PHOTOELECTRODE USED FOR CARBON DIOXIDE REDUCTION AND METHOD FOR REDUCING CARBON DIOXIDE USING THE PHOTOELECTRODE

摘要

Disclosed is an anode electrode including a nitride semiconductor layer. This nitride semiconductor layer includes an Al_xGa_1-xN layer (0x≦0.25), an Al_yGa_1-yN layer (0≦y≦x), and a GaN layer. The Al_yGa_1-yN layer is interposed between the Al_xGa_1-xN layer and the GaN layer. The value of x is fixed in the thickness direction of the Al_xGa_1-xN layer. The value of y decreases from the interface with the Al_xGa_1-xN layer f toward the interface with the GaN layer. The Al_xGa_1-xN layer is irradiated with light having a wavelength of 360 nm or less so as to reduce carbon dioxide.