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中文摘要：
A series of Y3Al5O12:Ce(YAG:Ce) phosphors doped with different Si 4+ concentrations is prepared by solid-state reaction.The temperature dependent characteristics of luminescent spectrum and decay time of Ce 3+ are investigated.With Si 4+ doped,the emission spectrum shows a blue shift due to a decrease of the splitting of 5d levels of Ce 3+ ion.The thermal stability is greatly improved by adding Si 4+ because the activation energy E increases from 0.1836 eV to 0.2401 eV.The study of the decay times against temperature for various doping concentrations of Si 4+ shows that the calculated nonradiative decay rate is affected by Si 4+ substitution.The results are explained by the configurational coordinate diagram.
英文摘要：
A series of aAl5O12：Ce （YAG：Ce） phosphors doped with different Si4＋ concentrations is prepared by solid-state reaction. The temperature dependent characteristics of luminescent spectrum and decay time of Ce3＋ are investigated. With Si4＋ doped, the emission spectrum shows a blue shift clue to a decrease of the splitting of 5d levels of Ce3＋ ion. The thermal stability is greatly improved by adding Si4＋ because the activation energy AE increases from 0.1836 eV to 0.2401 eV. The study of the decay times against temperature for various doping concentrations of Si4＋ shows that the calculated nonradiative decay rate is affected by Si4＋ substitution. The results are explained by the configurational coordinate diagram.
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