Hunan Key Laboratory of Nanophotonics and Devices, School of Physics and Electronics, Central South University, Changsha, 410083, P. R. China.
State Key Laboratory of Power System, Department of Electrical Engineering, Tsinghua University, Beijing, 100084, P. R. China.
Small. 2023 Jun;19(24):e2300374. doi: 10.1002/smll.202300374. Epub 2023 Mar 15.
Perovskite solar cells (PSCs) have emerged as one of the most promising and competitive photovoltaic technologies, and doctor-blading is a facile and robust deposition technique to efficiently fabricate PSCs in large scale, especially matching with roll-to-roll process. Herein, it demonstrates the encouraging results of one-step, antisolvent-free doctor-bladed methylammonium lead iodide (CH NH PbI MAPbI ) PSCs under a wide range of humidity from 45% to 82%. A synergy strategy of ionic-liquid methylammonium acetate (MAAc) and molecular phenylurea additives is developed to modulate the morphology and crystallization process of MAPbI perovskite film, leading to high-quality MAPbI perovskite film with large-size crystal, low defect density, and ultrasmooth surface. Impressive power conversion efficiency (PCE) of 20.34% is achieved for doctor-bladed PSCs under the humidity over 80% with a device structure of ITO/SnO /MAPbI /Spiro-OMeTAD/Ag. It is the highest PCEs for one-step solution-processed MAPbI PSCs without antisolvent assistance. The research provides a facile and robust large-scale deposition technique to fabricate highly efficient and stable PSCs under a wide range of humidity, even with the humidity over 80%.
钙钛矿太阳能电池（PSCs）已成为最有前途和竞争力的光伏技术之一，刮刀涂布是一种简便而强大的沉积技术，可有效地大规模制备 PSCs，特别是与卷对卷工艺相匹配。本文展示了在 45%至 82%的广泛湿度范围内，一步法、无反溶剂刮刀涂布甲基碘化铵铅（CHNH PbI，MAPbI）PSC 的令人鼓舞的结果。开发了离子液体甲基醋酸铵（MAAc）和分子苯脲添加剂的协同策略，以调节 MAPbI 钙钛矿薄膜的形态和结晶过程，从而获得具有大尺寸晶体、低缺陷密度和超光滑表面的高质量 MAPbI 钙钛矿薄膜。采用 ITO/SnO/MAPbI/Spiro-OMeTAD/Ag 的器件结构，在湿度超过 80%的条件下，刮刀涂布 PSCs 的功率转换效率（PCE）达到 20.34%，这是在没有反溶剂辅助的情况下，一步溶液法制备 MAPbI PSCs 的最高 PCE 值。该研究提供了一种简便而强大的大规模沉积技术，可在广泛的湿度范围内，甚至在湿度超过 80%的条件下，制备高效稳定的 PSCs。
