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<p>A novel n-dopant, 10-(1,3-dimethyl-2,3-dihydro-1H-benzo[d]imidazol-2-yl)-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]thieno[2,3-f]quinoline (ThJLBI), was developed from the benchmark n-dopant of N-DMBI with benzimidazoline backbone, by switching its electron-donating dimethylaniline group to thienojulolidine. Encouragingly, an improved thermoelectric performance over N-DMBI was achieved when doping the representative n-type polymer ThDPP-CNBTz, with a maximum electrical conductivity of 35.4 S·cm<sup>−1</sup> and a power factor of 34.17 µW·m<sup>−1</sup>·K<sup>−2</sup> at the optimized doping concentrations of 40mol%. This work enriches the library of current n-dopants, which can provide the room for developing high-performance n-type polymeric thermoelectrics.</p>

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A Novel Efficient Benzimidazoline-type n-Dopant Containing Thienojulolidine Unit

  • 期刊论文

  • 发表日期：

    2026年4月11日

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  • Jun Zhao,
  • Wei Wang,
  • Chun Zhan,
  • Guangwei Gao,
  • Hao Li,
  • Shikai Zhang,
  • Shengqiang Xiao

摘要

A novel n-dopant, 10-(1,3-dimethyl-2,3-dihydro-1H-benzo[d]imidazol-2-yl)-2,3,6,7-tetrahydro-1H,5H-pyrido[3,2,1-ij]thieno[2,3-f]quinoline (ThJLBI), was developed from the benchmark n-dopant of N-DMBI with benzimidazoline backbone, by switching its electron-donating dimethylaniline group to thienojulolidine. Encouragingly, an improved thermoelectric performance over N-DMBI was achieved when doping the representative n-type polymer ThDPP-CNBTz, with a maximum electrical conductivity of 35.4 S·cm−1 and a power factor of 34.17 µW·m−1·K−2 at the optimized doping concentrations of 40mol%. This work enriches the library of current n-dopants, which can provide the room for developing high-performance n-type polymeric thermoelectrics.