Annealing Effect on Structural and Optical Properties of ZnO Films Prepared by Ultrasonic Spray Pyrolysis

Authors : Seniye KARAKAYA

Pages : 670-676

Doi:10.18038/aubtda.267025

View : 15 | Download : 8

Publication Date : 2016-12-01

Article Type : Research Paper

Abstract :Zinc Oxide insert ignore into journalissuearticles values(ZnO); thin films were deposited on glass substrates via the ultrasonic spray pyrolysis technique. The films were subsequently annealed in ambient air from 350°C to 550°C for 3h. The morphology and structural properties of the thin films were studied by atomic force microscopy insert ignore into journalissuearticles values(AFM); and X-ray diffractometry insert ignore into journalissuearticles values(XRD); techniques. The X-ray diffraction studies revealed that the films are polycrystalline with the hexagonal structure and a preferred orientation along insert ignore into journalissuearticles values(002); directions. The optical properties of the films were characterized by UV-vis spectroscopy. The transmission values of the annealed ZnO films were average 80% within the visible range insert ignore into journalissuearticles values(400–700 nm);. The optical band gap values of the films are between 3.27 and 3.23 eV. Electrical resistivity of the films was measured using four-probe measurement system. The electrical resistivity of the films decreased with the increasing annealing temperature. According to our investigation results, it can be seen that annealing treatment plays an important role on the some physical properties of ZnO films.
Keywords : ZnO, Ultrasonic Spray Pyrolysis Technique, XRD