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Your search keyword '"Guo, Qingfeng"' showing total 14 results
Start Over Author "Guo, Qingfeng" Journal journal of luminescence
14 results on '"Guo, Qingfeng"'

14. Luminescence properties and energy transfer in La6Ba4(SiO4)6F2:Ce3+,Tb3+ phosphors.

Author

Guo, Qingfeng, Liao, Libing, and Xia, Zhiguo

Subjects
*ENERGY transfer, *LUMINESCENCE, *LANTHANUM compounds, *LIGHT emitting diodes, *PHOSPHORS, *EXCITATION spectrum
Abstract

Abstract: A series of new luminescent emission-tunable phosphors La6Ba4(SiO4)6F2:Ce3+,Tb3+ with apatite structure have been synthesized by a high temperature solid-state reaction. X-ray diffraction, photoluminescence (PL) emission and excitation spectra, lifetime, as well as the effect of Tb3+ concentration were employed to characterize the resulting samples. The PL spectrum of La6Ba4(SiO4)6F2:Ce3+,Tb3+ phosphor contains both the asymmetric broad-band blue emission (Ce3+ ion) and the line-type green emission (Tb3+ ion). The increased Tb3+ concentration induced the emitting colors to shift from blue to green region by the naked eye. Meanwhile, the energy transfer between Ce3+ and Tb3+ is thoroughly investigated, and the energy-transfer efficiency from Ce3+ to Tb3+ ion is also calculated. The results indicated that these phosphors could be considered as double emission phosphors for n-UV excited white light-emitting diodes. [Copyright &y& Elsevier]

Published
2014
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