局域化电子态集体的荧光
Luminescence of localized\|electron\|state ensemble
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摘要: 载流子局域化对固体材料的光电性质有着深刻的影响.长期以来，人们就发现许多固体材料的发光异常行为与固体中电子态的局域化密切相关.文章介绍了作者最近所发展的一个局域态荧光模型.借助于一个新推导出来的局域化电子态的分布函数，文章作者发展出了该模型.该模型不但定量地解释了局域态集体荧光的温度依赖的异常现象，而且清晰地揭示了异常现象背后的载流子热动力学物理.文章还介绍了该模型在一些材料的荧光数据分析中的应用.Abstract: The localization of carriers has a profound effect on the optical and electrical properties of solid state materials. It has been known for a long time that anomalous luminescence behavior is associated with the localization of carriers involved in the luminescence processes. Here we introduce a newly developed model for luminescence from localized\|state ensembles. The theory is based on a new distribution function obtained by solving a rate equation. With this model we can not only quantitatively interpret anomalies observed in the temperature dependence of the localized\|state luminescence but also clearly reveal the physical mechanisms behind them. Applications of the model in the quantitative analysis of the luminescence spectra in some typical materials are presented.
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