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Russian Journal of Electrochemistry

, Volume 54, Issue 11, pp 817–824 | Cite as

Influence of Solvent of in situ Electro-Polymerization on Catalytic Performance of PEDOT Counter Electrode

  • Jinfu MaEmail author
  • Shenghua Yuan
  • Hui Lu
  • Haibo Li
Article
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Abstract

In this work, we discuss the catalytic performance of poly(3,4-ethylenedioxythiophene) (PEDOT) counter electrode prepared via electro-polymerization (EP) method in Na2SO4 aqueous solution and [BMIM]BF4 ionic liquid for dye-sensitized solar cells (DSSCs), respectively. The electrochemical and photoelectric conversion tests result show that [BMIM]BF4 is more beneficial to dissolve EDOT and thereby promote the growth of 3D PEDOT which can increase the catalytic activity. Furthermore, the introduced graphite (Gr) buffer layer can improve the roughness of PEDOT and F-doped tin oxide substrate (FTO), However, in the [BMIM]BF4 ionic liquid, the overgrowth PEDOT on Gr will reduced the properties of the counter electrode (CE) compare to CE without Gr buffer layer. Further, by using the Gr/ PEDOTIL counter electrode, a 4.89% of photoelectric conversion efficiency(PCE, η) was obtained which was up to 82.3% of DSSC–Pt (η = 5.94%) at the same condition. Meanwhile, the electro-catalytic activity of FTO/PEDOTIL and FTO/Gr/PEDOTIL electrode are demonstrated by scanning electrochemical microscopy (SECM).

Keywords

dye-sensitized solar cells poly(3,4-ethylenedioxythiophene) photoelectric conversion efficiency scanning electrochemical microscopy 

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Copyright information

© Pleiades Publishing, Ltd. 2018

Authors and Affiliations

  1. 1.School of Material Science and EngineeringNorth Minzu UniversityYinchuanChina
  2. 2.Key Laboratory of Ningxia for Photovoltaic MaterialsNingxia UniversityYinchuanChina

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