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Optimization of the thermoelectric properties of poly(nickel-ethylenetetrathiolate) synthesized via potentiostatic deposition

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Abstract

The coordination polymer poly(nickel-ethylenetetrathiolate) (poly(Ni-ett)), formed by nickel(II) and 1,1,2,2-ethenetetrathiolate (ett), is the most promising N-type organic thermoelectric material ever reported; it is synthesized via potentiostatic deposition, and the effect of different applied potentials on the optimal performance of the polymers is investigated. The optimal thermoelectric property of poly(Ni-ett) synthesized at 0.6 V is remarkably greater than that of the polymers synthesized at 1 and 1.6 V, exhibiting a maximum power factor of up to 131.6 μW/mK2 at 360 K. Furthermore, the structure-property correlation of poly(Ni-ett) is also extensively investigated. X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS) analyses revealed that the larger size of crystalline domains and the higher oxidation state of poly(Ni-ett) synthesized at 0.6 V possibly results in the higher bulk mobility and carrier concentration in the polymer chains, respectively, accounting for the enhanced power factor.

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Authors and Affiliations

  1. Beijing National Laboratory for Molecular Sciences, Key Laboratory of Organic Solids, Institute of Chemistry, Chinese Academy of Sciences, Beijing, 100190, China

    Yuanhui Sun, Jiajia Zhang, Liyao Liu, Yunke Qin, Yimeng Sun, Wei Xu & Daoben Zhu

  2. University of Chinese Academy of Sciences, Beijing, 100049, China

    Yuanhui Sun, Jiajia Zhang, Liyao Liu, Yunke Qin, Yimeng Sun, Wei Xu & Daoben Zhu

Authors
  1. Yuanhui Sun
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  2. Jiajia Zhang
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  3. Liyao Liu
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  4. Yunke Qin
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  5. Yimeng Sun
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  6. Wei Xu
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  7. Daoben Zhu
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Correspondence to Wei Xu or Daoben Zhu.

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Sun, Y., Zhang, J., Liu, L. et al. Optimization of the thermoelectric properties of poly(nickel-ethylenetetrathiolate) synthesized via potentiostatic deposition. Sci. China Chem. 59, 1323–1329 (2016). https://doi.org/10.1007/s11426-016-0175-9

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  • DOI: https://doi.org/10.1007/s11426-016-0175-9

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