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Rapid Commun"],"published-print":{"date-parts":[[2013,10]]},"abstract":"<jats:p>A fused ladder indacenodithiophene (IDT)\u2010based donor\u2013acceptor (D\u2013A)\u2010type alternating conjugated polymer, PIDTHT\u2010BT, presenting <jats:italic>n<\/jats:italic>\u2010hexylthiophene conjugated side chains is prepared. By extending the degree of intramolecular repulsion through the conjugated side chain moieties, an energy level for the highest occupied molecular orbital (HOMO) of \u20135.46 eV \u2013 a value approximately 0.27 eV lower than that of its counterpart PIDTDT\u2010BT \u2013 is obtained, subsequently providing a fabricated solar cell with a high open\u2010circuit voltage of approximately 0.947 V. The hole mobility (determined using the space charge\u2010limited current model) in a blend film containing 20 wt% PIDTHT\u2010BT<jats:italic>)<\/jats:italic> and 80 wt% [6,6]\u2010phenyl\u2010C<jats:sub>71<\/jats:sub> butyric acid methyl ester (PC<jats:sub>71<\/jats:sub>BM) is 2.2 \u00d7 10<jats:sup>\u20139<\/jats:sup> m<jats:sup>2<\/jats:sup> V<jats:sup>\u20131<\/jats:sup> s<jats:sup>\u20131<\/jats:sup>, which is within the range of reasonable values for applications in organic photovoltaics. The power conversion efficiency is 4.5% under simulated solar illumination (AM 1.5G, 100 mW cm<jats:sup>\u20132<\/jats:sup>).\n<jats:boxed-text content-type=\"graphic\" position=\"anchor\"><jats:graphic xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\" mimetype=\"image\/jpg\" position=\"anchor\" specific-use=\"enlarged-web-image\" xlink:href=\"graphic\/marc201300569-abs-0001-m.jpg\"><jats:alt-text>image<\/jats:alt-text><\/jats:graphic><\/jats:boxed-text><\/jats:p>","DOI":"10.1002\/marc.201300569","type":"journal-article","created":{"date-parts":[[2013,9,11]],"date-time":"2013-09-11T12:19:50Z","timestamp":1378901990000},"page":"1623-1628","source":"Crossref","is-referenced-by-count":31,"title":["Increasing the Open\u2010Circuit Voltage in High\u2010Performance Organic Photovoltaic Devices through Conformational Twisting of an Indacenodithiophene\u2010Based Conjugated 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