Phosphor, method for producing a phosphor and use of a phosphor

Patent metadata

Field	Value
Publication number	US-9725646-B2
Application number	US-201615342297-A
Country	US
Kind code	B2
Filing date	Nov 3, 2016
Priority date	Oct 8, 2013
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

Abstract

A phosphor is disclosed. In an embodiment a phosphor includes an inorganic substance which includes, in its composition, at least an element D, an element A1, an element AX, an element SX and an element NX where D includes one, two or more elements selected from the group consisting of Mn, Ce, Pr, Nd, Sm, Eu, Tb, Dy, Ho, Er, Tm, alkali metals and Yb, A1 includes one, two or more elements selected from the group consisting of divalent metals not included in D, SX includes one, two or more elements selected from the group consisting of tetravalent metals, AX includes one, two or more elements selected from the group consisting of trivalent metals, and NX includes one, two or more elements selected from the group consisting of O, N, S, C, Cl, and F, wherein the inorganic substance has the same crystal structure as Sr(Sr a Ca 1-a )Si 2 Al 2 N 61 .

First claim

What is claimed is:

1. A phosphor for emission of red light, wherein the phosphor has the formula:
Sr x Ca 1-x AlSiN 3 :Eu,
wherein x is: 0.85<x≦0.95,
wherein between 0.35% and 2.2% inclusive of Sr, Ca and/or Sr/Ca lattice sites are replaced by Eu, and
wherein, in a x-ray structure analysis, the phosphor in orthorhombic description exhibits a reflection (R) having the Miller indices 1 2 1.

2. The phosphor according to claim 1 , wherein the phosphor exhibits, in a powder diffractogram on monochromatic irradiation with Cu-K α1 radiation, the reflection (R) having the Miller indices 1 2 1 at 2θ between 36.7° and 37.0°.

3. The phosphor according to claim 2 , wherein the reflection (R), based on a main reflection, exhibits an intensity between 0.3% and 8% inclusive.

4. The phosphor according to claim 1 , wherein the phosphor has a dominant wavelength between 596 nm and 606 nm inclusive, wherein a breadth of a radiation spectrum emitted by the phosphor at half a maximum height is between 75 nm and 87 nm inclusive, and wherein the phosphor has a relative absorption maximum in a wavelength range between 410 nm and 450 nm inclusive and, when induced, is configured to emit radiation with blue light.

5. A phosphor for emission of red light, wherein the phosphor has the formula:
Sr x Ca 1-x AlSiN 3 :Eu,
wherein x is: 0.8<x≦1,
wherein between 0.1% and 5% inclusive of Sr, Ca and/or Sr/Ca lattice sites are replaced by Eu, and
wherein, in an x-ray structure analysis, the phosphor in orthorhombic description exhibits a reflection (R) having the Miller indices 1 2 1, wherein, in a powder diffractogram on monochromatic irradiation with Cu-K α1 radiation, the reflection (R) having the Miller indices 1 2 1 at 2θ between 36.7° and 37.0°, and wherein the reflection (R), based on a main reflection, exhibits an intensity between 0.3% and 8% inclusive.

6. A phosphor for emission of red light, wherein the phosphor has the formula:
Sr x Ca 1-x AlSiN 3 :Eu,
wherein x is: 0.8<x≦1,
wherein between 0.1% and 5% inclusive of Sr, Ca and/or Sr/Ca lattice sites are replaced by Eu, and
wherein, in an x-ray structure analysis, the phosphor in orthorhombic description exhibits a reflection (R) having the Miller indices 1 2 1, wherein the phosphor has a dominant wavelength between 596 nm and 606 nm inclusive, wherein a breadth of a radiation spectrum emitted by the phosphor at half a maximum height is between 75 nm and 87 nm inclusive, and wherein the phosphor has a relative absorption maximum in a wavelength range between 410 nm and 450 nm inclusive and, when induced, is configured to emit radiation with blue light.

Assignees

• Osram Opto Semiconductors Gmbh
• Osram Gmbh

Inventors

• Fiedler Tim
• Bichler Daniel
• Lange Stefan
• Römer Rebecca
• Jermann Frank
• Thienel Frauke
• Huckenbeck Barbara
• Baumgartner Alexander
• Stöppelkamp Vera
• Bönisch Norbert
• Cui Hailing

Classifications

• H10W90/756

  between a chip and a stacked lead frame, conducting package substrate or heat sink · CPC title

• H10W72/884

  Die-attach connectors and bond wires · CPC title

• C09K11/646 Primary

  Silicates · CPC title

• C09K11/7728

  containing europium · CPC title

• C09K11/0883

  Arsenides; Nitrides; Phosphides · CPC title