Temperature-independent delayed fluorescence of benzo[f]quinoline in biphenyl host: A new interpretation of delayed fluorescence behavior around 77K.
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概要
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The delayed fluorescence observed in the mixed crystals of benzo[<I>f</I>]quinoline in biphenyl host has been found to be independent of temperature in the low temperature region from 90 K down to liquid helium temperature, and subtraction of this temperature-independent contribution from the observed total delayed fluorescence intensity above 90 K has given straight-line fits of the log<I>I</I><SUB>DF</SUB>⁄<I>I</I><SUB>P</SUB><SUP>2</SUP> <I>vs.</I> 1/<I>T</I> plots, that is, a single activation energy has been obtained over the whole temperature range studied, instead of two different ones as usually assumed. Such a correction has also been given to a new attempt of log<I>I</I><SUB>DF</SUB> <I>vs.</I> 1/<I>T</I> plots successfully. Moreover, the decay behavior of the delayed luminescence has been studied over the wide temperature and concentration range. It has been concluded that the decay behavior of the temperature-independent delayed fluorescence may mainly be responsible for the nonexponential decay of the delayed fluorescence around 77 K.
- 公益社団法人 日本化学会の論文
著者
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Kusumoto Yoshihumi
Department Of Chemistry And Bioscience Graduate School Of Science And Engineering Kagoshima Universi
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Kanda Yoshiya
Department of Chemistry, Faculty of Science, Kyushu University
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Gondo Yasuhiko
Department of Chemistry, Faculty of Science, Kyushu University
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Kusumoto Yoshihumi
Department of Chemistry, Faculty of Science, Kyushu University
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