Akademik Veri Yönetim Sistemi
CERAMICS INTERNATIONAL, cilt.46, sa.6, ss.8420-8430, 2020 (SCI-Expanded)
Pure and lithium (Li) doped ZnO films have been grown on soda lime glass substrates by chemical spray pyrolysis technique. Zinc chloride (ZnCl2) and lithium chloride (LiCl), resoluble in deionized water, were used in the process. The growth mechanism of the films as a function of Li content, resulting texture and topography were discussed in detail by X-ray diffraction method (XRD) and scanning electron microscopy (SEM). Obtained films exhibited single phase with polycyrstalline nature. At the same time, changes in crystal quality due to lithium addition were observed and these changes were explained as the presence of lithium atoms in the ZnO's crystal structure as interstitial atoms and the replacement of Li2+ and Zn2+ ions. Topographical features of the films were confirmed by SEM images. In SEM photographs, it was observed that the crystallite size of the films varied as a result of an increase in the lithium doping concentration. Thus, a significant correlation was found between the structural and morphological properties of the films due to Li contribution. Optical properties of the films were evaluated by UV-VIS-NIR spectroscopy and found that the optical band gap of ZnO films exhibit increasing tendency up to 4 at.%Li content and decrease for further Li content. Elemental composition and presence of Li were approved by X-ray photoelectron spectroscopy (XPS) and Li is peak were observed in 55.6 eV in 5 at.% Li doped ZnO films.