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However, in film, mechanism of aggregates\u2019 excited\u2010state non\u2010radiative recombination and how to suppress its rate (\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>nr<\/jats:sub>\n                    ) remain unclear. Here, taking classical Y6\u2010type acceptors as an example, we investigate how change in their molecular packing modes impacts aggregates\u2019 excited\u2010state properties and\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>nr<\/jats:sub>\n                    . We find that\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>nr<\/jats:sub>\n                    decreases with an increased population of the compact EECC (end\u2010end and core\u2010core) packing mode. Our results reveal that the EECC mode enhances the electronic coupling between intermolecular charge\u2010transfer (iCT) and locally excited (LE) exciton states, facilitating aggregates\u2019 excited\u2010state wavefunction delocalization and lowering the aggregates\u2019 exciton\u2010phonon coupling, which compensates for the energy\u2010gap\u2010law effect. This intermolecular excitonic\u2010coupling regulation strategy is further supported in the L8BO series through an increased population of the EE packing mode and enhanced LE\u2013LE excitonic coupling. The corresponding D18:L8BO:HDL8 ternary OPV devices achieved a high efficiency of 20.63% (certified as 20.40%) with reduced non\u2010radiative voltage loss (\u0394\n                    <jats:italic>V<\/jats:italic>\n                    <jats:sub>nr<\/jats:sub>\n                    ). Our work has not only uncovered the underlying mechanism of how molecular packing mode impacts aggregates\u2019 electronic structures and\n                    <jats:italic>k<\/jats:italic>\n                    <jats:sub>nr<\/jats:sub>\n                    , but also provided a molecule\u2010design strategy for improving NIR luminescent efficiencies\/exciton lifetimes of films and OPV device efficiencies with reduced \u0394\n                    <jats:italic>V<\/jats:italic>\n                    <jats:sub>nr<\/jats:sub>\n                    .\n                  <\/jats:p>","DOI":"10.1002\/adma.74699","type":"journal-article","created":{"date-parts":[[2026,8,18]],"date-time":"2026-08-18T07:36:56Z","timestamp":1787038616000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Directed Regulation of Intermolecular Excitonic Couplings to Minimize Non\u2010Radiative Recombination of Excited States in NIR\u2010Absorbing Non\u2010Fullerene Acceptors"],"prefix":"10.1002","volume":"38","author":[{"given":"Tianchen","family":"Lu","sequence":"first","affiliation":[{"name":"State Key Laboratory of Silicon Materials Department of Polymer Science and Engineering Zhejiang University  Hangzhou P. R. China"},{"name":"Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xin","family":"Zong","sequence":"additional","affiliation":[{"name":"Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yiming","family":"Wang","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Silicon Materials Department of Polymer Science and Engineering Zhejiang University  Hangzhou P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jinyang","family":"Yu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Silicon Materials Department of Polymer Science and Engineering Zhejiang University  Hangzhou P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dinglong","family":"Feng","sequence":"additional","affiliation":[{"name":"Department of Physics The Chinese University of Hong Kong  Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yibo","family":"Kong","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Silicon Materials Department of Polymer Science and Engineering Zhejiang University  Hangzhou P. R. China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Xinxin","family":"Xia","sequence":"additional","affiliation":[{"name":"Institute of Functional Nano &amp; Soft Materials (FUNSOM) Soochow University  Suzhou Jiangsu P. R. China"},{"name":"School of Chemistry &amp; Chemical Engineering Shandong University  Jinan Shandong P. R. 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China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yuxuan","family":"Zhu","sequence":"additional","affiliation":[{"name":"State Key Laboratory For Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-3100-1570","authenticated-orcid":false,"given":"Zaifei","family":"Ma","sequence":"additional","affiliation":[{"name":"State Key Laboratory For Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University  Shanghai China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1908-3294","authenticated-orcid":false,"given":"Xinhui","family":"Lu","sequence":"additional","affiliation":[{"name":"Department of Physics The Chinese University of Hong Kong  Hong Kong China"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-7747-9054","authenticated-orcid":false,"given":"Haiming","family":"Zhu","sequence":"additional","affiliation":[{"name":"State Key Laboratory of Extreme Photonics and Instrumentation Department of Chemistry Zhejiang University  Hangzhou Zhejiang P. 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