Luminescence properties of Gd2Si2O7:Ce and Gd2Si2O7:La,Ce under vacuum ultraviolet irradiation
来源期刊：JOURNAL OF RARE EARTHS2016年第8期
论文作者：M.Koshimizu T.Yanagida Y.Fujimoto K.Asai
文章页码：782 - 785
摘 要：The luminescence properties of Ce- or Ce and La-doped gadolinium pyrosilicate（Gd2Si2O7, GPS） were characterized using vacuum ultraviolet（VUV） excitation light. A prominent emission band was observed in the luminescence spectra with excitation at 60 nm and ascribed to 5d-4f transition of Ce3+. Because the excitation wavelength of 60 nm corresponded to the excitation in the host matrix, this result indicated that the excitation energy transfer occurred from the host matrix to Ce3+ ions. On the basis of the rise in the luminescence time profiles with excitation at 60 nm, the energy transfer occurred within 2 ns, which was much shorter than that of Ce-doped Gd2SiO5. For Ce-doped GPS, the decay rate was slower for the host excitation than that for direct excitation of Ce3+. In contrast, for Ce and La-doped GPS, no significant difference was observed for the host excitation and direct excitation of Ce3+. This result indicated that the energy transfer from the host to Ce3+ ions led to a different radiative decay process, and that La doping had an effect on the energy transfer and decay process.
M.Koshimizu1，T.Yanagida2，Y.Fujimoto1，K.Asai1
1. Department of Applied Chemistry,Graduate School of Engineering,Tohoku University2. Graduate School of Materials Science,Nara Institute of Science and Technology
摘 要：The luminescence properties of Ce- or Ce and La-doped gadolinium pyrosilicate（Gd2Si2O7, GPS） were characterized using vacuum ultraviolet（VUV） excitation light. A prominent emission band was observed in the luminescence spectra with excitation at 60 nm and ascribed to 5d-4f transition of Ce3+. Because the excitation wavelength of 60 nm corresponded to the excitation in the host matrix, this result indicated that the excitation energy transfer occurred from the host matrix to Ce3+ ions. On the basis of the rise in the luminescence time profiles with excitation at 60 nm, the energy transfer occurred within 2 ns, which was much shorter than that of Ce-doped Gd2SiO5. For Ce-doped GPS, the decay rate was slower for the host excitation than that for direct excitation of Ce3+. In contrast, for Ce and La-doped GPS, no significant difference was observed for the host excitation and direct excitation of Ce3+. This result indicated that the energy transfer from the host to Ce3+ ions led to a different radiative decay process, and that La doping had an effect on the energy transfer and decay process.
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