Dual-acceptor Conjugated Polymers Based on Cyano-substituted Benzoselenadiazole for n-Type Organic Thermoelectrics

Hui-Miao Li; Yue-Xin Gao; Jing-Wei Jiang; Yun-Feng Deng; Yan-Hou Geng

doi:10.1007/s10118-026-3859-3

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Dual-acceptor Conjugated Polymers Based on Cyano-substituted Benzoselenadiazole for n-Type Organic Thermoelectrics

RESEARCH ARTICLE | Updated：2026-10-21

- Dual-acceptor Conjugated Polymers Based on Cyano-substituted Benzoselenadiazole for n-Type Organic Thermoelectrics
- Chinese Journal of Polymer Science Vol. 44, Pages: 1-11(2026)
- Affiliations：
  
  School of Materials Science and Engineering, State Key Laboratory of Advanced Materials for Intelligent Sensing, Tianjin Key Laboratory of Molecular Optoelectronic Science and Key Laboratory of Organic Integrated Circuits, Ministry of Education, Collaborative Innovation Center of Chemical Science and Engineering (Tianjin), Tianjin University, Tianjin 300072, China
- Author bio：
  
  yunfeng.deng@tju.edu.cn
- Funds：
- DOI：10.1007/s10118-026-3859-3
  CLC：
- Received：26 June 2026，
  
  Accepted：24 August 2026，
  
  Online First：21 October 2026，
  
  Published：2026-09
- Accepted：
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Li, H. M.; Gao, Y. X.; Jiang, J. W.; Deng, Y. F.; Geng, Y. H. Dual-acceptor conjugated polymers based on cyano-substituted benzoselenadiazole for n-type organic thermoelectrics. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3859-3

Hui-Miao Li, Yue-Xin Gao, Jing-Wei Jiang, et al. Dual-acceptor Conjugated Polymers Based on Cyano-substituted Benzoselenadiazole for n-Type Organic Thermoelectrics[J/OL]. Chinese Journal of Polymer Science, 2026, 441-11.
Li, H. M.; Gao, Y. X.; Jiang, J. W.; Deng, Y. F.; Geng, Y. H. Dual-acceptor conjugated polymers based on cyano-substituted benzoselenadiazole for n-type organic thermoelectrics. Chinese J. Polym. Sci. https://doi.org/10.1007/s10118-026-3859-3 DOI：

Hui-Miao Li, Yue-Xin Gao, Jing-Wei Jiang, et al. Dual-acceptor Conjugated Polymers Based on Cyano-substituted Benzoselenadiazole for n-Type Organic Thermoelectrics[J/OL]. Chinese Journal of Polymer Science, 2026, 441-11. DOI： 10.1007/s10118-026-3859-3.

摘要

Abstract

The advancement of organic electronics relies critically on the development of n-type

-conjugated polymers. Herein

we report two cyano-functionalized benzoselenadiazole (CNBSz)-based conjugated polymers

Th-CNBSz and Se-CNBSz

incorporating diketopyrrolopyrrole (DPP) unit flanked by thiophene or selenophene moieties. The introduction of electron-deficient cyano substituents and a dual-acceptor backbone enables deep LUMO energy levels of down to −4.24 eV

allowing electron injection and n-doping. Meanwhile

the dual-acceptor framework promotes polaron delocalization along the polymer backbone. Density functional theory calculations reveal that selenophene substitution enhances backbone planarity

via

multiple synergistic intramolecular noncovalent interactions

whereas thiophene substitution imparts greater conformational flexibility

which facilitates backbone planarization in the solid state and improves molecular packing. As a result

despite its less planar backbone

Th-CNBSz exhibits superior electron mobility (0.26 c

·V

−1

·s

−1

) and consequently delivers a high electrical conductivity of 19.2 S·cm

−1

and a power factor of 27.6 μW·m

−1

·K

−2

upon n-doping.

关键词

Keywords

references

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