Structural, morphological and optical attributes of ZnO thin films deposited via spray pyrolysis process: Impact of molarity variation

Undoped thin films of ZnO were prepared over glass substrates using a simple chemical spray pyrolysis process. The solution aqueous ‘Zinc acetate dehydrate’ was used as precursor and sprayed preheated substrate at 400 °C. concentration changed from 0.2M to 1 M with the step 0.2 its impact on structural, morphological optical properties has been studied help XRD, SEM, UV-Vis Spectroscopy four-probe technique. are polycrystallines, have hexagonal wurtzite structures, preferred orientation in (002) plane. SEM analysis indicates dependency film morphology concentration. Optical Transmittance decreases increasing Maximum transmittance reaches up 51% obtained Decreasing band gap values 3.18 eV 3.04 noted carrier increases