Phosphor and light source comprising such a phosphor
AssigneePatent-Treuhand-Gesellschaft fuer elektrische Gluehlampen mbH
InventorsTim Fiedler, Torsten Fries, Frank Jermann, Martin Zachau, Franz Zwaschka
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Abstract
A phosphor with a garnet structure is distinguished by the addition of Si. It is suitable in particular for photon excitation by light sources with an emission between 250 and 550 nm.
Claims24
A phosphor with a garnet structure and having a composition represented by a formula [A3−aKAa]A[B5−b−xKBbSix]B[O12−sKCs]O:D wherein A is a rare earth, B is selected from Al, Ga or a combination thereof, part of B is replaced by Si in a proportion x, D is a rare earth, and KA, KB, KC are charge-compensating components located at lattice sites A, B and O, respectively;
- and in which the following relationship applies:
- a(mKA−3)+b(mKB−3)+x=s(−mKC−2), where m is the valence of the incorporated ion of the charge-compensating components and s>0.
A phosphor with a garnet structure and having a composition represented by a formula A3−x/3B5−xSixO12:D wherein A is a rare earth, B is selected from Al, Ga or a combination thereof, part of B is replaced by Si in a proportion x, and D is a rare earth.
A phosphor with a garnet structure and having a composition represented by a formula A3B5−xSix[O12−sNs]O:D wherein A is a rare earth, B is selected from Al, Ga or a combination thereof, part of B is replaced by Si in a proportion x, D is a rare earth and 0<s≦2x.
Dependencies are inferred from the claim text.