Ionic liquid-tethered nanoparticle/poly(ionic liquid) electrolytes for quasi-solid-state dye-sensitized solar cells

摘要

Ionic liquid-tethered TiO_2 nanopartides are prepared by tethering l-methyl-3-[(triethoxysilyl)propyl]imidazolium chloride (TMIC1) to TiO_2 nanopartides. The quasi-solid-state dye-sensitized solar cells containing 15wt% of ionic liquid-tethered nanoparticle/poly(ionic liquid) hybrid electrolytes show an overall power conversion efficiency of ～5.67% under simulated AM 1.5 solar spectrum irradiation at 50mWcm~(-2). Compared with unmodified TiO_2 nanopartides, ionic liquid-tethered nanoparticle based hybrid gel electrolytes show enhanced short circuit current density (J_(sc)), open circuit voltage (V_(oc)), photoelectric conversion efficiency (η), and better long-term stability of the devices. These results indicate that the cells based on ionic liquid-tethered nanoparticle hybrid electrolytes could overcome the drawbacks of volatile liquid electrolytes, and offer a feasible method to fabricate quasi-solid-state DSSCs in future practical applications.