In this work, we studied deposited Cobalt- doped  ZnO ( ZnO:Co ) thin films via dip-coating technique onto glass substrate, Zinc acetate dehydrate, cobalt acetate, methanol and ethanolamine were used as starting materials.  Then we have characterized   them  UV- visible, scanning electron microscopy (SEM), atomic force microscopy (AFM  ).  It is found that all the thin films have good crystallinity and a preferential  orientation crystallites a long  [002] of  ZnO  with  wurtzite structure.  SEM and AFM  have provided  the information on morphology of this films where the size grain and average surface roughnes (Rms).

Key words :  thin films, ZnO, Cobalt, dip-coating, XRD, UV-Visible.