Open AccessActivating ZnO nanorods photoanodes in visible light by CdS surface sensitiser
Author(s) -
Biswas Indranil,
Roy Kundu Piyali,
Sinha Prasanta Kumar,
Kanu Moumita,
Chakraborty Ashim Kumar
Publication year - 2019
Publication title -
micro and nano letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.25
H-Index - 31
ISSN - 1750-0443
DOI - 10.1049/mnl.2018.5700
Subject(s) - materials science , nanorod , wurtzite crystal structure , photoluminescence , chemical bath deposition , visible spectrum , optoelectronics , tin oxide , water splitting , nanotechnology , chemical engineering , ultraviolet , thin film , photocatalysis , doping , zinc , chemistry , biochemistry , engineering , metallurgy , catalysis
Thin films of c ‐axis aligned uniform ZnO nanorods (NRs) were fabricated on to fluorine‐doped tin oxide‐coated soda lime glass substrate by a two‐step chemical route. Thereafter ZnO NRs/CdS core shell structures were successfully synthesised by depositing CdS layer on top of vertically aligned ZnO NRs using less hazardous nanocrystal layer deposition technique. The presence of CdS in ZnO NRs/CdS core shell structures was confirmed by energy dispersive X‐ray analysis. Examination of structure and morphology of the fabricated films by X‐ray diffraction (XRD) and field emission scanning electron microscopy (FESEM) revealed that both films have one‐dimensional hexagonal wurtzite structure. Optical properties evaluated from ultraviolet–visible and photoluminescence spectra demonstrated better photo response of ZnO NRs/CdS core shell structure with respect to bare ZnO NR structure. Optical to chemical conversion efficiency of ZnO NRs/CdS photoanode was found to be ∼1.75 times higher than bare ZnO NRs photoanode in photo electrochemical water splitting under visible light.