Luminescent material
AssigneeSeoul Semiconductor Co., Ltd.
InventorsGundula ROTH, Walter TEWS, Chung-Hoon LEE
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Abstract
A luminescent material is disclosed. The luminescent material may include a first compound having a host lattice comprising first ions and oxygen. A first portion of the first ions may be substituted by copper ions. In one embodiment, the host lattice may include silicon, the copper ions may be divalent copper ions and the first compound may have an Olivine crystal structure, β-K2SO4 crystal structure, a trigonal Glaserite (K3Na(SO4)2) or monoclinic Merwinite crystal structure, a tetragonal Ackermanite crystal structure, a tetragonal crystal structure or an orthorhombic crystal structure. In another embodiment, the copper ions do not act as luminescent ions upon excitation with the ultraviolet or visible light.
Claims18
A luminescent material for a light emitting diode (LED), comprising:
- a compound comprising a host lattice and a luminescent ion, the luminescent ion comprising at least one rare earth element within the host lattice,
- wherein the host lattice comprises first ions and oxygen,
- wherein a portion of the first ions is substituted by copper ions, and
- wherein the compound is to emit light upon excitation with ultraviolet light or visible light, due to transitions of the direct type, f-d transitions, or charge transfer transitions.
A luminescent material for a light emitting diode (LED), comprising:
- a compound comprising a host lattice and a luminescent ion, the luminescent ion comprising at least one rare earth element within the host lattice,
- wherein the host lattice comprises first ions and oxygen,
- wherein a portion of the first ions is substituted by copper ions,
- wherein the compound is to emit light upon excitation with ultraviolet light or visible light, due to transitions of the direct type, f-d transitions, or charge transfer transitions,
- wherein the compound comprises an aluminate.
Dependencies are inferred from the claim text.