Photoelectrochemical behavior of a novel composite In0.15Ga0.85As/GaAs|GaAs/Al0.3Ga0.7As multiple quantum well electrode

novel composite InxGa1-xAs/GaAs|GaAs/AlxGa1-xAs multiple quantum well aterial with different well widths was studied as a new kind of photoelectrode in a photoelectrochemical cell. The photocurrent spectrum and photocurrent¯electrode potential curve were measured in ferrocene nonaqueous solution. Pronounced quantization effects and strong exciton absorption were observed in the photocurrent spectrum. The effects of surface states and interfacial states on the photocurrent-electrode potential curve are discussed.