Self-Trapped Exciton Luminescence in Kbr_<1-x>I_x and RbBr_<1-x>I_x Solid Solutions
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概要
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Emission spectra and decay characteristics of luminescence in KBr. ,l. andRbBr. -,I, solid solutions have been investigated in the whole range of composition x.The emission band due to localized excitons at I- dimer centers in bromides, whichconsists of singlet and triplet components, is found to connect continuously with in-trinsic o band in pure iodides. The triplet component of the band is transformed intoanother emission with larger Stokes-shift in the intermediate region of x. Time-re-solved studies on this emission in KBr. .1. have clarified that it consists of two tripletemission bands differing by - 0.2 eV in their peak energies. The lower energy one cor-responds to n band in Kl. We demonstrate that the relaxed exciton configurations ofdifferent types are selectively realized depending on the local environment surrounding the l] molecular core of the exciton. Discussion is given on the dynamical relaxaLion process of free excitons in iodides.[self-trapped exciton, alkali halide, mixed crystal, luminescence, lattice relaxa- ll tionl
- 社団法人日本物理学会の論文
- 1992-03-15
著者
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Matsumoto T
Kyoto Univ. Kyoto
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Kanno K
Department Of Material Science And Chemistry Wakayamna University
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Toyoda Koichi
Department Of Physics Osaka Dental University
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Hayashi Tetsusuke
Colledge Of General Education Kyoto University
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YANASE Toshihiro
Department of Physics,Faculty of Science,Kyoto University
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MATUMOTO Tamao
Department of Physics,Faculty of Science,Kyoto University
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NAKAI Yoshino
Department of Physics,Faculty of Science,Kyoto University
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Matumoto Tamao
Department Of Physics Faculty Of Science Kyoto University
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Toyoda Koichi
Department Of Applied Electronics Faculty Of Industrial Science & Technology Science University
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Nakai Yoshino
Department Of Physics Faculty Of Science Kyoto University
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Yanase Toshihiro
Department Of Physics Faculty Of Science Kyoto University:plastics Dpt. Sumitomo Metal Industries Lt
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