Coupling Between Mechanical Pressure and Electron Transport/Transfer Impedances at the Interface of Sandwich Solar Cell

Abstract

This communication is based on electrochemical impedance spectroscopy (EIS) to detect the impedance response of sandwich solar cell components under external pressure. It reveals a new mechanism by which external pressures and internal electrochemical processes interact. The results show that the series resistance of the device increases with pressures and cannot be recovered by pressure withdrawal. The impedance properties of the Pt-electrode/electrolyte interface are insensitive to external pressures. The impedance of the Dye-TiO2/electrolyte is relatively complex and is related to the pressure-induced microstructure of the thin film and the ion distribution of the electrolyte.