Phosphor, illumination device and use of an illumination device

Patent metadata

Field	Value
Publication number	US-10519371-B2
Application number	US-201716324924-A
Country	US
Kind code	B2
Filing date	Nov 10, 2017
Priority date	Nov 11, 2016
Publication date	Dec 31, 2019
Grant date	Dec 31, 2019

Abstract

A luminescent material may include the formula (MB) (TA)3−2x(TC)1+2xO4−4xN4x:E where 0<x<0.875. —TA may be selected from a group of monovalent metals, such as Li, Na, Cu, Ag, and combinations thereof. —MB may be selected from a group of divalent metals including Mg, Ca, Sr, Ba, Zn, and combinations thereof. —TC may be selected from a group of trivalent metals including B, Al, Ga, In, Y, Fe, Cr, Sc, rare earth metals, and combinations thereof. —E may be selected from a group including Eu, Mn, Ce, Yb, and combinations thereof.

First claim

The invention claimed is:

1. A phosphor having the formula (MB)Li 2 Al 2 O 2 N 2 :E where MB is selected from a group of divalent metals consisting of Mg, Ca, Sr, Ba, Zn, and combinations thereof; and wherein E is selected from a group consisting of Eu, Mn, Ce, Yb, and combinations thereof.

2. The phosphor as claimed in claim 1 ,
which emits electromagnetic radiation in the red spectral region.

3. The phosphor as claimed in claim 1 ,
which has an emission spectrum having a maximum peak wavelength of 614 nm+/−10 nm and/or a half-height width of less than 60 nm.

4. The phosphor as claimed in claim 3 ,
wherein the half-height width is less than 55 nm.

5. The phosphor as claimed in claim 1 ,
wherein the phosphor does not crystallize in the crystal structure of the UCr 4 C 4 type.

6. The phosphor as claimed in claim 1 ,
wherein MB is Ca, Sr, Ba, or a combination thereof.

7. The phosphor as claimed in claim 1 ,
wherein MB is Sr.

8. The phosphor as claimed in claim 1 ,
wherein E is Eu.

9. The phosphor as claimed in claim 1 ,
wherein the phosphor is excitable at least with radiation from the UV and/or blue spectral region.

10. A lighting device comprising a phosphor as claimed in claim 1 .

11. The lighting device as claimed in claim 10 further comprising:
a semiconductor layer sequence set up to emit electromagnetic primary radiation; and
a conversion element which comprises the phosphor and at least partly converts the electromagnetic primary radiation to electromagnetic secondary radiation.

12. The lighting device as claimed in claim 11 ,
wherein the phosphor fully converts the electromagnetic primary radiation to electromagnetic secondary radiation, such that the overall radiation from the lighting device is selected from the red wavelength range.

13. The lighting device as claimed in claim 11 , wherein the conversion element comprises a second phosphor configured to emit radiation from the green spectral region, and a third phosphor configured to emit radiation from the red spectral region.

14. The lighting device as claimed in claim 11 ,
in the form of a lamp for a motor vehicle.

15. The lighting device as claimed in claim 11 ,
wherein the overall radiation from the lighting device is white mixed radiation.

16. A method for backlighting of display devices comprising the lighting device of claim 11 .

17. The phosphor as claimed in claim 1 ,
wherein the phosphor crystallizes in the tetragonal P4 2 /m space group.

18. The phosphor as claimed in claim 1 ,
wherein MB is Sr and E is Eu such that the phosphor has the formula SrLi 2 Al 2 O 2 N 2 :Eu.

Assignees

• Osram Opto Semiconductors Gmbh

Inventors

• Seibald Markus
• Baumann Dominik
• Schroeder Thorsten
• Lange Stefan
• Hoerder Gregor
• Achrainer Gina Maya
• Huppertz Hubert
• Peschke Simon
• Marchuk Alexey
• Schmid Philipp
• Hummel Franziska
• Dirksmeyer Stephanie

Classifications

• C09K11/0883 Primary

  Arsenides; Nitrides; Phosphides · CPC title

• C09K11/7734 Primary

  Aluminates · CPC title

• H01L33/502

  Electricity · mapped topic

• C09K11/77346 Primary

  Aluminium Nitrides or Aluminium Oxynitrides · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title