Combining structures on different length scales in ray tracing: analysis of optical losses in solar cell modules
Combining structures on different length scales in ray tracing: analysis of optical losses in solar cell modules
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DOI：
10.1007/s11082-014-0078-x
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发表时间：
2014-12
影响因子：
3
通讯作者：
Matthias Winter;M. Vogt;H. Holst;P. Altermatt
中科院分区：
文献类型：
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作者：
Matthias Winter;M. Vogt;H. Holst;P. Altermatt
太阳能电池组件由不同长度尺度上的光学相关几何结构组成。虽然整个组件和太阳能电池的尺寸为米和厘米，但刻蚀在单晶硅电池上的金字塔(用于增强光捕获)的尺寸在微米范围内。不能大幅减少模拟域以仍然捕获模块特定的效果。因此，到目前为止，这些长度尺度上的巨大差异阻碍了对整个模块的详细光线跟踪分析。在这项工作中，我们开发了一种光线跟踪方法，将大小尺度的几何图形分成不同的模拟域，模拟的光子根据需要在不同的域之间自动切换。通过这种方法，可以在合理的时间内在当前的台式计算机上模拟整个模块。我们通过分析大规模生产的太阳能电池组件以及开发中的无封装剂的组件中的光学损失来演示该方法的能力。我们的光线跟踪方法可以应用于任何包含不同长度尺度的几何结构。
Solar cell modules consist of optically relevant geometric structures on very different length scales. While the whole module and the solar cells are on a scale of meters and centimeters, the pyramids etched on mono-crystalline Si cells (for enhancing light-trapping) have sizes in the micrometer range. The simulation domain cannot be reduced substantially to still capture module specific effects. Hence, these large differences in length scale have so far prohibited a detailed ray tracing analysis of entire modules. In this work, we developed a ray tracing approach that separates large and small scale geometries into different simulation domains; the simulated photon automatically switches between the different domains as needed. With this approach, it is possible to simulate whole modules on current desktop computers within reasonable time. We demonstrate the capabilities of this method by analyzing the optical losses in solar cell modules from mass production, as well as in modules under development that have no encapsulant. Our ray tracing method can be applied to any geometric structures containing different length scales.