Multi-Selenophene Incorporated Thiazole Imide-Based n-Type Polymers for High-Performance Organic Thermoelectrics

Yongchun Li, Wenchang Wu, Yimei Wang, Enmin Huang, Sang Young Jeong, Han Young Woo, Xugang Guo, Kui Feng

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

Developing polymers with high electrical conductivity (σ) after n-doping is a great challenge for the advance of the field of organic thermoelectrics (OTEs). Herein, we report a series of thiazole imide-based n-type polymers by gradually increasing selenophene content in polymeric backbone. Thanks to the strong intramolecular noncovalent N⋅⋅⋅S interaction and enhanced intermolecular Se⋅⋅⋅Se interaction, with the increase of selenophene content, the polymers show gradually lowered LUMOs, more planar backbone, and improved film crystallinity versus the selenophene-free analogue. Consequently, polymer PDTzSI−Se with the highest selenophene content achieves a champion σ of 164.0 S cm−1 and a power factor of 49.0 μW m−1 K−2 in the series when applied in OTEs after n-doping. The σ value is the highest one for n-type donor-acceptor OTE materials reported to date. Our work indicates that selenophene substitution is a powerful strategy for developing high-performance n-type OTE materials and selenophene incorporated thiazole imides offer an excellent platform in enabling n-type polymers with high backbone coplanarity, deep-lying LUMO and enhanced mobility/conductivity.

Original languageEnglish
Article numbere202316214
JournalAngewandte Chemie - International Edition
Volume63
Issue number3
DOIs
Publication statusPublished - 2024 Jan 15

Bibliographical note

Publisher Copyright:
© 2023 Wiley-VCH GmbH.

Keywords

  • Electrical Conductivity
  • n-Type Polymer Semiconductors
  • Organic Thermoelectrics
  • Selenophene Substitution
  • Thiazole Imide

ASJC Scopus subject areas

  • Catalysis
  • General Chemistry

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