IP Library › Granted Patent US 12,195,655
Granted Patent B2
US 12,195,655 · App. 17/966,638 · Granted Jan 14, 2025

Uranium-based phosphors and compositions for displays and lighting applications

Inventors: Samuel Joseph Camardello (Ballston Spa, NY); Anant A. Setlur (Niskayuna, NY); James E. Murphy (Niskayuna, NY); Matthew David Butts (Rexford, NY)
Assignee: Dolby Intellectual Property Licensing, LLC
C09K11/771H01L33/502
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Quick Facts
Patent No.
US 12,195,655
App. No.
17/966,638
Granted
Jan 14, 2025
Kind
B2
Abstract

A phosphor composition includes an activated uranium-based phosphor having formula I or II. The phosphor is doped with Eu 3+ [Ba 1−a−b Sr a Ca b ] x [Mg,Zn] y (UO 2 ) z ([P,V]O 4 ) 2(x+y+z)/3   (I) [Ba 1−a−b Sr a Ca b ] p (UO 2 ) q [P,V] r O (2p+2q+5r)/2   (II) where 0≤a≤1, 0≤b≤1, 0.75≤x≤1.25, 0.75≤y≤1.25, 0.75≤z≤1.25, 2.5≤p≤3.5, 1.75≤q≤2.25, and 3.5≤r≤4.5 and formula II excludes the combination where a is 0, b is 0, p is 3.5, q is 1.75, and r is 3.5. Phosphor compositions further including formula VI or other luminescent materials, such as quantum dots, devices and displays are also provided.

Claims (42)

1. A phosphor composition comprising an activated uranium-based phosphor having formula I or II:

[Ba 1−a−b Sr a Ca b ] x [Mg,Zn] y (UO) 2 ) z ([P,V]O 4 ) 2(x+z)/3   (I)

[Ba 1−a−b Sr a Ca b ] p (UO 2 ) q [P,V] r O (2p+2q+5r)/2   (II),

wherein the phosphor is doped with Eu 3+ , and

wherein 0≤a≤1, 0≤b≤1, 0.75≤x≤1.25, 0.75≤y≤1.25, 0.75≤z≤1.25, 2.5≤p≤3.5, 1.75≤q≤2.25, and 3.5≤r≤4.5, with the proviso that formula II excludes the combination of a is 0, b is 0, p is 3.5, q is 1.75, and r is 3.5.

2. The phosphor composition according to claim 1 further comprising at least one other luminescent material selected from the group consisting of: additional phosphors, phosphorescent dyes, color filter pigments, polyfluorenes, metal oxide nanoparticles, scattering particles and quantum dot material, and wherein the additional phosphors is selected from the group consisting of: [Ba,Sr,Ca] 2 SiO 4 :Eu 2+ , [Y,Gd,Lu,Tb] 3 [Al,Ga] 5 O 12 :Ce 3+ , β-SiAlON:Eu 2+ , [Sr,Ca,Ba][Ga,Al] 2 S 4 :Eu 2+ , [Li,Ca]α-SiAlON:Eu 2+ , [Ba,Sr,Ca] 2 Si 5 N 8 :Eu 2+ , [Ca,Sr]AlSiN 3 :Eu 2+ , [Ba,Sr,Ca]LiAl 3 N 4 :Eu 2+ , [Sr,Ca,Mg]S:Eu 2+ , and combinations thereof.

3. The phosphor composition according to claim 2 , wherein the quantum dot material comprises perovskite quantum dots.

4. The phosphor composition according to claim 1 further comprising a red phosphor having formula VI:

A x (MF y ):Mn 4+   VI

wherein A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is an absolute value of a charge of the MF y ion; and y is 5, 6 or 7.

5. The phosphor composition according to claim 4 , wherein the red phosphor comprises:

K 2 (TiF 6 ):Mn 4+ , K 2 (SnF 6 ):Mn 4+ , Cs 2 (TiF 6 ):Mn 4+ , Rb 2 (TiF 6 ):Mn 4+ , Cs 2 (SiF 6 ):Mn 4+ , Rb 2 (SiF 6 ):Mn 4+ , Na 2 (SiF 6 ):Mn 4+ , Na 2 (TiF 6 ):Mn 4+ , Na 2 (ZrF 6 ):Mn 4+ , K 3 (ZrF 7 ):Mn 4+ , K 3 (BiF 7 ):Mn 4+ , K 3 (YF 7 ):Mn 4+ , K 3 (LaF 7 ):Mn 4+ , K 3 (GdF 7 ):Mn 4+ , K 3 (NbF 7 ):Mn 4+ or K 3 (TaF 7 ):Mn 4+ .

6. The phosphor composition according to claim 4 , wherein the red phosphor is K 2 SiF 6 :Mn 4+ .

7. The phosphor composition according to claim 4 , wherein the red phosphor is at least partially coated with a surface coating comprising a metal fluoride or a silica.

8. The phosphor composition according to claim 7 , wherein the metal fluoride is selected from the group consisting of MgF 2 , CaF 2 , SrF 2 , BaF 2 , AgF, ZnF 2 , AlF 3 , and a combination thereof.

