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Nonlinear dynamics of corrugated doping fronts in organic optoelectronic devices

机译：有机光电器件中波纹状掺杂前沿的非线性动力学

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摘要

Recently, it was demonstrated that electrochemical doping fronts in organic semiconductors exhibit a new fundamental instability growing from multidimensional perturbations [Bychkov et al., Phys. Rev. Lett. 107, 016103 (2011)]. In the instability development, linear growth of tiny perturbations goes over into a nonlinear stage of strongly distorted doping fronts. Here we develop the nonlinear theory of the doping front instability and predict the key parameters of a corrugated doping front, such as its velocity, in close agreement with the experimental data. We show that the instability makes the electrochemical doping process considerably faster. We obtain the self-similar properties of the frpnt shape corresponding to the maximal propagation velocity, which allows for a wide range of controlling the doping process in the experiments. The developed theory provides the guide for optimizing the performance of organic optoelectronic devices such as light-emitting electrochemical cells.
机译：近来，已经证明有机半导体中的电化学掺杂前沿表现出由于多维扰动而增长的新的基本不稳定性[Bychkov等，Phys。牧师107，016103（2011）]。在不稳定的发展中，微小扰动的线性增长进入了强烈变形的掺杂前沿的非线性阶段。在这里，我们发展了掺杂前沿不稳定的非线性理论，并预测了波纹状掺杂前沿的关键参数，例如速度，与实验数据非常吻合。我们表明，不稳定性使电化学掺杂过程明显加快。我们获得了与最大传播速度相对应的frpnt形状的自相似特性，从而可以在实验中广泛地控制掺杂过程。发达的理论为优化有机光电器件（例如发光电化学电池）的性能提供了指导。

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