Coupled 3D master equation and 1D drift‐diffusion approach for advanced OLED modeling,Journal of the Society for Information Display

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Coupled 3D master equation and 1D drift‐diffusion approach for advanced OLED modeling
Journal of the Society for Information Display ( IF 1.7 ) Pub Date : 2020-04-21 , DOI: 10.1002/jsid.903
Simon Zeder _{1,

2} , Christoph Kirsch ₃ , Urs Aeberhard ₂ , Balthasar Blülle ₂ , Sandra Jenatsch ₂ , Beat Ruhstaller _{2,

3}

Affiliation

A novel simulation approach for excitonic organic light‐emitting diodes (OLEDs) is established by combining a continuous one‐dimensional (1D) drift‐diffusion (DD) model for the charge carrier dynamics with a three‐dimensional (3D) master equation (ME) model describing the exciton dynamics in a multilayer OLED stack with an additional coupling to a thin‐film optics solver. This approach effectively combines the computational efficiency of the 1D DD solver with the physical accuracy of a discrete 3D ME model, where excitonic long‐range interactions for energy transfer can be taken into account. The coupling is established through different possible charge recombination types as well as the carrier densities themselves. We show that such a hybrid approach can efficiently and accurately describe steady‐state and transient behavior of optoelectronic devices reported in literature. Such a tool will facilitate the optimization and characterization of multilayer OLEDs and other organic semiconductor devices.

中文翻译：

结合3D主方程和1D漂移扩散方法进行高级OLED建模

通过将用于电荷载流子动力学的连续一维（1D）漂移扩散（DD）模型与三维（3D）主方程（ME）相结合，建立了用于激子有机发光二极管（OLED）的新颖仿真方法）模型，描述了多层OLED叠层中的激子动力学，并附加了与薄膜光学求解器的耦合。这种方法有效地将一维DD求解器的计算效率与离散3D ME模型的物理精度结合在一起，在该模型中，可以考虑激子的长程相互作用进行能量转移。通过不同的可能电荷复合类型以及载流子密度本身来建立耦合。我们表明，这种混合方法可以有效，准确地描述文献中报道的光电器件的稳态和瞬态行为。这样的工具将有助于多层OLED和其他有机半导体器件的优化和表征。

更新日期：2020-04-21

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