Effect ZnO of substrate temperatures on the structural and optical properties of Na-doped thin films

Abstract EN

ZnO thin films doped with Na have been prepared by chemical vapor deposition technique on the glass substrate at different temperatures (400, 450, 500 °C) for 20 min.

By increasing the dopant Na from 0 to 20% in ZnO thin films were found to lead to pronounced changes in their structure.

From optical properties the band gap energy of the Na-doped ZnO thin films is affected by increasing substrate temperatures and Na doping.

X-ray diffraction (XRD) has shown that the maximum intensity peak corresponds to the (002) predominant orientation for ZnO films.

Scanning Electron Microscope (SEM) images reveal the formation of Na-doped ZnO films having better crystalline behavior by increasing the substrate temperature at 500°C.

Energy dispersive X-ray analysis (EDXA) shows that the structure of ZnO contains Zn and O elements for undoped and Na for doping state.