期刊
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS
卷 73, 期 7, 页码 886-889出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jpcs.2012.02.014
关键词
Optical materials; Luminescence; Optical properties
资金
- Qianjiang Talents Project of Zhejiang Province [2010R10024]
- Zhejiang Provincial Natural Science Foundation [Z4100030, Y4110416]
- National Natural Science Foundation of China [51072190]
- Program for New Century Excellent Talents in University of China [NCET-07-0786]
Eu3+-doped Sr2Si1-xGexO4 (x=0-1) phosphors have been prepared by the high temperature solid-state reaction method. The luminescent properties of these phosphors were investigated. Red fluorescence of Eu3+ is enhanced gradually in the samples with increasing substitution of Si by Ge upon the excitation of 393 nm light. The intensity is increased by 50% with full substitution of Si by Ge. These results are originated from the structural changes and the phonon energy reduction in the samples due to the substitution of Si by Ge. The CIE chromaticity coordinates of the phosphors vary slightly around (0.62, 0.37) and all are in the red color region. The results indicate that these phosphors could be promising red phosphors for white light emitting diodes. (C) 2012 Elsevier Ltd. All rights reserved.
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