The quality of the perovskite absorber is known to be the most crucial parameter for the photovoltaic performance of perovskite solar cells. By combining the one-step anti-solvent engineering method followed by gas blowing, MAPbI₃ film containing highly oriented multi-crystalline nanograins (150∼500 nm) was made first. A user-friendly, simple, large-throughput, and reproducible post-solvent annealing (made by treating the film with anti-solvent containing H₂O under spinning) was used to enlarge the perovskite grains up to 1.5 μm. Inverted (p-i-n) perovskite solar cells based on this highly ordered, large-grain MAPbI₃ film achieve the highest efficiency of 21% with an extremely high fill factor (FF) of 86%. The high-efficiency cell shows almost no current hysteresis and is stable under 1 sun illustration in a glovebox or standing in the ambient atmosphere (20∼25 °C, ca. 30% humidity) under room lighting (T5 lamp, 500 lux). A creative method combining the gas blowing with quick and simple post-treatment to prepare a highly oriented MAPbI₃ film with large multi-crystalline grains to achieve excellent photovoltaic performance was demonstrated. This creative film-preparation method was also successfully applied to fabricate large area MAPbI₃ film for high-efficiency perovskite mini-modules. Being able to control the crystallization and growth of perovskite crystallites definitely makes the fabrication of perovskite solar cells more reproducible.

中文翻译：

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一种用于高效钙钛矿太阳能电池的高取向MAPbI ₃微晶的制备方法，以实现86％的填充因子

已知钙钛矿吸收剂的质量是钙钛矿太阳能电池的光伏性能的最关键参数。通过结合一步式反溶剂工程方法，然后进行吹气，首先制得了包含高度取向的多晶纳米晶粒（150-500 nm）的MAPbI ₃膜。使用用户友好，简单，大通量且可重现的溶剂后退火（通过在纺丝后用含H ₂ O的抗溶剂处理薄膜制成）可将钙钛矿晶粒扩大到1.5μm。基于这种高度有序的大颗粒MAPbI _3的倒置（针形）钙钛矿太阳能电池薄膜的最高效率达到21％，而极高的填充因子（FF）为86％。高效电池几乎没有电流滞后，在杂物箱中的1个阳光下或在室内照明（T5灯，500 lux）下（在20〜25°C，约30％的湿度下）处于环境中时都稳定。展示了一种创新的方法，该方法将吹气与快速简单的后处理相结合，以制备具有大的多晶粒的高度取向的MAPbI ₃膜，从而获得出色的光伏性能。这种创造性的薄膜制备方法也成功地应用于制造大面积MAPbI ₃用于高效钙钛矿微型模块的薄膜。能够控制钙钛矿微晶的结晶和生长，无疑使钙钛矿太阳能电池的制造更具可重复性。