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Current strategies mainly involve direct fluorination or trifluoromethylation, but high-performance NFAs still suffer from large exciton binding energy (Eb) and nonradiative energy loss (\u0394E3). Herein, we introduce a novel fluorinated group, trifluoromethylthio (SCF3), into the quinoxaline core of an A-DA\u2032D-A-type NFA, combined with alkyl side-chain engineering, to construct three new acceptors, ZY-SCF3-EH, ZY-SCF3-BO, and ZY-SCF3-HD. Theoretical calculations reveal that SCF3 possesses moderate electron-withdrawing ability, affording a favorable ESP to balance exciton dissociation and \u0394E3 suppression. Besides, SCF3-based acceptors exhibit smaller hole\u2013electron overlap, larger centroid distances, and lower Eb, which are beneficial for further suppressing energy loss. Experimentally, the high lipophilicity of SCF3 enhances solubility and solution processability, while multiple noncovalent interactions induce a three-dimensional honeycomb-like packing network that improves charge mobility. Consequently, the side-chain-optimized acceptor ZY-SCF3-HD delivers a superior power conversion efficiency (PCE) of 19.4%, with simultaneously improved open-circuit voltage (VOC), short-circuit current density (JSC), and fill factor (FF), alongside a low \u0394E3 of 0.23 eV. A ternary blend further boosts the efficiency to 20.1%. Notably, a 20.25 cm2 module fabricated at room temperature achieves an impressive efficiency of 16.4%, ranking among the highest values reported to date. This work illustrates SCF3 as an effective fluorinated unit for constructing high-performance NFAs, providing a new strategy to simultaneously achieve high VOC, JSC, FF, and low \u0394E3, and offering new design insights for next-generation high-efficiency OSCs.<\/jats:p>","DOI":"10.1021\/jacs.6c09915","type":"journal-article","created":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T18:02:52Z","timestamp":1785866572000},"page":"34703-34719","source":"Crossref","is-referenced-by-count":1,"title":["Trifluoromethylthio\nEngineering Enables a Balanced\nElectrostatic Potential for Organic Solar Cells with over 20% Efficiency\nand Low Energy Loss"],"prefix":"10.1021","volume":"148","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-6649-5865","authenticated-orcid":true,"given":"Xunfan","family":"Liao","sequence":"first","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Mingtao","family":"Liu","sequence":"additional","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zhongyuan","family":"Wu","sequence":"additional","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0009-0007-9138-4044","authenticated-orcid":true,"given":"Jingxuan","family":"Sun","sequence":"additional","affiliation":[{"name":"Shanghai Jiaotong University , , ,","place":["Shanghai, China, 200240"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haojia","family":"Ding","sequence":"additional","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Adiljan","family":"Wupur","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinyang","family":"Yu","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 310058"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuang","family":"Fu","sequence":"additional","affiliation":[{"name":"Chinese University of Hong Kong , , New Territories, Kowloon, ,","place":["Hong Kong, China, 999077"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Shuzhen","family":"Liao","sequence":"additional","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dan","family":"Liu","sequence":"additional","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Ming","family":"Zhang","sequence":"additional","affiliation":[{"name":"Shanghai Jiaotong University , , ,","place":["Shanghai, China, 200240"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peipei","family":"Zhu","sequence":"additional","affiliation":[{"name":"Jiangxi Normal University , , 99 Ziyang Avenue , ,","place":["Nanchang, China, 330022"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Qian","family":"Xie","sequence":"additional","affiliation":[{"name":"Jiangxi Academy of Sciences , , ,","place":["Nanchang, China, 330096"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-8640-8178","authenticated-orcid":true,"given":"Weifei","family":"Fu","sequence":"additional","affiliation":[{"name":"Zhejiang University-Hangzhou Global Scientific and Technological Innovation Center Hangzhou , , ,","place":["Hangzhou, China, 311200"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1908-3294","authenticated-orcid":true,"given":"Xinhui","family":"Lu","sequence":"additional","affiliation":[{"name":"Chinese University of Hong Kong , , New Territories, Kowloon, ,","place":["Hong Kong, China, 999077"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7747-9054","authenticated-orcid":true,"given":"Haiming","family":"Zhu","sequence":"additional","affiliation":[{"name":"Zhejiang University , , ,","place":["Hangzhou, China, 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