Structural and Photoluminescence Studies of (Cu, Al) Co-doped ZnO Nanoparticles

Pristine and co-doped ZnO with doping of Cu and Al nano particles have been successfully synthesized by chemical co-precipitation method without using any capping agent and annealed in air ambient at 5000 C for one hour. Here, the Al concentration is fixed at 5 mol percent and copper concentration is increasing from 1 to 5 mol percent. The Crystallanity, structure and crystallite size of pure and co-doped ZnO nano particles are determined by X-ray diffraction (XRD) in range from 200 to 800. XRD pattern reveals that the samples possess hexagonal wurtzite structure of ZnO and the estimated particle size of pure and co-doped ZnO nano particles is 20-22nm. Morphological and compositional analysis is done by SEM and EDS. Photoluminescence studies reveals the origin of PL emission in the visible region. PL spectrum shows the blue emission peaks appeared at 435, 448 and 468 nm and green emission peak at 536 nm.