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However, the coupled interfacial degradation mechanism in NiO\n                    <jats:sub>x<\/jats:sub>\n                    \/SAM\/perovskite systems remains ambiguous, which still restricts device stability. In this study, we identify a previously unrecognized proton\u2010coupled electron transfer (PCET) induced buried\u2010interface degradation pathway, in which the protons released from SAM accelerates the redox reaction between NiO\n                    <jats:sub>x<\/jats:sub>\n                    and I\n                    <jats:sup>\u2212<\/jats:sup>\n                    , especially under high\u2010temperature and UV\u2010irradiation operation conditions. To block this coupled degradation pathway, we incorporate 1\u2010methylimidazole into the SAM, which suppresses the proton transfer through capturing the protons and impedes the electron transfer through reducing the formation of I\n                    <jats:sup>\u2212<\/jats:sup>\n                    vacancies, thereby blocking the interfacial PCET process from both perspective of proton and electron. Besides, the proton\u2010capture treatment by 1\u2010methylimidazole can enhance the anchoring of SAM at the NiO\n                    <jats:sub>x<\/jats:sub>\n                    substrate, which promotes the interface hole transfer and also contributes to the interfacial stability. Consequently, the resulting PSCs, fabricated in ambient air, achieved a power conversion efficiency exceeding 26.3% with an enhanced operational stability by retaining &gt;90% initial efficiency after 2000 h of maximum power point tracking at \u223c50\u00b0C.\n                  <\/jats:p>","DOI":"10.1002\/anie.2426576","type":"journal-article","created":{"date-parts":[[2026,10,7]],"date-time":"2026-10-07T04:47:19Z","timestamp":1791348439000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Blocked Proton\u2010Coupled Electron Transfer Stabilizes Buried Interface in Air\u2010Processed Inverted Perovskite Solar Cells"],"prefix":"10.1002","author":[{"given":"Luyao","family":"Yan","sequence":"first","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhineng","family":"Lan","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yingying","family":"Yang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5869-4493","authenticated-orcid":false,"given":"Peng","family":"Cui","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Fu","family":"Yang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuxian","family":"Du","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shujie","family":"Qu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0000-7892-8384","authenticated-orcid":false,"given":"Hao","family":"Huang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0731-741X","authenticated-orcid":false,"given":"Meicheng","family":"Li","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Alternate Electrical Power System With Renewable Energy Sources, School of New Energy North China Electric Power University  Beijing China"},{"name":"College of Automotive and Energy Engineering Tongji University  Shanghai 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