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

Abstract

Composite gel electrolytes of poly(IL) /IL/TiO 2 containing poly [1-(hydroxyethyl)-3-vinylimidazolium hydrogen sulfate] (poly [EtOHVIM ⁺ ][HSO 4 ⁻ ]) as Poly(IL), 1-butyl-3-methyl- imidazolium hexafluorophosphate ([BMIM] PF 6 ) as IL and Titanium Dioxide (TiO 2 ) are prepared for dye-sensitized solar cells (DSSCs), without any volatile organic solvent. The performance of most (DSSCs) based on TiO 2 was limited by the low electron mobility within TiO 2 . To produce a much higher power conversion efficiency performance and better long-term stability of the composite electrolyte without TiO 2 , a proper amount of TiO 2 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.