{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,22]],"date-time":"2026-09-22T16:02:31Z","timestamp":1790092951553,"version":"4.0.1"},"reference-count":50,"publisher":"Wiley","issue":"29","license":[{"start":{"date-parts":[[2025,5,24]],"date-time":"2025-05-24T00:00:00Z","timestamp":1748044800000},"content-version":"vor","delay-in-days":0,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["Small"],"published-print":{"date-parts":[[2025,7]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>Developing ultra\u2010narrow bandgap electron acceptors is an effective approach to achieving transparent organic photovoltaics (TOPVs). In this study, two phenazine based non\u2010fullerene acceptors, namely PA\u20102H and PA\u20102Br, are synthesized by merging core bromination and extended conjugation. Applying extra ethylene double bonds as \u03c0 bridge makes the absorption onsets of films red shift to 1021 and 1041\u00a0nm for PA\u20102H and PA\u20102Br, respectively. Single\u2010crystal data illustrated that PA\u20102Br exhibits a tight and ordered 3D network packing with improved charge transport, different from the 2D step\u2010like packing of PA\u20102H. Therefore, PA\u20102Br\u2010based opaque organic photovoltaics\u00a0achieves an excellent power conversion efficiency (PCE) of 13.7%. Notably, the TOPV attains a PCE of 4.60% with an average visible transmittance (AVT) of 70.2%, which exhibits promise in efficient TOPVs. This work demonstrates the importance of core bromination in the design of high\u2010performance ultra\u2010narrow bandgap electron acceptors and provides the opportunity to fabricate efficient TOPVs.<\/jats:p>","DOI":"10.1002\/smll.202500536","type":"journal-article","created":{"date-parts":[[2025,5,24]],"date-time":"2025-05-24T15:15:39Z","timestamp":1748099739000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Phenazine\u2010Based Ultra\u2010Narrow Bandgap Acceptors for Efficient Transparent Organic Photovoltaic"],"prefix":"10.1002","volume":"21","author":[{"given":"Yibin","family":"Zhou","sequence":"first","affiliation":[{"name":"Zhejiang Key Laboratory of 3D Micro\/Nano Fabrication and Characterization Research Center for Industries of the Future School of Engineering Westlake University  Hangzhou Zhejiang 310030 China"},{"name":"Institute of Advanced Technology Westlake Institute for Advanced Study  Hangzhou 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