Color stable manganese-doped phosphors
Abstract
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.
- Inventors:
-
- Burnt Hills, NY
- Niskayuna, NY
- Twinsburg, OH
- Sofia, BG
- Issue Date:
- Research Org.:
- National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
- Sponsoring Org.:
- USDOE
- OSTI Identifier:
- 1058909
- Patent Number(s):
- 8252613
- Application Number:
- 13/069,756
- Assignee:
- General Electric Company (Niskayuna, NY)
- Patent Classifications (CPCs):
-
C - CHEMISTRY C09 - DYES C09K - MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
- DOE Contract Number:
- EE0003251
- Resource Type:
- Patent
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
Citation Formats
Lyons, Robert Joseph, Setlur, Anant Achyut, Deshpande, Anirudha Rajendra, and Grigorov, Ljudmil Slavchev. Color stable manganese-doped phosphors. United States: N. p., 2012.
Web.
Lyons, Robert Joseph, Setlur, Anant Achyut, Deshpande, Anirudha Rajendra, & Grigorov, Ljudmil Slavchev. Color stable manganese-doped phosphors. United States.
Lyons, Robert Joseph, Setlur, Anant Achyut, Deshpande, Anirudha Rajendra, and Grigorov, Ljudmil Slavchev. Tue .
"Color stable manganese-doped phosphors". United States. https://www.osti.gov/servlets/purl/1058909.
@article{osti_1058909,
title = {Color stable manganese-doped phosphors},
author = {Lyons, Robert Joseph and Setlur, Anant Achyut and Deshpande, Anirudha Rajendra and Grigorov, Ljudmil Slavchev},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Tue Aug 28 00:00:00 EDT 2012},
month = {Tue Aug 28 00:00:00 EDT 2012}
}
Works referenced in this record:
Mn[sup 4+]-Activated Red Photoluminescence in K[sub 2]SiF[sub 6] Phosphor
journal, January 2008
- Takahashi, Toru; Adachi, Sadao
- Journal of The Electrochemical Society, Vol. 155, Issue 12
Direct synthesis and properties of K2SiF6:Mn4+ phosphor by wet chemical etching of Si wafer
journal, July 2008
- Adachi, Sadao; Takahashi, Toru
- Journal of Applied Physics, Vol. 104, Issue 2
Photoluminescent properties of cubic K2MnF6 particles synthesized in metal immersed HF/KMnO4 solutions
journal, December 2010
- Kasa, Ryota; Arai, Yusuke; Takahashi, Toru
- Journal of Applied Physics, Vol. 108, Issue 11