Issue 20, 2024

High-mobility organic mixed conductors with a low synthetic complexity index via direct arylation polymerization

Abstract

Through direct arylation polymerization, a series of mixed ion-electron conducting polymers with a low synthetic complexity index is synthesized. A thieno[3,2-b]thiophene monomer with oligoether side chains is used in direct arylation polymerization together with a wide range of aryl bromides with varying electronic character from electron-donating thiophene to electron-accepting benzothiadiazole. The obtained polymers are less synthetically complex than other mixed ion–electron conducting polymers due to higher yield, fewer synthetic steps and less toxic reagents. Organic electrochemical transistors (OECTs) based on a newly synthesized copolymer comprising thieno[3,2-b]thiophene with oligoether side chains and bithiophene exhibit excellent device performance. A high charge-carrier mobility of up to μ = 1.8 cm2 V−1 s−1 was observed, obtained by dividing the figure of merit [μC*] from OECT measurements by the volumetric capacitance C* from electrochemical impedance spectroscopy, which reached a value of more than 215 F cm−3.

Graphical abstract: High-mobility organic mixed conductors with a low synthetic complexity index via direct arylation polymerization

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Article information

Article type
Edge Article
Submitted
29 Feb 2024
Accepted
18 Apr 2024
First published
19 Apr 2024
This article is Open Access

All publication charges for this article have been paid for by the Royal Society of Chemistry
Creative Commons BY license

Chem. Sci., 2024,15, 7679-7688

High-mobility organic mixed conductors with a low synthetic complexity index via direct arylation polymerization

J. Kimpel, Y. Kim, J. Asatryan, J. Martín, R. Kroon and C. Müller, Chem. Sci., 2024, 15, 7679 DOI: 10.1039/D4SC01430H

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

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