Oligomer ethylene glycol based electrolytes for dye‐sensitized solar cell

Abstract

Oligomer ethylene glycol (O-EG) based electrolytes without volatile components were prepared and used in dye-sensitized solar cell (DSSC). The characteristics such as viscosity, ionic conductivity, and ionic activation energy of O-EG based electrolytes including liquid, gel and solid states were investigated and compared. It is found that the gel and solid O-EG electrolytes have two E a values with the changed phase state by going with the increased temperature, and they can increase the onset of applied voltage for generating dark current in DSSCs as from 0.222 V with liquid O-EG electrolyte to 0.420 V with gel and solid O-EG electrolytes, which results in the enhanced light-to-electricity conversion efficiency from 1.4% with liquid to 1.82% with gel and 1.86% with solid electrolytes.

An ionic liquid‐based polymer with π‐stacked structure as all‐solid‐state electrolyte for efficient dye‐sensitized solar cells

“…Full replacement of the liquid electrolyte by an all‐solid‐state medium seems to be an effective solution to these problems. Therefore, all‐solid‐state electrolytes, such as p‐type inorganic semiconductor,7–9 organic hole‐transport materials10, 11 and solvent‐free composite polymer electrolyte,12–16 were employed to fabricate the DSCs with good stability. Among these all‐solid‐state electrolytes, composite polymer electrolytes have attracted more attention due to its low cost, great safety and simple fabrication in wide range of shapes.…”