A new ionic liquid based quasi-solid state electrolyte for dye-sensitized solar cells

Influence of pore structure on ion diffusion property in porous TiO2 coating and photovoltaic performance of dye-sensitized solar cells

“…Therefore, the high ion diffusion coefficient in the TiO 2 coatings with bimodal-sized pores is attributed to the synergistic effect of nanosized pores and submicro-sized pores within the coatings. This result is consistent with the reported literature [27]. A small fraction of large pores was introduced into the TiO 2 coating by adding some spherical polystyrene particles (200 nm in diameter) into the TiO 2 paste prior to the deposition of the coating [27].…”

“…This result is consistent with the reported literature [27]. A small fraction of large pores was introduced into the TiO 2 coating by adding some spherical polystyrene particles (200 nm in diameter) into the TiO 2 paste prior to the deposition of the coating [27]. The limiting current density increased, although some of the large pores are isolated and not well linked to each other [27].…”

“…A small fraction of large pores was introduced into the TiO 2 coating by adding some spherical polystyrene particles (200 nm in diameter) into the TiO 2 paste prior to the deposition of the coating [27]. The limiting current density increased, although some of the large pores are isolated and not well linked to each other [27]. In contrast, the good connection between the nano-sized pores and the submicro-sized pores enhances the synergistic effect of the bimodal-sized pores on the improvement of the ion diffusion property.…”

Recent Developments in Dye‐Sensitized Solar Cells

“…Thus, extensive attempts have been made to solve the above problem by replacing liquid electrolytes with HTMs or (quasi-)solid-state electrolytes. Polymers such as poly(ethylene glycol), [237] poly(methyl methacrylate), [242] poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), [243,244] polystyrene, [239] polymethylhydrosiloxane, [245] 2,4-di-O-dimethylbenzylidene-d-sorbitol, [246] poly(ethylene oxide), [247,248] and hydroxystearic acid [249] have been used as ad-ditives for the solidification of liquid electrolytes. [235][236][237][238] However, with the exception of perovskite-based solar cells, the efficiency of solid-state DSCs is still unsatisfactory compared with liquidelectrolyte DSCs.…”

“…Different materials have been used for electrolyte gelation. Polymers such as poly(ethylene glycol), [237] poly(methyl methacrylate), [242] poly(vinylidene fluoride-co-hexafluoropropylene) (PVDF-HFP), [243,244] polystyrene, [239] polymethylhydrosiloxane, [245] 2,4-di-O-dimethylbenzylidene-d-sorbitol, [246] poly(ethylene oxide), [247,248] and hydroxystearic acid [249] have been used as ad-ditives for the solidification of liquid electrolytes. Among these polymers, PVDF-HFP results in high-performance cells that are highly stable in light-soaking tests.…”