9. A device comprising an LED light source radiationally and/or optically coupled to the phosphor composition according to claim 1 .

10. The device according to claim 9 , wherein the LED light source is a mini LED or a micro LED.

11. The device according to claim 9 , wherein the LED light source emits blue light or UV light.

12. A lighting apparatus comprising the device of claim 9 .

13. A backlight apparatus comprising the device of claim 9 .

14. A television comprising the backlight apparatus of claim 13 .

15. A mobile phone comprising the backlight apparatus of claim 13 .

16. A computer monitor comprising the backlight apparatus of claim 13 .

17. A laptop comprising the backlight apparatus of claim 13 .

18. A tablet computer comprising the backlight apparatus of claim 13 .

19. An automotive display comprising the backlight apparatus of claim 13 .

20. A horticulture lighting apparatus comprising the device of claim 9 .

21. The phosphor composition according to claim 1 , wherein the phosphor is selected from the group consisting of: Ba 3 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , BaZnUO 2 (PO 4 ) 2 , and BaMgUO 2 (PO 4 ) 2.

22. The phosphor composition according to claim 1 , wherein the phosphor has a D50 particle size from about 0.1 μm to about 15 μm.

23. The phosphor composition according to claim 4 , wherein the activated uranium-based phosphor is selected from the group consisting of: Ba 3 (PO 4 ) 2 (UO 2 ) 2 P 2 O 7 , BaZnUO 2 (PO 4 ) 2 , and BaMgUO 2 (PO 4 ) 2.

24. The phosphor composition according to claim 4 , wherein the activated uranium-based phosphor and the red phosphor have a D50 particle size from about 0.1 μm to about 15 μm.

25. The phosphor composition according to claim 4 further comprising at least one other luminescent material selected from the group consisting of: additional phosphors, phosphorescent dyes, color filter pigments, polyfluorenes, metal oxide nanoparticles, scattering particles and quantum dot material, and wherein the additional phosphors is selected from the group consisting of: [Ba,Sr,Ca] 2 SiO 4 :Eu 2+ , [Y,Gd,Lu, Tb] 3 [Al,Ga] 5 O 12 :Ce 3+ , β-SiAlON:Eu 2+ , [Sr,Ca,Ba][Ga,Al] 2 S 4 :Eu 2+ , [Li,Ca]α-SiAlON:Eu 2+ , [Ba, Sr, Ca] 2 Si 5 N 8 :Eu 2+ , [Ca,Sr] AlSiN 3 : Eu 2+ , [Ba,Sr,Ca]LiAl 3 N 4 :Eu 2+ , [Sr,Ca,Mg] S:Eu 2+ , and combinations thereof.

26. The phosphor composition according to claim 25 , wherein the quantum dot material comprises perovskite quantum dots.

27. The device according to claim 9 , wherein the LED light source comprises an LED chip on which the phosphor composition is deposited.

28. The device according to claim 27 , wherein the phosphor composition is deposited on the LED chip in a form of an ink or slurry composition.

29. The device according to claim 27 , wherein the phosphor composition is in a form of a film.

30. The device according to claim 29 , wherein the film is a single layer or multilayered structure.

31. The device according to claim 30 , wherein the phosphor composition further comprises quantum dot material and the film is a multilayered structure, wherein each layer of the multilayered structure comprises at least one phosphor or quantum dot material.

32. The device according to claim 9 , wherein the phosphor composition is in a form of a film and is located remotely from the LED light source.

33. The device according to claim 31 , wherein at least one layer comprises a red phosphor having formula VI:

Ax(MFy):Mn 4+ VI

wherein A is Li, Na, K, Rb, Cs, or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Hf, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; x is an absolute value of a charge of the MFy ion; and y is 5, 6 or 7.

Assignments (4)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 20, 2025
From: DOLBY INTELLECTUAL PROPERTY LICENSING, LLC
To: EDISON INNOVATIONS, LLC
Reel/Frame 070293/0273 →
CHANGE OF NAME Recorded Dec 4, 2024
From: GE INTELLECTUAL PROPERTY LICENSING, LLC
To: DOLBY INTELLECTUAL PROPERTY LICENSING, LLC
Reel/Frame 069490/0315 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 31, 2024
From: GENERAL ELECTRIC COMPANY
To: GE INTELLECTUAL PROPERTY LICENSING, LLC
Reel/Frame 069095/0458 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jun 12, 2023
From: CAMARDELLO, SAMUEL JOSEPH; SETLUR, ANANT A.; MURPHY, JAMES E.; BUTTS, MATTHEW DAVID
To: GENERAL ELECTRIC COMPANY
Reel/Frame 063923/0692 →
Continuity (4)
Continuation PCTUS2022024577 · Apr 13, 2022
Continuation In Part PCTUS2021027105 · Apr 13, 2021
Provisional Application 63254021 · Oct 8, 2021
Related Publication 20230287265A1 · Sep 14, 2023
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