Upconversion multicolor tuning of NaY(WO4)2:Tb3+ with Eu3+ doping
来源期刊:JOURNAL OF RARE EARTHS2018年第9期
论文作者:Zhongxiang Shi Jing Wang Xin Guan
文章页码:911 - 916
摘 要:A series of Tb3+ and Eu3+ co-doped NaY(WO4)2 phosphors were synthesized by hydrothermal reactions.The crystal structure,morphology,upconversion luminescent properties,the energy transfer from Tb3+ to Eu3+ions and the 5 D4→ 7 F5 transition of the Tb3+ ion in NaY(WO4)2:Tb3+,Eu3+ phosphors were investigated in details.The results indicate that all the synthesized samples are of pure tetragonal phase NaY(WO4)2.Furthermore,the micrometer-sized needle spheres and excellent dispersion of the particles are obtained by adding polyethylene glycol(PEG-2000) as the surfactant.Phosphors of NaY(WO4)2:Tb3+,Eu3+ exhibit the492 nm blue emission peak,546 nm green emission peak,595 nm orange emission peak and 616 nm red emission peak under 790 nm excitation.The energy transfer from Tb3+ to Eu3+ is a resonant transfer,in which electric dipole-dipole interaction plays a leading role.By adjusting the doping concentration of Eu3+ in NaY(WO4)2: 1.0 mol%Tb3+,xmol%Eu3+ phosphors,the emitting color of UC phosphors can be tuned from green to red.
Zhongxiang Shi,Jing Wang,Xin Guan
Liaoning Key Laboratory for Fabrication and Application of Superfine Inorganic Powders,Dalian Jiaotong University
摘 要:A series of Tb3+ and Eu3+ co-doped NaY(WO4)2 phosphors were synthesized by hydrothermal reactions.The crystal structure,morphology,upconversion luminescent properties,the energy transfer from Tb3+ to Eu3+ions and the 5 D4→ 7 F5 transition of the Tb3+ ion in NaY(WO4)2:Tb3+,Eu3+ phosphors were investigated in details.The results indicate that all the synthesized samples are of pure tetragonal phase NaY(WO4)2.Furthermore,the micrometer-sized needle spheres and excellent dispersion of the particles are obtained by adding polyethylene glycol(PEG-2000) as the surfactant.Phosphors of NaY(WO4)2:Tb3+,Eu3+ exhibit the492 nm blue emission peak,546 nm green emission peak,595 nm orange emission peak and 616 nm red emission peak under 790 nm excitation.The energy transfer from Tb3+ to Eu3+ is a resonant transfer,in which electric dipole-dipole interaction plays a leading role.By adjusting the doping concentration of Eu3+ in NaY(WO4)2: 1.0 mol%Tb3+,xmol%Eu3+ phosphors,the emitting color of UC phosphors can be tuned from green to red.
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