Enhanced thermoelectric performance of PEDOT:PSS films by solvent thermal treatment

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• 作者：Endou Liu ; Congcong Liu ; Zhengyou Zhu ; Hui Shi…
• 关键词：Thermal treatment ; PEDOT ; PSS ; Thermoelectric ; Organic solvent
• 刊名：Journal of Polymer Research
• 出版年：2015
• 出版时间：December 2015
• 年：2015
• 卷：22
• 期：12
• 全文大小：1,746 KB
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• 作者单位：Endou Liu (1)
  Congcong Liu (1)
  Zhengyou Zhu (1)
  Hui Shi (1)
  Qinglin Jiang (1)
  Fengxing Jiang (1)
  Jingkun Xu (1)
  Jinhua Xiong (1)
  Yongjing Hu (1)
  
  1. Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang, 330013, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Polymer Sciences
  Industrial Chemistry and Chemical Engineering
  Characterization and Evaluation Materials
  
• 出版者：Springer Netherlands
• ISSN：1572-8935

文摘

Flexible free-standing PEDOT:PSS films were thermally treated by various of high polar organic solvents such as N-methyl-2-pyrrolidone (NMP), ethylene glycol (EG), dimethyl sulfoxide (DMSO) and N,N-dimethylformamide (DMF), and a comparative thermoelectric (TE) study was conducted in the present work. Due to the synergistic effect of high polar solvent and thermal treatment, the maximum electrical conductivity of PEDOT:PSS films was up to 520 S cm? by EG post-treatment at its boiling point (197 °C), resulting in a power factor of 14.9 μW m? K?, which was four orders of magnitude higher than pure PEDOT:PSS film (~0.005 μW m? K?). The improvement of TE performance is primarily caused by the increased electrical conductivity and the steady Seebeck coefficient. As observed from atomic force microscope (AFM) and X-ray photoelectron spectroscopy (XPS) characterization, the enhancement of electrical conductivity is attributed to the removal of excess insulating PSS from the PEDOT:PSS film surface and the separation of the rest PSS chains in the polymer matrix from the PEDOT phase. Keywords Thermal treatment PEDOT:PSS Thermoelectric Organic solvent