| 光谱学与光谱分析 |
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| Luminescence Spectra of Sm3+ Doped Sr2CeO4 Synthesized through Co-Precipitation Process |
| SHI Shi-kao1, 2, LI Jun-min1,ZHOU Ji2* |
1. College of Chemistry, Hebei Normal University, Shijiazhuang 050091, China
2. State Key Lab of New Ceramics and Fine Processing, Department of Materials Science and Engineering, Tsinghua University, Beijing 100084, China |
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Abstract The precursor powders of Sm3+ doped Sr2CeO4 were obtained by the application of (NH4)2C2O4 as a precipitant. After calcinations, the precursor powders became a white emitting fluorescent material. The XRD and emission spectra manifest that the optimum temperature and Sm3+ concentration for synthesizing Sr2CeO4:Sm are 1 050 ℃ and 1 mol%, respectively. The better the phosphor powders crystallize, the higher their emission intensities are. The excitation spectrum implies that the transition emissions of Sm3+ at 608 and 654 nm originate from the Ce4+-O2- charge transfer (MLCT) resulting from the interaction of Ce4+ and the neighboring O2-. Therefore, it can be concluded that the host Sr2CeO4 acts as a sensitizer, which transfers the energy to Sm3+. The emission intensity of the phosphor synthesized through co-precipitation is much higher than that of phosphor prepared using conventional solid state reactions.
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Received: 2004-05-20
Accepted: 2004-07-28
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Corresponding Authors:
ZHOU Ji
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| Cite this article: |
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SHI Shi-kao,LI Jun-min,ZHOU Ji. Luminescence Spectra of Sm3+ Doped Sr2CeO4 Synthesized through Co-Precipitation Process [J]. SPECTROSCOPY AND SPECTRAL ANALYSIS, 2005, 25(10): 1739-1741.
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https://www.gpxygpfx.com/EN/Y2005/V25/I10/1739 |
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