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US 12,624,280 B2Granted
Red luminescent material and conversion LED
Assigneeams-OSRAM International GmbH
InventorsMarkus Seibald, Dominik Baumann, Christiane Stoll, Hubert Huppertz, Gunter Heymann
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Abstract
A luminescent material may have an empirical formula A1-yA′yLiXF6:Mn4+, where: A=Na, K, Rb, Cs, or combinations thereof; A′=Na, K, Rb, Li, Cs, or combinations thereof; X=Si, Ti, Hf, Zr, Sn, Pb, Ge, or combinations thereof; 0≤y<1; and A and A′ are selected differently.
Claims15
A luminophore having the empirical formula A1-yA′yLiXF6:Mn4+, wherein:
- A=Na, K, Rb, Cs, or combinations thereof;
- A′=Na, K, Rb, Li, Cs, or combinations thereof;
- X=Si, Hf, Zr, Sn, Pb, Ge, or combinations thereof;
- 0≤y<1;
- and
- A and A′ are different,
- wherein the luminophore crystallizes in an orthorhombic crystal system.
4 more elements
A process for preparing a luminophore having the empirical formula A1-yA′yLiXF6:Mn4+, wherein:
- A=Na, K, Rb, Cs, or combinations thereof;
- A′=Na, K, Rb, Li, Cs, or combinations thereof;
- X=Si, Hf, Zr, Sn, Pb, Ge, or combinations thereof;
- 0≤y<1;
- and
- A and A′ are different, by a solid-state synthesis,
- wherein the luminophore crystallizes in an orthorhombic crystal system.
4 more elements
A luminophore having the empirical formula A1-yA′yLiXF6:Mn4+, wherein:
- A=Na, K, Rb, Cs, or combinations thereof;
- A′=Na, K, Rb, Li, Cs, or combinations thereof;
- X=Si, Hf, Zr, Sn, Pb, Ge, or combinations thereof;
- 0≤y<1;
- and
- A and A′ are different,
- wherein the luminophore has the empirical formula KLiSiF6:Mn4+.
4 more elements
Dependencies are inferred from the claim text.