Films with narrow band emission phosphor materials

Patent metadata

Field	Value
Publication number	US-2022177719-A1
Application number	US-202117552648-A
Country	US
Kind code	A1
Filing date	Dec 16, 2021
Priority date	Apr 14, 2020
Publication date	Jun 9, 2022
Grant date	—

Abstract

A color conversion film is provided. The film includes at least one narrow band emission phosphor dispersed within a binder matrix, wherein the narrow band emission phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U6+-containing phosphor, a green-emitting Mn2+-containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn4+, and a mixture thereof. A device is also provided.

First claim

1 - 30 . (canceled)

31 . A film comprising at least one phosphor dispersed within a binder matrix, wherein the phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U 6+ -containing phosphor, a green-emitting Mn 2+ -containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , and a mixture thereof, wherein the film is a single layer or has multiple layers.

32 . The film according to claim 31 , wherein the at least one phosphor has a D50 particle size from about 0.1 μm to about 3 μm or from about 3 μm to about 8.5 μm.

33 . The film according to claim 31 , wherein the green-emitting U 6+ -containing phosphor is selected from the group consisting of: y-Ba 2 UO 2 (PO 4 ) 2 , Ba[Mg,Zn]UO 2 (PO 4 ) 2 , Ba 6 Al 5 P 5 O 26 :U 6+ , Ba(UO 2 )P 2 O 7 , Ba 3 (UO 2 ) 2 P 2 O 7 (PO 4 ) 2 , and combinations thereof, and
the green-emitting Mn 2+ -containing phosphor is selected from the group consisting of: ((CH 3 ) 4 N)MnX 3 , where X=Br or Cl; [MEA]-(MnX 4 ) 2 , where X=Br or Cl and [MEA]=((CH 3 ) 4 N(C 2 H 5 ) 4 N) 2 NH 4 ; (OP-Ph 3 ) 2 MnBr 2 , where Ph=phenyl; (OP(N-Me 2 ) 3 ) 2 MnX 2 , where X=Cl or Br and Me=methyl; (OP-Ph-(N-Me 2 ) 2 ) 2 MnX 2 , where X=C1 or Br, Ph=phenyl and Me=Methyl; [DPEPO]—MnX 2 , where X=Cl, Br or I and [DPEPO]=bis[2-(diphenylphosphino)-phenyl]ether-oxide; [DBFDPO]—MnX 2 , where X=Cl or Br and [DBFDPO]=4,6-bis(diphenylphosphoryl)dibenzofuran; C 11 H 22 N2MnCl 4 ; C 4 H 10 NMnBr 3 ; and A 2 MnX 4 , where X=Br, Cl or I, and when X=Br, then A=Et 4 -N, Pr 4 —N, Bz-Bu 3 -N, Ph-Me 3 -N, Ph 4 -P, Me-Ph 3 -P, Et-Ph 3 -P, Bz-Me 3 -N, K(crypt-222), Pr-Me 3 -N, Me-P-Ph 3 -Br, Pr-Me 3 -NBr, P 14 , PP 14 , C 2 H 10 N 2 Br, C 10 H 16 N, Btz, Bn-P-Ph 3 , C n mim (n=1,2,3), K(dibenzo-18-crown-6), Bn-Me 3 -N, Bn-Et 3 -N, Bn-(C 5 H 5 N), C 6 H 14 N, C 5 H 5 N, and C 4 H 10 N, and when X=Cl, then A=Et 4 -N, Pr 4 —N, Bz-Bu 3 -N, Ph-Me 3 -N, Ph 4 -P, Et-Ph 3 -P, Bz-Me 3 -N, (P-Ph 3 ) 2 N, Btz, Bn-P-Ph 3 , C n mim (n=1,2,3), K(dibenzo-18-crown-6), and C 4 NOH 10 , and when X=I, then A=Et 4 -N, Pr 4 —N, Ph-Me 3 -N, Bz-Me 3 -N, and C 4 H 10 N; where Bz=benzoyl, Bn=benzyl, Pr=propyl, Me=methyl, Et=ethyl, Bu=butyl, Btz=Benzothiazole, Cnmim=n-alkyl-methylimidazolium and Ph=phenyl.

34 . The film according to claim 31 further comprising one or more materials selected from the group consisting of quantum dot materials, additional phosphors, phosphorescent dyes, color filter pigments, metal oxide nanoparticles, scattering particles, and mixtures thereof.

35 . The film according to claim 34 further comprising quantum dot materials, wherein the quantum dot materials comprise perovskite quantum dots.

36 . The film according to claim 31 , wherein the film further comprises an additional phosphor selected from (Y,Gd,Tb,La,Sm,Pr,Lu) 3 (A,Ga) 5−a O 12−3/2a :Ce 3+ (wherein 0≤a≤0.5); beta-SiAlON:Eu 2+ ; (Sr,Ca,Ba)(Al,Ga,In) 2 S 4 :Eu 2+ ; alpha-SiAlON doped with Eu 2+ and/or Ce 3+ ; Ca 1−h−r Ce h Eu r Al 1−h( Mg,Zn) h SiN 3 (where 0≤h≤0.2, 0≤r≤0.2); Sr(LiAl 3 N4):Eu 2+ ; (Ca,Sr)S:Eu 2+ , Ce 3+ ; (Ba,Sr,Ca) b Si g N m :Eu 2+ (wherein 2b+4g=3m); and combinations thereof.

