Effect of Deposition Temperature on Structural and Optical Properties of Zno Films Based on Tourmaline Substrates

Abstract

Abstract ZnO nanosheet thin films were obtained by the ultrasonic spray pyrolysis technique (USP) on tourmaline and glass substrates at different deposition temperatures. Structural studies show that ZnO crystals are polycrystalline with hexagonal wurtzite structure. The intensity of the characteristic Raman peak, and the (002) preferential orientation, the degree of crystallinity, the grain size achieved by the XRD results are significantly increased with the elevation of the substrate temperature. SEM images show that the ZnO nanoplates laminate parallel to the substrate and assemble to the flower-like column morphology, and ZnO nano crystals have larger lamellae sizes and wider crystalline columns at higher temperature. UV-Vis measurement confirms the maximum absorption peak of the ZnO films on the tourmalines have more red shifts and stronger intensities than that on the glass substrates, and relatively greater wavelength shifts under higher substrate temperature are also observed.