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首页> 外文期刊>Journal of Physics, D. Applied Physics: A Europhysics Journal >Kinetics of transient electroluminescence in organic light emitting diodes
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Kinetics of transient electroluminescence in organic light emitting diodes

机译：有机发光二极管中瞬态电致发光的动力学

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摘要

Mathematical simulation on the rise and decay kinetics of transient electroluminescence (EL) in organic light emitting diodes (OLEDs) is presented. The transient EL is studied with respect to a step voltage pulse. While rising, for lower values of time, the EL intensity shows a quadratic dependence on (t ? tdel), where tdel is the time delay observed in the onset of EL, and finally attains saturation at a sufficiently large time. When the applied voltage is switched off, the initial EL decay shows an exponential dependence on (t ? tdec), where tdec is the time when the voltage is switched off. The simulated results are compared with the transient EL performance of a bilayer OLED based on small molecular bis(2-methyl 8-hydroxyquinoline)(triphenyl siloxy) aluminium (SAlq). Transient EL studies have been carried out at different voltage pulse amplitudes. The simulated results show good agreement with experimental data. Using these simulated results the lifetime of the excitons in SAlq has also been calculated.
机译：提出了关于有机发光二极管（OLED）中瞬态电致发光（EL）的上升和衰减动力学的数学模拟。关于阶跃电压脉冲研究瞬态EL。在上升时，对于较低的时间值，EL强度显示出对（t？tdel）的二次依赖性，其中tdel是在EL发生时观察到的时间延迟，并最终在足够大的时间达到饱和。当施加的电压关闭时，初始的EL衰减显示出与（t？tdec）的指数关系，其中tdec是电压关闭的时间。将模拟结果与基于小分子双（2-甲基8-羟基喹啉）（三苯基甲硅烷氧基）铝（SAlq）的双层OLED的瞬态EL性能进行了比较。已经在不同的电压脉冲幅度下进行了瞬态EL研究。仿真结果与实验数据吻合良好。使用这些模拟结果，还计算了SAlq中激子的寿命。

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