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Title: Color stable manganese-doped phosphors

Patent ·
OSTI ID:1130051
; ; ;

A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor material radiationally coupled to the light source. The phosphor material includes a color-stable Mn.sup.+4 doped phosphor prepared by a process including providing a phosphor of formula I; A.sub.x[MF.sub.y]:Mn.sup.+4 I and contacting the phosphor in particulate form with a saturated solution of a composition of formula II in aqueous hydrofluoric acid; A.sub.x[MF.sub.y]; II wherein A is Li, Na, K, Rb, Cs, NR.sub.4 or a combination thereof; M is Si, Ge, Sn, Ti, Zr, Al, Ga, In, Sc, Y, La, Nb, Ta, Bi, Gd, or a combination thereof; R is H, lower alkyl, or a combination thereof; x is the absolute value of the charge of the [MF.sub.y] ion; and y is 5, 6 or 7. In particular embodiments, M is Si, Ge, Sn, Ti, Zr, or a combination thereof.

Research Organization:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Organization:
USDOE
DOE Contract Number:
EE0003251
Assignee:
General Electric Company (Niskayuna, NY)
Patent Number(s):
8,710,487
Application Number:
13/561,192
OSTI ID:
1130051
Resource Relation:
Patent File Date: 2012 Jul 30
Country of Publication:
United States
Language:
English

References (10)

Red emitting phosphor materials for use in LED and LCD applications patent April 2008
Red line emitting phosphor materials for use in LED applications patent March 2009
Red line emitting phosphors for use in led applications patent January 2010
Red line emitting complex fluoride phosphors activated with Mn4+ patent December 2010
Red Line Emitting Complex Fluoride Phosphors Activated with Mn4+ patent-application January 2009
Semiconductor Light-Emitting Device as Well as Image Display and Liquid Crystal Display Employing the Same patent-application April 2010
Semiconductor Light Emitting Device, Backlight, Color Image Display Device and Phosphor to be Used for Them patent-application June 2010
Photoluminescent properties of cubic K2MnF6 particles synthesized in metal immersed HF/KMnO4 solutions journal December 2010
Direct synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer journal July 2008
Mn[sup 4+]-Activated Red Photoluminescence in K[sub 2]SiF[sub 6] Phosphor journal January 2008

Cited By (12)

Color stable red-emitting phosphors patent July 2017
Color stable red-emitting phosphors patent February 2017
Red-emitting phosphors and associated devices patent February 2017
Process for preparing red-emitting phosphors patent January 2017
Red-emitting phosphors, associated processes and devices patent December 2016
Process for preparing red-emitting phosphors patent December 2016
Processes for preparing color stable manganese-doped phosphors patent July 2016
Processes for preparing color stable manganese-doped complex fluoride phosphors patent July 2016
Color stable red-emitting phosphors patent July 2016
Color stable red-emitting phosphors patent June 2016
Color stable red-emitting phosphors patent June 2016
Color stable red-emitting phosphors patent December 2014

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