The structural, morphological and optical properties of ZnO nanoparticles are investigated regarding doping
[9]. The intensity behind doping is to modify the properties of nanoparticles. Further, to enhance the magnetization
and their utilization in DMS and spintronics, doping of transition metal ions such as Ni, Co, Mn, and Ni are
carried out by the researchers [10]. A number of studies have reported on Co doped ZnO nanoparticles [11]. Talaat
2013 synthesized Co doped ZnO nanoparticles with an average size of 5 - 11 nm using Sol gel method. H. J.
Sugahara in his studies reported an increase in photo luminescence properties by Co doping. Shalendra Kumar
reported room temperature ferromagnetism of Co doped ZnO. Talaat M. reported the increase in the band gap by
Co doping. From theoretical and experimental point of view the transition metal ions doped-ZnO nanoparticles
still continue to be an open topic [12].