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Title: Blue-green and green phosphors for lighting applications

Abstract

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.

Inventors:
; ; ; ;
Issue Date:
Research Org.:
National Energy Technology Laboratory (NETL), Pittsburgh, PA, Morgantown, WV (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1082455
Patent Number(s):
8329060
Application Number:
12/256,142
Assignee:
General Electric Company (Niskayuna, NY)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01L - SEMICONDUCTOR DEVICES
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02B - CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
DOE Contract Number:  
FC26-06NT42934
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Setlur, Anant Achyut, Chandran, Ramachandran Gopi, Henderson, Claire Susan, Nammalwar, Pransanth Kumar, and Radkov, Emil. Blue-green and green phosphors for lighting applications. United States: N. p., 2012. Web.
Setlur, Anant Achyut, Chandran, Ramachandran Gopi, Henderson, Claire Susan, Nammalwar, Pransanth Kumar, & Radkov, Emil. Blue-green and green phosphors for lighting applications. United States.
Setlur, Anant Achyut, Chandran, Ramachandran Gopi, Henderson, Claire Susan, Nammalwar, Pransanth Kumar, and Radkov, Emil. Tue . "Blue-green and green phosphors for lighting applications". United States. https://www.osti.gov/servlets/purl/1082455.
@article{osti_1082455,
title = {Blue-green and green phosphors for lighting applications},
author = {Setlur, Anant Achyut and Chandran, Ramachandran Gopi and Henderson, Claire Susan and Nammalwar, Pransanth Kumar and Radkov, Emil},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2012},
month = {12}
}

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Works referenced in this record:

Cation and anion ordering in the layered oxyfluorides Sr3−xAxAlO4F (A=Ba, Ca)
journal, April 2003


Sr3MO4F (M=Al, Ga)—A New Family of Ordered Oxyfluorides
journal, April 1999