Xu Di, Shen Hujiang, Wang Wei, Xie Junjie, Zhang Tao, Yuan Huihui, Li Yuyu, Chen Xinyu, He Yunlong, Zhang Yumei
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.
Chemphyschem. 2019 Feb 4;20(3):374-382. doi: 10.1002/cphc.201801133. Epub 2019 Jan 4.
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 H SO solutions, including concentrated H SO and H SO diluted with H O 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 I reduction of PEDOT:PSS films were characterized by electrochemical measurements. It is discovered that selecting proper H SO solutions is crucial to improve the charge transfer efficiency and catalytic performance while maintaining reliable adhesion of the film on the substrates, with H SO /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.
对印刷在氟掺杂氧化锡（FTO）衬底上的聚（3,4-乙撑二氧噻吩）：聚（苯乙烯磺酸盐）（PEDOT:PSS）薄膜进行后处理，以提高其电荷转移效率。后处理过程中采用了不同的H₂SO₄溶液，包括浓硫酸以及用H₂O或二甲基亚砜（DMSO）稀释的H₂SO₄。通过胶带剥离试验评估处理后薄膜的附着力，通过电流感应原子力显微镜研究薄膜的表面形貌以及从薄膜到衬底的垂直电荷转移，并通过电化学测量表征PEDOT:PSS薄膜对I⁻还原的催化活性。研究发现，选择合适的H₂SO₄溶液对于提高电荷转移效率和催化性能至关重要，同时要保持薄膜在衬底上可靠的附着力，其中H₂SO₄/DMSO作为后处理溶液表现最佳。基于不同后处理溶液在溶液、PEDOT:PSS和衬底之间的不同相互作用，提出了一种机理解释。
