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《Journal of Functional Materials and Devices》 2010-05
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Luminescence and energy transfer of Eu~(2+),Mn~(2+) in CaZn_2(PO_4)_2

YANG Zhi-ping1,SONG Zhao-feng1,MA Xin1,WANG Feng-he1,LI Li-hu1,WEN Jian-wei2(1.Physics Science and Technology College,Hebei University,Baoding 071002,China;2.College of Electronic and Informational Engineering,Hebei University,Baoding 071002,China)  
When Mn2+ doped to some interstitial substances,luminescence was very weak.So the appropriate sensitized substance was choosed to increase luminescence efficiency,The researchful purpose validate that Eu2+ is favorable sensitized substance of Mn2+.CaZn2(PO4)2:Eu2+,Mn2+ phosphor was synthesized by high temperature solid-state reaction,and its luminescence properties were investigated.When the sample doped single Eu2+,its emission peak locating at 504nm,which correspond to 5d-4f transition of Eu2+.The excitation peak locating at 380nm,which correspond to f-d broadband absorption of Eu2+.The sample which doped single Mn2+ was not luminescent,when it doped together Eu2+,Mn2+ : 673 nm emission peak of Mn2+ appeared,the phosphor show excellent red emission.It is suggested that Mn2+ ion is sensitized strongly by Eu2+ ion,The effect of the molar concentration of Eu2+ and Mn2+ on excitation and emission spectra were also studied.It demonstrated that the energy transfer between Eu2+ and Mn2+ is due to resonance energy transfer in CaZn2(PO4)2:Eu2+,Mn2+.
【Fund】: 河北科学技术发展基金(51215103b)资助项目
【CateGory Index】: O482.31
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