Effect of heat treatment on photoelectrochemical performance of hydrothermally synthesised Ag2S/ZnO nanorods arrays
Abstract
Low temperature hydrothermal method was used to produce a large surface area ZnO NRs on conductive glass. The same method was used to fabricate a photoelectrode of Ag2S quantum dots onto the nanorod arrays. Ag2S QDs/ZnO NRAs heterostructure was employed as photoanode in a standard 3-electrodes photoelectrochemical cell. A significant enhancement in the photoelectrochemical performance was observed for the Ag2S QDs/ZnO upon heat treatment 400 °C which displayed an impressive photoconversion efficiency of 4.08% by achieving ∼10-times higher compared to bare ZnO NRAs. This enhancement was attributed to the improved morphological structure, crystallinity and optical properties of the synthesised heterostructures.
- Publication:
-
Chemical Physics Letters
- Pub Date:
- October 2018
- DOI:
- 10.1016/j.cplett.2018.08.069
- Bibcode:
- 2018CPL...710..100H
- Keywords:
-
- Hydrothermal deposition;
- Heat treatment;
- ZnO nanorods;
- Ag<SUB>2</SUB>S photoresponse;
- Photoconversion efficiency