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Title: Fluorescent lighting with aluminum nitride phosphors

A fluorescent lamp includes a glass envelope; at least two electrodes connected to the glass envelope; mercury vapor and an inert gas within the glass envelope; and a phosphor within the glass envelope, wherein the phosphor blend includes aluminum nitride. The phosphor may be a wurtzite (hexagonal) crystalline structure Al.sub.(1-x)M.sub.xN phosphor, where M may be drawn from beryllium, magnesium, calcium, strontium, barium, zinc, scandium, yttrium, lanthanum, cerium, praseodymium, europium, gadolinium, terbium, ytterbium, bismuth, manganese, silicon, germanium, tin, boron, or gallium is synthesized to include dopants to control its luminescence under ultraviolet excitation. The disclosed Al.sub.(1-x)M.sub.xN:Mn phosphor provides bright orange-red emission, comparable in efficiency and spectrum to that of the standard orange-red phosphor used in fluorescent lighting, Y.sub.2O.sub.3:Eu. Furthermore, it offers excellent lumen maintenance in a fluorescent lamp, and does not utilize "critical rare earths," minimizing sensitivity to fluctuating market prices for the rare earth elements.
Inventors:
; ; ;
Issue Date:
OSTI Identifier:
1252202
Assignee:
Lawrence Livermore National Security, LLC (Livermore, CA) General Electric Company (Schenectady, NY) LLNL
Patent Number(s):
9,337,010
Application Number:
14/840,839
Contract Number:
AC52-07NA27344
Resource Relation:
Patent File Date: 2015 Aug 31
Research Org:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org:
USDOE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE

Works referenced in this record:

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Surface characterization of chemically treated aluminium nitride powders
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Low-temperature synthesis of AlN powder with multicomponent additive systems by carbothermal reduction–nitridation method
journal, June 2010

Characterization of AlN:Mn thin film phosphors prepared by metalorganic chemical vapor deposition
journal, January 2007