We report on a qualitatively improved photoelectrochemical COreduction system which makes it possible to convert CO2 into hydrocarbons. The key is the tandem photoelectrode, which consists of AlGaN/GaN and Si device with p-n junction. The Si device is located on the back of AlGaN/GaN structure and acts as activation layer that raises cathode potential. Use of a Cu cathode results in change of the main reaction products from CO and HCOOH to hydrocarbons such as CHand C The energy conversion efficiency to hydrocarbons from COis estimated to be 0.046% under irradiation with concentrated solar light.
ASJC Scopus subject areas
- Condensed Matter Physics