Uniform deposition of coupled CdS and CdSe quantum dots on ZnO nanorod arrays as electrodes for photoelectrochemical solar water splitting
Journal
International Journal of Hydrogen Energy
Journal Volume
40
Journal Issue
3
Pages
1388-1393
Date Issued
2015
Author(s)
Abstract
A modified successive ionic layer adsorption and reaction (SILAR) process was used for deposition of coupled CdS and CdSe quantum dots (QDs) on the surface of orientated ZnO nanorod arrays. This solution-based process provides a conformal and homogeneous QDs deposition along the ZnO nanorod arrays with no entry clogging. The prepared multi-heterojunction CdSe/CdS/ZnO nanorod-arrayed photoanodes are highly visible-light-sensitive and show improved ion diffusion and effective suppression of electron - hole pair recombination. For photoeletrochemical solar water splitting, the photoanode prepared using the modified SILAR outperformed that using the conventional SILAR by >15% improvement in solar-to-hydrogen conversion efficiency. Copyright © 2014, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
Subjects
Photoanode; Solar water splitting; ZnO nanowire
SDGs
Other Subjects
Cadmium sulfide; Deposition; Heterojunctions; Nanorods; Nanowires; Solar power generation; Zinc oxide; Effective suppression; Photo-anodes; Photoelectrochemicals; Solar water splitting; Solar-to-hydrogen conversions; Solution-based process; Successive ionic layer adsorption and reactions; ZnO nanowires; Semiconductor quantum dots
Type
journal article