| 초록 |
Photoanodes prepared using CuInS2/CdS/ZnO nanowires were fabricated by a solution-based process forconstructing a photo-driven hydrogen generation system. For efficient light harvesting and photoexcitedcharge collection, ZnO nanowire (NW) photoanode arrays were co-sensitized with CdS and CuInS2 (CIS).A CdS layer was deposited on the ZnO NW via successive ion layer adsorption and reaction (SILAR), andthe CIS layer was prepared by depositing a molecular precursor solution onto the CdS/ZnO NW. Thegenerated anodic photocurrent was increased with the subsequent deposition of the CIS and CdS layers.Ultraviolet photoelectron spectroscopy analysis revealed cascade type-II band alignments for the CIS/CdS/ZnO NW photoanodes, which enabled efficient electron collection. Our heterostructurephotoelectrode has generated a greatly improved photocurrent density of 13.8 mA cm2 at 0.3 V vs. SCEunder 1 sun illumination. |
