Nitrogen Doped ZnO Nanomaterials for UV-LED Applications

Dominant acceptor based excitons were observed in the photoluminescence spectra of nitrogen doped ZnO nanoparticles prepared by a low cost DC arc discharge method using carbon as electrode. Emissions corresponding to donor bound excitons and donor-acceptor pair recombination was also observed. High crystalline character of the particles was confirmed from the XRD pattern. Basic E₂ vibration corresponding to ZnO was observed from Raman spectra of all the nanoparticle samples prepared. The particles assumed rod shaped morphology as observed in SEM. The thin films deposited using ball mill dispersed nanoparticles by dip coating method showed acceptor bound exciton in low temperature PL spectrum.