Abstract: A light emitting device comprises: a thermally conductive substrate (MCPCB); at least one LED mounted in thermal communication with a surface of the substrate; a housing attached to the substrate and configured such the housing and substrate together define a volume that totally encloses the at least one LED, the housing comprising at least a part that is light transmissive (window); and at least one phosphor material provided on an inner surface of the housing within said volume said phosphor being operable to absorb at least a part of the excitation light emitted by the at least one light emitting diode and to emit light of a second wavelength range. The housing is attached to the substrate such that the volume is substantially water tight, preferably air/gas tight.

Abstract: A lighting system comprises at least one excitation source (5), preferably an LED, operable to generate and radiate excitation radiation of a first wavelength (?1); a shade (4) configured to at least in part surround the at least one source (5) and remotely located thereto; and at least one phosphor (16) provided in or on at least a part of the shade (4), wherein the phosphor (16) emits radiation of a different wavelength in response to incident excitation radiation. The phosphor can be provided on a part of an outer or inner surface of the shade. Alternatively, or in addition, the phosphor is incorporated within the shade. The lighting system finds particular application as a hanging, a desk, a floor standing, a wall mountable, a spot, an outdoor or an accent lighting fixture.

Abstract: A solid-state lamp comprising: an array of solid-state excitation sources and a photoluminescence wavelength conversion component comprising a layer of photoluminescence material and a coupling optic. The layer of photoluminescence material is remote to the excitation sources and the coupling optic is disposed between the excitation sources and the layer of photoluminescence material. The ratio of the photoluminescence material surface area of the layer of the photoluminescence material to the excitation source surface area for the array of solid-state excitation sources is at least 3 to 1.

Abstract: A solar wavelength-converter for converting higher energy shorter wavelength solar radiation to lower energy longer wavelength light, comprises: a transparent matrix having particles of at least one inorganic phosphor embedded in it in which the at least one phosphor is configured to absorb light of wavelengths between about 300 nm and about 480 nm and convert it to light with a wavelength greater than about 500 nm. The at least one phosphor can comprise: a YAG:Ce phosphor; a silicate-based phosphor of a form M2Sia4:Eu2+; a silicate-based phosphor of a form M3SiO5:Eu2+, where M is a divalent cation in the silicate-based phosphors or combinations thereof. The at least one phosphor can comprise particles of a size that is substantially transparent to solar radiation having a wavelength greater than about 460 nm.

Abstract: A photoluminescent material has the characteristic of a long photoluminescence decay and has the general composition Ca3-x-m-nAxSc2-yMySi3-zEzO12:mCe3+,nMn2+, where A is at least one divalent cation including Sr, Ba or a combination of monovalent and trivalent cations including combinations of Li, Na, K, B, Al and Ga; M is at least one trivalent cation including Al, Ga, or a divalent cation including Mg, E is a combination of a trivalent and a pentavalent cation including B, Al, Ga, N and P, or a combination of monovalent and trivalent cations including Li, Na, K, B, Al, Ga, N and P. The A cation replaces Ca; the M cation replaces Sc, and E replaces Si. This Mn and Ce doped phosphor emits in the yellow to green with a peak at around 510 and/or 560 and 690 nm. The phosphor material has applications in LED illumination systems.

Abstract: A solid-state lamp is described that includes a wavelength conversion component located at one end of the lamp. The solid-state lamp comprises: one or more solid-state light emitting devices (typically LEDs); a thermally conductive body; at least one duct; and a photoluminescence wavelength conversion component remote to the one or more LEDs, located at one end of the lamp. The lamp is configured such that the duct extends through the photoluminescence wavelength conversion component and defines a pathway for thermal airflow through the thermally conductive body to thereby provide cooling of the body and the one or more LEDs.

Abstract: A solid-state lamp is described that includes a first light emission zone and a second light emission zone, where the first light emission zone is longitudinally spaced apart from the second light emission zone. The light emission zones comprise a photoluminescence wavelength conversion component and a solid state light emitting device. The lamp comprises a lower body, a central body, and an upper duct, where the central body, and the upper duct together define at least one passageway/duct for thermal airflow.

Abstract: Phosphors comprising a nitride-based composition represented by the chemical formula: M(x/v)(M?aM?b)Si(c-x)AlxNd:RE, wherein: M is a divalent or trivalent metal with valence v; M? is at least one divalent metal; M? is at least one trivalent metal; 2a+3b+4c=3d; and RE is at least one element selected from the group consisting of Eu, Ce, Pr, Nd, Sm, Gd, Tb, Dy, Ho, Er, Tm, Yb. Furthermore, the nitride-based composition may have the general crystalline structure of M?aM?bSicNd, where Al substitutes for Si within the crystalline structure and M is located within the crystalline structure substantially at the interstitial sites.

Abstract: A green and yellow emitting lutetium aluminate based photoluminescent material having the formula (Lu1-x-yGdxCey)3BzAl5O12C2z wherein: B is one or more of Mg, Sr, Ca or Ba; C is F, Cl, Br or I; 0<x?0.5; 0.0001?y?0.2; and 0?z?0.50. The compound absorbs radiation at a wavelength ranging from about 200 nm to about 420 nm and emits visible light in the range from about 515 nm to about 577 nm. Furthermore, the compound has the characteristic CIE (x,y): 0.320<x<4.90 and 0.520<y<5.90. In some embodiments, B is Ba or Sr and C is F.

Abstract: The teachings are generally directed to phosphors having combination coatings with multifunctional characteristics that increase the performance and/or reliability of the phosphor. The teachings include highly reliable phosphors having coatings that contain more than one inorganic component, more than one layer, more than one thicknesses, more than one combination of layers or thicknesses, a gradient-interface between components, a primer thickness or layer to inhibit or prevent leaching of phosphor components into the coatings, a sealant layer to inhibit or prevent entry of moisture or oxygen from the environment, a mixed composition layer as a sealant and multifunctional combination coatings.