Preparation and characterization of Sr4Al2O7:Eu3+, Eu2+ phosphors

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A new composition of red strontium aluminate phosphor (Sr4Al2O7:Eu3+, Eu2+) is synthesized using a solid state reaction method in air and in a reducing atmosphere. The investigation of firing temperature indicates that a single phase of Sr4Al2O7 is formed when the firing temperature is higher than 1300 degrees C and that a Sr3Al2O6 phase is formed as the main peak below 1300 degrees C. The effects of firing temperature and doping concentration on luminescent properties are investigated. Sr4Al2O7 phosphors exhibit the typical red luminescent properties of Eu3+ and Eu2+. A comparison photoluminescence study with Sr3Al2O6 phosphor shows that Sr4Al2O7 has higher emission intensity than Sr3Al2O6 as a result of the higher optimum doping concentration of Sr4Al2O7 phosphor. (C) 2011 Elsevier B.V. All rights reserved.
Publisher
ELSEVIER SCIENCE BV
Issue Date
2011-11
Language
English
Article Type
Article
Keywords

STRONTIUM ALUMINATE; LUMINESCENCE; SRO-AL2O3; BARIUM; PHASE

Citation

MATERIALS SCIENCE AND ENGINEERING B-ADVANCED FUNCTIONAL SOLID-STATE MATERIALS, v.176, no.18, pp.1521 - 1525

ISSN
0921-5107
URI
http://hdl.handle.net/10203/101501
Appears in Collection
MS-Journal Papers(저널논문)
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