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Rapid Commun."],"published-print":{"date-parts":[[2024,9]]},"abstract":"<jats:title>Abstract<\/jats:title><jats:p>The advent of nonfullerene acceptors (NFAs) has greatly improved the photovoltaic performance of organic solar cells (OSCs). However, to compete with other solar cell technologies, there is a pressing need for accelerated research and development of improved NFAs as well as their compatible wide bandgap polymer donors. In this study, a novel electron\u2010withdrawing building block, succinimide\u2010substituted thiophene (TS), is utilized for the first time to synthesize three wide bandgap polymer donors: <jats:bold>PBDT\u2010TS\u2010C5<\/jats:bold>, <jats:bold>PBDT\u2010TSBT\u2010C12<\/jats:bold>, and <jats:bold>PBDTF\u2010TSBT\u2010C16<\/jats:bold>. These polymers exhibit complementary bandgaps for efficient sunlight harvesting and suitable frontier energy levels for exciton dissociation when paired with the extensively studied NFA, Y6. Among these donors, <jats:bold>PBDTF\u2010TSBT\u2010C16<\/jats:bold> demonstrates the highest hole mobility and a relatively low highest occupied molecular orbital (HOMO) energy level, attributed to the incorporation of thiophene spacers and electron\u2010withdrawing fluorine substituents. OSC devices based on the blend of <jats:bold>PBDTF\u2010TSBT\u2010C16<\/jats:bold>:Y6 achieve the highest power conversion efficiency\u00a0of 13.21%, with a short circuit current density (<jats:italic>J<\/jats:italic><jats:sub>sc<\/jats:sub>) of 26.83\u00a0mA cm<jats:sup>\u22122<\/jats:sup>, an open circuit voltage (<jats:italic>V<\/jats:italic><jats:sub>oc<\/jats:sub>) of 0.80\u00a0V, and a fill factor\u00a0of 0.62. Notably, the <jats:italic>V<\/jats:italic><jats:sub>oc<\/jats:sub> \u00d7 <jats:italic>J<\/jats:italic><jats:sub>sc<\/jats:sub> product reaches 21.46\u00a0mW cm<jats:sup>\u22122<\/jats:sup>, demonstrating the potential of TS as an electron acceptor building block for the development of high\u2010performance wide bandgap polymer donors in OSCs.<\/jats:p>","DOI":"10.1002\/marc.202400275","type":"journal-article","created":{"date-parts":[[2024,6,3]],"date-time":"2024-06-03T18:58:40Z","timestamp":1717441120000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Wide Bandgap Polymer Donors Based on Succinimide\u2010Substituted Thiophene for Nonfullerene Organic Solar Cells"],"prefix":"10.1002","volume":"45","author":[{"given":"Yi","family":"Yuan","sequence":"first","affiliation":[{"name":"Department of Chemical Engineering and Waterloo Institute for Nanotechnology (WIN) University of Waterloo  200 University Ave West 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