IP Library Granted Patent US 8,815,121
Granted Patent B2
US 8,815,121 · App. 13/601,489 · Granted Aug 26, 2014

Halogenated oxycarbidonitride phosphor and devices using same

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Quick Facts
Patent No.
US 8,815,121
App. No.
13/601,489
Granted
Aug 26, 2014
Kind
B2
Abstract

A red phosphor is provided. Also provided is a lighting apparatus containing a red phosphor.

Claims (18)

1. A red phosphor, comprising:

an inorganic compound represented by formula (1)

M(I) e M(II) f M(III) g Si j N u C x O w H v :zA   (1)

wherein M(I) is at least one monovalent cation; M(II) is at least one divalent cation; wherein M(III) is at least one trivalent cation; wherein H is a monovalent halogen anion; wherein A is at least one luminescence activator; wherein 0<e≦0.5; wherein 0.5≦f≦1; wherein 0.5≦g ≦1; wherein 1≦j≦1.5; wherein 0<u<3; wherein 0<x≦2; wherein 0<w≦0.75; wherein 0<v<1; wherein 0<(x+w)<3; wherein x≠w; and, wherein 0<z≦0.5.

2. The red phosphor of claim 1 , wherein the inorganic compound is represented by formula (2)

Li e (Ca a Sr b ) f Al g Si j N u C x O w H v :zA   (2)

wherein A is at least one luminescence activator; wherein 0<e≦0.5; wherein 0≦a≦1; wherein 0≦b≦1; wherein (a+b)≦1; wherein 0.5≦f≦1; wherein 0.5≦g≦1; wherein 1≦j≦1.5; wherein 0<u<3; wherein 0<x≦2; wherein 0<w≦0.75; wherein 0<(x+w)<3; wherein x≠w; wherein 0<v≦1; and, wherein 0<z≦0.5.

3. The red phosphor of claim 2 , wherein A is Eu 2+ .

4. The red phosphor of claim 3 , wherein (1−e)<f <1; wherein (1−e)≦g≦1; wherein 1≦j≦(1+e); wherein u={3−(4x/3)−h}; and, wherein 0.9* {(3z/2)−(v/2)}≦w≦. 1.1 * {(3z/2)−(v/2)}.

5. The red phosphor of claim 3 , wherein {1−(2e)}≦f≦1; wherein g=1; wherein j=1; wherein u={3−(4x/3)−z}; and, wherein {0.9*(3z/2)−(v/2)}≦w≦{1.1*(3z/2)−(v/2)}.

6. The red phosphor of claim 1 , wherein the red phosphor exhibits an emission spectra having a peak wavelength, Pλ phosphor , between 600 nm and 660 nm upon excitation from a light source exhibiting an emission spectra having a peak wavelength, Pλ source , between 200 nm and 600 nm.

7. The red phosphor of claim 1 , further comprising a surface treatment; wherein the surface treatment is applied to a surface of the inorganic compound.

8. A phosphor composition, comprising: a red phosphor according to claim 1 ; and, a liquid carrier; wherein the red phosphor is dispersed in the liquid carrier.

9. A lighting apparatus for emitting white light comprising:

a light source, wherein the light source produces light having a source luminescence spectrum; and,

a first source luminescence spectrum modifier, wherein the first source luminescence spectrum modifier is a red phosphor according to claim 1 ;

wherein the red phosphor is radiationally coupled to the light source.

10. The lighting apparatus of claim 9 , wherein the source luminescence spectrum has a peak wavelength, Pλ source , between 200 and 600 nm; and, wherein, upon excitation of the red phosphor by exposure to the light produced by the light source, the red phosphor exhibits an emission spectrum having a peak wavelength, Pλ phosphor , between 600 and 660 nm.

Assignments (2)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 22, 2014
From: LI, YUAN QIANG; ROMANELLI, MICHAEL D; TIAN, YONGCHI
To: LIGHTSCAPE MATERIALS, INC.
Reel/Frame 033361/0847 →
MODIFICATION OF SUBSTANTIAL U.S. MANUFACTURE REQUIREMENT Recorded Mar 21, 2014
From: UNITED STATES DEPARTMENT OF ENERGY
To: LIGHTSCAPE MATERIALS, INC. (WHOLLY OWNED BY THE DOW CHEMICAL COMPANY)
Reel/Frame 032493/0814 →