STRUCTURAL AND SURFACE MORPHOLOGICAL INVESTIGATION OF FORMATION STAGES OF HIGHLY (002) ORIENTED ZnO FILMS ON GLASS SUBSTRATES BY SPRAY PYROLYSIS METHOD

ZnO thin films were coated on amorphous glass substrate at various temperatures in the range 160-500 0 C by spray pyrolysis method. The as deposited films were characterised by using XRD and SEM. Wurtzite phase of ZnO was formed at a substrate temperature of 400 0 C, highly oriented (002) phase was developed with respect to increase of substrate temperature from 450 to 500 0 C. Morphological and growth mode of these films were analyzed with respect to structural orientation of films from wurtzite to highly (002) oriented phase. Present study reveals that substrate temperature was one of the important parameters which determine the crystalline quality, population of defects, grain size, orientation and morphology of the films