Non-resonant energy transfer from the 5D4 level of Tb3+ to the 5D0 level of Eu3+
Non-resonant energy transfer from the 5D4 level of Tb3+ to the 5D0 level of Eu3+
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DOI：
10.1016/0925-8388(94)90182-1
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发表时间：
1994-06
影响因子：
6.2
通讯作者：
P. Tanner;Y. Liu;M. Chua;M. F. Reid
中科院分区：
文献类型：
--
作者：
P. Tanner;Y. Liu;M. Chua;M. F. Reid
Cs 2 NaTbCl 6 的红外吸收光谱和可见发射光谱用于为该立方钾冰晶石系统（高达 21 000 cm− 1）的能级提供分配。对光谱进行了详细解释，特别是关于电子跃迁的振动边带。与从 Cs 2 NaEuCl 6 的 5 D 0← 7 F 0 吸收光谱测量的振荡器强度一起，将数据用于光谱重叠模型中，以计算在 77 K 下从 Tb 3+ 的 5 D 4 项流形到 Eu 的 5 D 0 项的能量转移率。计算出的速率比之前报道的 [1] 能量转移率小 1.4× 10 6 倍，因此 5 D 似乎不太可能 4 Cs 2 NaTbCl 6: EuCl 6 3− 中的发光猝灭是由于所提出的交叉弛豫机制。
The infrared absorption spectrum and the visible emission spectra of Cs 2 NaTbCl 6 are used to provide assignments for the energy levels of this cubic elpasolite system, up to 21 000 cm− 1. The spectra have been interpreted in detail, particularly with respect to the vibrational sidebands of the electronic transitions. Together with the measured oscillator strengths from the 5 D 0← 7 F 0 absorption spectrum of Cs 2 NaEuCl 6, the data are used in a spectral overlap model to calculate the energy transfer rate from the 5 D 4 term manifold of Tb 3+ to the 5 D 0 term of Eu at 77 K. The calculated rate is 1.4× 10 6 times smaller than the previously reported [1] energy transfer rate, so that it appears unlikely that the 5 D 4 luminescence quenching in Cs 2 NaTbCl 6: EuCl 6 3− is due to the proposed cross-relaxation mechanism.