Abstract Hydrogenated amorphous silicon (a-Si:H) solar cells have some performance limitations related to the mobility and lifetime of their carriers. For this reason, it is interesting to explore thin-film solutions, achieving a tradeoff between photons optical absorption and the electrical path of the carriers to get the optimum thickness. In this work, we propose the insertion of a metasurface based on a cross-patterned ITO contact film, where the crosses are filled with nanospheres. We numerically demonstrate that this configuration improves the photogenerated current up to a 40% by means of the resonant effects produced by the metasurface, being independent on the impinging light polarization. Light handling mechanisms guide light into the active and auxiliary layers, increasing the effective absorption and mitigating the Staebler-Wronski effect. The selection of optimum materials and parameters results in nanospheres of ZnO with a 220 nm radius.

中文翻译：

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通过纳米粒子交叉堆积的超表面促进超薄 aSi-H 太阳能电池的吸收

摘要 氢化非晶硅 (a-Si:H) 太阳能电池在其载流子的迁移率和寿命方面存在一些性能限制。出于这个原因，探索薄膜解决方案很有趣，在光子光吸收和载流子的电路径之间实现权衡以获得最佳厚度。在这项工作中，我们建议插入基于交叉图案 ITO 接触膜的超表面，其中交叉填充纳米球。我们从数值上证明，这种配置通过超表面产生的共振效应将光生电流提高了 40%，与入射光偏振无关。光处理机制将光引导到活性层和辅助层，增加有效吸收并减轻 Staebler-Wronski 效应。最佳材料和参数的选择导致了半径为 220 nm 的 ZnO 纳米球。