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Herein, we applied the typical approach for Im structures by using o\u2010benzoquinone and aldehyde in the presence of ammonium acetate yielding the target NFAs effectively, and three new Im\u2010based acceptors were obtained by adjusting the hanging groups with benzene, 4\u2010fluorobenzene and 3.5\u2010difluorobenzene. These NFAs displayed tunable molecular dipole moments, UV\u2013vis absorption, and frontier energy levels. When used as the guest acceptor in the PM6:BTP\u2010eC9 based organic solar cells, the fluorinated NFAs can effectively improve the device efficiency to 19.48%, which is significantly higher than 18.42% of the binary control and also among top efficiencies for cells using Im\u2010based NFAs. This work provides an effective protocol for Im\u2010based NFAs with tunable molecular scaffolds and properties, which can be of great potential for optoelectronics.<\/jats:p>","DOI":"10.1002\/marc.70368","type":"journal-article","created":{"date-parts":[[2026,8,7]],"date-time":"2026-08-07T02:54:36Z","timestamp":1786071276000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Benzimidazole\u2010Fused A\u2010D\u2010A\u2019\u2010D\u2010A Type Non\u2010Fullerene Acceptors for Efficient Organic Solar Cells"],"prefix":"10.1002","volume":"47","author":[{"given":"Ting","family":"Li","sequence":"first","affiliation":[{"name":"College of Environment and Chemical Engineering Nanchang Hangkong University  Nanchang People's Republic of China"},{"name":"Institute of Energy Research Jiangxi Academy of Sciences  Nanchang People's Republic of 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