Red emitting luminescent materials

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Quick Facts

Patent No.: US 9,257,607
App. No.: 13/988,852
Granted: Feb 9, 2016
Kind: B2

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Abstract

The invention relates to a novel red emitting material of (Ba 1 — x — y — z Sr x Ca y Eu z ) 2 Si 5 — a−b Al a N 8−a−4b O a+4b having an average particle size distribution d 50 of >6 μm, with 0.3≦x≦0.9, 0.01≦y≦0.1, 0.005≦z≦0.04, 0≦a≦0.2 and 0≦b≦0.2.

Claims (10)

1. A light emitting diode structure comprising a material according to the formula:

(Ba 1−x−y−z Sr x Ca y EU z ) 2 Si 5−a−b Al a N 8−a−4b O a+4b , wherein

0.3≦x≦0.9,

0.01≦y≦0.1,

0.005≦z≦0.04,

0≦a≦0.2 and

0<b≦0.2.

2. The light emitting diode structure according to claim 1 , having an average particle size distribution of ≧6 μm.

3. The light emitting diode structure according to claim 1 , wherein 0.02≦y≦0.04.

4. The light emitting diode structure according to claim 1 , wherein 0.35≦x≦0.8.

Assignments (6)