Fig. 1

The energy barrier at the interface is unfavorable to carrier transfer. Schematic diagram of carrier transfer in heterojunctions with (a) Type II and (b) Type I energy level structures under visible light irradiation.

The energy barrier at the interface is unfavorable to carrier transfer. Schematic diagram of carrier transfer in heterojunctions with (a) Type II and (b) Type I energy level structures under visible light irradiation.