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US 2017/0306223 A1Published application
Phosphors
AssigneeMerck Patent GmbH
InventorsRalf PETRY, Holger WINKLER, Thomas JUESTEL, Tobias DIERKES
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Abstract
The present invention relates to europium-, cerium-, samarium- or praseodymium-doped boronitrides, to a process for the preparation of these compounds, and to the use of the doped boronitrides according to the invention as conversion phosphors. The present invention furthermore relates to a light source which contains a doped boronitride according to the invention.
Claims15
Compound of the formula (1) which is doped with europium, cerium, samarium and/or praseodymium, where the degree of doping is up to 10 mol %,
- Aa(EA)b(Ln)cBeN2e+fOg(BNO)h(Hal)i formula (1)
- where the following applies to the symbols and indices used:
- A are one or more elements selected from the group consisting of Li, Na and K;
- EA are one or more elements selected from the group consisting of Mg, Ca, Sr and Ba;
- Ln are one or more elements selected from the group consisting of Sc, Y, La, Gd and Lu;
- Hal are one or more elements selected from the group consisting of F, Cl, Br and I;
- 0≦a≦3;
- 0≦b≦5;
- 0≦c≦6;
- 1≦e≦4;
- 0≦f≦2;
- 0≦g≦6;
- 0≦h≦1;
- 0≦i≦1;
- where the following applies to the indices:
- a+2b+3c=3e+3f+2g+2h+i;
- 2≦a+b+c≦6;
- 2≦e+f+g+h+i≦6;
- the compound Ca2BN2F:Eu is excluded from the invention.
16 more elements
Dependencies are inferred from the claim text.