Phosphor and method for producing the phosphor

Patent metadata

Field	Value
Publication number	US-11566174-B2
Application number	US-201716302748-A
Country	US
Kind code	B2
Filing date	Aug 10, 2017
Priority date	Aug 12, 2016
Publication date	Jan 31, 2023
Grant date	Jan 31, 2023

Abstract

A phosphor is specified. The phosphor has the general molecular formula:(MA)a(MB)b(MC)c(MD)d(TA)e(TB)f(TC)g(TD)h(TE)i(TF)j(XA)k(XB)l(XC)m(XD)n:E.In this case, MA is selected from a group of monovalent metals, MB is selected from a group of divalent metals, MC is selected from a group of trivalent metals, MD is selected from a group of tetravalent metals, TA is selected from a group of monovalent metals, TB is selected from a group of divalent metals, TC is selected from a group of trivalent metals, TD is selected from a group of tetravalent metals, TE is selected from a group of pentavalent elements, TF is selected from a group of hexavalent elements, XA is selected from a group of elements which comprises halogens, XB is selected from a group of elements which comprises O, S and combinations thereof, -E=Eu, Ce, Yb and/or Mn, XC=N and XD=C. The following furthermore hold true: a+b+c+d=t; e+f+g+h+i+j=u; k+l+m+n=v; a+2b+3c+4d+e+2f+3g+4h+5i+6j−k−2l−3m−4n=w; 0.8≤t≤1; 3.5≤u≤4; 3.5≤v≤4; (−0.2)≤w≤0.2 and 0≤m<0.875 v and/or v≥1>0.125 v.

First claim

What is claimed is:

1. A phosphor having the general molecular formula
(MA) 1 (TA) 3 (TD) 1 (XB) 4 E,

herein
MA is selected from a group of monovalent metals which comprises Li, Na, K, Rb, Cs and combinations thereof,
TA=Li,
TD=Si,
XB=O and E is selected from a group which comprises Eu, Ce, Yb, Mn and combinations thereof.

2. The phosphor as claimed in claim 1 , wherein the phosphor has a crystal structure in which TA and TD are surrounded by XB and the resultant structural units are linked via common corners and edges to form a three-dimensional spatial network having cavities or channels and MA is arranged in the cavities or channels.

3. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula:
(Na r K 1−r ) 1 (TA) 3 (TD) 1 (XB) 4 :E,

wherein 0≤r≤1.

4. The phosphor as claimed in claim 3 , wherein the phosphor crystallizes in the space group I4 1 /a, I4/m or P-1.

5. The phosphor as claimed in claim 3 , wherein 0.05<r≤0.2.

6. The phosphor as claimed in claim 3 , wherein 0.4<r≤1.

7. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (Rb r′ Li 1−r′ ) 1 (TA) 3 (TD) 1 (XB) 4 :E, wherein 0≤r′≤1.

8. The phosphor as claimed in claim 7 , wherein 0.25≤r′≤0.75.

9. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (K 1−r″−r′″ Na r″ Li r′″ ) 1 (TA) 3 (TD) 1 (XB) 4 :E, wherein 0<r″<0.5 and 0<r′″<0.5.

10. The phosphor as claimed in claim 9 , wherein the phosphor crystallizes in the space group I4/m or C2/m.

11. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (Rb r* Na 1−r* ) 1 (TA) 3 (TD) 1 (XB) 4 :E, wherein 0<r* <1.

12. The phosphor as claimed in claim 11 , wherein the phosphor crystallizes in the space group I4/m or C2/m.

13. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (Cs,Na,K,Li) 1 (TA) 3 (TD) 1 (XB) 4 :E.

14. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (Cs,Na,Rb,Li) 1 (TA) 3 (TD) 1 (XB) 4 :E.

15. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (Cs,Na,K) 1 (TA) 3 (TD) 1 (XB) 4 :E.

16. The phosphor as claimed in claim 1 , wherein the phosphor has the following general molecular formula: (Rb,Na,K) 1 (TA) 3 (TD) 1 (XB) 4 :E.

17. A method for producing a phosphor as claimed in claim 1 comprising the following method steps:
A) mixing starting materials of the phosphor,
B) heating the mixture obtained under A) to a temperature T1 of between 500 and 1400° C.,
C) annealing the mixture at a temperature T1 of 500 to 1400° C. for 0.5 minute to ten hours.

Assignees

• Osram Opto Semiconductors Gmbh
• Osram Oled Gmbh

Inventors

• Seibald Markus
• Baumann Dominik
• Fiedler Tim
• Lange Stefan
• Huppertz Hubert
• Dutzler Daniel
• Schroeder Thorsten
• Biehler Daniel
• Peschke Simon

Classifications

• C09K11/7734 Primary

  Aluminates · CPC title

• C09K11/0883 Primary

  Arsenides; Nitrides; Phosphides · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title

• Y02B20/00

  Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps · CPC title

• C09K11/77346 Primary

  Aluminium Nitrides or Aluminium Oxynitrides · CPC title