with ligands dibenzoylmethane, 1,10-phenanthroline, and methoxide. The molecule is photoluminescent, absorbing light from the ultraviolet region through the blue region and emitting red light characteristic of trivalent europium. The molecule may be used, for example, as a phosphor in a phosphor-converted light-emitting diode.

Abstract: Green emitting phosphors have the empirical composition RE1?wAwMxEy, where RE may be one or more Rare Earth elements (for example, Eu or Gd), A may be one or more elements selected from the group Mg, Ca, Sr, or Ba, M may be one or more elements selected from the group Al, Ga, B, In, Sc, Lu or Y, E may be one or more elements selected from the group S, Se, O, or Te, w is greater than or equal to zero, or greater than or equal to 0.01, or greater than or equal to 0.05, and less than or equal to about 0.8, 2?x?4, and 4?y?7.

Abstract: Phosphors emitting green light over a narrow wavelength range may be used to broaden the gamut of display devices. In one aspect, a light emitting device comprises a light emitting solid state device emitting blue or violet light, a first phosphor that absorbs blue or violet light emitted by the light emitting solid state device and in response emits green light in a spectral band having a peak at wavelength ?G and a height of one half its peak on a long wavelength edge of the band at wavelength ?Ghalf; and a second phosphor that absorbs blue or violet light emitted by the light emitting solid state device and in response emits red light in a spectral band having a peak at wavelength ?R and a height of one half its peak on a short wavelength edge of the band at wavelength ?Rhalf. The ratio (?Rhalf??Ghalf)/(?R??G) is greater than 0.70.

Abstract: Thioaluminate phosphor particles having a coating comprising or consisting essentially of a nitride, and methods for making such phosphor particles, are disclosed. Phosphor-converted light emitting diodes may comprise such coated phosphor particles. The nitride coatings on the thioaluminate phosphor particles provide a significantly improved barrier to water compared, to an aluminum oxide coating, and extend the operational lifetime of such a phosphor-converted light emitting diode.

Abstract: In one aspect, a phosphor converted white light LED comprising a narrow green phosphor rather than a conventional broad green phosphor may simultaneously exhibit high R9, and high Luminance Efficacy of Radiation, optionally without use of a deep red phosphor to maintain desired red color rendering. In another aspect, a phosphor converted white light LED comprising a narrow green phosphor rather than a conventional broad green phosphor may provide an emission spectrum exhibiting a significant dip in the yellow region of the spectrum and thereby provide high red-green contrast without use of a filter. The yellow dip may be shallower than in conventional devices, and the device may therefore be brighter, while maintaining desired CRI and R9.

Abstract: A luminescent composition of matter is characterized by the formula REM2+xEy, where RE may be one or more Rare Earth elements (for example, Eu or Gd), M may be one or more elements selected from the group Al, Ga, B, In, Sc, Lu, and Y; E is one or more elements selected from the group S, Se, O, and Te; x is greater than zero; and y has the value that achieves charge balance in the formula assuming that E has a charge of ?2.