Effect of H2SO4 Solution Treatment on Adhesion,Charge Transfer,and Catalytic Performance of Screen-Printed PEDOT:PSS |
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| Authors: | Dr. Di Xu Dr. Hujiang Shen Dr. Wei Wang Dr. Junjie Xie Tao Zhang Huihui Yuan Yuyu Li Xinyu Chen Yunlong He Yumei Zhang |
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| Affiliation: | 1. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899 P. R. China;2. CAS Key Laboratory of Materials for Energy Conversion, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai, 201899 P. R. China School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai, 201209 P. R. China |
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| Abstract: | Post-treatment was performed for poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) films screen-printed on fluorine-doped tin oxide (FTO) substrates, to improve their charge transfer efficiency. Different H2SO4 solutions, including concentrated H2SO4 and H2SO4 diluted with H2O or dimethyl sulfoxide (DMSO), were adopted during the post-treatment. The adhesion of the as-treated films was evaluated by adhesive tape peeling tests, the surface morphology and vertical charge transfer from the films to the substrates were investigated by current-sensing atomic force microscopy, and the catalytic activities toward I3− reduction of PEDOT:PSS films were characterized by electrochemical measurements. It is discovered that selecting proper H2SO4 solutions is crucial to improve the charge transfer efficiency and catalytic performance while maintaining reliable adhesion of the film on the substrates, with H2SO4/DMSO performing best as the solution for post-treatment. A mechanistic explanationis proposed based on different interactions among solution, PEDOT:PSS, and the substrate for various post-treatment solutions. |
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| Keywords: | poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) screen printing post-treatment charge transfer catalysis |
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