Efficient and Stable Self-Passivation Perovskite Solar Cells Prepared in Ambient Air Based on an Antisolvent-Free Method
Efficient and Stable Self-Passivation Perovskite Solar Cells Prepared in Ambient Air Based on an Antisolvent-Free Method
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DOI：
10.1021/acsaelm.3c01283
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发表时间：
2023-11
影响因子：
4.7
通讯作者：
Qiqi Zhang;Seid Yimer Abate;Guorong Ma;Y. Qi;Jada Emodogo;Kira Williams;Shafi Muhammad;
中科院分区：
文献类型：
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作者：
Qiqi Zhang;Seid Yimer Abate;Guorong Ma;Y. Qi;Jada Emodogo;Kira Williams;Shafi Muhammad;
溶液可加工钙钛矿太阳能电池（PSCs）是最有希望商业化的候选者之一。然而，钙钛矿薄膜的制备方法受到惰性气体气氛下强制性抗溶剂工艺的限制，严重影响了其量产。在本研究中，我们开发了一种不需要在空气中滴入抗溶剂的钙钛矿薄膜制备方法。我们采用不同的溶剂制备钙钛矿薄膜，研究了不同溶剂对钙钛矿成核和形貌的影响。其中，用二甲基乙酰胺（DMAc）制备的钙钛矿溶解度低，与PbI2相互作用强，表现出高度结晶的钙钛矿黑色相，无抗溶剂滴。此外，我们发现钙钛矿浓度对钙钛矿薄膜质量起着重要的作用，其中高浓度的dmac基钙钛矿在空气中通过无抗溶剂的方法产生了光滑致密的钙钛矿薄膜。使用该技术制造的PSCs具有20.1%的冠军功率转换效率（PCE）。同时，叶片包覆法制备的最佳器件PCE也达到18%，且未包覆的器件在空气中放置47天后，其稳定性极佳，保持了初始效率的90%以上。这项工作为高性能无抗溶剂mapbi3基太阳能电池的可控制造提供了一种简单而经济的方法。
Solution processable perovskite solar cells (PSCs) are one of the most promising candidates for commercialization. However, the perovskite film preparation method is limited by the mandatory antisolvent process under an inert gas atmosphere which significantly influenced its mass production. In this study, we developed a perovskite film preparation without the requirement of antisolvent dripping in air. We employed various solvents to prepare perovskite films and studied their influence on perovskite nucleation and morphology for the respective solvents. Among them, the perovskite prepared using dimethylacetamide (DMAc), which has low solubility and high interaction with PbI2, demonstrated a highly crystalline perovskite black phase without antisolvent dripping. Furthermore, we found that the perovskite concentration played an important role in the perovskite film quality, where the high concentration DMAc-based perovskite produced a smooth and dense perovskite film by the antisolvent-free method in air. PSCs fabricated using this technique delivered a champion power conversion efficiency (PCE) of 20.1%. At the same time, the best device prepared by the blade-coated method also got 18% PCE. Moreover, the unencapsulated devices exhibited excellent stability, which retained more than 90% of their initial efficiency after 47 days in air. This work provides a facile and cost-effective method toward a controllable fabrication of high-performance antisolvent-free MAPbI3-based solar cells.