Patent ID: 8119028

Claim:
A single crystal phosphor preform comprising a single crystal of a material having a compound of Formula I: A a B b C c D d E e (I) wherein A comprises one or more elements selected from the group consisting of Ca, Sr, Ba, Mg, Y, Hf, the lanthanide elements and the other alkaline earth metals; B comprises Eu and Ce; C comprises one or more tetrahedrally-coordinated trivalent elements; D comprises one or more tetrahedrally-coordinated tetravalent elements; E comprises one or more elements selected from the group consisting of N, O, F, C, S, Cl, Br and I, wherein a+b=1 and c+d=2; and the compound has a CaAlSiN 3 -type crystal structure; wherein the single crystal phosphor preform comprises a single crystal that is configured to be attached to a light emitting diode.