Tough Hydrogel Electrolytes Doped with Polysulfide Redox Couples for Quantum-dot-sensitized Solar Cells

In this work, a novel type of tough hydrogel electrolytes (THGEs) has been developed for the application to quantum-dot-sensitized solar cells (QDSSCs). The THGEs doped with polysulfide redox couples show high dimensional stability and moderate ion conductivity. In addition, the THGEs are expected to mitigate the electron recombination at the TiO2–electrolyte interface as well as to increase the physical durability of QDSSCs.