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Undoubtedly, non\u2010corrosive AILs are indispensable for the industrialization of OSCs, but they hardly exhibit comparable performances to acid AILs, such as the classic PEDOT:PSS. Herein, we designed and synthesized two pH\u2010neutral conjugated polyelectrolytes (CPEs) with straight linear conformation as AILs for efficient and stable OSCs. Compared to the zigzag CPE, the linear IDT\u2010F exhibits a dominant face\u2010on orientation, which can form an intermolecular packing pathway that well coincides with the charge transport direction in OSCs. Consequently, the IDT\u2010F\u2010based AIL exhibits an exceptional hole\u2010transporting capability, even suppressing that of PEDOT:PSS. By utilizing the IDT\u2010F\u2010based AIL, an unprecedented PCE of 20.06% was achieved in the binary OSC, along with a fill factor of 82.2%. This not only represents the best performance reported to date for OSCs using a non\u2010corrosive AIL but also substantiates that a CPE\u2010based AIL can provide photovoltaic efficiencies exceeding 20%. Importantly, the IDT\u2010F\u2010based AIL can address the corrosion issues in OSCs due to the excellent chemical inertness, boosting a high device stability, so as to pave the way for practicable OSCs.<\/jats:p>","DOI":"10.1002\/smll.73311","type":"journal-article","created":{"date-parts":[[2026,4,6]],"date-time":"2026-04-06T14:04:37Z","timestamp":1775484277000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":1,"title":["Non\u2010Corrosive Conjugated Polyelectrolyte as Anode Interlayer for Efficient and Stable Organic Solar Cells: Over 20% Photovoltaic Efficiency and 82.2% Fill Factor"],"prefix":"10.1002","volume":"22","author":[{"given":"Yanhe","family":"Xiang","sequence":"first","affiliation":[{"name":"State Key Laboratory of Chemical Resource Engineering College of Materials Science and Engineering Beijing University of Chemical Technology  Beijing P. R. 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