Up-conversion luminescence of Tm3+/Yb3+ co-doped oxy-fluoride glasses
来源期刊：JOURNAL OF RARE EARTHS2010年第2期
论文作者：徐利 宋博 肖生春 吕景文
文章页码：194 - 197
摘 要：The oxy-fluorosilicate glasses co-doped with Yb3+/Tm3+ were prepared.The absorption spectra were recorded.The Tm3+ ion showed two absorption bands,with one at 774 nm due to 1G4→3H6 transition and the other at 667 nm due to 1G4→3F4 transition.The energy transfer between Tm3+ ion and Yb3+ ion and the up-conversion fluorescence of Tm3+ ion were investigated using 980 nm LD excitation.The results showed that the blue and red emissions were three-photon absorption processes corresponding with 1G4→3H6 and 1G4→3F4 transition,respectively.Compared with the fluorescence intensities of the different Tm3+ doping concentration samples,0.2 mol.% is the optimal con-centration for the oxy-fluorosilicate glass.When the concentration was more than 0.2 mol.%,the cross relaxation of Tm3+ ions（3H5+3H5→3H6+3F2） enhanced resulting in the decrease of up-conversion luminescence intensities and leading to the concentration quenching.
徐利，宋博，肖生春，吕景文
Department of Materials Science and Engineering,Changchun University of Science and Technology
摘 要：The oxy-fluorosilicate glasses co-doped with Yb3+/Tm3+ were prepared.The absorption spectra were recorded.The Tm3+ ion showed two absorption bands,with one at 774 nm due to 1G4→3H6 transition and the other at 667 nm due to 1G4→3F4 transition.The energy transfer between Tm3+ ion and Yb3+ ion and the up-conversion fluorescence of Tm3+ ion were investigated using 980 nm LD excitation.The results showed that the blue and red emissions were three-photon absorption processes corresponding with 1G4→3H6 and 1G4→3F4 transition,respectively.Compared with the fluorescence intensities of the different Tm3+ doping concentration samples,0.2 mol.% is the optimal con-centration for the oxy-fluorosilicate glass.When the concentration was more than 0.2 mol.%,the cross relaxation of Tm3+ ions（3H5+3H5→3H6+3F2） enhanced resulting in the decrease of up-conversion luminescence intensities and leading to the concentration quenching.
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