Clean energy generation by artificial photosynthesis based on semiconductor technology

Abstract

The use of nitride semiconductors has a great potential to realize highly efficient light-emitting diodes and photocatalysts since its bandgap can cover the visible light region varying its alloy composition. A nitride photocatalyst has been developed that can generate solar hydrogen gas by water splitting, and hydrocarbons such as C2H5OH, HCOOH by artificial photosynthesis. Discovery of NiO cocatalyst against nitride photocatalysts has also realized water splitting and artificial photosynthesis, with higher efficiency and long durability. This technology will be useful for clean energy generation and storage.