Cost-effective liquid-junction solar devices with plasma-implanted Ni/TiN/CNF hierarchically structured nanofibers

Carbon-based conductive materials have been recognized as promising alternatives to noble metals the electrode in optoelectronic devices. Herein, by utilizing energetic plasma ion implantation, Ni-doped TiN nanowire (NWs) modified graphitic carbon nanofibers (CNF) are designed and prepared candidates of platinum (Pt) counter for low-cost hybrid perovskite-based liquid-junction photoelectrochemical solar cells (LPSCs). Notably, (PEC) response p-Rb0.05FA0.95PbI3 based-LPSCs equipped with Ni/TiN/CNF is almost identical that a typical Pt electrode. From electrochemical investigations, i.e., impedance spectroscopy (EIS), we observe CNF-based show similar redox activity compared electrode, indicating low charge-transfer resistance (Rct) large capacitance (C). The LPSCs, configuration p-Rb0.05FA0.95PbI3/BQ (2 mM), BQ? mM)/Ni/TiN/CNF-based exhibit an open-circuit photovoltage 1.00 V short-circuit current density 7.02 mA/cm2 under 100 mW/cm2 irradiation. overall optical-to-electrical energy conversion efficiency 5.06%. PEC cell shows good stability 5 h enables potential applications, including but not limited devices, dye-sensitized (DSSCs), fuel devices hydrogen evolution reaction.