Chin. Phys. Lett.  2000, Vol. 17 Issue (7): 532-533    DOI:
Original Articles |
Cascade Energy Transfer in CeF3 Crystals
SHI Chao-Shu1;DENG Jie1;WE1 Ya-Guang1;ZHANG Guo-Bin1;G. Zimmerer2;J. Becker2;SHEN Ding-Zhong3;HU Guan-qin3
1Structure Research Laboratory, University of Science and Technology of China, Hefei 230026 2II Institut für Experimentalphysik der Universitat Hamburg, Hamburg 22761, Germany 3Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050
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SHI Chao-Shu, DENG Jie, WE Ya-Guang et al  2000 Chin. Phys. Lett. 17 532-533
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Abstract The emission spectra of the CeF3 crystals in UV-visible region and their temperature dependence in the range of 6-453K under UV, VUV excitation as well as their excitation spectra (4-25eV) have been studied. The 350nm emission band from perturbed Ce3+ can be excited by 295.2 and 302.4nm emissions from the regular Ce3+. The 350nm emission band, in turn, can excite the emission bands centered at 470 and 535nm caused by some defects below room temperature. These results show that there is a cascade energy transfer process from regular Ce3+ to quenching centers via perturbed Ce3+ and defect centers in the CeF3. Meanwhile, thermoluminescence, giving peaks at about 240 and 300°C has been discovered, and the corresponding deep traps with depth~ leV are found to be a kind of quenching center for CeF3 luminescence at room temperature.

Keywords: 78.55.-m      78.20.-e      78.20.Nv     
Published: 01 July 2000
PACS:  78.55.-m (Photoluminescence, properties and materials)  
  78.20.-e (Optical properties of bulk materials and thin films)  
  78.20.Nv  
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https://cpl.iphy.ac.cn/       OR      https://cpl.iphy.ac.cn/Y2000/V17/I7/0532
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SHI Chao-Shu
DENG Jie
WE Ya-Guang
ZHANG Guo-Bin
G. Zimmerer
J. Becker
SHEN Ding-Zhong
HU Guan-qin
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