TO DEPOSIT ZnO THIN FILMS VIA ELECTRODEPOSITION AT DIFFERENT pH VALUES

Abstract

Thin films of zinc oxide (ZnO) were synthesized by using electrodeposition. The films were produced at three pH value of 6, 7 and 8. Effects of pH on film structure and morphology were investigated in detail. The peaks observed from patterns of X-ray diffraction(XRD) showed that all films formed in hexagonal crystal structure. The optical properties were determined by using absorbance measurements. The optical band gap increased from the 3,17 eV to 3,57 eV as the pH was reduced from the 8 to the 6. It is observed from the scanning electron microscope (SEM) that pH effected surface properties.