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《Acta Physico-Chimica Sinica》 2012-03
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Optical Properties and Energy Transfer of Sr_(1-x-y)MgP_2O_7 :xCe~(3+),yTb~(3+) Phosphor under Ultraviolet Excitation

DOU Xi-Hua 1 ZHAO Wei-Ren 1,SONG En-Hai 1 MIN Hua-Chu 2 ( 1 School of Physics&Optoelectronic Engineering,Guangdong University of Technology,Guangzhou 510006,P.R.China; 2 Dongguan Xinguangyuan Electronics Co.Ltd.,Dongguan 523500,Guangdong Province,P.R.China)  
Sr 1-x-y MgP 2 O 7 :xCe 3+ ,yTb 3+ phosphors were successfully synthesized by a solid-state reaction method.The crystal structure,optical properties,luminescence decay,energy transfer,and thermal stability properties were investigated.The results showed that the emission peaks of the co-doped Ce 3+ and Tb 3+ ions in the SrMgP 2 O 7 host were located at 398 and 545 nm,respectively.The peaks were attributed to 5d-4f and 5 D 4 → 7 F 5 transitions,respectively.An efficient energy transfer from the Ce 3+ to Tb 3+ ions by means of dipole-dipole interactions was observed and the critical distance of the energy transfer was 0.614 nm. The thermal activation energies of 0.122 and 0.111 eV for SrMgP 2 O 7 :Ce 3+ and SrMgP 2 O 7 :Tb 3+ ,respectively, were obtained from the temperature dependent(313-453 K)luminescence intensities.The Tb 3+ ion was found to be superior to Ce 3+ ion in the thermal stability of light-emitting diodes.
【Fund】: 广东省教育部产学研结合项目(2010B090400021)资助~~
【CateGory Index】: O482.31
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