Doping with proper metal elements via introducing acceptor orbdonor in host material is an effective approach to tune the materials with requisite properties. Among different magnetic semiconductor materials, 3d transition metal-doped ZnO has received maximum attention due to the observation of room temperature ferromagneti sm with suitable magnetic dopant ions. Therefore, selection of proper doping element in ZnO has become an important route for enhancing and controlling electrical, optical and magnetic performanc es of nanomat erials.