The structural and optical properties of ZnS films optained by spraying solutions at different molarities

Abstract

ZnS films were produced by using aqueous solutions in three different concentrations. ZnS films were formed at 300 +/- 5 degrees C on glass substrates by using ultrasonic spray pyrolysis (USP) method. the effects of sprayed aqueous solution on structural and optical characteristics of these films were analyzed. X-ray diffraction (XRD) results showed that change in solution concentration had an effect on crystallization levels and preferential orientation of the films. Crystallization sizes of the films were around 5.25-6.28 nm. the Zn-S, C-O, and C-H vibration mode peaks of films observed in Fourier transform infrared (FT-IR) spectra were symmetrical and almost at same intensity. Raman spectra taken at 100-1500 cm(-1) range changed by increasing concentration. It was observed that ZnS films held well on the surface through the Scanning electron microscope (SEM) analyses. As molarity increased, transmittance edge shifted towards smaller wavelengths. At 350 nm wavelength, maximum transmittance value increased up to 85%. in the visible section, reflectance values of the films got very close values to each other. (C) 2019 Elsevier Ltd. All rights reserved.