Journal
MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY
Volume 146, Issue 1-3, Pages 99-102Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.mseb.2007.07.052
Keywords
europium oxide; optical properties; strontium silicate; energy transfer
Funding
- National Research Foundation of Korea [R01-2005-000-10530-0] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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Sr2SiO4:Eu2+ phosphors were prepared by a flux method. Two emission bands at 495 nm and 560 nm were observed, which originated from Eu(I) and Eu(II) that were substituted for Sr(I) and Sr(II), respectively. The preference of Eu2+, ions for Sr(I) and Sr(II) strongly depended on the amounts of flux and firing temperatures. The increase of Eu2+ concentration led to the energy transfer from Eu(I) to Eu(II) emitting center, resulting in the red-shift, and the phase transformation from beta- to alpha'-Sr2SiO4 were observed. (C) 2007 Elsevier B.V. All rights reserved.
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