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Here, we report that the combination of 1\u2010bromo\u20104\u2010(methylsulfinyl) benzene (BBMS) and SnF<jats:sub>2<\/jats:sub> greatly reduced the Urbach energy of perovskite films, and largely restrained the oxidation of Sn<jats:sup>2+<\/jats:sup>. With the help of density functional theory calculations, we clarified the interactions between BBMS and perovskite were responsible for the improvements. As a result, a high efficiency of &gt;22\u2009% was obtained for the Sn\u2212Pb alloy\u2010based solar cells treated by BBMS and SnF<jats:sub>2<\/jats:sub>. More importantly, the BBMS\u2010treated devices demonstrated outstanding stability, retaining 98\u2009% of its original efficiency after heating at 60\u2009\u00b0C for 2660\u2005h under N<jats:sub>2<\/jats:sub>.<\/jats:p>","DOI":"10.1002\/anie.202201209","type":"journal-article","created":{"date-parts":[[2022,3,25]],"date-time":"2022-03-25T09:21:16Z","timestamp":1648200076000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":80,"title":["Reducing Energy Disorder for Efficient and Stable Sn\u2212Pb Alloyed Perovskite Solar Cells."],"prefix":"10.1002","volume":"61","author":[{"given":"Cheng","family":"Peng","sequence":"first","affiliation":[{"name":"College of Chemistry and Molecular Engineering Qingdao University of Science and Technology  Qingdao 266042 P. R. 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