Blue-green and green phosphors for lighting applications
Embodiments of the present techniques provide a related family of phosphors that may be used in lighting systems to generate blue or blue-green light. The phosphors include systems having a general formula of: ((Sr.sub.1-zM.sub.z).sub.1-(x+w)A.sub.wCe.sub.x).sub.3(Al.sub.1-ySi.s- ub.y)O.sub.4+y+3(x-w)F.sub.1-y-3(x-w) (I), wherein 0<x.ltoreq.0.10, 0.ltoreq.y.ltoreq.0.5, 0.ltoreq.z.ltoreq.0.5, 0.ltoreq.w.ltoreq.x, A is Li, Na, K, Rb, or Ag or any combinations thereof, and M is Ca, Ba, Mg, Zn, or Sn or any combinations thereof. Advantageously, phosphors made accordingly to these formulations maintain emission intensity across a wide range of temperatures. The phosphors may be used in lighting systems, such as LEDs and fluorescent tubes, among others, to produce blue and blue/green light. Further, the phosphors may be used in blends with other phosphors, or in combined lighting systems, to produce white light suitable for illumination.
- Research Organization:
- NETL (National Energy Technology Laboratory, Pittsburgh, PA, and Morgantown, WV (United States))
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FC26-06NT42934
- Assignee:
- General Electric Company (Niskayuna, NY)
- Patent Number(s):
- 8,329,060
- Application Number:
- 12/256,142
- OSTI ID:
- 1082455
- Country of Publication:
- United States
- Language:
- English
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journal | April 1999 |
Substitution of oxygen by fluorine in the GdSr_2AlO_5:Ce^3+ phosphors: Gd_1−xSr_2+xAlO_5−xF_x solid solutions for solid state white lighting
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journal | January 2009 |
Cation and anion ordering in the layered oxyfluorides Sr3−xAxAlO4F (A=Ba, Ca)
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journal | April 2003 |
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