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Macromol Rapid Commun. 2018 Jul;39(14):e1700820. doi: 10.1002/marc.201700820. Epub 2018 Mar 5.

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

Author information

1
KSC, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
2
Imaging and Characterization Core Lab, King Abdullah University of Science and Technology (KAUST), Thuwal, 23955-6900, Saudi Arabia.
3
Department of Chemistry and Centre for Plastic Electronics, Imperial College London, SW7 2AZ, United Kingdom.
4
Key Laboratory for Polymeric Composite and Functional Materials of Ministry of Education, School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou, 510275, China.

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.

KEYWORDS:

EELS mapping; conjugated polymers; solar cells; thieno-benzothiophene isoindigo

PMID:
29504170
DOI:
10.1002/marc.201700820
[Indexed for MEDLINE]

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