Many theoretical analyses for perovskite/c‐Si monolithic tandem solar cells (TSCs) have shown optical optimization and high efficiency limits, but they use many idealized assumptions and draw some unpractical conclusions for experiments. In this work, we have introduced a composite method combining the finite difference time domain and light path analysis for the first time. By using this method, we have systematically calculated perovskite/c‐Si monolithic TSCs with inverted architecture based on realistic solar cell parameters. Theoretical results have demonstrated very good match of the experimental external quantum efficiencies of both subcells. More importantly, from optical and electrical point of view, we have analyzed current losses of such TSCs and proposed detailed optimization for achieving high efficiency. Finally, we have presented improved configuration of perovskite/c‐Si monolithic TSCs with addition of pyramids structure in front surface, which can effectively increase the tandem cell efficiency to 29.05%. This work can be served as a practical guidance for the realization of high‐efficient perovskite/c‐Si monolithic TSCs.

中文翻译：

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具有逼真的倒置结构的钙钛矿/ c-Si串联太阳能电池：通过光学优化实现高效率

钙钛矿/ c-Si整体串联太阳能电池（TSC）的许多理论分析均显示出光学优化和高效率极限，但它们使用了许多理想化的假设，并为实验得出了一些不切实际的结论。在这项工作中，我们首次引入了一种将时域有限差分与光路分析相结合的复合方法。通过使用这种方法，我们已经根据实际的太阳能电池参数系统地计算了具有倒置结构的钙钛矿/ c-Si整体式TSC。理论结果证明两个子电池的实验外部量子效率非常匹配。更重要的是，从光学和电气角度来看，我们已经分析了此类TSC的电流损耗，并提出了实现高效率的详细优化方法。最后，我们提出了改进的钙钛矿/ c-Si整体TSC配置，并在前表面增加了金字塔结构，这可以有效地将串联电池效率提高到29.05％。这项工作可以作为实现高效钙钛矿/ c-Si整体TSC的实用指南。