Abstract
In this work, Cu2ZnSnS4 (CZTS) nanoworm films have been directly deposited on fluorine-doped tin oxide (FTO) conductive glass substrates by a solvothermal method using polyethylene glycol 400 (PEG-400) as the solvent and structure-directing agent. The as-obtained CZTS thin films were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Raman spectroscopy, X-ray photoelectron spectrum (XPS), UV–vis spectra and photoelectrochemical measurement. The synthetic conditions, such as reaction temperature, reaction time, solvents, were investigated to know the formation of CZTS thin films. The results showed that PEG-400 plays a key role in the formation of the nanoworms by affecting the crystal growth process. The p-type CZTS nanoworm film with the band gap of 1.62eV was synthesized at 180°C for 22h and the photovoltaic performance was studied by forming a photoelectrochemical cell.
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