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Improved charge transport in fused-ring bridged hemi-isoindigo-based small molecules by incorporating a thiophene unit for solution-processed organic field-effect transistors

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Abstract

Two acceptor–donor–acceptor small molecules based on a fused ring indacenodithieno[3,2-b]thiophene (IDTT) as a donor, and hemi-isoindigo units, methyleneoxindole (IDTT-MI) and thienylmethyleneoxindole (IDTT-T-MI) as acceptors were synthesized and characterized for application in solution-processed organic field-effect transistors. The incorporation of a thiophene bridge which extended the conjugation of the backbone maintained highly co-planar structures, and also endowed the small molecule with ordered crystalline structures and interconnected morphology. Consequently, IDTT-T-MI-based organic field-effect transistors exhibited a highest hole mobility of 0.80 cm2 V−1 s−1, which was the highest mobility for solution-processed hemi-isoindigo-based organic semiconductor materials.

Graphical abstract: Improved charge transport in fused-ring bridged hemi-isoindigo-based small molecules by incorporating a thiophene unit for solution-processed organic field-effect transistors

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Article information


Submitted
30 Sep 2019
Accepted
22 Nov 2019
First published
26 Nov 2019

J. Mater. Chem. C, 2020, Advance Article
Article type
Paper

Improved charge transport in fused-ring bridged hemi-isoindigo-based small molecules by incorporating a thiophene unit for solution-processed organic field-effect transistors

G. Zhang, R. Chen, Y. Sun, B. Kang, M. Sun, H. Lu, L. Qiu, K. Cho and Y. Ding, J. Mater. Chem. C, 2020, Advance Article , DOI: 10.1039/C9TC05374C

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