Improving Performance of Dye Sensitized Solar Cells Based On Composite Quasi Solid-State Electrolytes of Poly (ionic liquid)/Ionic liquid/TiO2.

Composite gel electrolytes of poly(IL)/IL/TiO2 containing poly [1-(hydroxyethyl)-3-vinylimidazolium hydrogen sulfate] (poly [EtOHVIM.][HSO4.]) as Poly(IL), 1-butyl-3-methyl-imidazolium hexafluorophosphate ([BMIM] PF6) as IL and Titanium Dioxide (TiO2) are prepared for dye-sensitized solar cells (DSSCs), without any volatile organic solvent. The performance of most (DSSCs) based on TiO2 was limited by the low electron mobility within TiO2. To produce a much higher power conversion efficiency performance and better long-term stability of the composite electrolyte without TiO2, a proper amount of TiO2 was added. Overall power conversion efficiency of 7.46% under simulated AM 1.5 solar spectrum irradiation for (DSSCs) based on the composite electrolytes were showed. This type of composite electrolytes had long-term stability of the (DSSCs), could overcome the drawbacks of volatile liquid electrolytes, and offer a feasible method to fabricate (DSSCs) in future practical applications. [ABSTRACT FROM AUTHOR]