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Towards fully self-consistent optoelectronic simulation of planar devices

机译：迈向平面设备的完全自洽光电仿真

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摘要

Photon recycling plays an important role in various optoelectronic devices, such as thin-film solar cells and intracavity double-diode structures presently studied for electroluminescent cooling. However, a complete description of photon recycling requires developing fully self-consistent simulation tools of photon and electronic charge transport in realistic device structures. In this paper, we describe a possible route towards such simulation tools in planar devices by combining the radiative transfer (RT) equation of photon transport with the drift-diffusion (DD) equations of electron and hole dynamics. We investigate the feasibility of the approach by selected proof-of-principle device studies. The results indicate that combining the RT and DD models not only yields the expected device characteristics, but also produces new insight into the pertinent local emission and absorption properties within the device structures. In particular, the model allows to accurately investigate how emission directivity and saturation affect the coupling coefficient in the double diode structures, showing that the main contribution to the coupling coefficient arises from the reflectivity of the top contact. For completeness, we also discuss how interference affects photon transport in resonant devices by an example calculation using the quantized fluctuational electrodynamics framework, paving way for self-consistent modeling tools that also account for wave-optical effects.
机译：光子回收在各种光电设备中起着重要作用，例如目前研究用于电致发光冷却的薄膜太阳能电池和腔内双二极管结构。但是，对光子回收的完整描述要求开发在现实的设备结构中光子和电子电荷传输的完全自洽的仿真工具。在本文中，我们通过将光子传输的辐射传输（RT）方程与电子和空穴动力学的漂移扩散（DD）方程相结合，描述了在平面设备中使用此类仿真工具的可能途径。我们通过选定的原理验证装置研究来研究该方法的可行性。结果表明，将RT和DD模型组合在一起不仅可以获得预期的器件特性，而且还可以对器件结构内相关的局部发射和吸收特性产生新的见解。尤其是，该模型可以准确地研究发射方向性和饱和度如何影响双二极管结构中的耦合系数，从而表明对耦合系数的主要贡献来自于顶部触点的反射率。为了完整起见，我们还通过使用定量涨落电动力学框架的示例计算，讨论了干扰如何影响共振设备中​​的光子传输，这也为自洽的建模工具铺平了道路，该工具还考虑了波光学效应。

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