One potential advantage of perovskite solar cells (PSCs) is the ability to solution process the precursors and deposit films from solution^1,2. At present, spin coating, blade coating, spray coating, inkjet printing and slot-die printing have been investigated to deposit hybrid perovskite thin films^3,4,5,6. Here we expand the range of deposition methods to include screen-printing, enabled by a stable and viscosity-adjustable (40–44,000 cP) perovskite ink made from a methylammonium acetate ionic liquid solvent. We demonstrate control over perovskite thin-film thickness (from about 120 nm to about 1,200 nm), area (from 0.5 × 0.5 cm² to 5 × 5 cm²) and patterning on different substrates. Printing rates in excess of 20 cm s⁻¹ and close to 100% ink use were achieved. Using this deposition method in ambient air and regardless of humidity, we obtained the best efficiencies of 20.52% (0.05 cm²) and 18.12% (1 cm²) compared with 20.13% and 12.52%, respectively, for the spin-coated thin films in normal devices with thermally evaporated metal electrodes. Most notably, fully screen-printing devices with a single machine in ambient air have been successfully explored. The corresponding photovoltaic cells exhibit high efficiencies of 14.98%, 13.53% and 11.80% on 0.05-cm², 1.00-cm² and 16.37-cm² (small-module) areas, respectively, along with 96.75% of the initial efficiency retained over 300 h of operation at maximum power point.

钙钛矿太阳能电池 (PSC) 的一个潜在优势是能够从溶液^1,2中对前体和沉积膜进行溶液处理。目前，已经研究了旋涂、刮刀涂层、喷涂、喷墨印刷和狭缝模头印刷来沉积混合钙钛矿薄膜^3,4,5,6。在这里，我们扩大了沉积方法的范围，包括丝网印刷，这是由一种稳定且粘度可调 (40–44,000 cP) 的钙钛矿油墨实现的，该油墨由甲基乙酸铵离子液体溶剂制成。我们展示了对钙钛矿薄膜厚度（从大约 120 nm 到大约 1,200 nm）、面积（从 0.5 × 0.5 cm ²到 5 × 5 cm ²）和不同基板上的图案的控制。打印速率超过 20 cm s ^-1并实现了接近 100% 的墨水使用率。^{在环境空气中使用这种沉积方法，无论湿度如何，我们获得了 20.52% (0.05 cm 2} ) 和 18.12% (1 cm ² )的最佳效率，而旋涂薄膜的效率分别为 20.13% 和12.52%在带有热蒸发金属电极的普通设备中。最值得注意的是，已经成功探索了在环境空气中使用单台机器的全丝网印刷设备。^{相应的光伏电池在 0.05-cm 2}、1.00-cm ²和 16.37-cm ² （小模块）面积上分别表现出 14.98%、13.53% 和 11.80% 的高效率，以及超过 96.75% 的初始效率。在最大功率点运行 300 小时。