photochemistry cell and power system that uses the same

摘要

The photochemistry cell and power system utilizing the present invention relates to a photochemistry cell (100) comprising: a semiconductor electrode (120) including a conductor (121) and an n-type semiconductor layer (122); a counter electrode (130) electrically connected to the conductor (121); an electrolyte (140) in contact with the surfaces of the n-type semiconductor layer (122) and the counter electrode (130); and a container (110) accommodating the semiconductor electrode (120), counter electrode (130) and electrolyte (140). photoelectrochemical cell (100) generates hydrogen by irradiating the n-type semiconductor layer (122) with light. at the semiconductor electrode (120), relative to the vacuum level, (i) the conduction band and valence band band edge levels in the near field surface region of the n-type semiconductor layer (122), respectively are equal to or greater than the conduction band and valence band band edge levels in the field region near the junction plane of the n-type semiconductor layer (122) with the conductor (121), (11) fermi level of the near-field region near the junction plane of the n-type semiconductor layer (122) is greater than the fermi level of the near-field surface region of the n-type semiconductor layer (122), and (111) the Conductor fermi level (121) is greater than the fermi level of the field region near the junction plane of the n-type semiconductor layer (122).