High Efficiency Photoelectrodes Based on Porous Silicon

摘要

Using the por-Si electrodes promotes the separation of water molecules inside por-Si nanopores and efficient emission of hydrogen during water electrolysis. The por-Si/c-Si heterostructure makes it possible to solve the basic problem of water photoelectrolysis on the silicon electrodes - their energetic insufficiency. The combined electrochemical and physical deposition of Ni on the surface of por-Si, the formation of NiSi - silicide coatings on the surface of the pores, and the subsequent production of por-Si photoelectrodes based on the NiSi/por-Si/c-Si/Al heterostructure makes it possible to improve their corrosion resistance to oxidation and anodic dissolution, increase the efficiency of hydrogen emission, and extend the lifetime of photoelectrodes.