期刊
JOURNAL OF MATERIOMICS
卷 6, 期 1, 页码 119-127出版社
ELSEVIER
DOI: 10.1016/j.jmat.2020.01.001
关键词
PEDOT:PSS; Ordering; Oxidation level; Thermoelectric; Flexibility
资金
- Guangdong Innovative and Entrepreneurial Research Team Program, China [2016ZT06G587]
- Shenzhen Science Technology Fund, China [KYDPT20181011104007]
- Shenzhen DRC project, China [[2018]1433]
- Centers for Mechanical Engineering Research and Education at MIT
- SUSTech
- Tencent Foundation through the XPLORER PRIZE
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/).
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