Optical properties of zinc oxide films growth on Si substrate via aqueous chemical growth

This paper presents a methodology to synthesized zinc oxide (ZnO) films by an aqueous chemical growth based technique. Structural, morphology and optical properties of ZnO films were characterized using X-ray diffractometry (XRD), field emission scanning electron microscopy (FESEM) and UV-Visible spectroscopy. This paper aims to study the effect of growth time on the structural, morphology and optical properties of ZnO films. XRD patterns showed a well-defined (101) peak that indicates the crystalline hexagonal ZnO structure. FESEM results revealed hexagonal rods structures growth on Si substrate from 1.5 h to 3 h growth time. The optical band gap for ZnO film has increased from 3.80 eV to 3.90 eV with the increasing of growth time. This result shows that the growth time have influences on the structural, morphology and optical properties of ZnO films.