Alternative Thieno[3,2-b][1]benzothiophene Isoindigo Polymers for Solar Cell Applications

Marios Neophytou, Daniel Bryant, Sergei Lopatin, Hu Chen, Rawad Hallani, Lewis Cater, Iain McCulloch, Wan Yue

Research output: Contribution to journalArticlepeer-review

5 Scopus citations

Abstract

This work reports the synthesis, characterization, photophysical, and photovoltaic properties of five new thieno[3,2-b][1]benzothiophene isoindigo (TBTI)-containing low bandgap donor-acceptor conjugated polymers with a series of comonomers and different side chains. When TBTI is combined with different electron-rich moieties, even small structural variations can have significant impact on thin film morphology of the polymer:phenyl C70 butyric acid methyl ester (PCBM) blends. More importantly, high-resolution electron energy loss spectroscopy is used to investigate the phase-separated bulk heterojunction domains, which can be accurately and precisely resolved, enabling an enhanced correlation between polymer chemical structure, photovoltaic device performance, and morphology.
Original languageEnglish (US)
Pages (from-to)1700820
JournalMacromolecular Rapid Communications
Volume39
Issue number14
DOIs
StatePublished - Mar 5 2018

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