Abstract: A semiconductor structure includes an active region configured to emit light upon the application of a voltage thereto, a window layer configured to receive the light emitted by the active region, and a plurality of discrete phosphor-containing regions on the window layer and configured to receive light emitted by the active region and to convert at least a portion of the received light to a different wavelength than a wavelength of light emitted by the active region. Methods of forming a semiconductor structure including an active region configured to emit light and a window layer include forming a plurality of discrete phosphor-containing regions on the window layer.

Abstract: A luminescent particle includes a luminescent compound that is configured to perform a photon down conversion on a portion of received light and a reflectance reducing outer surface of the luminescent particle that is operable to increase the portion of received light that is absorbed in the luminescent particle.

Abstract: A method is disclosed for forming a blended phosphor composition. The method includes the steps of firing precursor compositions that include europium and nitrides of at least calcium, strontium and aluminum, in a refractory metal crucible and in the presence of a gas that precludes the formation of nitride compositions between the nitride starting materials and the refractory metal that forms the crucible. The resulting compositions can include phosphors that convert frequencies in the blue portion of the visible spectrum into frequencies in the red portion of the visible spectrum.

Abstract: A solid state lighting apparatus includes a plurality of light emitting diodes (LEDs) including at least a first LED and a second LED. Chromaticities of the first and second LEDs are selected so that a combined light generated by a mixture of light from the pair of LEDs has about a target chromaticity. The first LED may include a first LED chip that emits light in the blue portion of the visible spectrum and a phosphor that emits red light in response to blue light emitted by the first LED chip. The second LED emits light having a color point that is above the planckian locus of a 1931 CIE Chromaticity diagram, and in particular may have a yellow green, greenish yellow or green hue.

Abstract: A method of fabricating a light emitting device (LED) includes measuring emission characteristics for a plurality of LED chips configured to emit light of a first color. The plurality of LED chips are sorted based on the measured emission characteristics to provide a plurality of groups respectively including ones of the plurality of LED chips having similar measured emission characteristics. A respective light conversion material is selected for each of the plurality of groups based on the measured emission characteristics of the ones of the plurality of LED chips included therein and a desired color point. The selected light conversion material is configured to absorb at least some of the light of the first color and responsively emit light of a second color.

Abstract: Compounds of Formula I, which include both cerium and europium, may be useful as phosphors in solid state light emitting devices. Light emitting devices including such phosphors may emit warm white light.

Abstract: A semiconductor structure includes an active region configured to emit light upon the application of a voltage thereto, a window layer configured to receive the light emitted by the active region, and a plurality of discrete phosphor-containing regions on the window layer and configured to receive light emitted by the active region and to convert at least a portion of the received light to a different wavelength than a wavelength of light emitted by the active region. Methods of forming a semiconductor structure including an active region configured to emit light and a window layer include forming a plurality of discrete phosphor-containing regions on the window layer.

Abstract: A light emitting diode is disclosed, together with associated wafer structures, and fabrication and mapping techniques. The diode includes an active portion, a raised border on the top surface of the active portion and around the perimeter of the top surface of the active portion, a resin in the space defined by the border and the top surface of the active portion, and phosphor particles in the resin that convert the frequencies emitted by the active portion.

Abstract: A preform is attached to a solid state light emitting die. One or more optical elements, such as a photoluminescent element, a refracting element, a filtering element, a scattering element, a diffusing element or a reflecting element, is included in and/or on the preform. For example, the preform may be a glass preform with phosphor particles suspended therein. The preform may be fabricated using microelectronic manufacturing techniques, and may be placed on the solid state light emitting die using pick and place techniques.