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Although interfacial energetic disorder intrinsically broadens the density of states (DOS), establishing macroscopic relationships between charge\u2010transfer (CT) energetics and device performance is essential for rational material design. Here, we propose a unified scaling framework across a broad library of wide\u2010bandgap OPVs using an effective emissive CT energy to represent the characteristic energy of the emissive CT manifold within the broadened DOS. We demonstrate that the free\u2010carrier energy (\n                    <jats:italic>E<\/jats:italic>\n                    <jats:sub>CS<\/jats:sub>\n                    ) provides a robust thermodynamic boundary for sustaining photocurrent under near\u2010threshold conditions, highlighting the importance of free\u2010carrier energetics in near\u2010threshold operation. Importantly, the robustness of this macroscopic scaling is supported by the strong correspondence and internal consistency between independently evaluated CT energetics and radiative voltage\u2010loss analysis. Within this framework, donor molecular rigidity is associated with reduced CT relaxation\/broadening and effective CT exciton binding energies below 0.1\u00a0eV, thereby enabling efficient photocurrent generation near minimal energetic offsets. This scaling framework provides a practical guideline for navigating voltage\u2010loss trade\u2010offs and approaching low\u2010voltage\u2010loss operation near the thermodynamic limit.\n                  <\/jats:p>","DOI":"10.1002\/adma.75304","type":"journal-article","created":{"date-parts":[[2026,10,8]],"date-time":"2026-10-08T06:22:09Z","timestamp":1791440529000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["A Unified Thermodynamic Framework for Photocurrent Generation and Voltage Losses in Organic Photovoltaics"],"prefix":"10.1002","author":[{"ORCID":"https:\/\/orcid.org\/0000-0001-5531-6510","authenticated-orcid":false,"given":"Hirohiko","family":"Fukagawa","sequence":"first","affiliation":[{"name":"Center for Frontier Science Chiba University  Chiba Japan"},{"name":"Molecular Chirality Research Center Chiba University  Chiba Japan"},{"name":"Graduate School of Science and Engineering Chiba University  Chiba Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0859-8185","authenticated-orcid":false,"given":"Taku","family":"Oono","sequence":"additional","affiliation":[{"name":"Science &amp; Technology Research Laboratories Japan Broadcasting Corporation (NHK)  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Yusuke","family":"Aoki","sequence":"additional","affiliation":[{"name":"Department of Applied Physics Tokyo University of Science  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Tsubasa","family":"Sasaki","sequence":"additional","affiliation":[{"name":"Science &amp; Technology Research Laboratories Japan Broadcasting Corporation (NHK)  Tokyo Japan"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Haruto","family":"Shoji","sequence":"additional","affiliation":[{"name":"Department of Applied Physics Tokyo University of Science  Tokyo 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