Photoelectrochemical characterization of porous Si

The photoelectrochemical measurements of p-Si and porous silicon in 0.1 M H2SO4 were done. The band gap of Si is a bit low for efficient hydrogen production. The silicon was made porous to improve the efficiency of hydrogen production. The porous silicon photocathodes show a substantial improvement in the hydrogen production compared to that of p-Si photocathodes. Studies were done by applying different light flux on the porous silicon.