Electro spray technique to enhance the physical property of sulphur doped zinc oxide thin film

Abstract The Sulphur doped Zinc oxide was deposited using a homemade electro spray technique and the change in physical properties was investigated. This method is used to prepare thin films using insoluble substance with precursor. The structural, optical, magnetic, surface morphology, and electrical studies were carried out using XRD, UV–vis-NIR spectroscopy, HRSEM, AFM, Photoluminescence, VSM and Hall effect. XRD result reveals that the increase of Sulphur does not affect hexagonal wurtzite structure in the film and the compressive force inside the lattice creates the decreasing effect in crystallites size. The enhancement of paramagnetic property due to the addition of Sulphur in ZnO lattice, which increase of oxygen vacancy on surface. The hexagonal plate like grains and formation of cluster shows the remarkable improvement in the carrier concentration, resistivity, and mobility. The sheet resistance reaches a minimum of 25 × 102 Ω/□ at 8at% for S:ZnO than the undoped sample. All the samples achieved the transmittance above 87% in the visible region and optical band gap increases. The performance of the samples on light intensity effect shows interstitial Sulphur ions enhance the rate of decreases in resistance and increase the sensitivity to light than the undoped sample were discussed.