| 초록 |
Heterostructure design, i.e., combining dissimilar materials into a single substrate, enables engineering optical, electrical, surface, and electrochemical properties of photoelectrodes for solar water-splitting. Herein, we successfully synthesized a unique textured heterostructure of BiVO4/Sb:SnO2 nanorods array (BVO/ATO NRs), for the first time. The ATO NRs were firstly grown on fluorine-doped tin oxide (FTO)/glass by a hydrothermal growth. Subsequently, the BiVO4 seed layer was coated on ATO NRs by a spin-coating, followed by hydrothermal growth to achieve the c-axis textured heterostructure. Importantly, the textured heterostructure showed enhanced charge collection performance compared to the BVO/ATO nanoparticles heterostructure for photoelectrochemical water splitting. A photocurrent density of ~2.1 mA/cm2 at 1.23 VRHE was recorded, which is nearly 4 times higher than the nanoparticle counterpart. Our result provides a new insight for designing efficient photoelectrode. |
