Anti-reflection film (ARF) with nanostructure plays an important role in reducing surface reflectance and improving power generation performance of solar cells. However, the reduction of reflectance is over-concerned during the design process of ARF, while the actual electrical performance of solar cells caused by structure changes of ARF tends to be ignored. In present study, a two-dimension photo-electric coupling model of thin GaAs cell with moth-eye nanostructured ARF was established, and its optical and electrical performance were investigated. Firstly, the optical and electrical performance of GaAs cells with and without ARF were compared to illustrate the importance of ARF for GaAs cell. Then, the effects of nanostructure parameters of ARF on optical and electrical performance were investigated, and a significant variation of the maximum efficiency (Δ = 1.35%) was observed. After that, the energy transmission process of two randomly sampled cases were comparatively analyzed to demonstrate that only taking the reflectance as evaluation index during the design process of ARF is unreasonable. The maximum electrical power output () or efficiency () was recommended as the appropriate evaluation index. Finally, based on the proposed evaluation index, a multi-parameters optimization was performed for moth-eye structure ARF, and the optimal case was derived with = 100 nm, = 100 nm, = 0.453 and = 50 nm. The corresponding maximum efficiency is 25.31%, which is 4.82% higher than that of GaAs cell without ARF, and is even 0.22% higher than the maximum in samples.

中文翻译：

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基于光电耦合模型的薄砷化镓太阳能电池纳米结构增透膜设计与优化

具有纳米结构的减反射膜（ARF）在降低太阳能电池表面反射率、提高发电性能方面发挥着重要作用。然而，在ARF设计过程中过度关注反射率的降低，而往往忽视ARF结构变化引起的太阳能电池的实际电性能。本研究建立了具有蛾眼纳米结构ARF的薄GaAs电池的二维光电耦合模型，并研究了其光学和电学性能。首先，比较了有ARF和没有ARF的GaAs电池的光学和电学性能，以说明ARF对于GaAs电池的重要性。然后，研究了ARF纳米结构参数对光学和电学性能的影响，观察到最大效率的显着变化（Δ = 1.35%）。然后对两个随机采样案例的能量传输过程进行对比分析，证明在ARF设计过程中仅以反射率作为评价指标是不合理的。推荐最大电功率输出（）或效率（）作为合适的评价指标。最后，基于提出的评价指标，对蛾眼结构ARF进行多参数优化，得出= 100 nm、= 100 nm、= 0.453和= 50 nm的最佳情况。相应的最大效率为25.31%，比没有ARF的GaAs电池高4.82%，甚至比样品中的最大值高0.22%。