Abstract In this work, random inverted nanopyramids (INPs) are fabricated as light trapping structures on ultrathin c-Si through a simple and cost-effective wet chemical method, followed by a systematic investigation of the photo-capturing properties of INPs combining experiments and simulations. In comprehensive consideration of thickness loss and light trapping performance, random INPs are applied onto 45 μm ultrathin c-Si solar cell and a high short-current density (Jsc) (36.6 mA/cm2) and energy-conversion efficiency (17.0%) are achieved, which are 0.3 mA/cm2 and 0.13% respectively higher than that in micro pyramid textured one, and our electrical simulation also demonstrates that the advantages of INPs are more obvious on thinner c-Si compared with conventional micro pyramids. Finally, through electrical simulation, INPs textured 45 μm c-Si solar cell is expected to have a large improvement room for efficiency by controlling the front and rear surface recombination velocity. All the findings not only offer additional insight into the light-trapping mechanism in the random INPs but also provide controllable and efficient broadband light harvesters for next-generation cost effective flexible photovoltaics.

中文翻译：

---

随机倒置纳米锥作为超薄柔性c-Si太阳能电池高效光捕获结构的优越性

摘要 在这项工作中，通过简单且具有成本效益的湿化学方法在超薄 c-Si 上制备随机倒置纳米锥 (INPs) 作为光捕获结构，然后结合实验和模拟系统研究 INPs 的光捕获性能。 . 综合考虑厚度损失和光捕获性能，随机INPs应用于45μm超薄c-Si太阳能电池，具有高短电流密度（Jsc）（36.6 mA/cm2）和能量转换效率（17.0%）达到了，分别比微金字塔纹理的高 0.3 mA/cm2 和 0.13%，我们的电学模拟也表明，与传统的微金字塔相比，INP 在更薄的 c-Si 上的优势更加明显。最后，通过电气仿真，通过控制前后表面复合速度，INPs 纹理的 45 μm c-Si 太阳能电池有望在效率上有很大的提升空间。所有这些发现不仅为随机 INP 中的光捕获机制提供了额外的见解，而且还为下一代具有成本效益的柔性光伏提供了可控且高效的宽带光收集器。