Luminescence Saturation Effects in Y_2O_2S : Eu Phosphor
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概要
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The saturation effects of Eu^<3+> luminescence in Y_2O_2S have been investigated using a pulsed nitrogen laser at room temperature and at 80 K, and also under pulsed cathode-ray excitation at room temperature. Interaction between excited-state Eu^<3+> ions gives rise to a predominant energy-loss mechanism causing saturation. One of the two Eu^<3+> ions in the charge transfer state (CTS) is forced to relax nonradiatively to the ^7F state by dipole-dipole interaction, and the other is promoted to a higher bound exciton state, or eventually dissociated to a free hole and a bound electron. Interaction between a Eu^<3+> ion in the ^5D state and a CTS-Eu^<3+> ion also causes nonradiative relaxation of the ^5D state, which causes differences in the saturation behavior of different emitting states and brings about excitation intensity dependence in the luminescence decay curves.
- 社団法人応用物理学会の論文
- 1980-01-05
著者
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YOKONO Shigeru
Sony Corporation Research Center
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HOSHINA Teruhiko
Sony Corporation Research Center
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Imanaga Syunji
Sony Corporation Research Center
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Imanaga Syunji
Sony Corporation Frontier Science Laboratories
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