Disruption of interfacial hydrogen-bond network at Si/PNMPy/electrolyte interface for accelerated ion transfer in solar rechargeable devices

Abstract

The Si/poly(N-methylpyrrole) (PNMPy) based two-electrode solar rechargeable devices used HClO4 as the electrolyte exhibits 3-fold and 7-fold higher current densities during photo-charging and dark-discharging processes compared to those of the H2SO4-based device. This enhancement originates from the disruption of interfacial hydrogen-bond network induced by ClO4- that can significantly accelerate ion transfer kinetics at the PNMPy/HClO4 interface.