Solar Hydrogen Generation from Nano-structured Semiconductors
Nurdan Demirci Sankır
Abstract: Hydrogen has a huge potential as the safe and efficient energy carrier, which can be used directly in the fuel cells to obtain electricity or it can be used in chemical industry, fossil fuel processing or ammonia production. However, hydrogen is not freely available in nature and needs to be produced. Photoelectrochemical solar cells (PEC-SC) produce hydrogen from water using sunlight and specialized semiconductors, which use the solar energy to directly dissociate water molecules into hydrogen and oxygen. Hence, it is possible to store solar energy via photoelectrochemical conversion. Besides, PEC systems reduce the fossil fuel dependency and curb the exhaust of the carbon dioxide. In this talk, it is aimed to give information about the fundamentals of the PEC-SC systems as well as physical parameters effecting the solar hydrogen generation performance. Then the materials for the PEC-SC will be discussed. Finally, advantages and the usage of the nano-structured wide and low band gap semiconductors for the solar hydrogen generation will be reviewed.