Two types of triblock copolymers were prepared by utilizing a PEG-functionalized macro-RAFT agent, which have structures of PEG-b-(P(AN-co-BMAAm))2 (SGT-602) and PEG-b-(P(AN-co-DMAAm))2 (SGT-604). SGT-602 and SGT-604 were successfully dissolved in a liquid electrolyte with acetonitrile (ACN) solvent. The gel electrolyte, including SGT-604 or SGT-602, was electrochemically investigated by using a symmetrical dummy cell, in which a thin layer of the gel electrolyte solution is sandwiched between two identical electrodes, and introduced to dye-sensitized solar cells (DSSCs). TiO2 nanofiller was employed to the gel electrolytes in order to improve cell performance with fixed polymer contents. The optimized composition of TiO2 nanofiller was found to be 10 wt% to total weight of the polymer gel electrolytes. The resulting TiO2 composite gel electrolytes showed efficiencies of 9.30% and 9.39% for TiO2 composite gel with SGT-602 (Jsc: 17.98 mA cm-2, Voc: 733 mV, FF: 70.59%) and SGT-604 (Jsc: 17.90 mA cm-2 Voc: 746 mV FF: 70.35%), which are comparable to that of liquid-state DSSCs (η: 9.86%, Jsc: 18.23 mA cm-2, Voc: 730 mV, FF: 74.05%). In this presentation, the effect of copolymer compositions, molecular weights and copolymer loading amounts on cell performances will be discussed in more details.

Well-defined triblock copolymer/TiO2 composite gel electrolytes for high-performance dye-sensitized solar cells

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.