Issue 35, 2023

Dithiene-fused quinoxalineimide-based all-acceptor polymers for n-type organic semiconductors

Abstract

Introduction of strong electron-deficient building blocks into the polymer backbone is an efficient strategy to design n-type organic semiconductors. In this work, a strong electron-deficient building block, dithiene-fused quinoxalineimide (DTQI), containing electron-withdrawing quinoxaline and imide units, was synthesized and incorporated into a polymer backbone. The frontier molecular orbital (FMO) energy levels downshifted with the incorporation of the quinoxalineimide (QI) unit onto the framework. Owing to the high electron-affinity of DTQI, the DTQI-based acceptor–acceptor (all-acceptor, A–A) type polymer P(DTQI-BTI) showed deep-lying highest occupied molecular orbital (HOMO) and lowest unoccupied molecular orbital (LUMO) energy levels, thus yielding unipolar n-type transport character with electron mobility of 0.25 cm2 V−1 s−1 in organic thin-film transistors. These results demonstrate that DTQI is a promising building block for constructing n-type polymer semiconductors and can be extended to the design of other novel electron-deficient building blocks.

Graphical abstract: Dithiene-fused quinoxalineimide-based all-acceptor polymers for n-type organic semiconductors

Supplementary files

Article information

Article type
Paper
Submitted
27 iyn 2023
Accepted
05 iyl 2023
First published
18 avq 2023

J. Mater. Chem. C, 2023,11, 11905-11911

Dithiene-fused quinoxalineimide-based all-acceptor polymers for n-type organic semiconductors

L. Tu, H. Wang, X. Li, X. Wang, M. Li, Y. Wang and Y. Shi, J. Mater. Chem. C, 2023, 11, 11905 DOI: 10.1039/D3TC02243A

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