• Vipul J Shukla
• Dr.Amit Patel

Zinc oxide thin films were deposited on glass substrate from aqueous solution of ZnCl2 and NH3 by chemical bath deposition method. ZnO nanoparticles were generated by zinc chloride as single source precursor. Thermal behavior of the precursor showed a considerable weight loss at about 538˚C by an exothermic reaction with a maximum weight loss rate of 6% per min., complete decomposition of precursor was observed within 87 min with a heating rate of 25˚C/min. TGA analysis of ZnO sample revealed three endothermic peaks around 160˚C, 290˚C and 538˚C. These endothermic peaks are attributed to the loss of volatile surfactant, conversion of zinc hydroxide to zinc oxide nanoparticles and transformation of zinc oxide into zinc nanoparticles. The optical properties were studied using UV-Vis-NIR spectrometer for absorbance of the thin films. The morphology, crystallinity and structural properties are studied by X-ray diffraction (XRD). Also the morphology of the films studied by scanning electron microscope (SEM). XRD and SEM data suggest that good quality ZnO films are obtained. Structural analysis with XRD and SEM revealed that the formed films exhibit a wurtzite hexagonal phase. Refractive index is 1.02 – 1.07. Value of the real part of dielectric constant is 1.03- 1.16.The experimental pattern of the films show very fine peaks indicate a good crystallization.The band gap was 4.26, 4.28, 4.28, 4.29 and 4.30 eV for different number of coat.

Zinc Oxide, Chemical bath deposition, Thin films, TGA, XRD, Scanning Electron Microscopy(SEM), UV-Vis-NIR.

"“Growth, synthesis, structural and optical prop-erties of pure ZnO by colloidal solution route”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.6, Issue 1, page no.693-699, January-2019, Available :http://www.jetir.org/papers/JETIR1901395.pdf

"“Growth, synthesis, structural and optical prop-erties of pure ZnO by colloidal solution route”", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.6, Issue 1, page no. pp693-699, January-2019, Available at : http://www.jetir.org/papers/JETIR1901395.pdf