Tunability of ZnO Optical Band on Varying Zn2+ Concentration
Journal Title: International Journal for Research in Applied Science and Engineering Technology (IJRASET) - Year 2014, Vol 2, Issue 10
Abstract
Zinc oxide (ZnO) film is grown by utilizing Ammonium Zincate precursor through Successive Ionic Layer Adsorption and Reaction (SILAR). SILAR processes involves subsequent dipping cycles in cationic and anionic solution under suitable reaction conditions, which facilitates the controlled homogeneous film growth. Significance change in physical properties on change in concentration and dipping cycles, are analyzed by XRD, SEM, Profilometer and UV-Vis spectroscopy. Absence of additional peaks other than ZnO phase in diffraction pattern confirm the phase purity. In addition, observed strong peak intense imports well crystalline nature even at this low reaction temperature. Particularly the film grown with 0.05 molarity has its preferred orientation along (002) plane. Indicates that the grown is predominantly along c-axis as hexagonal structure oriented in perpendicular direction to substrate surface. SEM morphology, the porous particles and small islands of agglomeration are observed for high molarity films. In agreement with the physic observation the 0.05 molarity film show high transmittance (wavelength range 350-800nm) and low transmittance near fundamental absorption.
Authors and Affiliations
S Hussain, K Sathiyaraj, J. Joseph Prince
Keywords
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