期刊
JOURNAL OF LUMINESCENCE
卷 100, 期 1-4, 页码 107-113出版社
ELSEVIER
DOI: 10.1016/S0022-2313(02)00454-4
关键词
spectroscopy; praseodymium; aluminates; quantum splitting
类别
The vacuum ultraviolet spectroscopy of Pr3+ doped CaAl4O7, LaMgAl11O19 and SrLaAlO4 is reported. It appears that whenever the aluminate host lattice is excited directly, mainly exciton and 4f(2)-4f(2) [(3)p(0)] Pr3+ emission are observed. When the excitation energy is lower, Pr3+ ions are excited selectively and 4f5d-4f(2) emission dominates. These observations can be explained by assuming that energy transfer from the host lattice to the Pr3+ ion. takes place preferentially via an intermediate exciton state with an energy too low to reach the energetic Pr3+ 4f5d excited states. (C) 2002 Elsevier Science B.V. All rights reserved.
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