Enhanced thermoelectric performances of flexible PEDOT:PSS film by synergistically tuning the ordering structure and oxidation state
Enhanced thermoelectric performances of flexible PEDOT:PSS film by synergistically tuning the ordering structure and oxidation state
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DOI：
10.1016/j.jmat.2020.01.001
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发表时间：
2020-03-01
影响因子：
9.4
通讯作者：
Liu, Weishu
中科院分区：
文献类型：
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作者：
Li, Qikai;Zhou, Qing;Liu, Weishu
柔性聚合物热电薄膜因其与可穿戴电子产品和电子皮肤的相容性而受到广泛关注。在此，我们报道了PEDOT:PSS的热电功率因数从约1 μ Wm(-1) K-2提高到117 μ Wm(-1) K-2，并通过协同调节有序结构和氧化态提高了20%的无底应变。采用离子液体（EMImTCM）将PEDOT与PSS之间的离子相互作用解耦，重新排列结构形态，显著提高了PEDOT的机械柔韧性和导电性。l -抗坏血酸的加入是PEDOT聚合物的有效脱掺杂添加剂，它改变了聚合物的氧化态，从而提高了聚合物的热电功率因子，而不明显牺牲聚合物的机械柔韧性。此外，在1000次弯曲循环下，相应薄膜的电导率保持电稳定（δ R/R-0 < 0.12%），表明具有良好的可弯曲性。我们的工作证明了可控制地定制PEDOT:PSS柔性聚合物热电薄膜的热电和机械性能的可行性。(c) 2020中国陶瓷学会。这是一篇基于CC by-nc-nd许可（http://creativecommons.org/licenses/by-nc-nd/4.0/）的开放获取文章。
Flexible polymer thermoelectric thin film attracts wide attentions because it is compatible with the wearable electronics and e-skin. Herein, we reported an enhanced thermoelectric power factor of PEDOT:PSS from around 1 mu Wm(-1) K-2 to 117 mu W m(-1) K-2 and high substrate-free strain of 20% through synergistically tuning the ordering structure and the oxidation state. An ionic liquid (EMImTCM) was used to decouple the ionic interaction between PEDOT and PSS, rearranging the morphology of structure that significantly benefit the mechanical flexibility and the electrical conductivity. The addition of L-ascorbic acid was confirmed as effective dedoping additive of PEDOT polymer that changed the oxidation state and hence boosted the thermoelectric power factor without notable sacrifice of the mechanical flexibility. Moreover, the electrical conductivity of the corresponding film maintained electrically stable (Delta R/R-0 < 0.12%) under 1000 bending cycles which indicates the great bendability. Our work demonstrated the feasibility to controllably tailor the thermoelectric and mechanical performance of the PEDOT:PSS flexible polymer thermoelectric thin film. (c) 2020 The Chinese Ceramic Society. Production and hosting by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).