反离子聚合PEDOT薄膜的热电性能研究进展
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贵州大学材料与冶金学院

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国家自然科学基金资助项目(51663066)


Progress on Thermoelectric Properties of Counter-ion Polymerized PEDOT Thin Films
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    摘要:

    目前,反离子的选择对电化学聚合聚(3,4-乙烯二氧噻吩)(PEDOT)薄膜的结构和热电性能的影响备受关注,在报道的聚合物薄膜中,PEDOT:聚(苯乙烯磺酸盐)(PSS)、PEDOT:甲苯磺酸盐(Tos)、PEDOT:高氯酸(ClO4)和PEDOT:三氟甲磺酸酯(OTf)等被广泛研究。本文综合分析了不同类型反离子对PEDOT薄膜热电性能的应用研究,重点举例阐述了PEDOT:PSS和PEDOT:Tos提高热电性能的不同工艺方法,PEDOT:PSS薄膜具有高电导率、可水处理和热稳定性高等特点,经二次掺杂、化学去掺杂和连续处理工艺有效的提高了热电性能,但是PSS有亲水性的限制;而Tos具有疏水性,且PEDOT:Tos薄膜能够有效平衡赛贝克系数和电导率的关系;其它的PEDOT:ClO4和PEDOT:OTf等薄膜对热电性能也起到了一定的促进作用。最后,展望了反离子聚合PEDOT薄膜作为柔性热电器件和可穿戴电子器件的开发和实际应用。对进一步研究新的反离子聚合具有一定的参考价值。

    Abstract:

    Currently, the effect of the choice of counter ions on the structure and thermoelectric properties of electrochemically polymerized poly(3,4-ethylenedioxythiophene) (PEDOT) films has attracted much attention. Among the reported polymer films, PEDOT:poly(styrene) Sulfonate) (PSS), PEDOT: Tosylate (Tos), PEDOT: Perchloric acid (ClO4) and PEDOT: Trifluoromethanesulfonate (OTf) have been extensively studied. This paper comprehensively analyzes the application of different types of counter ions on the thermoelectric properties of PEDOT films, and focuses on the different process methods of PEDOT:PSS and PEDOT:Tos to improve the thermoelectric properties. PEDOT:PSS films have high conductivity, water treatment and thermal properties It has the characteristics of high stability, and the thermoelectric performance is effectively improved by secondary doping, chemical de-doping and continuous treatment, but PSS has the limitation of hydrophilicity; Tos is hydrophobic, and PEDOT:Tos film can effectively balance the competition The relationship between Baker coefficient and electrical conductivity; other films such as PEDOT:ClO4 and PEDOT:OTf also play a certain role in promoting the thermoelectric performance. Finally, the development and practical application of counterion-polymerized PEDOT films as flexible thermoelectric devices and wearable electronics are prospected. It has a certain reference value for further research on new counter ion polymerization.

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  • 收稿日期:2022-08-23
  • 最后修改日期:2022-12-05
  • 录用日期:2022-12-08
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