Trialkylsulfonium and tetraalkylammonium cations-based ionic liquid electrolytes for quasi-solid-state dye-sensitized solar cells.

Highlights: [•] Novel diethylalkylsulfonium and quaternary ammonium based ILs were synthesized. [•] S224TFSI and N226TFSI ILs possess the T decom of 245°C and 364°C, respectively. [•] The DSSC with S224TFSI achieves the highest efficiency of 4.61%. [•] The EIS analysis was employed to study the charge transfer kinetics of DSSCs. [•] The stability of DSSCs with IL electrolytes is unfailing for 1200h at 50°C. [ABSTRACT FROM AUTHOR]