Abstract
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•PbS was placed on the top of CdS/ZnO NWs (CZ NWs) by (SILAR) method.•Multi-heterojunction PbS/CdS/ZnO NWs could achieve improved visible light absorption and electron-hole separation.•The multi-heterojunction structure shows efficient visible-light-driven PEC efficiency.
ZnO-nanowire arrays (ZNWAs) prepared via hydrothermal method of ZnO NPs/ITO substrates were used as the support to fabricate PbS/CdS/ZnO NWAs composited by using successive ionic layer adsorption and reaction. After confirmation of the structure by using XRD analysis and optical properties using Uv–vis spectroscopy. Hall-effect and photoelectrochemical-performance were conducted for the purpose of studying electrical and photoresponse properties. A twofold- heterostructure (n-n-p) type of the deposition PbS on CdS/ZnO has confirmed from Hall-results. As-prepared photoanode PbS/CdS/ZnO NWs conveyed performance (0.6% @ 0.25 V vs. Ag/AgCl) be found 1.5 times much than CdS/ZnO NWAs and six times much more than ZnO NWs.