37 . The film according to claim 31 , wherein the at least one phosphor is the red-emitting phosphor based on complex fluoride materials activated by Mn 4+ and the red-emitting phosphor is at least partially coated with a surface coating comprising a metal fluoride, silica or organic coating.

38 . The film according to claim 37 , wherein the surface coating is a metal fluoride selected from the group consisting of MgF 2 , CaF 2 , SrF 2 , BaF 2 , AgF, ZnF 2 , AlF 3 , and a combination thereof.

39 . The film according to claim 31 , wherein the at least one phosphor comprises the green-emitting U 6+ -containing phosphor or the green-emitting Mn 2+ -containing phosphor, and the film further comprises an additional phosphor selected from (Y,Gd,Tb,La,Sm,Pr,Lu) 3 (Al,Ga) 5−a O 12−3/2a :Ce 3+ (wherein 0≤a≤0.5); beta-SiAlON:Eu 2+ ; (Sr,Ca,Ba)(Al,Ga,In) 2 S 4 :Eu 2+ ; alpha-SiAlON doped with Eu 2+ and/or Ce 3+ ; Ca 1−h−r Ce h Eu r Al 1−h( Mg,Zn) h SiN 3 , (where 0≤h≤0.2, 0≤r≤0.2); Sr(LiAl 3 N 4 ):Eu 2+ ; (Ca,Sr)S:Eu 2+ ,Ce 3+ ; (Ba,Sr,Ca) b Si g N m :Eu 2+ (wherein 2b+4g=3m); and combinations thereof.

40 . A film comprising a red-emitting phosphor dispersed within a binder matrix, wherein the red-emitting phosphor has a D50 particle size from about 0.1 μm to about 3 μm or from about 3 μm to about 8.5 μm, wherein the red-emitting phosphor comprises formula I and is at least partially coated with a surface coating comprising a metal fluoride, silica or organic coating, and wherein the film is a single layer or has multiple layers,
A x MF y :Mn 4+    I

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.

41 . The film according to claim 40 , wherein the surface coating is a metal fluoride selected from the group consisting of MgF 2 , CaF 2 , SrF 2 , BaF 2 , AgF, ZnF 2 , AlF 3 , and a combination thereof.

42 . The film according to claim 40 , wherein formula I is K 2 SiF 6 :Mn 4+ or Na 2 SiF 6 :Mn 4+ .

43 . The film according to claim 40 further comprising one or more materials selected from the group consisting of quantum dot materials, additional phosphors, phosphorescent dyes, color filter pigments, metal oxide nanoparticles, scattering particles, and mixtures thereof.

44 . The film according to claim 43 further comprising quantum dot materials, wherein the quantum dot materials comprise perovskite quantum dots.

45 . The film according to claim 40 , wherein the film comprises one or more additional phosphors selected from (Y,Gd,Tb,La,Sm,Pr,Lu) 3 (Al,Ga) 5−a O 12−3/2a: Ce 3+ (wherein 0≤a≤0.5); beta-SiAlON:Eu 2+ ; (Sr,Ca,Ba)(Al,Ga,In) 2 S4:Eu 2+ ; alpha-SiAlON doped with Eu 2+ and/or Ce 3+ ; Ca 1−h−r Ce h Eu r Al 1−h( Mg,Zn) h SiN 3 , (where 0≤h≤0.2, 0≤r≤0.2); Sr(LiAl 3 N4):Eu 2+ ; (Ca,Sr)S:Eu 2+ ,Ce 3+ ; (Ba,Sr,Ca) b Si g N m :Eu 2+ (wherein 2b+4g=3m); and combinations thereof.

46 . A device comprising an LED light source optically coupled and/or radiationally connected to a film comprising at least one phosphor dispersed within a binder matrix, wherein the phosphor has a D50 particle size from about 0.1 μm to about 15 μm and is selected from the group consisting of a green-emitting U 6+ -containing phosphor, a green-emitting Mn 2+ -containing phosphor, a red-emitting phosphor based on complex fluoride materials activated by Mn 4+ , and a mixture thereof, wherein the film is a single layer or has multiple layers.

47 . A backlight apparatus comprising the device according to claim 46 .

48 . A lighting apparatus comprising the device according to claim 46 .

49 . A television comprising the backlight apparatus of claim 47 .

50 . A mobile phone comprising the backlight apparatus of claim 47 .

51 . A computer monitor comprising the backlight apparatus of claim 47 .

52 . An automotive display comprising the backlight apparatus of claim 47 .

53 . A tablet computer comprising the backlight apparatus of claim 47 .

54 . A laptop comprising the backlight apparatus of claim 47 .

55 . The device according to claim 46 , wherein the LED light source compri

Assignees

• Gen Electric

Inventors

• Doherty Mark D
• Liang Yangang
• Liu Jie Jerry
• Camardello Samuel Joseph
• Murphy James Edward

Classifications

• H10H20/8513 Primary

  having two or more wavelength conversion materials · CPC title

• H10H20/882

  Scattering means (H10H20/82 takes precedence) · CPC title

• H10H20/8512

  Wavelength conversion materials · CPC title

• H10H20/8514

  characterised by their shape, e.g. plate or foil · CPC title

• C09D11/50

  Sympathetic, colour changing or similar inks · CPC title