Effect of substrate temperature on structural and morphological studies by spray pyrolysed ZnO thin films

Present research work has been focused on the synthesis, growth mechanisms and physical properties of ZnO thin films prepared by cost effective spray pyrolysis technique. ZnO thin films have been grown using spray pyrolysis technique at different substrate temperature (250, 300, 350, 400, and 450 °C). Structural and morphological analysis were done by X-ray Diffraction and Scanning electron microscope. X-ray diffraction result shows that the prepared ZnO films were polycrystalline and observed grain size increases with substrate temperature. The Fourier transform infrared (FTIR) spectroscopy confirmed the formation of ZnO with Zn–O stretching vibrations. SEM analysis confirmed the increase of grain size and change of grain shapes with substrate temperature. The study thus confirmed the pivotal role of substrate temperature in deciding the structural and morphology properties of the ZnO thin films.