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Title: Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same

Abstract

Europium-activated phosphors comprise oxides of at least a rare-earth metal selected from the group consisting of gadolinium, yttrium, lanthanum, and combinations thereof and at least a Group-IIIB metal selected from the group consisting of aluminum, gallium, indium, and combinations thereof. A method for making such phosphors comprises adding at least a halide of at least one of the selected Group-IIIB metals in a starting mixture. The method further comprises firing the starting mixture in an oxygen-containing atmosphere. The phosphors produced by such a method exhibit improved absorption in the UV wavelength range and improved quantum efficiency.

Inventors:
; ;
Issue Date:
Research Org.:
GE Global Research, Niskayuna, New York (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1175686
Patent Number(s):
7022263
Application Number:
10/779,086
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 H01J - ELECTRIC DISCHARGE TUBES OR DISCHARGE LAMPS
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DOE Contract Number:  
FC26-99FT40632
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Comanzo, Holly Ann, Setlur, Anant Achyut, and Srivastava, Alok Mani. Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same. United States: N. p., 2006. Web.
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Comanzo, Holly Ann, Setlur, Anant Achyut, & Srivastava, Alok Mani. Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same. United States.
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Comanzo, Holly Ann, Setlur, Anant Achyut, and Srivastava, Alok Mani. Tue . "Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same". United States. https://www.osti.gov/servlets/purl/1175686.
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@article{osti_1175686,
title = {Europium-activated phosphors containing oxides of rare-earth and group-IIIB metals and method of making the same},
author = {Comanzo, Holly Ann and Setlur, Anant Achyut and Srivastava, Alok Mani},
abstractNote = {Europium-activated phosphors comprise oxides of at least a rare-earth metal selected from the group consisting of gadolinium, yttrium, lanthanum, and combinations thereof and at least a Group-IIIB metal selected from the group consisting of aluminum, gallium, indium, and combinations thereof. A method for making such phosphors comprises adding at least a halide of at least one of the selected Group-IIIB metals in a starting mixture. The method further comprises firing the starting mixture in an oxygen-containing atmosphere. The phosphors produced by such a method exhibit improved absorption in the UV wavelength range and improved quantum efficiency.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {4}
}
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Works referenced in this record:

Lamp Phosphors
book, January 1994

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