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.
Bibliographical noteFunding Information:
Sung June Kim, Jeong Kwon contributed to this work equally. This work was supported by the NRF of Korea Grant funded by the Ministry of Science, ICT & Future Planning (2014M3A7B4051747, 2014M3A7B4052200).
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)