Thermoelectric thiophene dendrimers with large Seebeck coefficients,Molecular Systems Design & Engineering

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Thermoelectric thiophene dendrimers with large Seebeck coefficients
Molecular Systems Design & Engineering ( IF 3.2 ) Pub Date : 2020-04-02 , DOI: 10.1039/d0me00017e
Kota Oki _{1,

2,

3,

4,

5} , Shohei Horike _{1,

2,

3,

4,

5} , Mana Yamaguchi _{1,

2,

3,

4,

5} , Chikayo Takechi _{1,

2,

3,

4,

5} , Yasuko Koshiba _{1,

2,

3,

4,

5} , Tatsuya Fukushima _{1,

2,

3,

4,

5} , Atsunori Mori _{1,

2,

3,

4,

5} , Kenji Ishida _{1,

2,

3,

4,

5}

Affiliation

π-Conjugated dendrimers are emerging platforms for molecular-based photonics and electronics. Herein, we demonstrate thiophene dendrimers as new thermoelectric (TE) materials with large Seebeck coefficients through chemical charge-carrier doping, conducting film preparation, and TE transport evaluations (electrical conductivity and Seebeck coefficient). Complementary characterization with absorption, photoelectron spectroscopy, and molecular calculations reveals that the highly degenerate frontier molecular orbital energy levels derived from the highly branched and symmetric molecular structures of the dendrimers play an important role in the anomalously large Seebeck coefficients based on Mott's equation. With the recent rapid progress in the technologies for synthesizing π-conjugated dendrimers and molecular designing flexibilities, our results propose a novel strategy for exploring new TE materials.

中文翻译：

塞贝克系数大的热电噻吩树枝状聚合物

π共轭树枝状大分子是基于分子的光子学和电子学的新兴平台。在本文中，我们通过化学载流子掺杂，导电膜制备以及TE传输评估（电导率和塞贝克系数）证明了噻吩树枝状聚合物作为具有大塞贝克系数的新型热电（TE）材料。与吸收，光电子能谱和分子计算的互补性表征表明，源自树枝状聚合物的高度分支和对称分子结构的高度简并的前沿分子轨道能级在基于Mott方程的异常大塞贝克系数中起着重要作用。随着π共轭树枝状大分子合成技术和分子设计灵活性的最新发展，

更新日期：2020-04-02

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