Patent ID: 8070984

Claim:
A luminescent material for a light emitting diode (LED), comprising: a first compound including a host lattice and a luminescent ion within the host lattice; and at least one second compound selected from the group consisting of an aluminate, a silicate, an antimonate, a germanate, a germanate-silicate and a phosphate, wherein the host lattice comprises first ions and oxygen, wherein a first portion of the first ions is substituted by divalent copper ions, wherein the first compound emits light upon excitation with ultraviolet light or visible light emitted by the LED, wherein the first compound has a trigonal Glaserite (K 3 Na(SO 4 ) 2 ) crystal structure, a monoclinic Merwinite crystal structure, a tetragonal crystal structure, or an orthorhombic crystal structure, and wherein the first ions comprise at least one of Be, Mg, Ca, Sr, Ba, Zn, Cd and Mn.