Dithienosilolothiophene: A New Polyfused Donor for Organic Electronics

Bob C. Schroeder, Mindaugas Kirkus, Christian B. Nielsen, Raja Shahid Ashraf, Iain McCulloch

Research output: Contribution to journalArticlepeer-review

2 Scopus citations

Abstract

We report the synthesis of a novel pentacyclic donor moiety, dithienosilolothiophene, and its incorporation into low bandgap semiconducting polymers. The unique geometry of this new donor allowed attaching four solubilizing side chains on the same side of the fused ring system, thus ensuring sufficient solubility when incorporated into conjugated polymers while simultaneously reducing the steric hindrance between adjacent polymer chains. The optoelectronic properties of three new polymers comprising the novel pentacyclic donor were investigated and compared to structurally similar thieno[3,2-b]thienobis(silolothiophene) polymers. Organic solar cells were fabricated in order to evaluate the new materials’ potential as donor polymers in bulk heterojunction solar cells and gain further insight into how the single-sided side-chain arrangement affects the active layer blend morphology.
Original languageEnglish (US)
Pages (from-to)5557-5562
Number of pages6
JournalMacromolecules
Volume48
Issue number16
DOIs
StatePublished - Aug 13 2015

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