Issue 30, 2021

Regioregular, yet ductile and amorphous indacenodithiophene-based polymers with high-mobility for stretchable plastic transistors

Abstract

In the past decade, various high-performing π-conjugated polymers based on axisymmetric cyclopentadithiophene (CDT) and centrosymmetric indacenodithiophene (IDT) units have been thoroughly studied for use in organic field-effect transistors. However, no comparative set of data between CDT- and IDT-based polymers is available with a focus on relevant change in optoelectronic and morphological properties. Herein, we report the synthesis and characterization of four regioregular, well-defined donor–acceptor polymers (P1–P4), comprising different compositions of CDT and IDT donors in conjugation with the asymmetric 5-fluoro-2,1,3-benzothiadiazole acceptor that is precisely oriented in the regular pattern along the backbone. Morphological analyses of the above polymer series show that exclusive CDT donor-containing P1 is semicrystalline, whereas the others (IDT donor-containing ones) are near-amorphous in nature. Comparatively, IDT donor-containing polymers have superior hole mobilities; in particular, exclusive IDT donor-containing polymer P4 offers a high mobility of 1.67 cm2 V−1 s−1. In addition, the near-amorphous characteristics render the IDT donor-containing polymer films highly ductile and stretchable. Such superior features, which are associated with excellent charge transport and ductility, demonstrate a promising possibility for application in viable stretchable electronics.

Graphical abstract: Regioregular, yet ductile and amorphous indacenodithiophene-based polymers with high-mobility for stretchable plastic transistors

Supplementary files

Article information

Article type
Paper
Submitted
29 apr 2021
Accepted
08 iyl 2021
First published
09 iyl 2021

J. Mater. Chem. C, 2021,9, 9670-9682

Regioregular, yet ductile and amorphous indacenodithiophene-based polymers with high-mobility for stretchable plastic transistors

Y. Cho, S. Park, S. Jeong, H. Yang, B. Lee, S. M. Lee, B. H. Lee and C. Yang, J. Mater. Chem. C, 2021, 9, 9670 DOI: 10.1039/D1TC01984H

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