Color stable manganese-doped phosphors
- Burnt Hills, NY
- Niskayuna, NY
- Twinsburg, OH
- Sofia, BG
A process for preparing color stable Mn.sup.+4 doped phosphors includes 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. A lighting apparatus capable of emitting white light includes a semiconductor light source; and a phosphor composition radiationally coupled to the light source, and which includes a color stable Mn.sup.+4 doped phosphor.
- Research Organization:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- EE0003251
- Assignee:
- General Electric Company (Niskayuna, NY)
- Patent Number(s):
- 8,252,613
- Application Number:
- 13/069,756
- OSTI ID:
- 1058909
- Country of Publication:
- United States
- Language:
- English
Mn[sup 4+]-Activated Red Photoluminescence in K[sub 2]SiF[sub 6] Phosphor
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journal | January 2008 |
Direct synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer
|
journal | July 2008 |
Photoluminescent properties of cubic K2MnF6 particles synthesized in metal immersed HF/KMnO4 solutions
|
journal | December 2010 |
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