Transient response in n-InP PEC cells and effect of surface modification

The transient photovoltaic response of single crystal n-InP electrodes in a PEC cell has been studied at different frequencies using a light chopper. The variables were light intensity, chopping frequency and redox species. The nature of the response and time constants were found to be sensitive to modification of the InP surface using ruthenium ions. The capture cross-section and density of traps at the semiconductor-electrolyte interfaces have thus been determined.