The ameliorative thermoelectric performance induced by heteroatom for dithiophene cyclopentadiene-based polymers and carbon nanotubes composite films
The ameliorative thermoelectric performance induced by heteroatom for dithiophene cyclopentadiene-based polymers and carbon nanotubes composite films
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DOI：
10.1016/j.compscitech.2020.108518
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发表时间：
2020
期刊：
影响因子：
--
通讯作者：
Wang Lei
中科院分区：
文献类型：
--
作者：
Zhou Houbo;Li Xinxin;Gao Chunmei;Yang Fan;Ye Xinyue;Liu Yi;Wang Lei
Heteroatoms containing conjugated polymers have played a significant role in the field of organic electronic materials owing to their unique chemical and physical properties. However, the effects of heteroatoms on the performance of organic thermoelectric materials and composites have rarely been explored. In this work, three kinds of dithiophene cyclopentadiene (DTC) -based polymers, namely P (DTCBT), P (DTSiBT) and P (DTOBT), were prepared through typical Stille coupling polymerization, in which different heteroatoms were incorporated into the DTC moieties. Both the P (DTSiBT) and P (DTOBT) films exhibited superior crystallinity in relative to P (DTCBT) verified by XRD, due to the larger radius of heteroatom or heterocycle. Meanwhile, P (DTOBT) exhibited a stronger interaction with single-walled carbon nanotube (SWCNT) than two other polymers confirmed by Raman spectra. As a results, the SWCNT/P (DTOBT) displayed an optimal power factor of 85.1 ± 2.1 μW m−1 K−2 with the weight ratio of 1 : 2 (33% SWCNT) at room temperature, which is an outstanding value in consideration for the SWCNT/polymer composites at the low SWCNT content.
