The recent surge of interest in Sn–Pb perovskite has largely increased due to its ideal band gap for single junction solar cells and suitability for incorporation into all-perovskite tandem solar cells. In this study, we focus on reducing the optical loss of Sn–Pb perovskite solar cells, specifically those with the ITO/PEDOT:PSS/Sn–Pb perovskite/C60/BCP/Ag inverted structure. This is achieved through the innovative application of a polystyrene (PS) sphere patterning method, used to create a textured surface on PEDOT:PSS. By adjusting the concentration of PS spheres in PEDOT:PSS, the textured device showed a 7% increase in photocurrent compared to its planar counterpart. This led to an enhanced power conversion efficiency of 21.0%, which further improved to 21.6% when an anti-reflection coating was applied to the glass side. Further confirmation of these benefits is demonstrated through a significant increase in external quantum efficiency (EQE) response. This result mirrors the reduction in reflectance and enhancement in light absorption exhibited by the textured layer. The findings of this study present an easy method for creating textured PEDOT:PSS and highlight its crucial role in reducing optical loss during the development of Sn–Pb perovskite solar cells.

中文翻译：

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通过混合 Sn-Pb 钙钛矿太阳能电池中的纹理化 PEDOT:PSS 减少光学反射损耗

最近，人们对 Sn-Pb 钙钛矿的兴趣大幅增加，因为它对于单结太阳能电池来说是理想的带隙，并且适合纳入全钙钛矿串联太阳能电池。在本研究中，我们专注于降低 Sn-Pb 钙钛矿太阳能电池的光学损耗，特别是具有 ITO/PEDOT:PSS/Sn-Pb 钙钛矿/C60/BCP/Ag 倒置结构的太阳能电池。这是通过聚苯乙烯 (PS) 球体图案方法的创新应用来实现的，该方法用于在 PEDOT:PSS 上创建纹理表面。通过调整 PEDOT:PSS 中 PS 球的浓度，与平面器件相比，纹理器件的光电流增加了 7%。这使得电力转换效率提高了 21.0%，当在玻璃侧涂有减反射涂层时，进一步提高到 21.6%。通过外部量子效率 (EQE) 响应的显着提高，进一步证实了这些优势。该结果反映了纹理层表现出的反射率降低和光吸收增强。这项研究的结果提出了一种创建纹理化 PEDOT:PSS 的简单方法，并强调了其在 Sn-Pb 钙钛矿太阳能电池开发过程中减少光学损耗的关键作用。