Long-term Stability of Conducting Polymers in Iodine/iodide Electrolytes: Beyond Conventional Platinum Catalysts

Sung June Kim, Jeong Kwon, Jae Keun Nam, Wanjung Kim, Jong Hyeok Park

Research output: Contribution to journalArticle

3 Citations (Scopus)


One of the primary obstacles to the commercialization of dye-sensitized solar cells (DSSCs) is the improvement of their long-term stability. Here, we report greatly improved long-term stability of DSSCs, which have PEDOT:FTS polymer as a counter electrode. DSSCs with this PEDOT:FTS film demonstrate slightly lower power conversion efficiency of 8.1% under standard conditions (AM 1.5 G, 100 mWcm−2) compared to the ∼9.1% efficiency of Pt, using an electrolyte with iodine/iodide, which is the most popular redox shuttle. However, we demonstrate that this conducting polymer counter electrode facilitates the fabrication of solar cells with greatly improved long-term stability compared to Pt-based ones after exposure to electrolyte soaking conditions. Various electrochemical analyses were performed to evaluate the enhanced durability of PEDOT:FTS polymer in the highly corrosive iodine/iodide electrolyte under a continuous redox reaction condition.

Original languageEnglish
Pages (from-to)95-100
Number of pages6
JournalElectrochimica Acta
Publication statusPublished - 2017 Feb 10


All Science Journal Classification (ASJC) codes

  • Chemical Engineering(all)
  • Electrochemistry

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