SUI Mei-rong,GU Xiu-quan,SHI Mei-lin,WANG Yong,LIU Lin-lin.Improved photoelectrochemical performance by forming a ZnO/ZnS core/shell nanorod array[J].Optoelectronics Letters,2019,15(4):241-244 Improved photoelectrochemical performance by forming a ZnO/ZnS core/shell nanorod array Author Name Affiliation SUI Mei-rong  School of Medical Imaging, Xuzhou Medical University, Xuzhou 221004, China School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China  GU Xiu-quan  School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China  SHI Mei-lin  School of Medical Imaging, Xuzhou Medical University, Xuzhou 221004, China  WANG Yong  School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China  LIU Lin-lin  School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China  Abstract:       ZnO nanorod arrays (NRAs) were prepared via a facile hydrothermal method for photoelectrochemical (PEC) applications. Then, ZnS thin shell layers were deposited onto them via a facile hydrothermal treatment process for constructing a ZnO/ZnS core/shell structure. It was demonstrated that the PEC activity of a ZnO NRA is enhanced significantly after the surface modification, although there weren’t any obvious changes in the visible-light harvesting efficiency. Both the Nyquist and Mott-Schottky (M-S) plots were employed to reveal the reason, which was attributed to higher electrocatalytic activity of ZnS than that of ZnO and the resulting higher charge transfer efficiency across the solid/liquid interfaces. Finally, a schematic band model was proposed for clarifying the charge carrier transfer mechanism occurred at the interfaces. Hits: 689 Download times: 0 View Full Text    Download reader