Deposition and characterization of ZnO thin films fabricated by low temperature chemical bath deposition: annealing effect

In this study, vertically aligned ZnO nanowireds (ZnO NWs) have been grown onto glass substrates bychemical bath deposition (CBD) method at low temperature. The ZnO films are annealed in air at differenttemperature for 1 h to study annealing effect on structural and optical properties. Then the characteristics of thesamples were studied by means of field emission scanning electron microscopy (FESEM), X-ray diffraction (XRD) and photoluminescence (PL). The FESEM images show that the ZnO NWs grown perpendicular to the seeded glasssubstrates. The XRD results reveal that all the ZnO NW arrays grew preferentially oriented along the c-axis in thedirection of (002) plane with a hexagonal wurtzite structure.PL measurements of the grown ZnO NWs on all samples exhibited high UV peak intensity compared to broad visible peak.

Keywords:

ZnO thin films , Chemical bath deposition , Morphology , Annealing effect