Luminophore and light source containing such a luminophore

Patent metadata

Field	Value
Publication number	US-9263221-B2
Application number	US-201013518813-A
Country	US
Kind code	B2
Filing date	Nov 24, 2010
Priority date	Dec 22, 2009
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A luminophore from the class of nitridic or oxynitridic luminophores with at least one cation M and an activator D, wherein a proportion x of the cation is replaced with Cu and D is at least one element from the series Eu, Ce, Sm, Yb and Tb

First claim

The invention claimed is:

1. A luminophore from the class of nitridic or oxynitridic luminophores with at least one cation M or Ca and an activator D, wherein
the luminophore has one of the following formula:
(Ca 1-z Sr z ) 1-x Cu x AlSiN 3 :D,(Ca 1-y Ba y ) 1-x Cu x AlSiN 3 :D, M 2-x Cu x Si 5 N 8 :D, M 1-x Cu x Si 2 N 2 O 2 :D with M being at least one of Sr, Ca, Ba, with z=06-0.9 and y =0-0.3 and with D being Eu alone or in conjunction with another activator which is at least one element from the series Ce, Sm, Yb and Tb, and
a proportion x of the cation is replaced with Cu and D wherein the proportion x of Cu in
(Ca 1-z Sr z ), (Ca 1-y Ba y ) or M lies in the range of 0.05 mol % to 5 mol %.

2. The luminophore as claimed in claim 1 , wherein the proportion of the activator D lies in the range of 0.2 mol % to 15 mol %.

3. The luminophore as claimed in claim 1 , wherein the proportion of Cu in (Ca 1-z Sr z ), (Ca 1-y Ba y ) or M lies in the range of 0.2 mol % to 5 mol %.

4. A light source comprising a luminophore as claimed in claim 1 .

5. The light source as claimed in claim 4 , wherein the light source is a conversion-type LED, a fluorescent lamp or a high pressure discharge lamp.

6. A conversion-type LED having a chip which emits primary radiation, and a layer containing a luminophore arranged in front of the chip, said layer converting at least part of the primary radiation of the chip into secondary radiation, wherein said luminophore is a first luminophore as claimed in claim 1 .

7. The conversion-type LED as claimed in claim 6 , wherein (Q) 3 (T) 5 O 12 :Ce is used as a further luminophore to produce white, wherein Q is at least one of Lu, Y, and Gd and T is at least one of Al and Ga,.

Assignees

• Fiedler Tim
• Jermann Frank
• Strauss Jörg
• Osram Opto Semiconductors Gmbh

Inventors

• Fiedler Tim
• Jermann Frank
• Strauss Jörg

Classifications

• H10W90/756

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

• H10W90/736

  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

• C09K11/0883 Primary

  Arsenides; Nitrides; Phosphides · CPC title

• H01J1/63 Primary

  characterised by the luminescent material · CPC title