Abstract
Cerium doped zinc oxide (CeZnO) (0.001–0.004 M) was deposited on the glass substrate using the spray pyrolysis method. We studied the changes in micro-structural, morphological, optical and gas sensing properties of the thin films at different molarity concentrations. X-ray diffraction (XRD) patterns confirms the hexagonal structure and polycrystalline nature. Crystallite size decreases with increase in Ce concentration. The surface morphology completely modified spherical to hexagonal after adding cerium was observed by using a field-emission scanning electron (FE-SEM) . Transmittance and band gap increases with increases in dopant(Ce) concentrations. The 0.003 M CeZnO thin films shows a good response towards room temperature NH3, the response values is found to be 265.12–2040.81 respectively for 5 ppm–25 ppm. Quick response and recovery time is found to be 18 and 12 s at 25 ppm.
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