Lumileds LLC

Koninklijke Philips Corporation N.V.

Lumileds Holding B.v.

Ludwig-maximillians-universitaet Muenchen

Philipp-Jean Strobel

Peter Josef Schmidt

Volker Weiler

Wolfgang Schnick

Andreas Tücks

Cora Sieglinde Hecht

Sebastian Florian Schmiechen

This specification discloses methods of enhancing the stability and performance of Eudoped narrow band red emitting phosphors. In one embodiment the resulting phosphor compositions are characterized by crystallizing in ordered structure variants of the UCrCcrystal structure type and having a composition of AELiAlSiON:Eu(AE=Ca, Sr, Ba, or a combination thereof, 0<x<0.04, 0≤y<1, 0<z<0.05, y+z≤1). It is believed that the formal substitution (Al,O)by (Si,N)reduces the concentration of unwanted Euand thus enhances properties of the phosphor such as stability and conversion efficiency.

Narrow band emitting SiAION phosphor

This specification discloses a method of enhancing the stability and performance of Eudoped narrow band red emitting phosphors. The resulting phosphor compositions are characterized by crystallizing in ordered structure variants of the UCrCcrystal structure type and having a composition of AELiAlSiON:EU(AE=Ca, Sr, Ba; 0&#x3c;x&#x3c;0.04, 0&#x2264;y&#x3c;1, 0&#x3c;z&#x3c;0.05, y+z&#x2264;1). It is believed that the formal substitution (Al,O)by (Si,N)reduces the concentration of unwanted Euand thus enhances properties of the phosphor such as stability and conversion efficiency.

Narrow band emitting SiAlON phosphor

Embodiments of the invention include a light source and a nitridoberyllate phosphor disposed in a path of light emitted by the light source. The nitridoberyllate phosphor includes a trigonal planar BeNstructure and/or a tetrahedral Be(N,O)structure.

Wavelength converting material for a light emitting device

The invention provides, amongst others for application in a lighting unit, a phosphor selected from the class ofMDCBAN:Ln&#x2003;&#x2003;(I)withM=selected from the group consisting of divalent Ca, Sr, and Ba;D=selected from the group consisting of monovalent Li, divalent Mg, Mn, Zn, Cd, and trivalent Al and Ga;C=selected from the group consisting of monovalent Li and Cu;B=selected from the group consisting of divalent Mg, Zn, Mn and Cd;A=selected from the group consisting of tetravalent Si, Ge, Ti, and Hf;Ln=selected from the group consisting of ES and RE;ES=selected from the group consisting of divalent Eu, Sm and Yb;RE=selected from the group consisting of trivalent Ce, Pr, Nd, Sm, Eu, Gd, Tb, Dy, Ho, Er, and Tm; and0&#x2264;b&#x2264;1.

LED phosphor comprising bow-tie shaped ANbuilding blocks

Embodiments of the invention include a semiconductor light emitting device with a light emitting layer disposed between an n-type region and a p-type region. The light emitting layer emits first light. The device further includes AELiBeO:Eu, wherein AE=one or more of Sr, Ba, Ca, disposed in the path of the first light. The AELiBeO:Euabsorbs first light and emits second light. In some embodiments, the first light and second light may be blue.

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Aachen, Germany

Philipp-Jean Strobel