An experimental and computational study of donor–linker–acceptor block copolymers for organic photovoltaics

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dc.citation.firstpage1135en_US
dc.citation.issueNumber16en_US
dc.citation.journalTitleJournal of Polymer Science Part B: Polymer Physicsen_US
dc.citation.lastpage1143en_US
dc.citation.volumeNumber56en_US
dc.contributor.authorHu, Zhiqien_US
dc.contributor.authorJakowski, Jaceken_US
dc.contributor.authorZheng, Chenyuen_US
dc.contributor.authorCollison, Christopher J.en_US
dc.contributor.authorStrzalka, Josephen_US
dc.contributor.authorSumpter, Bobby G.en_US
dc.contributor.authorVerduzco, Rafaelen_US
dc.date.accessioned2018-10-31T18:20:48Zen_US
dc.date.available2018-10-31T18:20:48Zen_US
dc.date.issued2018en_US
dc.description.abstractBlock copolymers with donor and acceptor conjugated polymer blocks provide an approach to dictating the donor–accepter interfacial structure and understanding its relationship to charge separation and photovoltaic performance. We report the preparation of a series of donor‐linker‐acceptor block copolymers with poly(3‐hexylthiophene) (P3HT) donor blocks, poly((9,9‐dioctylfluorene)‐2,7‐diyl‐alt‐[4,7‐bis(thiophen‐5‐yl)‐2,1,3‐benzothiadiazole]‐2′,2″‐diyl) (PFTBT) acceptor blocks, and varying lengths of oligo‐ethylene glycol (OEG) chains as the linkers. Morphological analysis shows that the linkers increase polymer crystallinity while a combination of optical and photovoltaic measurements shows that the insertion of a flexible spacer reduces fluorescence quenching and photovoltaic efficiencies of solution processed photovoltaic devices. Density functional theory (DFT) simulations indicate that the linking groups reduce both charge separation and recombination rates, and block copolymers with flexible linkers will likely rotate to assume a nonplanar orientation, resulting in a significant loss of overlap at the donor–linker–acceptor interface. This work provides a systematic study of the role of linker length on the photovoltaic performance of donor–linker–acceptor block copolymers and indicates that linkers should be designed to control both the electronic properties and relative orientations of conjugated polymers at the interface. en_US
dc.identifier.citationHu, Zhiqi, Jakowski, Jacek, Zheng, Chenyu, et al.. "An experimental and computational study of donor–linker–acceptor block copolymers for organic photovoltaics." <i>Journal of Polymer Science Part B: Polymer Physics,</i> 56, no. 16 (2018) Wiley: 1135-1143. https://doi.org/10.1002/polb.24633.en_US
dc.identifier.doihttps://doi.org/10.1002/polb.24633en_US
dc.identifier.urihttps://hdl.handle.net/1911/103248en_US
dc.language.isoengen_US
dc.publisherWileyen_US
dc.rightsThis is an author's peer-reviewed final manuscript, as accepted by the publisher. The published article is copyrighted by Wiley.en_US
dc.titleAn experimental and computational study of donor–linker–acceptor block copolymers for organic photovoltaicsen_US
dc.typeJournal articleen_US
dc.type.dcmiTexten_US
dc.type.publicationpost-printen_US
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