Employing rGO as an electron acceptor to enhance th e photocurrent of p-Cu2O

Abstract

A considerable photocurrent enhancement was found at the Cu/p-Cu2O/rGO electrolyte interface in a photo-electrochemical cell with compared to that of Cu/p- Cu2O electrolyte interface. The reason for that may be due to the efficient charge separation process provided at Cu/ p- Cu2O/rGO electrolyte interface. Here rGO (reduced graphene oxide) acts as an electron acceptor for the photogenerated charge carrier as it readily accept electrons from the conduction band of p-Cu2O. rGO was synthesized using electrophoretic deposition technique. Fabricated samples were characterized using diffuse reflectance spectra, photocurrent action spectra and the time development of the photocurrent of photo-electrochemical cells.