Phosphors and phosphor-converted LEDs
AssigneeMerck Patent GmbH
InventorsAleksander Zych, Mathias Rapphahn, Ralf Petry, Ingo Koehler, Andreas Benker, Stefan Tews
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Abstract
The present invention relates to alkaline earth aluminate phosphors, to a process for the preparation thereof and to the use thereof as conversion phosphors. The present invention also relates to an emission-converting material comprising at least the conversion phosphor according to the invention, and to the use thereof in light sources, in particular pc-LEDs (phosphor converted light emitting devices). The present invention furthermore relates to light sources, in particular pc-LEDs, and to lighting units which comprise a primary light source and the emission-converting material according to the invention.
Claims17
Compound of formula (1a),
- (AE)a-d-vDdM1b-eMe2M3vEc-eXxNe+v Formula (1a)
- where the following applies to the symbols and indices used:
- AE is Ca, Sr, Ba or mixtures thereof;
- D is Eu, Mn, Yb, Sm, Ce or mixtures thereof;
- M1 is B, Al, Ga, In, TI, Sc or mixtures thereof;
- M2 is C, Si, Ge, Sn or mixtures thereof;
- M3 is Y, Lu, La or mixtures thereof;
- E is O, S, Se, Te or mixtures thereof;
- X is F, Cl, Br, I or mixtures thereof;
- N is a trivalent nitride ion;
- 0.65≤a≤1;
- 0≤v≤0.1a where a is as defined above;
- 10.667≤b≤11.133;
- 17.00≤c≤17.35;
- 0<d≤1;
- 0≤x≤5;
- 0≤e≤5;
- 0.0584≤a/b≤0.0938;
- 0.0375≤a/c≤0.0588;
- 2a+3b=2c+x;
- with the proviso that x≠0 or v≠0 or e≠0 when AE=Ba and M1=Al.
The compound according to claim 1, wherein the compound is selected from the compounds of the formulae (2′) to (11′),
- (Ba1-zSrz)a-dEudM1b-eM2eEc-eXxNe Formula (2′)
- (Ba1-zSrz)a-d(Eu,Mn)dM1b-eM2eEc-eXxNe Formula (3′)
- (Ba1-zCaz)a-dEudM1b-eM2eEc-eXxNe Formula (4′)
- (Ba1-zCaz)a-d(Eu,Mn)dM1b-eM2eEc-eXxNe Formula (5′)
- Baa-d-vEudM1b-eM2eM3v Ec-eXxNe+v Formula (6′)
- Baa-d-v(Eu,Mn)dM1b-eM2eM3vEc-eXxNe+v Formula (7′)
- (AE)a-d-vDd(Al1-wBw)b-eM2eM3vEc-eXxNe+v Formula (8′)
- (AE)a-d-vDd(Al1-wGaw)b-eM2eM3vEc-eXxNe+v Formula (9′)
- (AE)a-d-vDd(Al1-wInw)b-eM2eM3vEc-eXxNe+v Formula (10′)
- (AE)a-d-vDd(Al1-wScw)b-eM2eM3vEc-eXxNe+v Formula (11′)
- where the symbols and indices have the meanings given in claim 1 and
- 0<d≤1;
- 0≤z≤0.1;
- and
- 0≤w≤0.1.
Dependencies are inferred from the claim text.