{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,10,19]],"date-time":"2026-10-19T15:24:04Z","timestamp":1792423444163,"version":"4.5.0"},"reference-count":42,"publisher":"Wiley","issue":"45","license":[{"start":{"date-parts":[[2025,9,18]],"date-time":"2025-09-18T00:00:00Z","timestamp":1758153600000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"funder":[{"DOI":"10.13039\/501100001809","name":"National Natural Science Foundation of China","doi-asserted-by":"publisher","award":["22475164;22222905"],"award-info":[{"award-number":["22475164;22222905"]}],"id":[{"id":"10.13039\/501100001809","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2025,11]]},"abstract":"<jats:title>Abstract<\/jats:title>\n                  <jats:p>\n                    The photo\u2010charge generation\u00a0from localized Frenkel excitons (EXs) reduces the theoretical power conversion efficiency (PCE) of organic solar cells (OSCs) below Shockley\u2010Queisser limit as extra energy is required for EX splitting at heterojunctions. Though developing the intrinsic photo\u2010charge pathway based on intermolecular charge transfer (ICT) excitons is expected to break the efficiency bottleneck, its current contribution to charge photogeneration is negligible due to the difficulties in spontaneous ICT dissociation. To amplify the intrinsic photo\u2010charge utilization, a concept of bulk homojunction (BHOJ) within non\u2010fullerene acceptors (NFAs) is proposed. Under this structure, the EX converts to ICT in NFA grains, whereas the anisotropic molecular orientation at grain boundaries drives ICT splitting. To fulfill the morphological requirements, a co\u2010solvent strategy is taken: a good main solvent, chloroform, guarantees the NFA's crystallinity, and a poor auxiliary solvent, acetone, helps the anisotropic grain formation. Taking advantage of the BHOJ, a fivefold growth of short\u2010circuit current density (\n                    <jats:italic>J<\/jats:italic>\n                    <jats:sub>SC<\/jats:sub>\n                    ) is observed in Y6\u2010only OSCs. More importantly, its compatibility with cost\u2010effective printing, fabrication, and semi\u2010transparent devices is also confirmed in model devices, even with the existence of bulk heterojunction (BHJ) structure. This work highlights the BHOJ as a general morphological pursuit for future OSCs\u2019 improvements.\n                  <\/jats:p>","DOI":"10.1002\/smll.202507273","type":"journal-article","created":{"date-parts":[[2025,9,18]],"date-time":"2025-09-18T11:11:32Z","timestamp":1758193892000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Constructing Bulk Homojunction for Intrinsic Photo\u2010Charge Utilization in Organic Solar Cells"],"prefix":"10.1002","volume":"21","author":[{"given":"Yuhao","family":"Xie","sequence":"first","affiliation":[{"name":"State Key Laboratory for Mechanical Behavior of Materials School of Materials Science and Engineering Xi'an Jiaotong University  Xi'an 710049 P. R. 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