Low-potential driven fully-depleted BiVO4/ZnO heterojunction nanodendrite array photoanodes for photoelectrochemical water splitting

Low-potential driven fully-depleted BiVO4/ZnO heterojunction nanodendrite array photoanodes is fabricated for photoelectrochemical water splitting. The electric field developed in radial directions of the nanorods and branches can drive efficient charge separation in the whole electrode. The holes drift following the electric fields with different directions from the light absorption path to the surface for further oxygen evolution. Rather than diffusion, charge transport mechanism is governed by drift in the fully-depleted ND heterojunction array photoanode.315