It is highly desirable to develop large‐scale, low‐cost fabrication processes for flexible perovskite solar cells (f‐PSCs) under ambient conditions for accelerating their potential commercialization. Roll‐to‐roll (R2R) printing technology enables high‐output manufacturing and is well suited for commercially processing f‐PSCs. Herein, triple‐cation f‐PSCs are developed with a planar heterojunction structure consisting of polyethylene‐2,6‐naphthalate/indium tin oxide/SnO₂/perovskite/spiro‐OMeTAD/Ag via a combination of R2R microgravure printing and slot‐die coating under ambient conditions with a relative humidity of ≈40%. A mixture of isopropanol and water is used to dilute an as‐purchased SnO₂ colloid solution and modify the contact between the electron‐transport layer (ETL) and substrate, leading to a smooth morphology of the R2R‐printed ETL SnO₂ layer. Furthermore, suitable intrinsic organic salt additives and the N₂ gas blowing‐assisted process are introduced to effectively improve the crystallization of the perovskite, resulting in a high‐quality perovskite film via R2R. After the optimization, the f‐PSCs based on the R2R‐printed ETL SnO₂ and the perovskite film under an ambient condition show a power conversion efficiency (PCE) of up to 10.56% and an average PCE of 9.97%. This study provides a potential strategy for commercially fabricating f‐PSCs via a scalable and efficient R2R printing process.

中文翻译：

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通过连续的辊对辊微凹版印刷和槽模涂布沉积工艺制造的柔性平面异质结钙钛矿太阳能电池

迫切需要在环境条件下为柔性钙钛矿太阳能电池（f- PSC）开发大规模，低成本的制造工艺，以加速其潜在的商业化。卷对卷（R2R）打印技术可实现高产量的制造，非常适合商业加工f- PSC。在此，三阳离子f -PSC通过R2R微凹版印刷和狭缝模头的组合开发而成，具有平面异质结结构，该结构由聚2,6-萘二甲酸乙二醇酯/氧化铟锡/ SnO ₂ /钙钛矿/螺-OMeTAD / Ag组成在相对湿度约为40％的环境条件下进行喷涂。异丙醇和水的混合物用于稀释购买的SnO ₂胶体溶液并改变电子传输层（ETL）与基底之间的接触，从而导致R2R印刷的ETL SnO ₂层的形态平滑。此外，还引入了合适的固有有机盐添加剂和N ₂气吹辅助工艺，以有效改善钙钛矿的结晶，从而通过R2R获得了高质量的钙钛矿薄膜。优化之后，基于R2R印刷的ETL SnO ₂和钙钛矿薄膜的f- PSC在环境条件下的功率转换效率（PCE）高达10.56％，平均PCE为9.97％。这项研究为商业化制造f提供了潜在的策略。通过可扩展且高效的R2R打印过程进行PSC。