Stepped Light-Induced Transient Measurements of Photocurrent and Voltage in Dye-Sensitized Solar Cells: Application for Highly Viscous Electrolyte Systems

摘要: To measure electron diffusion coefficients (D) and lifetimes (τ) of dye-sensitized solar cells (DSC), we introduced stepped light-induced transient measurements photocurrent voltage (SLIM-PCV), which can simplify the optical setup reduce measurement time in comparison to conventional time-of-flight frequency-modulated measurements. The method was applied investigate influence viscosity a thermally stable high-boiling-point solvent on energy conversion efficiency DSCs. By systematic study viscosity, species cations as counter charge I-/I3-, concentrations electrolytes, concluded that lower dye cation reduction rate due slower iodine is limiting factor for highly viscous electrolyte system. On other hand, comparable values D increased τ were observed electrolyte. employing 0.5 M TBAI 0.05 I2 propylene carbonate, DSC ...