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While incorporating a third component can effectively optimize active layer morphology and suppress non\u2011radiative recombination, the selection of such components currently lacks precise theoretical guidance. To address this challenge, we propose a new concept of electrostatic potential (ESP) site effect, which enables modulation of local ESP distribution by precisely adjusting terminal substituent positions without altering average molecular ESP, energy levels, or absorption. Guided by this concept, two asymmetric acceptors, ZY\u2010SCF\n                    <jats:sub>3<\/jats:sub>\n                    \u2010N2F and ZY\u2010SCF\n                    <jats:sub>3<\/jats:sub>\n                    \u2010B2F, were rationally designed and incorporated as the third component into the PM6\/BTP\u2010eC9 system. Combining theoretical and experimental results reveal that both acceptors possess large dipole moments that favor \u0394\n                    <jats:italic>E<\/jats:italic>\n                    <jats:sub>3<\/jats:sub>\n                    suppression. Notably, ZY\u2010SCF\n                    <jats:sub>3<\/jats:sub>\n                    \u2010B2F, featuring a larger ESP difference at terminal carbon atoms, induces more ordered molecular packing and favorable phase separation morphology in the ternary blend. This leads to synergistic enhancements in open\u2011circuit voltage, short\u2011circuit current density, and fill factor, ultimately delivering an outstanding efficiency of 20.53%. This work elucidates the critical role of local ESP distribution in determining material properties and provides a simple yet effective theoretical guideline for developing highly efficient ternary OSCs.\n                  <\/jats:p>","DOI":"10.1002\/anie.8983584","type":"journal-article","created":{"date-parts":[[2026,9,21]],"date-time":"2026-09-21T07:32:23Z","timestamp":1789975943000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Electrostatic Potential Site Effect of the Third Component Enables High\u2010Performance Organic Solar Cells with Low Energy Loss"],"prefix":"10.1002","author":[{"given":"Jiayi","family":"Cheng","sequence":"first","affiliation":[{"name":"Key Laboratory of Fluorine and Silicon for Energy Materials and Chemistry of Ministry of Education\/National Engineering Research Center for Carbohydrate Synthesis College of Chemistry and Materials Jiangxi Normal University  Nanchang 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Silicon for Energy Materials and Chemistry of Ministry of Education\/National Engineering Research Center for Carbohydrate Synthesis College of Chemistry and Materials Jiangxi Normal University  Nanchang China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinyang","family":"Yu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Modern Optical Instrumentation Department of Chemistry Zhejiang University  Hangzhou China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuang","family":"Fu","sequence":"additional","affiliation":[{"name":"Department of Physics Chinese University of Hong Kong  Kowloon Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Weilin","family":"Zhou","sequence":"additional","affiliation":[{"name":"School of Chemical Engineering and State Key Laboratory of Advanced Polymer Materials Sichuan University  Chengdu 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