LUMINESCENT MATERIAL

• US 20190153314A1
• Filed: 05/23/2016
• Published: 05/23/2019
• Est. Priority Date: 05/09/2016
• Status: Active Grant

• Current Assignee: Turun yliopisto
• Original Assignee: Turun yliopisto
• Inventors: LASTUSAARI, Mika, NORRBO, Isabella
• Granted Patent: US 10,640,704 B2
• Time in Patent Office: Days
• CPC Class Codes: C09K 11/646 Silicates
• CPC Class Codes: C09K 11/676 Aluminates; Silicates
• CPC Class Codes: C09K 11/77344 Aluminosilicates
• CPC Class Codes: C09K 9/00 Tenebrescent materials, i.e. materials for which the range of wavelengths for energy absorption is changed as a result of excitation by some form of energy
• CPC Class Codes: G01T 1/06 Glass dosimeters using colour change; including plastic dosimeters
• CPC Class Codes: G01T 1/1606 with other specified detectors not provided for in the other sub-groups of G01T1/16 see provisionally also G01T1/16
• CPC Class Codes: H01L 33/502 Wavelength conversion materials
• CPC Class Codes: Y02B 20/00 Energy efficient lighting technologies, e.g. halogen lamps or gas discharge lamps

Abstract

The invention relates to a material represented by the following formula (I)

(M′)₈(M″M′″)₆O₂₄(X,X′)₂:M″″

formula (I).

Further, the invention relates to a luminescent material, to different uses, and to a device.

Claims

1-23. -23. (canceled)

24. A material represented by the following formula (I)

(M′

)₈(M″

M′

″

)₆O₂₄(X,X′

)₂;

M″

″

formula (I)

wherein

M′

represents

a monoatomic cation of Li, or a monoatomic cation of K, or a monoatomic cation of Rb;

or

a combination of at least two monoatomic cations of different alkali metals selected from Group 1 of the IUPAC periodic table of the elements, wherein the combination comprises 0-98 mol-% of the monoatomic cation of Na;

M″

represents a trivalent monoatomic cation of an element selected from Group 13 of the IUPAC periodic table of the elements, or of a transition element selected from any of n Groups 3-12 of the IUPAC periodic table of the elements, or any combination of such cations;

M″

′

represents a monoatomic cation of an element selected from Group 14 of the IUPAC periodic table of the elements, or of an element selected from any of Groups 13 and 15 of the IUPAC periodic table of the elements, or of Zn, or any combination of such cations;

X represents an anion of an element selected from Group 17 of the IUPAC periodic table of the elements, or any combination of such anions, or wherein X is absent;

X′

represents an anion of an element selected from Group 16 of the IUPAC periodic table of the elements, or any combination of such anions, or wherein X′

is absent; and

M″

″

represents a dopant cation of an element selected from transition metals of the IUPAC periodic table of the elements, or any combination of such cations;

with the proviso that at least one of X and X′

is present.

25. The material of claim 24, wherein M′

represents a combination of at least two monoatomic cations of different alkali metals selected from a group consisting of Li, Na, K, and Rb.

26. The material of claim 24, wherein M′

represents a monoatomic cation of an alkali metal selected from a group consisting of Li, K, and Rb, or any combination of such cations.

27. The material of claim 24, wherein M′

represents a combination of a monoatomic cation of Na with a monoatomic cation of Li, a monoatomic cation of K and/or a monoatomic cation of Rb.

28. The material of claim 24, wherein M″

represents a trivalent monoatomic cation of a metal selected from a group consisting of Al and Ga, or a combination of such cations.

29. The material of claim 24, wherein M″

represents a trivalent monoatomic cation of B.

30. The material of claim 24, wherein M″

′

represents a monoatomic cation of an element selected from a group consisting of Si and Ge, or a combination of such cations.

31. The material of claim 24, wherein M″

′

represents a monoatomic cation of an element selected from a group consisting of Al, Ga, N, P, and As, or any combination of such cations.

32. The material of claim 24, wherein X represents an anion of an element selected from a group consisting of F, Cl, Br, and I, or any combination of such anions.

33. The material of claim 24, wherein X′

represents an anion of an element selected from a group consisting of O, S, Se, and Te, or any combination of such anions.

34. The material of claim 24, wherein M″

″

represents a cation of an element selected from a group consisting of Ti, V, Cr, Mn, Fe, Co, Ni, Cu, and Zn, or any combination of such cations.

35. The material of claim 24, wherein the material is selected from a group consisting of (Li,Na)₈(Al Si)₆O₂₄(Cl,S)₂:

Ti (Na,K)₈(Al Si)₆O₂₄(Cl,S)₂;

Ti, and (Na,Rb)₈(AlSi)₆O₂₄(Cl,S)₂;

Ti.

36. A luminescent material, characterized in that the material is a material as defined in claim 24.

37. The luminescent material of claim 36, wherein the luminescent material is a white light-emitting material.

38. The luminescent material of claim 36, wherein the material is configured to be persistent for at least 50 hours, or at least 55 hours, or at least 60 hours, or at least 65 hours.

39. A device, characterized in that the device comprises a material as defined in claim 24.

40. The device of claim 39, wherein the device is a lighting arrangement.

41. The device of claim 39, wherein the device is a light emitting device, a display element, or a fluorescent tube.

42. Use of the material as defined in claim 24 in a security device.

43. Use of the material as defined in claim 24 in imaging or in diagnostics.

44. The material as defined in claim 24 for use in diagnostics.