Perovskite solar cells (PSCs) have gained tremendous attention owing to their promising photovoltaic performance, surpassing all the alternative technologies based on solution-processed materials. PSCs displaying record efficiencies contain hole transporting material (HTM) and gold back contact, which are too expensive for large-scale deployment. Although the HTM-free PSCs have been reported, a few can be used in tandem configuration, an architecture that is warranted to commercialize PSCs. This work presents, to the best of our knowledge, the first HTM-free and Au-free PSCs that are semi-transparent in the IR region (desired for tandem cells) with an efficiency of 8.3 %. We systematically investigate the effect of varying the thickness of active and charge conducting layers on the photovoltaic performance of PSCs. Besides, semitransparency, another advantage of the scaffold is its simplicity: a fully printable mesoporous structure consisting of a TiO₂ layer (400 nm), Al₂O₃ as a separator layer (500 nm) and tin-doped indium oxide (ITO) layer (5 μm), rendering our work highly pertinent for upscaling and large-scale applications.

中文翻译：

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一种完全可印刷的无空穴传输器半透明钙钛矿太阳能电池

钙钛矿太阳能电池（PSC）由于其有前途的光伏性能而获得了极大的关注，超越了所有基于溶液处理材料的替代技术。显示出创纪录效率的 PSC 包含空穴传输材料 (HTM) 和金背接触，这对于大规模部署来说太昂贵了。尽管已经报道了无 HTM 的 PSC，但有一些可用于串联配置，这种架构保证了 PSC 的商业化。据我们所知，这项工作展示了第一个在 IR 区域（串联电池所需）半透明的无 HTM 和无金 PSC，效率为 8.3%。我们系统地研究了改变活性层和电荷传导层的厚度对 PSC 光伏性能的影响。此外，半透明，₂层 (400 nm)、Al ₂ O ₃作为分隔层 (500 nm) 和锡掺杂氧化铟 (ITO) 层 (5 μm)，使我们的工作非常适合升级和大规模应用。